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    • 专利摘要:
    A media processing device comprises: a platen roller configured to move a media unit along a media processing path to traverse a print head adjacent to the platen roller; an upstream drive assembly comprising (i) a fixed upstream roller disposed along the support processing path on a first side of the platen roller; and (ii) an upstream moving roll adjacent to the upstream fixed roll; a downstream drive assembly comprising (i) a downstream fixed roller disposed along the support processing path on a second side of the platen roller; and (ii) a downstream moving roll adjacent the downstream fixed roll; a controller configured to control a motor to move, in a predefined sequence, the upstream movable roller and the movable roller between the engaged and disengaged positions.
    公开号:FR3068644A1
    申请号:FR1856216
    申请日:2018-07-05
    公开日:2019-01-11
    发明作者:Thomas R. Helma；Morgan Hassan Malone
    申请人:ZIH Corp；Zebra Technologies Corp；
    IPC主号:
    专利说明:

    MEDIA UNIT UPGRADE ASSEMBLY FOR MEDIA PROCESSING DEVICES
    Cross Reference to Related Applications The present application claims priority over provisional American patent application 62/529572, filed on July 7, 2017, the content of which is incorporated here for reference.
    Background [0002] Media processing devices configured to process discrete media units, such as card printers configured to print identity cards, include printheads configured to apply indicia (e.g. images and text) on the cards. The performance of the print head can be negatively affected by variations in the angle between the cards and the print head.
    Brief description of the different views of the drawings [0003] Figure 1 illustrates an exemplary support processing device.
    FIG. 2 illustrates a sectional view of the support processing device of FIG. 1.
    FIG. 3 illustrates a right upper isometric view of certain internal components of the support processing device of FIG. 1.
    FIG. 4 illustrates a lower right isometric view of the components of the drive assembly upstream and downstream of the support processing device of FIG. 1.
    FIG. 5 illustrates a side elevation view of the components of the support processing device shown in FIG. 4.
    FIG. 6 illustrates a lower isometric front view of the components of the drive assembly upstream and downstream of the support processing device of FIG. 1.
    Figures 7 to 11 illustrate side elevational views of the components of the drive assembly upstream and downstream of the support processing device of Figure 1 in a sequence of operational positions.
    Figures 12A-12B illustrate front elevation views of an alignment bar upstream of the support processing device of Figure 1 in operational positions engaged and disengaged.
    Figures 13A-13B illustrate rear elevation views of an alignment bar downstream of the support processing device of Figure 1 in operational positions engaged and disengaged.
    Detailed Description [0012] Some support processing devices are configured to process discrete support units, such as identity cards (for example driver's licenses or employee badges). Some examples illustrated here are described using the term "cards". However, the cards are exemplary discrete support units and the exemplary methods and apparatus described herein can be applied to any suitable type of discrete support unit (s).
    Support processing devices typically drive a support unit such as a card beyond a print head, which is configured to apply indicia to the surface of the card. The effectiveness of the printhead in applying such indices may depend on the angle of the map relative to the printhead. Some printheads are movable, allowing the printhead to be controlled to adjust the angle mentioned above during printing. However, in some media processing devices, the angle of the card itself with respect to the media processing device may vary while the card is moving past the print head. When card movement is allowed as mentioned above, printing efficiency can be reduced, and printing artifacts such as density variations caused by acceleration (also referred to here as aliasing ) appearing on the card can be entered. In addition, the potential for such displacement may require deployment of the printheads with larger ranges of operational angles, which can reduce the efficiency of the printheads, increase the cost and complexity of the printheads. or both.
    Some support processing devices use pinch rollers upstream and / or downstream of the print head in an effort to limit the distance of the card from the desired path of movement beyond the printhead. However, in such devices, the pinch rollers are typically disengaged from the card when the print head engages the card, thereby allowing unwanted movement of the card. Other attempts to resolve the above problems may include the use of pinch rollers which are not released. However, in devices in which the pinch rollers are not released from the card, the trailing edge of the card can snap or jump after leaving the pinch roller when the card moves beyond the head. impression. Such movement can lead to aliasing artifacts on the map.
    The examples described here relate to a support treatment device comprising: a platen roller configured to move a support unit along a support treatment path in order to pass through a treatment head adjacent to the platen roller; an upstream drive assembly comprising (i) an upstream drive roller disposed along the media processing path on a first side of the platen roller; and (ii) a movable upstream nip roller housing carrying an upstream nip roller adjacent to the upstream drive roller; a downstream drive assembly comprising (i) a downstream drive roller disposed along the support processing path on a second side of the platen roller; and (ii) a movable downstream nip roller housing carrying a downstream nip roller adjacent to the downstream drive roller; a controller configured to control a motor to move, in a predefined sequence, the upstream roller housing to engage the upstream nip roller with the upstream drive roller and the downstream roller housing to place in engagement the pinch roller downstream with the drive roller downstream.
    Figure 1 below illustrates an exemplary support processing device 100 manufactured according to the teachings of this disclosure. The support processing device 100 comprises a housing 104 defined by a plurality of panels. The media processing device 100 stores a supply of discrete media units, such as cards (e.g., identity cards) in an unprocessed media source. In this example, the untreated support source 5 is an inlet hopper (not shown) inside the housing 104) and accessible from outside the support processing device 100 via an inlet hopper door 108. The support processing device 100 also includes an auxiliary entry slot 112 for insertion of the individual support units into the entry hopper. The support processing device 100 10 generates indices on a support unit from the inlet hopper before distributing the support unit in the treated support outlet. In this example, the treated media outlet is an outlet hopper 116 accessible via an outlet opening 120. The indices applied to the support units by the support processing device 100 come from a cassette (for example a cassette with Ribbon) supported inside the housing 104 and accessible from outside the support processing device 100 via a cassette access door 124. In some examples, the access door 124 includes a latch to prevent unauthorized access to the interior of the support processing device 100 and, as described below, the rejected support units. In particular, the outlet opening 120 2 0 associated with the treated medium (that is to say the cards not rejected) is separated from the waste zone.
    Referring to Figure 2, there is illustrated a sectional view of the support processing device 100 exemplary of Figure 1. As observed in Figure 2, the support processing device 100 comprises, inside the housing 104, an untreated support inlet in the form of an inlet hopper 200. The inlet hopper 200 is configured to store a plurality of discrete support units 204, such as cards identity, in a substantially horizontal stack. The input hopper 200 can hold support units 204 of a variety of thicknesses. For example, each support unit 204 has a thickness of between 0.2 and about 1 mm. Typically, all of the supply of support units 204 in the input hopper 200 at any given time is the same thickness. However, in some examples, the support processing device 100 is also configured to process a set of support units 204 having a plurality of different thicknesses.
    A collection roller 208 is disposed at an outlet 212 of the inlet hopper 200 and is configured to distribute a single support unit 204 of the inlet hopper 200 to a configured carrier transport assembly to guide the support unit 204 along a support processing path 216. The support processing device 100 also includes an input roller 220 at the slot 112, configured to drive a single support unit brought into the slot 112 under the stack of support units 204 already present (if any) in the input hopper. The single support unit brought into the slot 112 is then dispensed from the inlet hopper 200 for movement along the support processing path 216. In other words, the support processing device 100 is configured for processing the support units recovered from the stack in the entry hopper 200, as well as single-feed support units received via the entry slot 112.
    The inlet hopper 200 also contains a biasing assembly 224 disposed above the stack of support units 204. The collection roller 208 distributes the lower support unit of the stack of support units 204 by frictionally engaging the lower support unit 204. If insufficient force is exerted by the lower support unit on the collection roller 208, frictionally engaging between the collection roller 208 and the support unit may be too small for the collection roller 208 to pick up and distribute the support unit 204. When the input hopper 200 is full, the weight of the stack of support units 204 may alone apply sufficient force for engagement between the lower support unit and the collection roller 208. The bias assembly 224 is configured to apply a progressively greater force on top of the stack of support units 204 as the stack shrinks in size, thereby maintaining a substantially constant force on the lower support unit. The bias assembly 224, in this example, is implemented as a stressed Sarrus link to an extended position, in which the bias assembly 224 applies a force to the support units 204 (the connection is shown in a retracted position in Figure 2) by one or more biasing elements, such as the combination of coil springs.
    The carrier transport assembly includes a plurality of rollers and guide surfaces. The media processing path 216, as seen in Figure 2, extends from the input hopper 200 to a processing head 228, such as a print head configured to apply indicia to the media unit 204 by transferring the ink to the media unit 204. In this example, the media processing device 100 is a thermal transfer printer, and the print head 228 is supplied with the ink from 'A ribbon inside a cassette 232 removably supported inside the housing 104. The housing 104 includes an opening (not shown in Figure 2) allowing access to the cassette 232. The Cassette access door 124 mentioned above has a closed position (shown in Figure 2) to plug the opening to prevent access to the cassette 232, and an open position to allow placement and the withdrawal of the c base 232 in and out of the support processing device 100.
    During printing operations, an ink ribbon (not shown) moves from a supply roller 236 of the cassette 232 to the print head 228, and then to a traction roller 240 of the cassette 232. The ribbon is driven by a motor configured to move the ribbon at a constant / controlled speed and / or tension. Velocity or voltage oscillations can result in aliasing artifacts. Precise control of the speed and / or tension on the pull side of the ribbon (i.e., via the pull roller 240) can reduce aliasing and other printing artifacts. A ribbon traction motor is directly meshed with the traction roller 240 to control the traction of the ribbon spool. As will be clear to those skilled in the art, variations in ribbon tension during printing can cause the ribbon to move irregularly over the print head 228, resulting in aliasing and other artifacts. In some examples, the ribbon traction roller 240 or the motor driving the ribbon traction roller 240 includes a rotation sensor, such as a quadrature encoder, configured to transmit a signal representing the measured rotational speed of the ribbon roller. ribbon traction 240. The control member is configured to modulate a supply current (or another appropriate operational parameter) relative to the motor according to the sensor signal, to maintain a substantially constant ribbon traction speed. For example, the controller can store a target speed, and modulate the current supplied to the motor driving the traction roller 240 based on a deviation between the target speed and the actual speed, as indicated by the sensor. . The oscillatory behavior of the ribbon in a controlled tension environment can therefore be suppressed.
    When the ink ribbon and the support unit 204 pass through the print head 228, the ink ribbon is in contact with the support unit 204. In order to generate the indices mentioned above, certain elements ( for example print head dots) from the print head 228 are selectively supplied (for example heated) according to machine readable instructions (for example print line data or dot mode). When energized, the elements of the print head 228 apply energy (for example heat) to the ribbon in order to transfer the ink to specific parts of the support unit 204.
    In some examples, the processing of the support unit 204 also includes coding data in an integrated circuit, such as a radio frequency identification tag (RFID), a magnetic strip or their combination, embedded in the support unit 204. Such processing can take place at the level of the print head 228 mentioned above, or at the level of a discrete secondary treatment head upstream or downstream of the print head 228 along the support processing path 216.
    Having passed through the print head 228, the support unit 204 is transported along the support treatment path 216 to the outlet hopper 116. However, in this example, before arriving at the output hopper, the support unit is transported to a support unit redirector 244 which can be controlled to invert or invert the support unit 204 by receiving the support unit 204, turning about 180 degrees and expelling the support unit 204. The redirector 244 is configured to perform the above functions (receiving, returning and expelling a support unit 204) under motive power supplied by a single source, such as a motor.
    Therefore, the carrier transport assembly is configured to operate in two opposite directions along at least a portion of the carrier processing path 216 (illustrated in double lines). Specifically, the media processing path 216 continues in a return direction (as opposed to an exit direction from the input hopper 200 to the print head 228 and the redirector 244, described above ) from the redirector 244 to the print head 228. Because of the support unit 204 which has been turned over at the redirector 244, on the return passage of the print head 228, an opposite side of the media unit 204 is exposed to the print head 228 relative to the output passage of the print head 228. In other words, the media processing device 100 can apply indicia to both sides of the media. the support unit 204, before the support unit 204 is transported along the residual part of the support treatment path 216 to the outlet hopper 116.
    Before entering the redirector 244, the support unit 204 is transported by the rollers 246 and 247 of the transport assembly mentioned above, to pass through one or more alignment assemblies, as will be discussed below. At least one of the alignment assemblies is configured to align the support unit 204 laterally (i.e., in a direction substantially perpendicular to the direction of movement along the support processing path 216 ) before the support unit 204 enters the redirector 244. In addition, as will also be discussed below, the alignment assembly is configured to retract from the support processing path 216 when the support unit 204 exits redirector 244 in the return direction.
    As mentioned above, on each side of a platen roller 245 (adjacent to the print head 228) are the rollers 246 and 247. The rollers 246 and 247 are also designated as fixed rollers in the discussion below. In particular, although the rollers 246 and 247 rotate around respective axes, the axes themselves are fixed. That is, the position of the rollers 246 and 247 relative to the support processing path 216 is static, despite the rotation of the rollers 246 and 247. Furthermore, in the present example, the fixed rollers 246 and 247 are driven by one or more motors (not shown in Figure 2) to propel the support unit 204 along the support processing path 216. Therefore, the fixed rollers 246 and 247 can also be designated by the term of drive rollers or fixed drive rollers. In other examples, one or both of the fixed rollers 246 and 247 may be passive (i.e., non-driven) rollers.
    As will be discussed in more detail above, each of the fixed rollers 246 and 247 are components of the respective upstream and downstream drive assemblies. The above-mentioned assemblies also include respective movable rollers adjacent to the corresponding fixed roller. The movable rollers (not shown in FIG. 2) are movable relative to the fixed rollers 246 and 247 in that the axes of rotation of the movable rollers are movable relative to the support treatment path 216 (and therefore also relative to fixed rollers 246 and 247) between the engaged and released positions. As will be discussed below, in the engaged position, a given roller of the movable rollers is positioned a first distance from the corresponding fixed roller to engage the support unit 204 when the support unit 204 passes through the print head 228. That is, when the movable roller is in the engaged position, the movable roller and the corresponding fixed roller form a nip through which the support unit 204 can pass, sized to provide traction between the support unit and the rollers. The mobile rollers can therefore also be designated by the term mobile pinch rollers, or simply pinch rollers. In the cleared position, in contrast, the movable rollers are positioned at second distances, greater than the first distances mentioned above, from the corresponding fixed rollers. The pinch line formed in the engaged position is therefore cleared, and the support unit 204 may be in contact with one or none of the rollers. The moving rollers are passive (i.e. not driven) in the examples discussed below. However, in other examples, one or two of the movable rollers can be driven, in addition to or instead of the fixed rollers 246 and 247.
    As will be discussed below, the support processing device 100 includes other components configured to control the positions of the movable rollers mentioned above with respect to the fixed rollers 246 and 247, and to control the position of print head 228 relative to platen roller 245. Controlling the positions of the movable roller and print head, as will become more apparent in the discussion below, can be used to reduce unwanted displacement of the support unit 204, in particular with respect to the print head 228, when the support unit 204 moves along the support processing path 216.
    Referring to Figure 3, some internal components of the exemplary support processing device 100 shown in Figures 1 and 2 are illustrated. In particular, a print head housing 300 which contains the print head 228 (not visible in Figure 3) is shown, together with an upstream support member 304 and a downstream support member 308 which define parts of the support processing path 216. The upstream support member 304 is designated as "upstream" because it is arranged between the print head 228 (and by extension the print head housing 300) and the input roller 220 mentioned above. The downstream support member 308 is referred to as "downstream" because it is arranged so that the print head 228 is between the downstream support member 308 and the input roller 220. in other words, the downstream support member 308 is further along the support processing path, relative to the input roller 220, than the print head 228.
    The downstream and upstream support elements 304 and 308 can be formed integrally with the housing 104 or can be discrete components which are fixed to the housing 104. The support elements 304 and 308 are typically static and support other components of the support processing device 100, some of which are mobile. Among the components supported by the upstream support member 304 is an upstream drive assembly 310 which includes the upstream stationary roller 246 mentioned above. The upstream fixed roller 246 is mounted for rotation on a shaft 312, which is supported by the upstream support member 304, in the example illustrated. In the present example, the shaft 312 is connected to a motor (not shown), and the upstream fixed roller 246 is therefore designated, in the discussion below, as being the upstream drive roller 246. L upstream drive assembly 310 also includes an upstream nip roller housing (which may also be referred to as a nip roller carriage) 316 which rotatably supports the upstream movable roller (not shown in Figure 3) mentioned above. The upstream nip roller housing 316 is movable between the raised and lowered positions corresponding to the disengaged and engaged positions mentioned above, to disengage and engage the movable roller upstream with the support unit 204, respectively. The upstream nip roller housing 316 is movable between the positions mentioned above, in the present example, by rotation relative to the upstream support member 304, for example around a pivot axis defined by pins mounting 320 which engage with corresponding openings in the support member 304. The downstream support member 308 supports a downstream drive assembly 342, which includes the stationary roller 247 (not shown in Figure 3). In the present example, the fixed roller 247 is driven by a motor (not shown) and the fixed roller 247 is therefore thus designated, in the discussion below, as being the downstream drive roller 247. The assembly downstream drive 324 also includes a downstream nip roller housing 328 which is movable between the raised and lowered positions corresponding to the aforementioned disengaged and engaged positions, for engaging and disengaging a downstream movable roller (not shown ) with the support unit 204. The downstream pinch roller housing 328 is movable by rotation relative to the downstream support member 308, for example around a pivot axis defined by mounting pins 332 which engage with corresponding openings in the support member 308.
    Control of the position of each of the pinch roller housings upstream and downstream 316 and 328 is achieved, in the example illustrated, by the engagement between the pinch roller housings 316 and 328 and a plurality of cam surfaces. The cam surfaces, as will be discussed in more detail below, are implemented on a cam member 336a. The cam member 336a is mounted on a drive shaft 340 which is coupled to an outlet 342 (for example a pinion) of a motor 348 by a transmission segment 344 (a pair of gears, in the present example ). The support processing device 100 includes a control member (not shown) coupled to the motor 348 and configured to control the motor 348 to drive the shaft 340 through a plurality of predefined arcs during the operation of the processing device support 100. As will be discussed below, each predefined arc of the drive shaft 340 places the cam surfaces of the cam member 336a in a predefined position. The position of the support unit 204 along the support processing path 216 is controlled, via the control of another motor (not shown) coupled to the drive rollers 246 and 247, as well as the platinum roller 245. The position of the support unit 204 is controlled in conjunction with the position of the cam member 336a. Consequently, each position of the cam element 336a corresponds to a segment of the support processing path 216 traversed by the support unit 204.
    Referring to Figure 4, a subset of the components of the support processing device 100 illustrated in Figure 3, is shown. Motor 348 and part of transmission segment 344 are omitted, since there are upstream and downstream support members 304 and 308. Upstream drive roller 246, downstream drive roller 247, and the platen roller 245 are visible in FIG. 4. In addition, the pinch roller housings upstream and downstream 316 and 328 are shown as supporting, respectively, an upstream movable roller 400 and a downstream movable roller 404. In the discussion below, the movable rollers 400 and 404 are also designated, respectively, as the upstream nip roller 400 and the downstream nip roller 404.
    The cam element 336a is also illustrated in FIG. 4, as well as an additional cam element 336b mounted on the drive shaft 340. Although two cam elements 336 are shown in the example illustrated , in other examples, one of the cam elements 336 can be omitted. Additionally, the upstream pinch roller housing 316 includes arms (which may also be referred to as cam rollers) 408a and 408b for engaging with a first subset of cam surfaces of the cam members 336a and 336b, respectively. The downstream pinch roller housing 328 includes arms 412a and 412b for engaging a second subset of cam surfaces of the cam members 336a and 336b, respectively. In addition, the print head housing 300 includes arms 416a (shown in Figure 4) and 416b (shown in Figure 5) configured to engage a third subset of the cam surfaces of the cam 336.
    One or both of the upstream and downstream pinch roller housings 316 and 328 are biased toward the engaged positions (i.e., to bias the pinch rollers 400 and 404 toward the path of support processing 216 for engaging the support unit 204). For example, as shown in Figure 4, one or more biasing members 420, such as springs, are coupled to the upstream nip roller housing 316 to engage the upstream support member 304 and bias the Upstream nip roller housing 316 to the media processing path 216.
    Referring to Figure 5, as mentioned above, the arm 416b of the print head housing 300 is illustrated. In addition, Figure 5 illustrates an upstream alignment bar 500 and a downstream alignment bar 504, each configured to align the support unit 204 when the support unit 204 moves past the head. 228. As will be discussed in more detail below, the alignment bars 500 and 504 are configured, in this example, to transition between the engaged and disengaged positions by rotating about the axes pivots 506 and 508 respectively, defined by engagement with the upstream and downstream support members 304 and 308. More specifically, the alignment bars 500 and 504 each include an upright 516 and 520, respectively, configured to engaging with the pinch roller housings upstream and downstream 316 and 328. The engagement between the studs 516 and 520 and the housings 316 and 328, respectively, causes the alignment bars 500 and 504 to perform a e transition between the positions mentioned above in response to the movement of the pinch roller housings 316 and 328.
    As shown in Figure 5, the support processing device 100 may also include a cam position sensor 524, such as a space sensor, configured to detect a tongue or flag 528 on the element cam 336b. The controller mentioned above can, via the signal from the sensor 524, determine the position of the cam elements 336 and therefore select the preconfigured control signals suitable for transmission to the engine 348.
    Referring to Figure 6, the cam elements 336 are illustrated in more detail. In particular, each cam member 336 includes a first subset of cam surfaces 600, a second subset of cam surfaces 604, and a third set of cam surfaces 608. As mentioned above, the first subset cam surfaces 600 is configured to engage with the corresponding arm 408; the second subset of cam surfaces 604 is configured to engage with the corresponding arm 412; and the third subset of cam surfaces 608 is configured to engage with the corresponding arm 416. Each of the above-mentioned subsets of cam surfaces includes a raised surface or lobe, and a lowered surface or base. The shapes and the relative positions of the lobes in each of the subsets 600, 604 and 608 are selected according to the sequence of movement of the pinch roller housings upstream and downstream 316 and 328 and of the print head housing 300 to be carried during the operation of the support processing device 100. The shapes and positions of the cam surfaces are now described in conjunction with the operation of the support processing device 100, with reference to Figures 7 to 11. In each of Figures 7 to 11 , the printhead housing 300 is omitted to illustrate the position of the printhead 228 itself.
    Before the operation of the support processing device 100 processes the support unit 204, the control member mentioned above can be configured to carry out an initialization process in order to place the cam elements 336 in a predetermined initial position. For example, the controller can be configured to determine if the sensor 524 is blocked (by tab 528). When the sensor 524 is obstructed, the control member is configured to cause the advancement of the motor 348 until the sensor 524 is no longer obstructed. The controller can also cause the motor 348 to advance through a predetermined initialization arc (for example a predetermined number of steps) once the sensor 524 is released.
    When the sensor 524 is not obstructed, the control member is configured to drive the motor 348 until the sensor 524 is blocked. The controller is then configured to perform the above process to place the cam members 336 in a known initial or "starting" position. The initial position is shown in Figure 7. In particular, the positions of the lobes of each subset of the cam surfaces 600, 604 and 608 are shown. Due to the engagement between the arms 408 and the sub-assembly 600, the engagement between the arms 412 and the sub-assembly 604, and the engagement between the arms 416 (not shown due to the omitting the print head housing 300) and the subassembly 608, the initial positions are defined by the cam elements 336 for each of the upstream nip roller housing 316, the downstream nip roller housing 328 and the print head 300 (and therefore print head 228). In particular, the upstream nip roller housing 316 is in the raised position, so that the upstream nip roller 400 is lifted away from the media processing path 216. In addition, the print head 228 is also in a raised position, while the downstream nip roller housing 328 is in a lowered position, in which the downstream nip roller 404 is engaged with the downstream drive roller 247 at the processing path of support 216.
    The controller is configured to detect the arrival of a support unit 204 via a signal from a support unit detection sensor (not shown) upstream of the drive roller 246. The support unit 204 is shown by moving towards the print head 228 together with the support processing path 216. In response to the detection of the support unit 204, the controller is configured to drive one or more rollers upstream of the upstream drive roller 246 to propel the support unit 204 toward the upstream drive roller 246. The controller is also configured to drive the motor 348 through an arc predetermined (for example a predetermined number of steps) in order to rotate the cam elements 336 in a second position.
    Referring to Figure 8, the second position of the cam elements is shown following the rotation mentioned above by the motor 348. In particular, the lobes of the sub-assemblies 600, 604 and 608 are driven in rotation counterclockwise. While the print head 228 and the downstream nip roller housing 328 remain in the positions shown in Figure 7, the upstream nip roller housing 316 has transitioned into the lowered or engaged position. The upstream nip roller 400 is therefore in position to engage the support unit 204 when the support unit 204 arrives at the upstream drive roller 246. As will emerge more clearly from FIG. 8, the movement of the upstream nip roller housing 316 is caused by the rotation of the lobes in the first sub-assembly 600 out of engagement with the arms 408, so that the arms 408 rather engage with the base surfaces in subset 600.
    The controller is configured to continue to drive the support unit 204 (including via the drive roller 246) along the support treatment path 216 with the pinch rollers 400 and 404 and the print head 228, in the positions shown in FIG. 8, until the support unit 204 approaches the print head 228. In the present example, the support unit detection sensor is placed in the device 100 so that a trailing edge 800 of the support unit 204 unlocks the support unit detection sensor when the leading edge 804 of the support unit 204 approaches the print head 228. When the support unit 204 approaches the print head 228, the control member is configured to drive the motor 348 through another predetermined arc (which may have the same length or a different length of arcs previously mentioned), to advance the cam elements 336 to the next position in the predefined sequence.
    The position of the support unit 204 when the cam elements 336 are advanced into the following position is shown in FIG. 9. In particular, when the leading edge 804 arrives under the print head 228, the cam elements 336 are rotated to place the subassemblies 600, 604 and 608 in the positions shown in Figure 9. In particular, the print head 228 is lowered into the position to engage the unit carrier 204 and the downstream pinch roller housing 328 is lifted to the disengaged position, so that the downstream pinch roller 414 is lifted away from the support processing path 216. In response to placement of the members cam 336 in the positions shown in Figure 9, the controller can be configured to begin operation of the print head 228, in conjunction with the traction roller 240 and the other components s of the device 100 involved in applying indices on the support unit 204. The controller is configured to continue to drive the support unit 204 beyond the print head 228, when the print head impression 228 applies indices on the support unit 204. When the leading edge 804 of the support unit 204 comes under the downstream drive roller 247, the control member is configured to drive the elements of cam 336 (via motor 348 operation) in the next position in the sequence.
    FIG. 10 illustrates the following position in the sequence, in which all three of the upstream and downstream pinch roller housings 316 and 328 and the print head 228 are lowered. The downstream pinch roller housing 328 is therefore lowered (from the raised position in Figure 9) when the leading edge 804 (not visible in Figure 10) enters the nip thus formed between the roller downstream drive 247 and the pinch roller downstream 404. With the cam members 336 in the positions shown in Figure 10, the controller is configured to continue to drive the support unit 204 along the path of travel. support treatment (for example over a predetermined distance, such as a predetermined number of motor steps at the motor driving the rollers 246, 247 and 245). In response to the trailing edge 800 which approaches the upstream nip roller 400 (for example the above mentioned number of motor steps can be selected to correspond to a displacement distance which places the trailing edge 800 adjacent to the upstream pinch roller 404), the controller is configured to rotate the cam members 336 to the next position in the sequence.
    Figure 11 illustrates the following position in the sequence. Before the trailing edge 800 arrives at the upstream nip roller 404, the cam elements 336 are rotated in order to move the upstream nip roller housing 316 to the released position, while the print head 228 and the downstream pinch roller housing 328 remain in the engaged positions. As observed in FIG. 11, the leading edge 804 has entered the nip formed by the downstream nip roller 404 and the downstream drive roller 247. For this reason, the support unit 204 remains put engaged at two points ((i), the print head 228 and (ii) the downstream pinch roller 404 and the drive roller 247) when the upstream pinch roller 400 emerges from the support 204.
    The controller is configured to continue to drive the support unit 204 until the trailing edge 800 approaches the print head 228. When the trailing edge 800 approaches the print head print 228, the controller is configured to rotate the cam members 336 to the next position in the sequence. The next position in the sequence, as will be clear to those skilled in the art, places the pinch roller housings 316 and 328, as well as the print head 228, in the positions shown in Figure 7. [0048] The controller can be configured to return the support unit 204 by driving past the print head 228, until the above-mentioned card detection sensor is obstructed, without moving the cam elements 336. If a second pass is necessary (for example to apply additional indicia to the support unit 204), the sequence described above is repeated.
    As mentioned previously, the alignment bars 500 and 504 can be configured, in some examples, to transition between the engaged and disengaged positions by rotating about the axes 506 and 508 respectively, in response to the movement of the pinch roller housings 316 and 328. Referring to Figures 12A and 12B, the movement of the alignment bar 500 is described in more detail.
    Referring to Figure 12A, some components of the support processing device 100 are shown with the cam elements 336 in the positions shown in Figure 7. Thus, the pinch roller housing upstream 316 is raised to lift the pinch roller upstream 400 away from the support processing path 216 and the support unit 204. The pinch roller housing 316 comprises a channel for receiving the upright 516. In particular, the channel comprises an inclined wall 1200 , shown in dotted lines in FIG. 12A, configured to engage the upright 516. Thus, when the housing 316 rises, the inclined wall 1200 pushes the upright 516 outward (that is to say at a distance from the center of the support processing path 216). For this reason, a guide plate 1204 of the alignment shifts from a side edge of the support unit 204.
    Referring to Figure 12B, on the other hand, when the pinch roller housing 316 is lowered (as shown in Figure 8), the amount 516 is allowed, thanks to the inclined wall 1200, to move towards the interior, causing the guide plate 1204 to be in contact with the support unit 204. The alignment bar 500 can be biased towards the engaged position shown in FIG. 12B, for example by a biasing element 1208 such as a spring (for example, the other end of which is coupled to the upstream support member 304). Therefore, when the upstream pinch roller housing 316 is raised before engaging the support unit 204, the upstream alignment bar 500 is in the released position to allow easy entry of the support unit. support 204 in the nip intended to be formed by the upstream drive roller 246 and the upstream nip roller 400. When the above nip is engaged with the support unit 204 via the lowering the upstream nip roller housing 316, the upstream alignment bar 500 is also engaged with the support unit 204, to align the support unit 204 with the support processing path 216 before placing engaged with print head 228.
    Referring to Figures 13A and 13B, the operation of the downstream alignment bar 504 will be described in more detail. The downstream pinch roller housing 328 also includes a channel with an inclined surface 1300 configured to engage the upright 520. Thus, when the downstream pinch roller housing 328 is lifted (as in Figure 9) to lift the downstream pinch roller 404 away from the media processing path (and the downstream drive roller 247), the inclined surface 1300 pushes the upright 520 outwards in the position shown in FIG. 13A. A guide plate 1304 of the alignment bar 504 is therefore remote from the support treatment path 216. In other examples, one or the other or the two inclined surfaces 1200 and 1300 can be provided on components coupled to or engaged with the housings 316 and 328, respectively, rather than being an integral part of the housings 316 and 328.
    When the downstream pinch roller housing 328 is lowered to the position shown in Figure 13B (as in Figure 10), the upright 520 moves inward along the inclined surface 1300 and the bar d alignment 504 transitions to the engagement position shown, to align the support unit 204 with the support processing path 216. The alignment bar
    504 can be biased toward the position engaged by a biasing member 1308, such as a spring connected to the downstream support member 308.
    Variants are contemplated with respect to the characteristics of the support processing device 100 discussed above. For example, in other implementations, the upstream and downstream pinch roller housings 316 and 328 may be omitted. The arms 408 and 412 can rather extend from one or more ends of the shafts on which the movable rollers 400 and 404 rotate, for example. In other variants, the movement of the pinch roller housings 316 and 328 can be controlled via different sets of the cams and relative structures described above. For example, the motor 348 can be implemented in the form of one or more linear actuators (for example one or more solenoids) configured to raise or lower one or the other or both housings 316 and 328.
    In other variants, one of the upstream and downstream drive assemblies 310 and 324 is implemented without the movable roller discussed above. That is, one of the upstream and downstream drive assemblies 310 and 324 includes a fixed roller and a movable roller, as described above, while the other of the drive assemblies 310 and 324 includes a pair of fixed rollers. In some embodiments, one or two of the fixed rollers in the drive assembly lacking the movable roller, can (can) be made from a material with a lower hardness than the other roller (or to the rollers of the assembly equipped with a movable roller).
    In this document, relational terms such as first and second (second), upper and lower and the like can be used only to distinguish an entity or action from another entity or action without necessarily needing or implying a such a real order or relationship between these entities or actions. The terms "includes", "comprising", "a", "having", "includes", "including", "contains", "containing" or any of their variants, are intended to cover a non-exclusive inclusion , so that a process, process, article, or apparatus that includes, a, includes, contains a list of items, not only includes those items but may include other items not expressly listed or inherent in such process, process, article or device. An element followed by "includes ... a", "has ... a", "includes ... a", "contains ... a" does not exclude, without further constraints, the existence of additional identical elements in the process, process, article or apparatus which includes, a, includes, contains the element. The term "one" is defined as one or more, unless explicitly stated. The terms "substantially", "essentially", "approximately", "approximately" or any of their versions are defined as being close to what is understood by those skilled in the art, and in one embodiment not limiting, the term is defined to be within the limits of 10%, in another embodiment within the limits of 5%, in another embodiment within the limits of 1% and in another embodiment within the limits 0.5%. The term "coupled" as used here is defined as connected, although not necessarily directly and not necessarily mechanically. A device or structure that is "configured" in a certain way, is configured at least in this way, but can also be configured in other ways that are not listed.
    The above description refers to the block diagrams of the accompanying drawings. The alternative implementations of the examples represented by the block diagrams include one or more additional or alternative elements, processes and / or devices. Additionally or alternatively, one or more of the exemplary block diagrams can be combined, divided, rearranged or omitted. The components represented by the block diagrams are implemented by hardware, software, firmware and / or any combination of hardware, software and / or firmware. In some examples, at least one of the components represented by the diagrams is implemented by a logic circuit. As used here, the term “logic circuit” is expressly defined as being a physical device comprising at least one configured hardware component (for example via the operation according to a predetermined configuration and / or via the execution of instructions readable by stored machine) to control one or more machines and / or perform the operations of one or more machines. Examples of a logic circuit include one or more processors, one or more coprocessors, one or more microprocessors, one or more controllers, one or more digital signal processors (DSP), one or more integrated circuits for specific applications ( ASIC), one or more user-programmable pre-broadcast networks (FPGAs), one or more microcontrollers (MCUs), one or more hardware accelerators, one or more specialized chips, and one or more system on chip (SoC) devices . Certain exemplary logic circuits, such as ASIC or FPGA are hardware specially configured to perform operations (for example one or more of the operations represented by the flowcharts of this disclosure). Some exemplary logic circuits are hardware that executes machine-readable instructions for performing operations (for example, one or more operations represented by the flow diagrams of this disclosure). Some exemplary logic circuits include a combination of specifically configured hardware and hardware that executes machine-readable instructions.
    The above description refers to the flowcharts of the accompanying drawings. The flowcharts are representative of the exemplary processes described here. In some examples, the methods represented by the flowcharts implement the apparatus represented by the block diagrams. Alternative implementations of the exemplary methods described herein may include additional or alternative operations. In addition, the operations of the alternative implementations of the methods described here can be combined, divided, rearranged or omitted. In certain examples, the operations represented by the flowcharts are implemented by the machine-readable instructions (for example software and / or firmware) stored on a medium (for example a medium readable by tangible machine), for execution by a or several of the logic circuits (for example processor (s)). In some examples, the operations represented by the flowcharts are implemented by one or more configurations of one or more specifically designed logic circuits (for example ASIC). In some examples, the operations of the flowcharts are implemented by a combination of specifically designed logic circuit (s) and machine-readable instructions stored on a medium (for example a tangible machine-readable medium) for execution by logic circuit (s).
    As used herein, each of the terms "tangible machine-readable medium", "non-transient machine-readable medium" and "machine-readable storage device" is expressly defined as a storage medium (for example a DON 12 inch hard drive, DVD, compact disc, flash memory, read only memory, random access memory, etc.) on which machine readable instructions (e.g. program code presented by example in the form of software and / or firmware) can be stored. In addition, as used herein, each of the terms "tangible machine-readable medium", "non-transient machine-readable medium" and "machine-readable storage device" is expressly defined to exclude propagation signals. That is, as used in any one of the claims of this patent, none of the terms "tangible machine-readable medium", "non-transient machine-readable medium" and "machine-readable storage device" can be read as being implemented by a propagation signal.
    As used herein, each of the terms "tangible machine-readable medium", "non-transient machine-readable medium" and "machine-readable storage device" is expressly defined as a storage medium on which the instructions machine-readable are stored for any appropriate length of time (e.g. permanently, for an extended period of time, (e.g. while a program associated with machine-readable instructions is executed), and / or a short period of time (for example, while machine-readable instructions are cached and / or during a buffering process)).
    Although certain exemplary devices, methods and articles of manufacture have been described here, the scope of protection of this patent is not limited thereto. On the contrary, this patent covers all the apparatus, processes and articles of manufacture which are rightly within the scope of the claims of this patent.
    权利要求:
    Claims (20)
    [1" id="c-fr-0001]
    1. Support treatment device comprising:
    a platen roller configured to move a media unit along a media processing path to pass through a print head adjacent to the platinum roller;
    an upstream drive assembly comprising (i) a fixed upstream roller disposed along the support processing path on a first side of the platen roller; and (ii) an upstream movable roller adjacent to the upstream fixed roller;
    a downstream drive assembly comprising (i) a fixed downstream roller disposed along the support processing path on a second side of the platen roller; and (ii) a downstream movable roller adjacent to the downstream fixed roller;
    a controller configured to control a motor so that it moves, in a predefined sequence, the upstream movable roller and the movable roller between the respective engaged and disengaged positions.
    [2" id="c-fr-0002]
    2. Support processing device according to claim 1, the control member being configured to control the motor so that it lifts the movable roller upstream in the released position before a trailing edge of the support unit does not cross the fixed roller upstream.
    [3" id="c-fr-0003]
    3. Support processing device according to claim 1, the control member being further configured to control the motor so that it lifts the movable roller downstream in the released position before a leading edge of the support unit does not pass through the fixed roller downstream.
    [4" id="c-fr-0004]
    4. Support processing device according to claim 1, the control member being further configured for:
    in response to the arrival of a leading edge of the support unit at the upstream stationary roller, control the motor to move the upstream movable roller to the engaged position.
    [5" id="c-fr-0005]
    The support processing device according to claim 4, the control member being further configured to control the motor so that it maintains the upstream movable roller in the engaged position until the trailing edge arrives at the level of the fixed roller downstream.
    [6" id="c-fr-0006]
    6. Support processing device according to claim 5, the control member being further configured, in response to the leading edge of the support unit which arrives at the level of the fixed roller downstream, for controlling the motor in order that he:
    moves the movable roller downstream to the engaged position; and lifts the upstream movable roller to the cleared position before a trailing edge of the support unit arrives at the upstream movable roller.
    [7" id="c-fr-0007]
    The support processing device according to claim 1, wherein the upstream drive assembly further comprises an upstream movable roller housing supporting the upstream movable roller; and wherein the downstream drive assembly further includes a downstream movable roller housing supporting the downstream movable roller.
    [8" id="c-fr-0008]
    8. Support treatment device according to claim 7, further comprising:
    an alignment bar biased toward the support treatment path and having an upright extending into engagement with the downstream movable roller housing;
    the downstream movable roller housing having a cam surface for engaging the upright to move the force alignment bar away from the support processing path when the downstream movable roller housing is raised to the released position .
    [9" id="c-fr-0009]
    9. Support treatment device according to claim 7, further comprising:
    an engine output connected to a drive shaft to drive the drive shaft;
    a plurality of cam surfaces mounted on the drive shaft for engaging the upstream movable roller housing and the downstream movable roller housing.
    [10" id="c-fr-0010]
    10. Support treatment device according to claim 8, further comprising:
    a first cam element mounted on the control shaft and comprising a first subset of cam surfaces; and a second cam element mounted on the drive shaft and comprising a second subset of cam surfaces.
    [11" id="c-fr-0011]
    The support processing device according to claim 10, wherein the upstream nip roller housing includes a first arm extending into engagement with the first cam member; and wherein the downstream pinch roller housing includes a second arm extending into engagement with the second cam member.
    [12" id="c-fr-0012]
    The media processing device according to claim 11, wherein the print head is adjacent to the platen roller and movable between an idle position and an active position for engaging the media unit.
    [13" id="c-fr-0013]
    13. Support treatment device according to claim 12, further comprising:
    a third cam member mounted on the pinch roller drive shaft and comprising a third subset of cam surfaces.
    [14" id="c-fr-0014]
    The media processing device according to claim 13, wherein the printhead includes a third arm extending into engagement with the third cam member.
    [15" id="c-fr-0015]
    15. Support processing device according to claim 14, the control member being further configured to control the motor so that it moves the nip roller housing upstream, the print head, and the nip roller housing downstream according to the predetermined sequence for:
    for each of a plurality of steps in the sequence, controlling the motor to advance through a predetermined arc to position the first, second and third cam elements.
    [16" id="c-fr-0016]
    16. Support processing device according to claim 15, in which each predetermined arc is defined by a number of steps.
    [17" id="c-fr-0017]
    17. A support processing device according to claim 1, wherein in the engaged position, the upstream movable roller is at a first distance from the fixed upstream roller to form a nip to put the support unit in take ; and in which in the released position, the upstream movable roller is at a second distance, greater than the first distance, from the fixed upstream roller in order to release the nip line.
    [18" id="c-fr-0018]
    18. A support processing device according to claim 1, wherein in the engaged position, the downstream movable roller is at a first distance from the fixed downstream roller to form a nip to put the support unit in take ; and in which, in the released position, the downstream movable roller is at a second distance, greater than the first distance, from the fixed downstream roller in order to release the nip line.
    [19" id="c-fr-0019]
    19. Support processing device according to claim 1, further comprising:
    a ribbon cassette comprising (i) a supply roller, (ii) a traction roller driven by a traction motor, and (iii) a ribbon configured to pass from the supply roller to the traction roller, crossing the printhead ;
    a rotary sensor coupled to the traction roller;
    the controller being further configured to receive a sensor signal from the rotary sensor indicating a rotational speed of the traction roller, and to modulate an operational parameter of the traction motor based on the sensor signal.
    [20" id="c-fr-0020]
    20. Support processing device according to claim 19, in which the rotary sensor is a quadrature encoder.
    1/13
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    同族专利:
    公开号 | 公开日
    US20190009580A1|2019-01-10|
    CN110869218A|2020-03-06|
    WO2019010027A1|2019-01-10|
    DE112018003449T5|2020-04-09|
    GB2578032A|2020-04-15|
    GB201918605D0|2020-01-29|
    DE112018003449T8|2020-09-03|
    US10843491B2|2020-11-24|
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    法律状态:
    2020-06-23| PLFP| Fee payment|Year of fee payment: 3 |
    2021-06-23| PLFP| Fee payment|Year of fee payment: 4 |
    2021-07-30| PLSC| Publication of the preliminary search report|Effective date: 20210730 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201762529572P| true| 2017-07-07|2017-07-07|
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    US15/951,817|US10843491B2|2017-07-07|2018-04-12|Media unit leveling assembly for media processing devices|
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