• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a conveyor device (2) and a welding device (1). In the welding device (1), the conveying device (2) is used with a first conveying means (T1) and a second conveying means (T2), between which the material to be welded is transferred. A control device (3) determines the transfer point and / or the delivery stroke of the second conveyor and controls the funding so that the transfer takes place at the specific location and / or with the specific delivery stroke. Thus, the conversion of the device to various sizes of the weld material can be done quickly.
    公开号:CH712258B1
    申请号:CH00861/07
    申请日:2007-05-30
    公开日:2017-09-29
    发明作者:Schreiber Peter
    申请人:Soudronic Ag；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a conveying device for conveying objects from a first station to a processing station, comprising a first controllable conveying means having a first conveying path, a second controllable conveying means having a second conveying path, wherein the first conveying path and the second conveying path to the Cover part and a subsidized by the first funding item in the coverage area of the conveying paths at a transfer point from the second funding is accepted, and a control device which is connected to the controllable drive means of the funding. Furthermore, the invention relates to a welding device with such a conveying device according to claim 9 and a welding method according to claim 11.
    Devices of the type mentioned are used for example in the manufacture of can bodies for use. The rounded but not yet welded frames are delivered from a rounding device and transported by the first conveyor towards the Zargenschweissstation and delivered at a delivery speed for a transfer to a second funding to the transfer point. The second conveyor conveys the can bodies in the welding station; it is known to be designed with a crank mechanism or a multi-joint system whose acceleration and speed is dependent on the number of cycles of the conveyed frames and whose delivery stroke is substantially constant. The second conveyor transfers the frames to the welding station at a speed substantially equal to the welding speed. The frames are conveyed through the transport of the welding station with a constant speed of welding through this, at the same time the axially aligned edges are welded. When welding a very small distance between successive frames is required and the welding speed is usually smaller or at most equal to the delivery speed of the second conveyor. The transfer between the first conveyor and the second conveyor usually takes place with the aid of a conveyor cam of the second conveyor, which adopts a frame from behind abutment and accelerates this while pushing on a transfer path and delayed after the short acceleration, whereupon the frame from the transport the welding station is taken over and returns the conveyor cam for the acquisition of the next frame to its starting point. In conventional conveyors or Schweißvor-directions a considerable conversion effort is necessary if the size changes (in can bodies, the frame height in horizontally conveyed frames) of the promoted items. The position of the first conveyor of the frame height must be adjusted, resulting in a time-consuming changeover.
    The invention is based on the object to avoid this disadvantage.
    This is achieved according to a first aspect of the invention in the aforementioned conveying device with the characterizing features of claim 1, according to which the transfer point determinable by the control device or an externally determined transfer point is accepted, and the transfer of the funds (T1, T2) during operation of the device is controllable such that it takes place at the specific location.
    Characterized in that the control device can determine the transfer point or can take over an externally determined transfer point and controls the first and second funding so that the transfer point of the particular location corresponds to an adaptation to a changed size of the object in a certain range simple way without the need to change the position or the distance of the first conveyor to the welding station. The determination of the transfer point is carried out in particular as a function of the length of the article in the conveying direction and thus at horizontally promoted frames of the Zargenhöhe. In this case, the delivery stroke of the second conveying means can remain substantially the same for a large area of the frame height.
    According to a further aspect of the invention the object is achieved according to claim 2, characterized in that the second conveying means is provided with a linear conveyor unit and controllably can perform a variable delivery stroke.
    In this way, also the position of the first conveyor for a wide range of Zargenhöhe remain unchanged and the adjustment of the conveyor takes place at substantially constant transfer point on the stroke adjustment.
    Both aspects of the invention may be provided individually or in combination.
    In a welding device, the object is achieved according to claim 9. In a method for welding can bodies, the object with the features of claim 11 is achieved.
    In a preferred embodiment of the conveying device or the welding device and the method is determined by the control device, the transfer point in dependence on the length (BBH) of the article in the conveying direction or by the control device of the delivery stroke (X) in dependence on the Length (BBH) of the object in the conveying direction determinable.
    It is further preferred that the conveying device comprises a first conveying means comprising an electric servo drive with a chain conveyor or a belt conveyor arranged thereon conveyor elements or conveyor cam and the second conveyor comprises a linear conveyor unit with in particular only one driven by this conveyor element.
    Further, it is preferred that the second conveying means comprises a lifting and lowering device, by which a conveying element, in particular a single conveying element, the second conveying means controllable at any point along the delivery stroke is raised and lowered, so that the transfer point by lowering, according to which the conveyor cam can convey the object, in the range of the delivery stroke is freely selectable and the moment of return in the opposite direction of the conveying direction by lifting, whereby the conveyor element can go back past the following object, also in the range of the delivery stroke is freely selectable. It is preferred that the conveying element is displaceable by the linear unit along a linear guide, and that the linear guide can be raised and lowered by a lifting and lowering device. In this case, the linear guide by means of elastically bendable or bendable by at least one hinge holding means can be raised and lowered connected to a fixed part of the conveyor. In another embodiment, the conveying element is arranged on bendable or bendable holding means on a linearly movable part of the linear conveyor unit. In particular, at least one leaf spring can be provided as a bendable holding means.
    Embodiments of the invention will be explained in more detail with reference to the drawings. It shows
    Fig. 1 shows schematically a welding device with a conveyor for explaining the one aspect of the invention;
    Fig. 2 shows schematically a welding device with a conveyor for explaining the other aspect of the invention;
    3 shows a diagram for illustrating different speed profiles of the second conveying means;
    4 shows a first embodiment of the second conveying means in a perspective view;
    5 shows a second embodiment of the second conveying means in a perspective view; and
    6 is a flowchart.
    Fig. 1 shows a highly schematized form a welding device for container frames, especially can bodies. The welding device 1 in this case has a conveying device according to an embodiment of the invention, which comprises the two conveying means T1 and T2. Next, the welding device 1 in a known manner Schweis-selektroden E and E ', which are attached to a not shown upper arm and lower arm of the actual welding station or welding machine. A wire intermediate electrode may be used for welding. In front of the welding plane, which is indicated by the line SE, is located in a known manner a calibration tool, which is indicated by the diabolo rollers 30 and brings in a known manner the weld material or the can bodies in the correct edge position for the welding. The frame calibration D is always located in front of the welding plane SE. The insertion of a can body to be welded into the welding machine or between the welding rollers takes place with the conveying means T2, of which the conveying cam 11 is shown in different positions 11 to 11. This will be explained in more detail below. The first conveying means T1 conveys the welding material until it is taken over by the second conveying means T2. In the example of the welding device shown, the material to be welded, or the rounded can body, is delivered at the exit of a rounding station RA, where it is acted upon by the first conveying means T1 with one of its conveying elements 10, in particular a conveying cam 10. In the example shown, the conveying path of the conveying means 1 is linear and also the conveying path of the conveying means T2 is linear and rectified to the conveying path of the conveying means T1. In other embodiments of the invention, this could also be carried out differently.
    The first conveyor T1 in the preferred embodiment is a chain or belt conveyor with e.g. two parallel chains or belts, on which conveyor cam 10 or conveyor cam pairs are arranged. Their distance from each other in the conveying direction is designated K in the figure. The chains or the belts 6 are driven by a drive 5, which acts on the deflection wheel 7 in the example shown. Further deflection wheels 9 and 8 are arranged adjacent to the welding electrodes and define here for the conveying means T1 whose distance F from the welding plane SE. The drive 5 of the conveying means T1 is preferably an electric servomotor drive and in particular a drive which can be controlled by the controller 3 for starting and stopping and in its speed and possibly its speed profile. The controller 3 is preferably provided with an input 4. The conveying means T1 thus assumes a rounded can body 20 emerging from the rounding station RA and conveys this controlled by the control 3 in the direction of the arrow 21 on a guide, not shown, in the direction of the welding machine or the welding electrodes. The promotion with the conveyor T1 and the respective conveyor cam pairs 10 takes place until the conveyor element 11 of the conveyor T2 takes over the promotion of the can body at a transfer point. The conveying means T2 could also be a circulating, controllable conveying means similar to the conveying means T1. However, the conveyor T2 is preferably a conveyor with a linear conveyor unit and in particular with a single by this linear conveyor back and forth movable conveyor element 11. The corresponding drive is shown schematically at 15 and is also controlled by the controller 3. Linear conveyor units are known in the art and the execution of such is therefore not further explained here, since any, a linear movement of the conveying element effecting, controllable linear conveyor unit is used.
    The controller 3 controls the transfer at the appropriate transfer point between the transport T1 and the transport T2. This can be done in such a way that the controller calculates the suitable transfer point itself by inputting the size of the weld material 20 in the conveying direction via the input 4, in each case the frame height BBH in the example shown. From this Zargenhöhe and the insertion path or delivery stroke X, which is effected by the conveyor T2, the controller from the predetermined kinematics of the two funding T1 and T2 calculate the appropriate transfer point. The transfer point can also be calculated on a separate computer and entered via the input means 4 or by a data connection of the controller 3 with this external computer in the controller. Furthermore, the transfer point can be determined empirically by conveying test frames of the desired frame height by T1 and T2 very slowly or stepwise and the optimum transfer point for this Zargenhöhe at a constant distance from T1 to the welding plane SE by observation determined and input to the controller. If one assumes in a first variant of the invention for the minimum frame height BBH1 to the maximum frame height BBFI2 from a constant insertion path X, which is effected by the conveyor T2 with its delivery stroke, the result for the closest to the welding plane transfer point (for With the fleas BBFH1) the position of the cam of T2 in the distance designated by A from the welding plane SE or in the position shown in solid line and 11 of the cam 11 of T2 and farthest from the welding plane SE away lying transfer point (for frames of height BBH2) the position of the cam, which is designated 11 and corresponds to the distance B. Depending on the height of the frame, which lies between the values BBH1 and BBH2, there results a transfer point lying between these positions 11 and 11 ".It will be apparent to the person skilled in the art how these are dependent on the frame height and the geometrical conditions as illustrated Accordingly, the drives 5 and 15 are then controlled according to the calculated or determined transfer point by the controller 3, so that the conveyor cam 11 of the transport T2 the frame At the transfer point of the respective cam 10 of the conveyor T1 takes over, for example by this is slowed down accordingly and the cam 11 can take over that frame with higher speed, which must be pushed with the insertion path X between the welding rollers T2 initially with a correspondingly higher G speed for takeover and then slows down along the path X to the insertion speed for welding.
    As a preferred embodiment it is further provided that falls below the minimum frame height BBH1, the control or the external computer or the setting empirically executing person sets a variable, here longer, insertion path or delivery stroke X of T2, so that also for lower frame height a transfer from T1 to T2 is possible. Accordingly, of course, when exceeding the maximum frame height BBH2 of the insertion path can also be varied and then a shorter insertion path or delivery stroke X can be selected.
    The speeds of the various funding are, as explained, in function of the frame height BBH, the cam spacing K, the two funding T1 and T2 and the desired insertion path X, and of course the clock rate, ie the number of frames per unit time, calculated or also determined empirically and then saved. This need not be specified here, since this calculation and / or determination due to the geometric conditions for the expert is readily feasible. The control of the drives 5 and 15 is then selected such that the transfer can take place at the appropriate location. The corresponding freedom of movement, which gives the servo drive 5 and results in the linear conveyor unit with its drive 15, allows the corresponding transfer.
    Fig. 2 shows a further schematic representation similar to that of Fig. 1, wherein the same reference numerals again indicate the same elements. Again, it is a welding device for the production of can bodies. The round station RA has the distance H to the welding plane SE. This can be constant depending on the speed profile of the conveyor T1 or can also be adjusted in the basic setting to the desired frame height. The respective frame 20, 20 'and 20 "is also promoted in this example with conveyor cam 10 of the transport means T1 to the transfer point and there delivered to the second conveyor T2 with the conveyor elements 11. In this embodiment, the conveyor T2 with a linear conveyor unit and a The transfer point from T1 to T2 in this embodiment starts from the longest normally occurring frame height BBH2 (frame 20 ") and the minimum delivery stroke X2 of the transport means T2 or the linear conveyor unit determined. This determination of the transfer point can in turn be done mathematically or empirically. In Fig. 2, the transfer point with the conveyor cam 11 and the frame 20 'is indicated. Depending on the frame height, the transfer point may be in front of or (as shown) toward the center of the deflection wheel 9 of the conveying means T1. In the second variant of the invention explained with reference to this exemplary embodiment, the transfer point remains essentially at the same location, and the delivery stroke of the conveying means T2 is made variable as a function of the frame height. This can be seen in the figure by providing the smallest commonly used insertion path or conveying stroke X2 for the normally largest frame height BBH2 or the frame 20 ", if the frame height is reduced to the smallest customary frame height BBH1 The maximum stroke X1 is defined by the available cycle time, the maximum accelerations and velocities, and the minimum frame height For a frame height lying between the frame heights BBH1 and BBH2, a delivery stroke of X2 to X1 corresponding to This can be done by the controller 3 when the frame height is entered into it or the delivery stroke can be input to the controller via input means 4. Also in this embodiment, the delivery stroke can be determined empirically with test margins and a slow or stepwise mode of operation.
    Also in this embodiment, it is additionally possible that when exceeding the frame height BBH2, the transfer point is shifted from T1 to T2 in the direction of the round apparatus. This is indicated in the figure with a frame height BBH3 or a frame 20 "', which exceeds the usually maximum frame height BBH2 and which is taken over at a transfer point, which is shown in the figure with the conveying cam 11"'. This makes it possible even for oversize to dispense with an adjustment of the transport T1 and the distance F, which, as mentioned in the introduction, is very time consuming. Thus, an adjustment of the transfer point takes place according to the example explained with reference to Fig. 1. It can be seen from this that both variants of claims 1 and 2 can occur together or separately, so that the characterizing features of both claims In the embodiment of Fig. 2, in which the horizontal movement of T2 no longer performs a constant stroke, but by a linear conveyor unit allows a variable stroke, thus the position F of the conveyor T1 for a Zargenhöhenbereich, for example, in the size of 50 to 200 millimeters Zargenhöhe be kept constant.
    Fig. 3 illustrates several possible speed curves as a function of time for the conveying movement of the conveyor T2. The acceleration a and the delays a 'and a "and the speeds are chosen so that they are always the same or equal to the number of cycles The takeover of the frame by the conveyor T2 is carried out in the range 0, wherein the delivery speed of the frame by the conveyor T1 must be smaller than the takeover speed of the conveyor T2 The waveforms for the speed in the range Q of the delivery are different selectable, such as For example, in the form of a triangle profile, a trapezoid, as a rounded course, as polynomials, etc. The transfer of the frame to the welding station occurs shortly before the end of the stroke X1 or X2 or intermediate strokes in the area P of Fig. 3. The transfer speed at the welding station is in the range of welding speed The return travel of the conveying cam of the conveying means T2 to its starting point is carried out with the maximum acceleration and speed of the linear conveying unit. Again, different waveforms are possible. For this purpose, the conveyor cam is raised, which will be explained below, so as not to collide with the next frame. In the area of the transfer point of the conveyor cam of the conveyor T2 is lowered with a lifting and lowering device before taking over the frame and this promoted in the manner described to the welding station. There it is calibrated and transferred at the speed according to the welding speed of the welding station. In the area of the front end of the stroke X, the conveyor cam is raised again and returns to the starting point, after which the process is repeated.
    Fig. 4 shows a perspective view of a first embodiment of the conveyor T2, which can operate in the manner described. This conveying means T2 has a machine-mounted linear conveying unit 22, which is basically known to the person skilled in the art and which will not be explained further here. On the carriage or another linearly reciprocating part of the linear conveyor unit 22, a driver 25 is attached, which transmits the carriage movement of the linear conveyor unit to a holder 26 which, guided on linear guides 27 and 28, by the linear conveyor unit back and forth movable and via an intermediate piece 29 carries the conveying element 11, which is here a conveying element with two conveyor cams, so that the frame is conveyed without offset. The entrainment of the holder 26 by the linear conveyor unit takes place via lateral plates 25 ', which are arranged on the driver 25, and form a recess on the driver 25, in which a nose 26' of the holder 26 engages. Thus, the holder 26 is entrained by the linear conveyor unit, but can perform relative to the driver 25 a vertical movement by the nose 26 'between the holding plates 25' is held vertically displaceable. In this way, the lifting and lowering of the conveying element 11 can be carried out by the holder 26 is lifted together with the linear guides 27 and 28 and lowered. These linear guides 27 and 28 are held in holding pieces 31 and 32, which are fastened on the one hand via leaf springs 37 and 36 and on the other hand via leaf springs 34 and 33 on machine-fixed holding blocks 40 and 41. The leaf springs 33-37 allow a vertical movement of the holding pieces 31 and 32 and thus of the conveying element 11. However, they do not allow any movement transversely to the sheet deflection, ie no movement in the direction of the carriage movement of the linear conveyor unit. The deflection of the leaf springs or the holding pieces 31, 32 and thus of the conveying element is effected by an eccentric drive, which has a driven shaft 42 which is mounted in machine-fixed bearing blocks 23 and 24. The shaft 42 is drivable via a drive part, not shown, of the drive 15 of the conveying device or welding device, which is shown in FIGS. 1 and 2 and which is controlled by the controller 3. Of this drive part is shown in Fig. 4, only the timing pulley 43 on the shaft 42, which allows the rotation of this shaft, for example via a servo motor of the otherwise not shown drive 15. Eccentric pieces 44 and 45 are arranged on the end of the shaft 42 and can move the holding pieces 32 and 31 up and down via connecting rods 46 and 47 in accordance with the eccentricity of the pieces 44 and 45, thus bringing about raising and lowering of the conveying element 11. The dimensions and material of the leaf springs 33-37 are chosen so that the maximum permissible stresses in the top and bottom dead center of the eccentric are not exceeded. Through the use of several, spaced apart in a defined distance leaf springs, the conveyor element 11 is always aligned with its two conveyor cam. The leaf springs do not need to be adjusted and are wear-free. Of course, instead of the leaf springs and kinkable holder can be provided with a joint, but this is more complicated than the preferred solution with leaf springs.
    Fig. 5 shows a further embodiment of the second conveyor T2, wherein like reference numerals again denote functionally identical elements. Again, one of the conveyor or welding machine maschi
    权利要求:
    Claims (11)
    [1]
    nenfest arranged linear conveyor unit 22 is provided on the reciprocable carriage, a driver 25 is arranged. Again, machine-fixed bearing blocks 23 and 24 are provided. Eccentrically at bearings in the bearing blocks 23 and 24 arranged eccentric 45 and 44 are by the lifting and lowering drive, which is part of the drive 15, movable, which in turn is indicated by the toothed belt 43. A rotational movement of the wheel 43 moves the linear guide 42 and the bearing housing 54 arranged thereon, in which a bearing displaceable radially and axially on the linear guide 42 is located, in the vertical and lateral direction. The desired vertical movement is transmitted to raise and lower the conveyor cam 11 on this, for which purpose two leaf springs 47 'and 48' are provided, which are arranged parallel and spaced from each other. A Ausbuchten the leaf springs 47 and 48 is prevented by spring elements 50 and 51, which bias the leaf springs. The holder 26, which carries the conveyor element 11 via the intermediate piece 29, is driven by the linear conveyor 22 via the driver 25. By the Mitnehmerplatten, of which in the figure, only the front plate 26 'can be seen, the holder 26 relative to the driver 25 vertically and laterally displaceable and thus by the drive or the eccentrically moving linear guide 42 can be raised and lowered. The holder 26 and thus the conveying element 11 is laterally held by additional leaf springs 33 'and 34' in parallel, which are fixed to the driver 25 of the linear conveyor unit. Fig. 6 shows a flow chart of the procedure in the variant with determination of the transfer point, this being shown in the two last rectangles of the diagram. In the three preceding rectangles for initialization of the welding device 1 with the funding T1 and T2, the minimum height and the maximum height of the frames and the desired production rate is entered, whereupon the controller or an external computer first calculates the position F, which the conveyor T1 in a defined distance brings to the welding plane. Accordingly, the conveyor T1 is then set to the distance F to the welding plane. Subsequently, the calculation or the tentative determination of the transfer point and later the control of the transfer and / or the calculation or determination of X can then take place in accordance with the procedure already explained. According to the aspects of the invention, a conveyor device with a first conveyor and a second conveyor is thus used in a welding device, between which the material to be welded is transferred. A control device determines the transfer point and / or the delivery stroke of the second conveyor and controls the funding so that the transfer takes place at the specific location and / or with the specific delivery stroke. Thus, the conversion of the device to various sizes of the weld material can be done quickly. claims
    1. conveying device for conveying objects (20, 20 ', 20 ") from a first station (RA) to a processing station (E, E'), comprising a first controllable conveying means (T1) with a first conveying path, a second controllable conveying means (T2) with a second conveying path, wherein the first conveying path and the second conveying path cover in part and a subsidized by the first conveyor object in the coverage area of the conveying paths at a transfer point from the second funding is taken over, and a control device (3) with the controllable drive means (5, 15) of the conveying means is connected, characterized in that the transfer point determinable by the control device or an externally determined transfer point is accepted, and the transfer by the conveying means (T1, T2) in the operation of the device is controllable such that it takes place at the specific location and / or the second conveying means (T2) as a linear conveying unit (22) is configured, which is controllable by the control device for executing a controllable variable delivery stroke.
    [2]
    2. Conveying device according to claim 1, characterized in that by the control device (3) the transfer point in dependence on the length (BBH) of the article (20, 20 ', 20 ") in the conveying direction can be determined or that by the control device (3 ) the delivery stroke (X) as a function of the length (BBH) of the article (20, 20 ', 20 ") in the conveying direction can be determined.
    [3]
    3. Conveying device according to one of claims 1 or 2, characterized in that the first conveying means (T1) comprises an electric servo drive (5) as a drive means with a chain conveyor or a belt conveyor (6) arranged thereon with conveying elements (10).
    [4]
    4. Conveying device according to one of claims 1 to 3, characterized in that the second conveying means (T2) comprises a linear conveyor unit (22) as a drive means with only one driven conveying element (11).
    [5]
    5. Conveying device according to one of claims 1 to 4, characterized in that the second conveying means comprises a lifting and lowering device, by which a conveying element (11), in particular a single conveying element (11), the second conveying means controllable at any point along the Delivery stroke is raised and lowered.
    [6]
    6. Conveying device according to one of claims 4 or 5, characterized in that the conveying element (11), along a linear guide (27, 28, 42) is displaceable by the linear conveyor unit, and that the linear guide can be raised and lowered by a lifting and lowering device is.
    [7]
    7. Conveying device according to one of claims 4 to 6, characterized in that the conveying element (11) by means of elastically bendable or articulated by a hinge holding means (33-37; 33 ', 34') liftable and lowerable on a fixed part or on a is arranged linearly displaceable part of the conveying device.
    [8]
    8. Conveying device according to claim 7, characterized in that the holding means are each formed by at least one leaf spring.
    [9]
    9. Welding device (1) for container frames, in particular for can bodies, comprising a rounding station (RA) for the frames and a welding station (E, E ') with Kalibrierwerkzeugmitteln (30) and driven welding rollers and a conveying device according to one of claims 1 to 8 for Promotion of can bodies from the rounding station to the welding station.
    [10]
    10. Welding device according to claim 9, characterized in that by the control device of the insertion path (X) in the welding station by the second conveyor substantially constant and independent of the object length or Zargenhöhe is determined and the adaptation to different object lengths or Zargenhöhen by the Change of the transfer point takes place, and / or that is determined by the control device of the insertion path (X) in the welding station by the second conveyor substantially variable and depending on the object length or Zargenhöhe.
    [11]
    11. A method for welding can bodies, in which the frames of a rounding station (RA) for the frames along a Gesamtförderweges a welding station (E, E ') with Kalibrierwerkzeugmitteln (30) and driven welding rollers are fed, including a conveyor with first and second Conveying means (T1 and T2) is provided with first and second conveying path, between which along the Gesamtförderweges a transfer of the frames takes place, characterized in that the insertion path (X) held in the welding station by the second conveyor substantially constant and independent of the Zargenhöhe and the adjustment to different frame heights is made by the change of the transfer point, and / or that the insertion path (X) in the welding station by the second conveyor substantially variable and depending on the article length or Zargenhöhe is determined.
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    同族专利:
    公开号 | 公开日
    CH712126B1|2017-08-15|
    ES2360560T3|2011-06-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01640/06A|CH712126B1|2006-10-16|2006-10-16|Conveying device for objects and welding device.|EP07020002A| EP1914033B1|2006-10-16|2007-10-12|Conveyor device for objects having different sizes ; Welding device with such a conveyor device ; Process of welding of can bodies having different sizes|
    US11/872,223| US8235202B2|2006-10-16|2007-10-15|Conveying apparatus for objects and welding apparatus with such a conveying apparatus|
    US13/565,070| US8480344B2|2006-10-16|2012-08-02|Conveying apparatus for objects and welding apparatus with such a conveying apparatus|
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