• 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 present invention relates to a process for line production of plant growth medium pots comprising the steps of: a) continuously folding the free end of a continuous length of water permeable sheet material, preferably supplied on a reel, into a substantially U-shaped tube; b) forming a first sealing in the U-shaped tube by engaging and flattening theopposed walls of the open end of the U-shaped tube;c) positioning the free end of a growth medium feeding tube within the U-shaped tube cavity, and advancing the continuous length of water permeable sheet material a predefined distance;d) forming a second sealing by engaging and flattening the opposed walls of the Ushaped tube at a predefined distance from the free end of the growth medium feeding tube, thereby forming a tubular chamber around the free end of the growth medium feeding tube;e1) separating the formed tubular chamber from the continuous length of water permeable sheet material; and f) through the free end of the growth medium feeding tube, filling the tubular chamber with a growth medium to form a plant growth medium pot.
    公开号:DK201700415A1
    申请号:DKP201700415
    申请日:2017-07-14
    公开日:2019-03-13
    发明作者:Peter Bilde Hansen Lars
    申请人:Ellepot A/S；
    IPC主号:
    专利说明:

    Process for line production of plant growth medium pots
    Technical field of the invention
    The present invention relates to the production of growth medium pots.
    Background of the invention
    Today, most of the greenhouses applying hydroponic growth of herbs utilize injection moulded plastic pots. This is very problematic, as there is a dramatic increase of plastic waste in general in the world. Furthermore, when the herbs are harvested, the plastic pots are seldom separated from the root and growth medium, and both parts are therefore not recycled.
    Summary of the invention
    It is an object of the present invention to provide an alternative growth medium pot to replace the environmentally unfriendly injection moulded plastic pots.
    Furthermore, it is an object to provide machinery for their production.
    A first aspect relates to a process for line production of plant growth medium pots comprising the steps of:
    a) continuously folding the free end of a continuous length of water permeable sheet material, preferably supplied on a reel, into a substantially U-shaped tube;
    b) forming a first sealing in the U-shaped tube by engaging and flattening the opposed walls of the open end of the U-shaped tube;
    c) positioning the free end of a growth medium feeding tube within the U-shaped tube cavity, and advancing the continuous length of water permeable sheet material a predefined distance;
    d) forming a second sealing by engaging and flattening the opposed walls of the Ushaped tube at a predefined distance from the free end of the growth medium feeding tube, thereby forming a tubular chamber around the free end of the growth medium feeding tube;
    e1) separating the formed tubular chamber from the continuous length of water permeable sheet material; and
    f) through the free end of the growth medium feeding tube, filling the tubular chamber with a growth medium to form a plant growth medium pot.
    DK 2017 00415 A1
    When the terms U-shaped and substantially U-shaped is used to describe the tube, it will be understood that this term is being used in a general sense and that it is not actually required that the middle portion be formed in a continuous curve like the letter U. The U-shaped tube could, for example, be formed with two relatively flat sides like the three sides of a triangle. However, sharp edges should be avoided as they weaken the sheet material. The tube could in principle alternatively be described as an open-sided tube as opposed to the merely defines a tunnel and not a cavity. The presence of a cavity is essential in order to place the growth medium into the tube.
    By using a water permeable sheet material, preferably biodegradable, woven or nonwoven, there is no need for the environmentally unfriendly injection moulded plastic pots. Rather, the water permeable sheet material may be recycled together with the plant roots and growth medium in a composting facility. The sheet material must be water permeable in order for the produced plant pot to be able to absorb water and dissolved nutrients.
    The term “biodegradable” as used herein describes the chemical dissolution of materials by bacteria or other biological means.
    As used herein, the term “nonwoven sheet material” means a sheet material that has a structure of individual fibers or threads, which are interlaid, but not in an identifiable repeating manner. Nonwoven sheet materials may be formed by a variety of processes such as, for example, meltblowing processes, spunbonding processes, coforming processes, airlaying processes, wetlaying processes, and hydroentangling.
    The fibers used for the water permeable sheet material are preferably biodegradable, which can be natural or synthetic fibers, e.g. cellulosic fibers, protein fibers or synthetic polymer fibers. Natural fibers can comprise pulped or shredded cellulose fibers, such as wood pulp, shredded wood, shredded paper (tissue, newsprint and the like), straw, cotton fiber, composted vegetation, fibrous sphagnum moss, peat moss, shredded stalks including shredded corn stalks and shredded
    DK 2017 00415 A1 pine straw (including needles, twigs, cones and small branches). Shredded vegetation is preferably dry before shredding. Protein fibers can e.g. be hair or gelatin. Biodegradable synthetic fibers can comprise reconstituted cellulose fibers, such as rayon fibers, vinyl polymer fibers, such as fibrous polyvinyl alcohol, poly lactic acid, and polyamide fibers.
    The term “cellulosic fibers” as used herein describes fibers made from an organic compound derived primarily from plants such as trees.
    The term “wood pulp fibers” as used herein describes a type of cellulosic fiber made from a lignocellulosic fibrous material prepared by chemically or mechanically separating cellulosic fiber from plants such as trees or cotton.
    The term “regenerated/reconstituted cellulosic fibers” as used herein describes a type of cellulosic fiber made from wood pulp using a solvent fiber spinning process. The process involves dissolving wood pulp in a solvent, and spinning the resultant spinning solution into fibers.
    In one or more embodiments, the biodegradable and water permeable sheet material consist of spunlaced fibers without fiber binding materials. The term spunlaced as used herein refers to a structure of individual fibers or threads, which are physically entangled, without thermal bonding. Physical entanglement may be achieved using a water entanglement process, or alternatively, a needling process or a combination of both processes. The spunlaced fibers provide the strength to the water permeable sheet without the need for a binder, also, and very importantly for the present use, when the water permeable sheet is wet.
    In one or more embodiments, the sealings are made by clamping the U-shaped tube between two welding jaws.
    The first and subsequent sealing in the U-shaped tube is made by engaging the opposed walls of the open end of the U-shaped tube. During the engagement process, the opposed walls may be flattened against one another, or crumbled together.
    DK 2017 00415 A1
    In order for the water permeable sheet material to be sealable, at least some of the fibers should preferably be made from, or coated with, a thermoplastic material. Alternatively, the water permeable sheet material could be coated with a hotmelt composition. Another method for sealing the U-shaped tube may be to emboss the sheet parts together.
    In one or more embodiments, the water permeable sheet material is heat sealable.
    The water permeable sheet material must obviously be advanced during the continuous process. Different means may be used, such as a pair of jaws configured to move in the water permeable sheet material advancement direction during their engagement with the tube. The pair of jaws may be welding jaws configured to make the sealings.
    In one or more embodiments, the continuous length of water permeable sheet material is advanced by moving the free end of the growth medium feeding tube in the water permeable sheet material advancement direction and against the first sealing of the U-shaped tube.
    In one or more embodiments, the first sealing of the U-shaped tube is supported by a resilient backstop during the water permeable sheet material advancement operation. This configuration reduces the risk that the first sealing will break during the water permeable sheet material advancement operation.
    In one or more embodiments, the first and/or second seals of the U-shaped tube are air-cooled prior to the water permeable sheet material advancement operation. This configuration allows for faster production, as the sealings are strengthened rapidly.
    In one or more embodiments, the separation step is performed by dividing the second sealing into two seals, a second and a first seal, by cutting longitudinally therethrough. In this way, the second sealing for a first tubular chamber is prepared simultaneously with a first sealing for the following second tubular chamber.
    DK 2017 00415 A1
    In one or more embodiments, a second sealing for a first tubular chamber is prepared simultaneously with a first sealing for the following second tubular chamber, and wherein the separation step is performed by cutting between said second and first seal.
    In one or more embodiments, the growth medium feeding tube is connected to a growth medium delivering unit comprising:
    - a storage container adapted for holding growth medium, and with an outlet in the bottom wall;
    - a stirrer configured to maintain the growth medium homogeneous in the storage container; and
    - an open-ended dosing chamber configured to move between a first position and a second position; wherein the first open end connects to the outlet of the storage container in the first position, and wherein the second open end connects to the inlet of the growth medium feeding tube in the second position.
    In one or more embodiments, the growth medium feeding tube is connected to a growth medium delivering unit comprising:
    - a storage container adapted for holding growth medium, and with an outlet in the bottom wall;
    - a stirrer configured to maintain the growth medium homogeneous in the storage container; and
    - an open-ended dosing chamber configured to move between a first position and a second position; wherein the first open end connects to the outlet of the storage container in the first position, and wherein the second open end connects to the inlet of the growth medium feeding tube in the second position, while the first open end disconnects from outlet of the storage container, thereby removing a dosage of growth medium from the storage container, through the open-ended dosing chamber, and into the growth medium feeding tube.
    The growth medium delivering unit with a dosing chamber is a new way of thinking within the field of paper pots, where the growth medium is normally delivered into a cylindrical paper tube as a continuous mass (see e.g. WO1992003914). Such a configuration is not possible, when producing a plant pot according to the present
    DK 2017 00415 A1 invention. In order to provide space for making the sealings, the growth medium must be provided into the cavity of the continuously formed U-shaped tube at an oblique or perpendicular angle relative to the cavity. Therefore, the growth medium should be delivered in doses.
    In one or more embodiments, the open-ended dosing chamber is configured as a block with a channel extending therethrough, and wherein the first open end of the channel connects to the outlet of the storage container in the first position, and wherein the second open end of the channel connects to the inlet of the growth medium feeding tube in the second position.
    In one or more embodiments, the block is slidingly engaged with the bottom wall of the of the storage container.
    In one or more embodiments, the open-ended dosing chamber is slidingly engaged with bottom wall of the of the storage container.
    In one or more embodiments, the stirrer is configured to change rotation direction each 2-10 dosing operations. This configuration is to avoid demixing of the growth medium.
    In one or more embodiments, the stirrer paddle blade/head is configured as one or more cylindrical rods extending radially away from the stirrer shaft. This configuration is to avoid demixing of the growth medium.
    In one or more embodiments, the apparatus further comprises a piston configured to move through the first and second open ends of the open-ended dosing chamber when the open-ended dosing chamber is in the second position.
    In one or more embodiments, the process further comprises the step of e2) positioning the tubular chamber into a cell of a growth medium pot tray or into a cell of a revolving unit of an apparatus for compressing growth medium pots, while the upper part of the tubular chamber remains around the free end of the growth medium feeding tube.
    DK 2017 00415 A1
    A second aspect relates to a growth medium pot obtainable by the process according to the present invention.
    A third aspect relates to a growth medium pot made from a single sheet of water permeable sheet material wrapped around a mass or plug of growth medium; wherein the growth medium pot has one closed end formed by said single sheet of water permeable sheet material.
    A fourth aspect relates to an apparatus for use in the process according to the present invention comprising:
    - means adapted for continuously folding the free end of a continuous length of water permeable sheet material, preferably supplied on a reel, into a substantially Ushaped tube;
    - means adapted for forming a first sealing in the U-shaped tube by engaging and flattening the opposed walls of the open end of the U-shaped tube;
    - a growth medium feeding tube;
    - means adapted for positioning the free end of a growth medium feeding tube within the U-shaped tube cavity;
    - means adapted for forming a second sealing by engaging and flattening the opposed walls of the U-shaped tube at a predefined distance from the free end of the growth medium feeding tube, thereby forming a tubular chamber around the free end of the growth medium feeding tube; and
    - cutting means adapted for separating the formed tubular chamber from the continuous length of water permeable sheet material.
    In one or more embodiments, the means adapted for continuously folding the free end of a continuous length of water permeable sheet material into a substantially Ushaped tube comprises a U-shaped profile with a pipe or rod positioned therein such that a U-shaped slot is formed therebetween; wherein the slot is sized and configured to receive a continuous length of water permeable sheet material.
    In one or more embodiments, the means adapted for forming a first and a second sealing are positioned on each side of a slot adapted for receiving the cutting means
    DK 2017 00415 A1 adapted for separating the formed tubular chamber from the continuous length of water permeable sheet material.
    A fifth aspect relates to an apparatus for line production of plant growth medium pots comprising:
    - means adapted for continuously folding the free end of a continuous length of water permeable sheet material, preferably supplied on a reel, into a substantially Ushaped tube;
    - means adapted for forming a first sealing in the U-shaped tube by engaging and flattening the opposed walls of the open end of the U-shaped tube;
    - a growth medium feeding tube;
    - means adapted for positioning the free end of a growth medium feeding tube within the U-shaped tube cavity;
    - means adapted for forming a second sealing by engaging and flattening the opposed walls of the U-shaped tube at a predefined distance from the free end of the growth medium feeding tube, thereby forming a tubular chamber around the free end of the growth medium feeding tube; and
    - cutting means adapted for separating the formed tubular chamber from the continuous length of water permeable sheet material.
    As used in the specification and the appended claims, the singular forms a, an, and the include plural referents unless the context clearly dictates otherwise. Ranges may be expressed herein as from about or approximately one particular value and/or to about or approximately another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent about, it will be understood that the particular value forms another embodiment.
    It should be noted that embodiments and features described in the context of one of the aspects of the present invention also apply to the other aspects of the invention.
    DK 2017 00415 A1
    Brief description of the figures
    Figure 1 shows an apparatus for use in the process in accordance with various embodiments of the invention;
    Figure 2 shows a part of the apparatus members in accordance with various embodiments of the invention;
    Figure 3 shows a sealing means in accordance with various embodiments of the invention;
    Figure 4 shows a growth medium storage container relative to an open-ended dosing chamber in accordance with various embodiments of the invention;
    Figure 5 shows a folding means in accordance with various embodiments of the invention; and
    Figure 6 shows a growth medium pot in accordance with various embodiments of the invention.
    Detailed description of the invention
    Figure 1 shows an apparatus 100 for line production of plant growth medium pots. The apparatus 100 comprises folding means 200 (partly shown), sealing means 300, positioning means (not shown), a growth medium feeding tube 400, and cutting means 500 (Figure 2).
    The folding means 200 (Figure 5) is adapted for continuously folding the free end of a continuous length of water permeable sheet material 10 supplied on a reel 20, into a substantially U-shaped tube (Figure 2). The sealing means 300 is adapted for forming a first sealing in the U-shaped tube 12 by engaging and flattening the opposed walls of the open end of the U-shaped tube 12. The growth medium feeding tube 400 is connected to a growth medium storage container 600 via an open-ended dosing chamber 700 (Figure 4). The positioning means is adapted for positioning the free end 410 (Figure 2) of a growth medium feeding tube 400 within the U-shaped tube cavity. The sealing means 300 is also adapted for forming a
    DK 2017 00415 A1 second sealing by engaging and flattening the opposed walls of the U-shaped tube 12 at a predefined distance (Figure 2, indicated with arrow 14) from the free end 410 of the growth medium feeding tube 400, thereby forming a tubular chamber around the free end 410 of the growth medium feeding tube 400. The cutting means 500 (Figure 2) is adapted for separating the formed tubular chamber from the continuous length of water permeable sheet material 10. As can be seen in Figures 2 and 3, the sealing means 300 adapted for forming a first and a second sealing are positioned on each side of a slot 310 adapted for receiving the cutting means 500 adapted for separating the formed tubular chamber from the continuous length of water permeable sheet material 10. Figure 2 shows only a part of the apparatus members for ease of view. Although the positioning means are not shown directly, an arrow indicates the movement of the entire U-shaped tube. The folding means and positioning means are integrated into one unit, and functions such that the positioning means is configured to lower the folding means relative to the free end 410 of the growth medium feeding tube 400, as the formed tubular chamber is positioned into a cell of a growth medium pot tray or into a cell of a revolving unit 800 (Figure 1) of an apparatus for compressing growth medium pots, while the upper part of the tubular chamber remains around the free end of the growth medium feeding tube. When the growth medium feeding tube 400 returns to the position as shown in Figure 2, the positioning means is configured to raise the folding means relative to the free end 410 of the growth medium feeding tube 400, such that the free end 410 (Figure 2) of the growth medium feeding tube 400 enters the U-shaped tube cavity. The growth medium feeding tube 400 thereby functions as a displacement means, but also as a sheet advancement means, as the continuous length of water permeable sheet material is advanced by moving the free end of the growth medium feeding tube in the water permeable sheet material advancement direction and against the first sealing of the U-shaped tube. During the water permeable sheet material advancement operation, the U-shaped tube is supported by a resilient backstop 900 to avoid braking the sealing.
    In Figure 4, the growth medium storage container 600 is shown relative to the openended dosing chamber 700. The open-ended dosing chamber 700 is configured to move between a first position and a second position with the aid of a pneumatic/hydraulic cylinder 710, as indicated by an arrow. The first open end 720
    DK 2017 00415 A1 connects to the outlet 610 of the storage container 600 in the first position, and wherein the second open end (not shown) connects to the inlet 420 of the growth medium feeding tube 400 in the second position (here shown in the second position), while the first open end 720 disconnects from outlet 610 of the storage container 600, thereby removing a dosage of growth medium from the storage container 600, through the open-ended dosing chamber 700, and into the growth medium feeding tube 400. The apparatus further comprises a piston 730 configured to move through the first 720 and second open ends of the open-ended dosing chamber 700 when the open-ended dosing chamber 700 is in the second position.
    The stirrer paddle blade/head 740 is configured as two cylindrical rods extending radially away from the stirrer shaft. This configuration is to avoid demixing of the growth medium.
    Figure 5 shows the folding means 200 adapted for continuously folding the free end of a continuous length of water permeable sheet material 20 into a substantially Ushaped tube 12. The folding means 200 comprises a substantially U-shaped profile 210 with a pipe or rod 220 positioned therein such that a substantially U-shaped slot 230 is formed therebetween. The slot 230 is sized and configured to receive a continuous length of water permeable sheet material 10.
    An example of a growth medium pot produced by the process of the present invention is shown in Figure 6. Typical pots prepared by the present invention have a diameter of 20-200 mm, and a height of 20-500 mm.
    DK 2017 00415 A1
    References
    Water permeable sheet material
    U-shaped tube
    Arrow indicating a predefined distance
    100 Apparatus
    200 Folding means
    210 U-shaped profile
    220 Pipe or rod
    230 U-shaped slot
    300 Sealing means
    310 Slot
    400 Growth medium feeding tube
    410 Free end of growth medium feeding tube
    420 Inlet
    500 Cutting means
    600 Growth medium storage container
    700 Dosing chamber
    710 Pneumatic/hydraulic cylinder
    720 First open end
    730 Piston
    740 Stirrer paddle blade/head
    800 Revolving unit
    900 Resilient backstop
    权利要求:
    Claims (11)
    [1] Claims
    1. A process for line production of plant growth medium pots comprising the steps of:
    a) continuously folding the free end of a continuous length of water permeable sheet material, preferably supplied on a reel, into a substantially U-shaped tube;
    b) forming a first sealing in the U-shaped tube by engaging and flattening the opposed walls of the open end of the U-shaped tube;
    c) positioning the free end of a growth medium feeding tube within the U-shaped tube cavity, and advancing the continuous length of water permeable sheet material a predefined distance;
    d) forming a second sealing by engaging and flattening the opposed walls of the Ushaped tube at a predefined distance from the free end of the growth medium feeding tube, thereby forming a tubular chamber around the free end of the growth medium feeding tube;
    e1) separating the formed tubular chamber from the continuous length of water permeable sheet material; and
    f) through the free end of the growth medium feeding tube, filling the tubular chamber with a growth medium to form a plant growth medium pot.
    [2] 2. A process according to claim 1, wherein the continuous length of water permeable sheet material is advanced by moving the free end of the growth medium feeding tube in the water permeable sheet material advancement direction and against the first sealing of the U-shaped tube.
    [3] 3. A process according to claim 2, wherein the first sealing of the U-shaped tube is supported by a resilient backstop during the water permeable sheet material advancement operation.
    [4] 4. A process according to any one of the claims 1-3, wherein a second sealing for a first tubular chamber is prepared simultaneously with a first sealing for the following second tubular chamber, and wherein the separation step is performed by cutting between said second and first seal.
    DK 2017 00415 A1
    [5] 5. A process according to any one of the claims 1-4, wherein the growth medium feeding tube is connected to a growth medium delivering unit comprising:
    - a storage container adapted for holding growth medium, and with an outlet in the bottom wall;
    - a stirrer configured to maintain the growth medium homogeneous in the storage container; and
    - an open-ended dosing chamber configured to move between a first position and a second position; wherein the first open end connects to the outlet of the storage container in the first position, and wherein the second open end connects to the inlet of the growth medium feeding tube in the second position.
    [6] 6. A growth medium pot obtainable by the process according to any one of the claims 1-5.
    [7] 7. A growth medium pot made from a single sheet of water permeable sheet material wrapped around a mass or plug of growth medium; characterized in that the growth medium pot has one closed end formed by said single sheet of water permeable sheet material.
    [8] 8. Apparatus (100) for use in the process according to any one of the claims 1-5 comprising:
    - means (200) adapted for continuously folding the free end of a continuous length of water permeable sheet material (10), preferably supplied on a reel (20), into a substantially U-shaped tube (12);
    - means (300) adapted for forming a first sealing in the U-shaped tube (12) by engaging and flattening the opposed walls of the open end of the U-shaped tube (12);
    - a growth medium feeding tube (400);
    - means adapted for positioning the free end (410) of a growth medium feeding tube (400) within the U-shaped tube cavity;
    - means (300) adapted for forming a second sealing by engaging and flattening the opposed walls of the U-shaped tube (12) at a predefined distance from the free end (410) of the growth medium feeding tube (400), thereby forming a tubular chamber around the free end (410) of the growth medium feeding tube (400); and
    DK 2017 00415 A1
    - cutting means (500) adapted for separating the formed tubular chamber from the continuous length of water permeable sheet material (10).
    [9] 9. Apparatus (100) according to claim 8, wherein the means (200) adapted for
    5 continuously folding the free end of a continuous length of water permeable sheet material (20) into a substantially U-shaped tube (12) comprises a substantially Ushaped profile (210) with a pipe or rod (220) positioned therein such that a substantially U-shaped slot (230) is formed therebetween; wherein the slot (230) is sized and configured to receive a continuous length of water permeable sheet
    [10] 10 material (10).
    10. Apparatus (100) according to any one of the claims 8-9, wherein the means (300) adapted for forming a first and a second sealing are positioned on each side of a slot (310) adapted for receiving the cutting means (500) adapted for separating the
    [11] 15 formed tubular chamber from the continuous length of water permeable sheet material (10).
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    同族专利:
    公开号 | 公开日
    DK179671B1|2019-03-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2019-03-13| PAT| Application published|Effective date: 20190115 |
    2019-03-19| PME| Patent granted|Effective date: 20190319 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201700415A|DK179671B1|2017-07-14|2017-07-14|Process for line production of plant growth medium pots|DKPA201700415A| DK179671B1|2017-07-14|2017-07-14|Process for line production of plant growth medium pots|
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