EP2463088A2 - Kissenverpackungsmaterialien - Google Patents

Kissenverpackungsmaterialien Download PDF

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Publication number
EP2463088A2
EP2463088A2 EP11192609A EP11192609A EP2463088A2 EP 2463088 A2 EP2463088 A2 EP 2463088A2 EP 11192609 A EP11192609 A EP 11192609A EP 11192609 A EP11192609 A EP 11192609A EP 2463088 A2 EP2463088 A2 EP 2463088A2
Authority
EP
European Patent Office
Prior art keywords
paper
discrete portions
packaging material
array
cushioned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11192609A
Other languages
English (en)
French (fr)
Other versions
EP2463088A3 (de
Inventor
Ronald Jones
Alan Rea
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IPCO Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2463088A2 publication Critical patent/EP2463088A2/de
Publication of EP2463088A3 publication Critical patent/EP2463088A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional [3D] articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional [3D] articles
    • B31D5/0039—Multiple-step processes for making three-dimensional [3D] articles for making dunnage or cushion pads
    • B31D5/006—Multiple-step processes for making three-dimensional [3D] articles for making dunnage or cushion pads including controlled deformation of flat material, e.g. pleating, corrugating or embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional [3D] articles
    • B31D5/0039—Multiple-step processes for making three-dimensional [3D] articles for making dunnage or cushion pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/051—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric

Definitions

  • the present invention relates in general to cushioned paper packing materials and methods of manufacturing such.
  • the present invention relates to envelopes and mailer bags formed using cushioned paper packaging materials.
  • an object can be subject to mechanical stresses that can put the more fragile objects at risk.
  • objects may be wrapped in cushioned packaging materials or alternatively envelopes/bags comprising such materials.
  • cushioned packaging material air cushioned mailers, which are provided with bubble wrap on their interior surface.
  • the bubble wrap provides a cushioning layer which protects the contents of the mailer from mechanical stresses.
  • Bubble wrap is made primarily from plastic, and this tends to increase the manufacture costs of such packaging compared to packaging made solely from paper, for example.
  • cushioned packaging material makes use of corrugated card or paper to provide the required cushioning feature to various types of packaging, including envelopes. Although the use of corrugated card/paper allows for the elimination of plastics from the packaging material, there are disadvantages to its use.
  • the present invention seeks to provide an alternative to the above-mentioned cushioned packaging containers which have lower manufacture costs, are lightweight and can be more easily recycled.
  • the present invention provides a method of manufacturing a cushioned packaging material from paper, said method comprises forming an array of discrete portions across the majority of the surface area of the paper, wherein each of the discrete portions in the array independently extends either above or below the plane of the paper.
  • the array of discrete portions that covers a majority of the paper sheet provides a cushioning effect which, when wrapped around an object, provides a level of protection to such object. It is appreciated that in order for the material to provide an adequate level of protection at least 50% of the surface area of the paper needs to be provided with discrete portions. Although, of course, it is appreciated that greater surface area coverage could further improve the cushioning effect.
  • the array may be formed by embossing the paper with discrete portions.
  • the paper may be selected from the group consisting of: plain paper; chemically treated paper; laminated paper; and metalized paper. It is appreciated that the type of paper used to produce the packaging material of the present invention can be varied to suit the required characteristics of the end product.
  • the paper used to make the packaging material may comprise either a single piece of paper or multiple layers of paper.
  • the paper used to make the packaging material may comprise either a single piece of paper or multiple layers of paper.
  • multiple sheets of lower grade (i.e. lower density or gsm) paper could be used instead a single sheet of high grade (i.e. higher density or gsm) paper.
  • the paper is provided with an array of discrete portions that all extend from the plane of the paper in the same direction.
  • the paper may be provided with an array of discrete portions that alternately extend above and below the plane of the paper. Further preferably, when the discrete portions extend in both directions, the discrete portions may be arranged in an alternating pattern.
  • each discrete portion may be uniform.
  • shape of the discrete portions may be selected from the group consisting of: substantially hemi-spherical; pyramidal, square, triangular, circular, rectangular, and diamond.
  • Other shapes are considered possible within the general concept of the present invention, provided they can be arranged in an array.
  • the method of the present invention further includes the step of treating the paper with a hardening solution, such as starch, either after or before the array of discrete portions has been formed on the paper.
  • a hardening solution such as starch
  • the method may further involve strengthening the cushioned packaging material by affixing an additional layer to the paper.
  • the additional layer may be selected from the group consisting of: paper; plastic; rubber; metal; and fabric.
  • the additional layer can provide the packaging material with additional technical features for more specialized packaging requirements (e.g. water resistance).
  • the present invention also provides a cushioned packaging material comprising paper having an array of discrete portions provided over the majority of the surface area of the paper, and wherein each of the discrete portions independently extends either above or below the plane of the paper.
  • the distance that the discrete portions extend from the plane of the paper may be such that the paper has an effective thickness of at least 2mm.
  • the paper has an effective thickness of at least 2mm.
  • the cushioning effect of the packaging material of the present invention may be increased by using either a single piece of high quality paper (e.g. 90-200gsm), which can sustain more pronounced discrete portions, or a combination of multiple sheets of lower quality paper (e.g. 30-60gsm), which are less capable of retaining discrete portions.
  • a single piece of high quality paper e.g. 90-200gsm
  • a combination of multiple sheets of lower quality paper e.g. 30-60gsm
  • the use of single or multiple layers of paper can be used provide the same overall cushioning effect.
  • a cushioned paper packaging is formed from the packaging material of the present invention.
  • Typical examples of paper packaging include envelopes and mailer bags.
  • Another preferred embodiment of the present invention provides a cushioned paper bag or envelope formed from a cushioning layer and a structural layer fixed in a layered relationship with one another, wherein:
  • the structural layer may be made of paper. It is envisaged that the cushioned paper bag or envelope of the present invention may have additional features. Suitable additional features will become apparent from the detailed description of the present invention.
  • the present invention relates to a paper-based cushioned packaging material and methods of manufacturing such.
  • the cushioning effect of the packaging material is essentially provided by paper - rather than plastic (c.f. bubble wrap) for example - which has been appropriately shaped with an array of individual raised, or indeed lowered, portions that extend from the plane of the paper.
  • the raised (or lowered) portions are arranged across the plane of the paper in an array so as to provide the desired cushioning effect.
  • the packaging material of the present invention is essentially paper based, it is appreciated that additional materials, such as plastic, could be used to supplement the properties of the paper in some situations.
  • Figures 1 to 3 show various arrangements of manufacturing process, each of which can be used to produce one or more of the product variants shown in Figs 4a-7b .
  • a roll of paper 1 provides the stock material from which the cushioned packaging material of the present invention is produced.
  • the paper 1 a provided on the roll 1 can be virgin or recycled plain paper, (i.e. standard untreated paper made from wood pulp).
  • the paper source material may also be pre-treated in some way depending upon what characteristics are required for the finished packaging product.
  • pre-treatment of the source paper include:
  • metalized paper packaging may of particular use when transporting electrical components, for example.
  • the packaging material of the present invention would preferably have an effective thickness of at least 2mm, which is achieved by the discrete portions extending from the plane of the paper.
  • An effective thickness of between 6-8mm is considered more preferable because of the increased cushioning effect it affords.
  • the minimum effective thickness of the packaging material can be achieved by using a single sheet (or ply) of source paper that has a density of around 90-200gsm.
  • the effective thickness can be achieved by using a source paper that comprises multiple sheets (or plies) of lower density paper (e.g. 30-60gsm).
  • the extent to which discrete portions can extend from the plane of the paper can be increased by pretreating the paper, for example by lamination with plastic or spraying with starch.
  • the source paper 1 a is supplied by the paper roll 1.
  • the paper 1 a is shaped with an array of discrete portions and in this embodiment the discrete portions are embossed onto the paper by an embosser 2. It is envisaged that alternative mechanisms for forming the array of discrete portions may be adopted.
  • the embosser 2 shown in Figure 1 comprises two rollers 3 and 4 each of which has a pattern of raised portions and corresponding indentations.
  • rollers 3 and 4 are positioned relative to one another so that, when the rollers come together the raised portions of one roller are received within the indentations on the adjacent roller. In this way, when the rollers come together they impart a pattern of discrete portions which either extend upwards or downwards from the plane of the paper. As the paper passes through the embosser 2 an array of discrete portions is formed on the paper.
  • the embossed paper 5 that exits the embosser 2 therefore has raised discrete portions 5a and lowered discrete portions 5b.
  • the embossed paper 5 is considered to a variant of the cushioned packaging material of the present invention.
  • the embossed paper 5 is sprayed with a starch additive from a dispenser 6 to help strengthen and maintain the discrete portions 5a, 5b.
  • Suitable forms of starch additive include oxidized acetyl and cationic starch; although other suitable forms of hardening additive will be appreciated too.
  • alternative mechanisms for applying the additive to the paper include baths and wet rollers.
  • Figure 2 shows an alternative process for producing cushioned packaging materials of the present invention.
  • a source paper roll 1 supplies a steady supply of paper 1 a, this time to an embosser 7.
  • the exact form of the paper 1 a can vary depending upon what characteristics the finished product needs to have.
  • the embosser 7 shown in Figure 2 has a different arrangement of rollers 8 and 9 to the embosser 2 shown in Figure 1 .
  • the embosser 7 shown in Figure 2 is arranged to form discrete portions that only extend away from the plane of the paper in one direction.
  • one of the rollers is provided with a pattern of raised portions and the other roller is provided with a pattern of corresponding indentations. The rollers are aligned to ensure that the raised portions are receivable within the indentations.
  • embossed paper 10 As the paper 1 a passes through the embosser 7 an array of discrete portions 10a, all of which extend away from the plane of the paper in the same direction, are formed on the embossed paper 10.
  • This embossed paper 10 considered to be an intermediate variant of the packaging material of the present invention and is shown in more detail in Figure 5a and 5b .
  • the embossed paper 10 can provide an effective cushioning effect when applied to high density and/or pre-treated source paper.
  • a dispenser 6 applies a hardening treatment to the embossed paper 10 to help strengthen and maintain the discrete portions 10a. It is appreciated that this step may not be necessary for higher density paper, or indeed paper that has been pre-treated, for example with lamination.
  • the paper 10 After the formation of the array of discrete portions 10a, the paper 10 passes over roller 11 which applies an adhesive to one side of the paper.
  • adhesive can effectively be used, but suitable examples include cold starch glue, PVA glue and EVA glue.
  • the adhesive is applied to the underside of the paper 10a.
  • the underside of the paper is considered to be the opposite side of the paper from which the discrete portions extend and has accessible flat portions. It is intended that the adhesive is primarily applied to the flat portions of the paper 10a.
  • the adhesive is applied to the paper 10 it is brought together with a secondary source of paper 12a, which is supplied by roll 12.
  • the adhesive enables the two paper streams to combine to produce the cushioned paper packaging material 13, which is the variant of the packaging material that is shown in Figures 6a and 6b .
  • the secondary source paper 12a helps to reinforce the structural integrity of the finished product.
  • a suitably shaped roller can be used to ensure that the two sheets 10a, 12a are forced into adhesive contact with one another without flattening the raised discrete portions on sheet 10a.
  • the strengthening function may be alternatively provided by another suitable material.
  • suitable alternatives envisaged by the inventors are plastic, rubber, metal and fabric.
  • Figure 3 shows another alternative process for manufacturing cushioned packaging material of the present invention.
  • the process shown in Figure 3 can be used to produce the variant of cushioned paper packaging material 14 that is shown in 7a and 7b.
  • the arrangement shown in Figure 3 is similar to that shown in Figure 2 in that the roll 1 supplies the source paper 1 a to an embosser 7 which produces embossed paper 10. However in the arrangement shown in Figure 3 a second roll 1' supplies a second source paper 1a' to a second embosser 7' which produces a second stream of embossed paper 10'.
  • the first and the second embossed paper streams are aligned so that, once a suitable adhesive has been applied by roller 11 to at least one of the embossed paper streams, the two streams of embossed paper come together to form a further variant of the cushioned paper packaging material 14 (see Figs. 7a and 7b ).
  • the adhesive is applied to the underside (i.e. the side with accessible flat portions) and the two sheets are forced into adhesive contact by suitably shaped rollers.
  • the alignment of the array of discrete portions formed on the first 10 and second 10' paper stream is such that when the streams come together each discrete portion on the first stream of embossed paper 10 lines up with a corresponding discrete portion on the second stream of embossed paper 10'. In this way a 'bubble' shape is formed at each point where the discrete portions align. Providing the seal formed between the two paper streams is adequate the 'bubbles' can act in a similar way to Bubble Wrap.
  • the variants of the cushioned paper packaging material shown in the Figures all have discrete portions that have a substantially hemi-spherical shape, the discrete portions may have alternative shapes.
  • suitable alternative shapes for the discrete portions include: pyramidal, square, triangular, circular, rectangular and diamond shaped. It is appreciated that any shape that can be embossed on to or in to paper in an array formation would be considered suitable.
  • the finished cushioned packaging material i.e. 5, 13 or 14
  • the packaging material could be rolled up on to a roll (not shown) for easy transport and storage.
  • the packaging material could be formed into specific shapes and sizes, preferably by a die cutting machine, so that the packaging material can be formed into envelopes or mailer bags by an envelope forming machine.
  • the cushioned packaging material 13 in particular, could be used in place of Bubble Wrap in existing Jiffy mailer manufacturing machinery with only minor adaptation of the existing equipment.
  • FIG. 8 An example of an envelope 15 formed from a cushioned packaging material of the present invention is shown in Figure 8 .
  • cushioned paper packaging material that are provided by the present invention that shown in Figure 6a and 6b is considered particularly suitable for the formation of envelopes and/or mailer bags like that shown in Figure 8 .
  • the envelope 15 is formed with the array of discrete portions located on the inner walls of the envelope.
  • the discrete portions thereby combine to provide a cushioned region 16 which helps to protect objects placed within the envelope 15 against mechanical stresses during transit.
  • the external walls of the envelope 17 are provided by the secondary layer of paper 12a (see Figs 6a and 6b ), which gives the envelope it structural integrity. It is envisaged that paper used to provide the external walls of the envelope 17 may be pre-treated to give it improved strength or water resistance, for example.
  • the envelope 15 is preferably formed from two sheets of cushioned paper packaging material which are fixed together along three sides to form the envelope.
  • the two sheets can be fixed together by a range of fixing means, which include: cold starch glue, PVA glue, EVA glue, hot melt, heat sealing and stitching. It is envisaged that further fixing means might also be employed without departing from the scope of the present invention.
  • closure flap 19 Adjacent to the open side of the envelope (i.e. the side where the two sheets of cushioned paper packaging material are not fixed together) is provided a closure flap 19.
  • the closure flap 19 is fixed to one of the sheets using a similar suitable fixing means to those used to fix the sheets of the envelope together (see above).
  • closure flap 19 is provided with at least one adhesive strip 20a, 20b with a peelable cover strip, which enables the closure flap to be secured across the opening of the envelope 15 thus retaining to contents within the envelope 15.
  • the closure flap 15 is provided with more than one adhesive strip ( Figure 8 shows an envelope with two adhesive strips), so that the envelope can be used more than once.
  • cushioned paper packaging material of the present invention can be used to produce a wide variety of envelopes and mailer bags.
  • types of envelopes/mailer bags which might suitably be produced include:
  • cushioning paper packaging material of the present invention is to be used to form envelopes or mailer bags it is envisaged that, rather than completely forming envelopes/mailer bags of standard sizes, two streams of cushioned paper packaging material (e.g. variant 13) could be cut to an appropriate width and then fixed together along the edges thereof to form what is essentially a length of packaging material in a tube. Such tubing could then be stored on a roll and then cut from the roll in appropriate lengths as required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)
  • Making Paper Articles (AREA)
EP11192609A 2010-12-08 2011-12-08 Kissenverpackungsmaterialien Withdrawn EP2463088A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1020749.6A GB2488509B (en) 2010-12-08 2010-12-08 Cushioned packaging materials

Publications (2)

Publication Number Publication Date
EP2463088A2 true EP2463088A2 (de) 2012-06-13
EP2463088A3 EP2463088A3 (de) 2012-08-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11192609A Withdrawn EP2463088A3 (de) 2010-12-08 2011-12-08 Kissenverpackungsmaterialien

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EP (1) EP2463088A3 (de)
GB (1) GB2488509B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021046395A1 (en) * 2019-09-04 2021-03-11 tForm, Inc. Packaging material
EP3981588A1 (de) * 2020-10-07 2022-04-13 Maxpack Enterprises Ltd Mehrschichtiges material
WO2022081755A1 (en) * 2020-10-14 2022-04-21 Facebook Technologies, Llc Paper-based cushion package
EP3995304A1 (de) * 2020-11-05 2022-05-11 Technische Universität Dresden Formteil, polstermittel, kernschicht und verfahren zur herstellung eines formteils
US11440305B2 (en) * 2017-06-26 2022-09-13 David Paul Goodrich Embossed paper in combination with paper cushioning for shipping envelopes
US20230130696A1 (en) * 2020-07-30 2023-04-27 Pratt Corrugated Holdings, Inc. Method of forming a cushioning sheet
WO2023163990A1 (en) * 2022-02-23 2023-08-31 Sealed Air Corporation (Us) Fiber-based cushioned envelopes
WO2024178452A1 (de) * 2023-03-02 2024-09-06 Mondi Ag Verfahren zur herstellung eines verpackungsmaterials und verpackungsmaterial
WO2024178445A1 (en) * 2023-03-02 2024-09-06 Mondi Ag Method for producing a packaging article and a packaging article
US12473134B2 (en) 2020-07-30 2025-11-18 Pratt Corrugated Holdings, Inc. Cushioned mailer

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WO2015050432A1 (en) * 2013-10-03 2015-04-09 Nam Yee Chin Device and method for multiple uses of packaging as well as massaging
DE102022100057A1 (de) 2022-01-03 2023-07-06 Frank Dörmer Verfahren und vorrichtung zur herstellung eines flächigen polstermaterials aus papier, sowie polstermaterial
WO2025254977A1 (en) 2024-06-03 2025-12-11 Pratt Corrugated Holdings, Inc. Insulated shipping assembly

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FR2163311A5 (en) * 1972-12-27 1973-07-20 Fauvel Georges Padded bags or envelopes - contg packing of plastics material
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12533871B2 (en) 2017-06-26 2026-01-27 HexcelPack, LLC Embossed paper in combination with paper cushioning for shipping envelopes
US11440305B2 (en) * 2017-06-26 2022-09-13 David Paul Goodrich Embossed paper in combination with paper cushioning for shipping envelopes
US12023901B2 (en) 2017-06-26 2024-07-02 HexcelPack, LLC Embossed paper in combination with paper cushioning for shipping envelopes
US11981492B2 (en) 2019-09-04 2024-05-14 tForm, Inc. Packaging material
US12515866B2 (en) 2019-09-04 2026-01-06 tForm, Inc. Packaging material
WO2021046395A1 (en) * 2019-09-04 2021-03-11 tForm, Inc. Packaging material
US12043015B2 (en) 2020-07-30 2024-07-23 Pratt Corrugated Holdings, Inc. Method of forming a cushioning sheet
US12466154B2 (en) * 2020-07-30 2025-11-11 Pratt Corrugated Holdings, Inc. Cushioning sheet
US20230130696A1 (en) * 2020-07-30 2023-04-27 Pratt Corrugated Holdings, Inc. Method of forming a cushioning sheet
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GB2488509A (en) 2012-09-05
EP2463088A3 (de) 2012-08-22
GB201020749D0 (en) 2011-01-19

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