GB2247857A - Plastics film with permanent fold - Google Patents

Plastics film with permanent fold Download PDF

Info

Publication number
GB2247857A
GB2247857A GB9016887A GB9016887A GB2247857A GB 2247857 A GB2247857 A GB 2247857A GB 9016887 A GB9016887 A GB 9016887A GB 9016887 A GB9016887 A GB 9016887A GB 2247857 A GB2247857 A GB 2247857A
Authority
GB
United Kingdom
Prior art keywords
adhesive
film
configuration
plastics film
permanent fold
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Withdrawn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
GB9016887A
Other versions
GB9016887D0 (en
Inventor
Robert Christopher Smith
Lloyd Phillip Omundsen
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.)
TRIGON PACKAGING SYSTEMS
Original Assignee
TRIGON PACKAGING SYSTEMS
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 TRIGON PACKAGING SYSTEMS filed Critical TRIGON PACKAGING SYSTEMS
Priority to GB9016887A priority Critical patent/GB2247857A/en
Publication of GB9016887D0 publication Critical patent/GB9016887D0/en
Priority to FR9109704A priority patent/FR2668975A1/en
Priority to SE9102259A priority patent/SE9102259L/en
Priority to DE4125295A priority patent/DE4125295A1/en
Publication of GB2247857A publication Critical patent/GB2247857A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/34—End- or aperture-closing arrangements or devices with special means for indicating unauthorised opening
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0292—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B29C53/06—Forming folding lines by pressing or scoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B29C66/4722—Fixing strips to surfaces other than edge faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/25—Surface scoring
    • 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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/08—Creasing
    • B31F1/10—Creasing by rotary tools
    • 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
    • B65D27/00—Envelopes or like essentially-rectangular containers for postal or other purposes having no structural provision for thickness of contents
    • B65D27/12—Closures
    • B65D27/30—Closures with special means for indicating unauthorised opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8123—Applying strips

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Making Paper Articles (AREA)

Description

4 1 Plastics Film with Permanent Fold I' ' - ...
This invention relates to a method of providing plastics film material with a permanent fold and to a container including a component of plastics film material having a permanent fold provided by the method.
It is known to provide containers of plastics film material with a flap carrying pressure sensitive adhesive wherein a container is closed by folding a flap over a mouth of the container and securing the flap to an opposite facing surface by means of the adhesive. An example of such a container is disclosed in European Patent Application No 90302862.9.
A disadvantage of such closures is that considerable dexterity is required to ensure that a flap is folded neatly and in a correct position. This is of considerable importance with a security envelope since it is important that a flap of the envelope be folded precisely and secured wrinkle free since otherwise evidence of tampering is difficult to determine.
It is desirable. therefore, to provide a closure flap of such a container with a permanent fold by means of which the flap will be folded at a predetermined location and ensure that, when the container is being closed, the flap is perfectly aligned with a corresponding predetermined surface with which it is intended to unite in effecting closure of the container.
2 According to the present invention. a method of providing plastics film material with a permanent fold comprises the steps of subjecting the material to controlled pressure such as to form the material to a configuration including an elongate recess, applying to a surface of the film an adhesive such as to maintain the configuration and removing the pressure. the configuration thereby providing a permanent fold in the material.
Following is a description, by way of example only and with reference to the accompanying drawings, of one method of carrying the invention into effect.
In the drawings:- Figures 1 to 4 inclusive are diagrammatic representations of one embodiment of the method in accordance with the present invention, Figures 5 to 8 inclusive are diagrammatic representations of another embodiment of the method in accordance with the present invention, Figures 9 to 12 inclusive are diagrammatic representations of another embodiment of the method in accordance with the present invention, 3 Figures 13 to 17 are diagrammatic representations of another embodiment of the method in accordance with the present invention and Figures 18 to 22 are diagrammatic representations of another embodiment of the method in accordance with the present Invention.
Referring now to Figures 1 to 4 of the drawings, there is shown a "Creasing" method of providing plastics film material with a permanent fold. According to the method, plastics film material 10 is drawn between a roller 11 having a circumferential groove 12 of "V" shape cross section and a cooperating disc 13 whereby co-operation of the groove 12 and disc 13 creates formation of a rectilinear crease 14 in the film 10 the crease extending downwardly from an upper surface 15 of the film 10. The upper surface 15 then has applied thereto a coating of adhesive 16 which bridges the crease 14 and the adhesive is covered by a cover strip 17 having a coating of silicone on a surface thereof adjacent the adhesive 16 such that the cover strip 17 is peelable from the adhesive 16. The effect of the adhesive coating 16 is such that, on passing from the co- operating roller 11 and disc 13, the groove 12 is maintained in the film 10 by means of the adhesive 16.
it will be appreciated that the permanent crease 14 provides a so-called "dead" fold in the plastics film material 10 such 4 that the material 10 is hinged longitudinally of the crease 14. If, therefore the film 10 is used as a closure flap for a container, the flap is provided with a hinge defined by the crease 14 at a predetermined location such that the flap. when folded to close a container, is positioned accurately with regard to a surface with which it engages in order to effect closure of the container.
Referring now to Figures 5 to 8 of the drawings, there is shown a "Slit/Seal" method wherein plastics film material 18 is folded as shown at 19 and overlapping portions of the material 18 extending from the fold 19 are passed through the nip of a pair of co-operating heated pressure rollers 20,21 thereby forming a crease 22 uniting a layer 23 of the film 18 overlapping a layer 24 of the film and forming an elongate web 25 of the material 18 extending from the crease 22. The web 25 is severed from the crease by a heated cut/seal tool as shown at 26 and the overlapping portion 23 of the film 18 is turned away from the underlying portion 24 as shown in Figure 8. An upper surface 27 of the film 18 has applied thereto an adhesive 28 which bridges the crease 22. The adhesive 28 is covered by a cover strip 29 having a coating of silicone on a surface thereof adjacent the adhesive 28.
Referring now to Figures 9 to 12 of the drawings, there is shown a "Folded/Heat Seal" method which is similar to the method shown in Figures 5 to 8 in that plastics film material 30 is folded as shown at 31, and a portion of the folded material is passed through heated pressure rollers 32,33 thereby providing a web 34 whereby opposite facing portions of the folded film are sealed one to another. However, unlike the method shown in Figures 5 to 8, the web 34 is not severed. The presence of the web 34 united with the layer 35 and the underlying layer 36 of the film 30 provides a permanent crease 37 at the junction of the layers 35, 36 about which the layers 35,36 are foldable relative one to another. The superimposed layer 35 is pivoted relative to the crease 37 such that an upper surface 38 of the film 30 can have applied thereto an adhesive 39 bridging the crease 37. The adhesive is covered by a cover strip 40 having a silicone coating on the surface thereof adjacent the adhesive 39.
Referring now to Figures 13 to 17 of the drawings, there is shown a "Beadee method wherein a film 41 is inserted through the nip of a pair of co-operating pressure rollers 42,43, one of which is provided with a circumferential groove 44 of substantially semicircular configuration, and an elongate polyethylene thread 45 of substantially circular crosssection is laid on an upper surface 46 of the film 41 such as to cooperate with the groove 44 as the film 41 passes through the nip of the rollers 42, 43. on passing from the nip the rollers 42.43 the upper surface 46 of the film 41 has applied thereto adhesive 47 which bridges the groove 44 and the adhesive is covered by a cover strip 48 having on a surface thereof adjacent the adhesive 47 a coating of silicone.
6 Referring now to Figures 18 to 22 of the drawings, there is shown an "Adhesive Creasing" method which is similar to the method shown in Figures 1 to 4 in that a film 49 is fed between a co-operating roller 50 having a groove 51 and a disc 52 whereby the co-operation of the disc 52 and the groove 51 creates a crease 53 in the film 49.
Unlike in the method shown in Figures 1 to 4, however, the "Adhesive Creasing" method shown in Figures 18 to 22 provides for application of two strips of adhesive 54, 55 to an upper surface 56 of the film 49 on either side of the crease 53. The downwardly extending crease then is pinched by pinch rollers (not shown) the effect of which is to draw the material forming the crease 53 downwardly such that opposite facing margins of the portions of adhesive 54,55 are united one with another to form a depending elongate rib 57. The united portions of adhesive 54,55 then have applied thereto a cover strip 58 having a coating of silicone on a surface thereof adjacent the adhesive 54.55.
7

Claims (6)

Claims
1. A method of providing plastics film material with a permanent fold comprising the steps of subjecting the material to controlled pressure such as to form the material to a configuration including an elongate recess. applying to a surface of the film an adhesive such as to maintain the configuration and removing the pressure, the configuration thereby establishing a permanent fold in the material.
2. A method as claimed in Claim 1 wherein subsequent to the adhesive having been applied to the film a release cover strip is applied to the adhesive.
3. A method as claimed in Claim 1 or Claim 2 wherein formation of the configuration is effected by including an elongate member in the recess.
4. A method as claimed in Claim 1 or Claim 2 wherein a portion of the material extending from the recess is removed subsequent to the formation of the configuration.
5. A container including a component of plastics film material having a permanent fold provided by a method as claimed in any one of the preceding Claims.
Published 1992 at The Patent Office. Concept House, Cardiff Road, Newport. Gwent NP9 1111-1. Further copies may be obtained from Sales Branch. Unit
6. Nine Mile Point. Cwrnfelinfach. Cross Keys, Newport. NP1 7RZ- Printed by Multiplex techniques ltd. St Mary Cray. Kent.
GB9016887A 1990-08-01 1990-08-01 Plastics film with permanent fold Withdrawn GB2247857A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9016887A GB2247857A (en) 1990-08-01 1990-08-01 Plastics film with permanent fold
FR9109704A FR2668975A1 (en) 1990-08-01 1991-07-26 METHOD OF MAKING A PERMANENT PLY IN A FILM OF SYNTHETIC MATERIAL AND CONTAINER COMPRISING SUCH A PLI.
SE9102259A SE9102259L (en) 1990-08-01 1991-07-30 PLASTIC FILM WITH PERMANENT FOLD
DE4125295A DE4125295A1 (en) 1990-08-01 1991-07-31 PLASTIC FILM WITH PERMANENT FOLDING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9016887A GB2247857A (en) 1990-08-01 1990-08-01 Plastics film with permanent fold

Publications (2)

Publication Number Publication Date
GB9016887D0 GB9016887D0 (en) 1990-09-12
GB2247857A true GB2247857A (en) 1992-03-18

Family

ID=10679994

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9016887A Withdrawn GB2247857A (en) 1990-08-01 1990-08-01 Plastics film with permanent fold

Country Status (4)

Country Link
DE (1) DE4125295A1 (en)
FR (1) FR2668975A1 (en)
GB (1) GB2247857A (en)
SE (1) SE9102259L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8709187B2 (en) 2002-09-11 2014-04-29 Fisher & Paykel Healthcare Limited Method of forming a conduit

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236948A1 (en) * 1992-11-02 1994-05-05 Hoffmann Hans Guenter Process as well as protective and masking tape for protecting and masking the rubber sealing strips of flush-mounted vehicle windows
DE4309584A1 (en) * 1993-03-24 1994-09-29 Urban Dipl Ing Stricker Blister packs for small-sized products with integrated outer packaging
DE20111227U1 (en) 2001-07-11 2001-10-11 Pfankuch Folien GmbH, 22926 Ahrensburg Envelope made of plastic, especially polypropylene
ITMI20101003A1 (en) * 2010-06-04 2011-12-05 Fra Ser S P A METHOD AND EQUIPMENT FOR PERMANENT FOLDING LINES ON A TEXTILE MANUFACTURE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551090A (en) * 1946-09-06 1951-05-01 Bergstein Robert Morris Knocked down or folding structure made from acetate sheeting or the like
US2524584A (en) * 1949-10-18 1950-10-03 Shellmar Products Corp Method of forming containers
DE1112691B (en) * 1958-12-12 1961-08-10 Alfred Schmermund Method and apparatus for producing a tear-strip-provided web of packaging paper
US3426959A (en) * 1967-01-16 1969-02-11 Jerome H Lemelson Packaging assembly
GB1523933A (en) * 1975-07-10 1978-09-06 Decoflex Ltd Bags
FR2345355A1 (en) * 1976-03-26 1977-10-21 Janowski Valery BAGS OF PLASTIC MATERIAL WITH ADHESIVE CLOSURE OF THE INVIOLABLE TYPE, AND METHODS OF MANUFACTURING THEM
DE3614458A1 (en) * 1986-04-29 1987-11-05 Winkler Duennebier Kg Masch METHOD AND DEVICE FOR GROOVING
CA1334955C (en) * 1988-11-21 1995-03-28 Kenneth R. Makowka Tamper-evident sealing system for envelope and method of making same
CA1329176C (en) * 1989-04-18 1994-05-03 John P. Craig Tamper evident envelope closure system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8709187B2 (en) 2002-09-11 2014-04-29 Fisher & Paykel Healthcare Limited Method of forming a conduit

Also Published As

Publication number Publication date
SE9102259L (en) 1992-02-02
FR2668975A1 (en) 1992-05-15
GB9016887D0 (en) 1990-09-12
SE9102259D0 (en) 1991-07-30
DE4125295A1 (en) 1992-02-06

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)