GB1012963A - Improvements in and relating to films of thermoplastic material - Google Patents

Improvements in and relating to films of thermoplastic material

Info

Publication number
GB1012963A
GB1012963A GB2251861A GB2251861A GB1012963A GB 1012963 A GB1012963 A GB 1012963A GB 2251861 A GB2251861 A GB 2251861A GB 2251861 A GB2251861 A GB 2251861A GB 1012963 A GB1012963 A GB 1012963A
Authority
GB
United Kingdom
Prior art keywords
film
cylinder
over
indentations
flame
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.)
Expired
Application number
GB2251861A
Inventor
Arthur Ripon Stephenson
Dennis Milner
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.)
Smith and Nephew PLC
TJ Smith and Nephew Ltd
Original Assignee
Smith and Nephew PLC
TJ Smith and Nephew Ltd
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 Smith and Nephew PLC, TJ Smith and Nephew Ltd filed Critical Smith and Nephew PLC
Priority to GB2251861A priority Critical patent/GB1012963A/en
Publication of GB1012963A publication Critical patent/GB1012963A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet

Abstract

1,012,963. Perforating thermoplastic sheets. T. J. SMITH & NEPHEW Ltd. Sept. 17, 1962 [June 21, 1961], No. 22518/61. Heading B5A. A film of thermoplastic material 11 runs over the surface of a rotating hollow metal cylinder 7, the surface having indentations, and the tip 23 of a flame 22 is applied to the moving film to melt the material over the indentations, but not the material backed by solid metal, to form a perforated film. The cylinder is water cooled and the film under slight tension. In an alternative embodiment, a rotating cylinder cooperates with an endless metal band which bears the indentations, and the film and band pass together over the cylinder while a flame plays on the film. Over a thousand perforations per square inch may be made. Specification 851,473 is referred to.
GB2251861A 1961-06-21 1961-06-21 Improvements in and relating to films of thermoplastic material Expired GB1012963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2251861A GB1012963A (en) 1961-06-21 1961-06-21 Improvements in and relating to films of thermoplastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2251861A GB1012963A (en) 1961-06-21 1961-06-21 Improvements in and relating to films of thermoplastic material

Publications (1)

Publication Number Publication Date
GB1012963A true GB1012963A (en) 1965-12-15

Family

ID=10180674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2251861A Expired GB1012963A (en) 1961-06-21 1961-06-21 Improvements in and relating to films of thermoplastic material

Country Status (1)

Country Link
GB (1) GB1012963A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000387A1 (en) * 1977-07-19 1979-01-24 Maschinenfabrik DORNBUSCH & Co. KG. A method of embossing and perforating thermoplastic films
FR2417389A1 (en) * 1978-02-15 1979-09-14 Unilever Nv LIQUID PERMEABLE FILM
US5202077A (en) * 1990-07-10 1993-04-13 Milliken Research Corporation Method for removal of substrate material by means of heated pressurized fluid stream
US5213742A (en) * 1990-09-11 1993-05-25 Vitaphore Corporation Method of producing pores of controlled geometry on a thermoplastic polymer
US5404626A (en) * 1993-10-25 1995-04-11 Milliken Research Corporation Method and apparatus to create an improved moire fabric by utilizing pressurized heated gas
GB2313338A (en) * 1996-05-23 1997-11-26 British United Shoe Machinery Perforated film for wound dressings
US5865933A (en) * 1996-11-12 1999-02-02 Milliken Research Corporation Method for selectively carving color contrasting patterns in textile fabric
US6635334B1 (en) 2000-08-08 2003-10-21 3M Innovative Properties Company Cloth-like polymeric films
WO2005039840A1 (en) * 2003-10-06 2005-05-06 3M Innovative Properties Company Methods and apparatus for oxygen enriched flame-perforation of a polymer film
US7037100B2 (en) 2002-10-09 2006-05-02 3M Innovative Properties Company Apparatus for flame-perforating films and methods of flame-perforating films
US7138169B2 (en) 2003-03-05 2006-11-21 3M Innovative Properties Company Cloth-like polymeric film with directional tear
WO2021234494A1 (en) 2020-05-19 2021-11-25 3M Innovative Properties Company Porous coated abrasive article and method of making the same

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000387A1 (en) * 1977-07-19 1979-01-24 Maschinenfabrik DORNBUSCH & Co. KG. A method of embossing and perforating thermoplastic films
FR2417389A1 (en) * 1978-02-15 1979-09-14 Unilever Nv LIQUID PERMEABLE FILM
US5202077A (en) * 1990-07-10 1993-04-13 Milliken Research Corporation Method for removal of substrate material by means of heated pressurized fluid stream
US5674581A (en) * 1990-07-10 1997-10-07 Milliken Research Corporation Textile fabric having a thermally modified narrow channel to facilitate separation
US5213742A (en) * 1990-09-11 1993-05-25 Vitaphore Corporation Method of producing pores of controlled geometry on a thermoplastic polymer
US5404626A (en) * 1993-10-25 1995-04-11 Milliken Research Corporation Method and apparatus to create an improved moire fabric by utilizing pressurized heated gas
GB2313338A (en) * 1996-05-23 1997-11-26 British United Shoe Machinery Perforated film for wound dressings
US5865933A (en) * 1996-11-12 1999-02-02 Milliken Research Corporation Method for selectively carving color contrasting patterns in textile fabric
US6635334B1 (en) 2000-08-08 2003-10-21 3M Innovative Properties Company Cloth-like polymeric films
US7037100B2 (en) 2002-10-09 2006-05-02 3M Innovative Properties Company Apparatus for flame-perforating films and methods of flame-perforating films
US7686996B2 (en) 2002-10-09 2010-03-30 3M Innovative Properties Company Methods for flame-perforating films
US7980849B2 (en) 2002-10-09 2011-07-19 3M Innovative Properties Company Apparatus and method for flame-perforating films
US7138169B2 (en) 2003-03-05 2006-11-21 3M Innovative Properties Company Cloth-like polymeric film with directional tear
WO2005039840A1 (en) * 2003-10-06 2005-05-06 3M Innovative Properties Company Methods and apparatus for oxygen enriched flame-perforation of a polymer film
US7160095B2 (en) 2003-10-06 2007-01-09 3M Innovative Properties Company Apparatus for oxygen enriched flame-perforation of a polymer film
US7402033B2 (en) 2003-10-06 2008-07-22 3M Innovative Properties Company Apparatus for oxygen enriched flame-perforation of a polymer film
CN100532032C (en) * 2003-10-06 2009-08-26 3M创新有限公司 Methods and apparatus for oxygen enriched flame-perforation of a polymer film
US7622064B2 (en) 2003-10-06 2009-11-24 3M Innovative Properties Company Methods and apparatus for oxygen enriched flame-perforation of a polymer film
WO2021234494A1 (en) 2020-05-19 2021-11-25 3M Innovative Properties Company Porous coated abrasive article and method of making the same

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