GB2308827B - Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss - Google Patents

Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss

Info

Publication number
GB2308827B
GB2308827B GB9706339A GB9706339A GB2308827B GB 2308827 B GB2308827 B GB 2308827B GB 9706339 A GB9706339 A GB 9706339A GB 9706339 A GB9706339 A GB 9706339A GB 2308827 B GB2308827 B GB 2308827B
Authority
GB
United Kingdom
Prior art keywords
ptfe material
dental floss
forming elongate
particularly dental
material particularly
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.)
Revoked
Application number
GB9706339A
Other versions
GB9706339D0 (en
GB2308827A (en
Inventor
Jacob Moses Blass
John Murray
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.)
Ranir Ltd
Original Assignee
Westone Products 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
Priority claimed from GB9419859A external-priority patent/GB9419859D0/en
Application filed by Westone Products Ltd filed Critical Westone Products Ltd
Priority to GB9807763A priority Critical patent/GB2323538B/en
Priority to GB9706339A priority patent/GB2308827B/en
Publication of GB9706339D0 publication Critical patent/GB9706339D0/en
Publication of GB2308827A publication Critical patent/GB2308827A/en
Application granted granted Critical
Publication of GB2308827B publication Critical patent/GB2308827B/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C15/00—Devices for cleaning between the teeth
    • A61C15/04—Dental floss; Floss holders
    • A61C15/041—Dental floss
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
GB9706339A 1994-10-03 1995-10-02 Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss Revoked GB2308827B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9807763A GB2323538B (en) 1994-10-03 1995-10-02 PTFE dental floss and suture
GB9706339A GB2308827B (en) 1994-10-03 1995-10-02 Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9419859A GB9419859D0 (en) 1994-10-03 1994-10-03 Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss
GB9706339A GB2308827B (en) 1994-10-03 1995-10-02 Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss
PCT/GB1995/002325 WO1996010478A1 (en) 1994-10-03 1995-10-02 Method and apparatus for forming elongate ptfe material and ptfe material particularly dental floss

Publications (3)

Publication Number Publication Date
GB9706339D0 GB9706339D0 (en) 1997-05-14
GB2308827A GB2308827A (en) 1997-07-09
GB2308827B true GB2308827B (en) 1998-12-23

Family

ID=26305724

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9706339A Revoked GB2308827B (en) 1994-10-03 1995-10-02 Method and apparatus for forming elongate PTFE material and PTFE material particularly dental floss
GB9807763A Expired - Fee Related GB2323538B (en) 1994-10-03 1995-10-02 PTFE dental floss and suture

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9807763A Expired - Fee Related GB2323538B (en) 1994-10-03 1995-10-02 PTFE dental floss and suture

Country Status (1)

Country Link
GB (2) GB2308827B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2415906A (en) * 2004-06-16 2006-01-11 Ian Max Dental floss

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134331A1 (en) * 1971-04-28 1972-12-08 Polygest Ag Ptfe web - drawn at high temp to reduce its density
US3953566A (en) * 1970-05-21 1976-04-27 W. L. Gore & Associates, Inc. Process for producing porous products
GB1541681A (en) * 1977-07-13 1979-03-07 Metal Box Co Ltd Drawn polymer articles
US4208745A (en) * 1976-01-21 1980-06-24 Sumitomo Electric Industries, Ltd. Vascular prostheses composed of polytetrafluoroethylene and process for their production
GB2037294A (en) * 1978-11-30 1980-07-09 Sumitomo Electric Industries Porous ptfe structure and process for production thereof
US4277429A (en) * 1976-09-03 1981-07-07 Sumitomo Electric Industries, Ltd. Production of asymmetric porous film materials
EP0076246A1 (en) * 1981-09-24 1983-04-06 Chemiefaser Lenzing Aktiengesellschaft Method of producing monoaxially drawn films of polytetrafluoroethylene
US4817643A (en) * 1987-07-30 1989-04-04 Olson Mary Lou C Chinese finger cuff dental floss
EP0335466A2 (en) * 1988-03-29 1989-10-04 Colgate-Palmolive Company Dental floss

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953566A (en) * 1970-05-21 1976-04-27 W. L. Gore & Associates, Inc. Process for producing porous products
FR2134331A1 (en) * 1971-04-28 1972-12-08 Polygest Ag Ptfe web - drawn at high temp to reduce its density
US4208745A (en) * 1976-01-21 1980-06-24 Sumitomo Electric Industries, Ltd. Vascular prostheses composed of polytetrafluoroethylene and process for their production
US4277429A (en) * 1976-09-03 1981-07-07 Sumitomo Electric Industries, Ltd. Production of asymmetric porous film materials
GB1541681A (en) * 1977-07-13 1979-03-07 Metal Box Co Ltd Drawn polymer articles
GB2037294A (en) * 1978-11-30 1980-07-09 Sumitomo Electric Industries Porous ptfe structure and process for production thereof
EP0076246A1 (en) * 1981-09-24 1983-04-06 Chemiefaser Lenzing Aktiengesellschaft Method of producing monoaxially drawn films of polytetrafluoroethylene
US4817643A (en) * 1987-07-30 1989-04-04 Olson Mary Lou C Chinese finger cuff dental floss
EP0335466A2 (en) * 1988-03-29 1989-10-04 Colgate-Palmolive Company Dental floss

Also Published As

Publication number Publication date
GB9807763D0 (en) 1998-06-10
GB9706339D0 (en) 1997-05-14
GB2308827A (en) 1997-07-09
GB2323538A (en) 1998-09-30
GB2323538B (en) 1999-02-24

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Legal Events

Date Code Title Description
773K Patent revoked under sect. 73(2)/1977