FR2208774A1 - Biaxially stretching thermoplastics sheet - edge beading for transverse stretching is formed after sheet is stretched longitudinally - Google Patents

Biaxially stretching thermoplastics sheet - edge beading for transverse stretching is formed after sheet is stretched longitudinally

Info

Publication number
FR2208774A1
FR2208774A1 FR7336124A FR7336124A FR2208774A1 FR 2208774 A1 FR2208774 A1 FR 2208774A1 FR 7336124 A FR7336124 A FR 7336124A FR 7336124 A FR7336124 A FR 7336124A FR 2208774 A1 FR2208774 A1 FR 2208774A1
Authority
FR
France
Prior art keywords
sheet
stretching
thermoplastics
transverse stretching
stretched longitudinally
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.)
Granted
Application number
FR7336124A
Other languages
French (fr)
Other versions
FR2208774B1 (en
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of FR2208774A1 publication Critical patent/FR2208774A1/en
Application granted granted Critical
Publication of FR2208774B1 publication Critical patent/FR2208774B1/fr
Granted 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
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

An appts. for longitudinally and transversely stretching thermoplastics sheet utilises transverse stretching clamps which grip edge beadings of the sheet. These beadings are produced in the initially flat sheet by a separate beading device incorporated upstream of the transverse stretching section. Pref., the longitudinal stretching is effected by smooth rolls then the sheet passes through the beading device then it is transversely stretched. A heater may be used just upstream of the beading device.
FR7336124A 1972-10-18 1973-10-10 Biaxially stretching thermoplastics sheet - edge beading for transverse stretching is formed after sheet is stretched longitudinally Granted FR2208774A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722251022 DE2251022A1 (en) 1972-10-18 1972-10-18 FILM STRETCHING SYSTEM WITH DEVICES FOR LONGITUDINAL AND TRANSVERSAL STRETCHING OF RAIL-SHAPED THERMOPLASTIC PLASTIC FILMS

Publications (2)

Publication Number Publication Date
FR2208774A1 true FR2208774A1 (en) 1974-06-28
FR2208774B1 FR2208774B1 (en) 1976-06-18

Family

ID=5859379

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7336124A Granted FR2208774A1 (en) 1972-10-18 1973-10-10 Biaxially stretching thermoplastics sheet - edge beading for transverse stretching is formed after sheet is stretched longitudinally

Country Status (3)

Country Link
JP (1) JPS4974271A (en)
DE (1) DE2251022A1 (en)
FR (1) FR2208774A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1443457A (en) * 1965-06-01 1966-06-24 Smith & Nephew Improvement of films and sheets of thermoplastic and the like

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1443457A (en) * 1965-06-01 1966-06-24 Smith & Nephew Improvement of films and sheets of thermoplastic and the like

Also Published As

Publication number Publication date
DE2251022A1 (en) 1974-05-02
JPS4974271A (en) 1974-07-17
FR2208774B1 (en) 1976-06-18

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Legal Events

Date Code Title Description
ST Notification of lapse