FR2192904B1 - - Google Patents

Info

Publication number
FR2192904B1
FR2192904B1 FR7326365A FR7326365A FR2192904B1 FR 2192904 B1 FR2192904 B1 FR 2192904B1 FR 7326365 A FR7326365 A FR 7326365A FR 7326365 A FR7326365 A FR 7326365A FR 2192904 B1 FR2192904 B1 FR 2192904B1
Authority
FR
France
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
FR7326365A
Other languages
French (fr)
Other versions
FR2192904A1 (it
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.)
Celanese Corp
Original Assignee
Celanese Corp
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 Celanese Corp filed Critical Celanese Corp
Publication of FR2192904A1 publication Critical patent/FR2192904A1/fr
Application granted granted Critical
Publication of FR2192904B1 publication Critical patent/FR2192904B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
FR7326365A 1972-07-19 1973-07-18 Expired FR2192904B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27307172A 1972-07-19 1972-07-19

Publications (2)

Publication Number Publication Date
FR2192904A1 FR2192904A1 (it) 1974-02-15
FR2192904B1 true FR2192904B1 (it) 1977-12-23

Family

ID=23042423

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7326365A Expired FR2192904B1 (it) 1972-07-19 1973-07-18

Country Status (5)

Country Link
JP (1) JPS5635530B2 (it)
CA (1) CA1013913A (it)
DE (1) DE2336228A1 (it)
FR (1) FR2192904B1 (it)
GB (1) GB1433344A (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7800122A (nl) * 1978-01-05 1979-07-09 Philips Nv Magnetische registratieband en drager voor een magnetische registratieband.
JPS54107313A (en) * 1978-02-09 1979-08-23 Sony Corp Magnetic recording medium
US4208447A (en) * 1978-06-05 1980-06-17 International Business Machines Corporation Method for disorienting magnetic particles
DE3066823D1 (en) * 1979-06-25 1984-04-12 Teijin Ltd Biaxially oriented wholly aromatic polyester film and process for producing same
US4436894A (en) * 1980-07-31 1984-03-13 Teijin Limited Novel wholly aromatic copolyester, process for production thereof, and film melt-shaped therefrom
JPS58153232A (ja) * 1982-03-05 1983-09-12 Toray Ind Inc 磁気記録媒体
JPS58215722A (ja) * 1982-06-08 1983-12-15 Diafoil Co Ltd 磁気記録体用ポリエステルフイルム
US4508782A (en) * 1983-12-19 1985-04-02 Toray Industries, Inc. Base film for magnetic recording tape with F-5 values of 9-15 Kg/mm2
US4546036A (en) * 1983-12-22 1985-10-08 Minnesota Mining And Manufacturing Company Magnetic recording medium having opaque polyester film base
JPS60127440U (ja) * 1984-02-06 1985-08-27 スズキ株式会社 発動発電機の周波数切換装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US838708A (en) * 1904-08-15 1906-12-18 Robert Gorton Garter.
US2823421A (en) * 1952-05-12 1958-02-18 Du Pont Stretching of polyethylene terephthalate film
IT577841A (it) * 1956-09-12
US3257489A (en) * 1961-11-28 1966-06-21 Du Pont Process for improving gauge of organic, thermoplastic, crystallizable polymeric film by stretching during heat treating
GB1083665A (en) * 1965-03-05 1967-09-20 Ici Ltd Biaxially oriented polyethylene terephthalate films
US3432591A (en) * 1966-10-21 1969-03-11 Du Pont Biaxially oriented heat set film of high molecular weight polyethylene terephthalate
US3627579A (en) * 1969-11-18 1971-12-14 Du Pont Unidirectionally oriented film structure of polyethylene terephthalate
JPS5210909B2 (it) * 1971-08-05 1977-03-26

Also Published As

Publication number Publication date
CA1013913A (en) 1977-07-19
FR2192904A1 (it) 1974-02-15
GB1433344A (en) 1976-04-28
JPS4944083A (it) 1974-04-25
JPS5635530B2 (it) 1981-08-18
DE2336228A1 (de) 1974-02-07

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse