JPS4944083A - - Google Patents

Info

Publication number
JPS4944083A
JPS4944083A JP48077973A JP7797373A JPS4944083A JP S4944083 A JPS4944083 A JP S4944083A JP 48077973 A JP48077973 A JP 48077973A JP 7797373 A JP7797373 A JP 7797373A JP S4944083 A JPS4944083 A JP S4944083A
Authority
JP
Japan
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
JP48077973A
Other versions
JPS5635530B2 (ja
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 filed Critical
Publication of JPS4944083A publication Critical patent/JPS4944083A/ja
Publication of JPS5635530B2 publication Critical patent/JPS5635530B2/ja
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)
  • Thermal Sciences (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (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)
JP7797373A 1972-07-19 1973-07-12 Expired JPS5635530B2 (ja)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
JPS4944083A true JPS4944083A (ja) 1974-04-25
JPS5635530B2 JPS5635530B2 (ja) 1981-08-18

Family

ID=23042423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7797373A Expired JPS5635530B2 (ja) 1972-07-19 1973-07-12

Country Status (5)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153232A (ja) * 1982-03-05 1983-09-12 Toray Ind Inc 磁気記録媒体
JPS60229229A (ja) * 1983-12-22 1985-11-14 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニ− 不透明ポリエステルフイルム基板を有する磁気記録用媒体

Families Citing this family (8)

* 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
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
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

Citations (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
GB838708A (en) * 1956-09-12 1960-06-22 Ici Ltd Improved films and their production
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
JPS4825074A (ja) * 1971-08-05 1973-04-02

Patent Citations (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
GB838708A (en) * 1956-09-12 1960-06-22 Ici Ltd Improved films and their production
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
JPS4825074A (ja) * 1971-08-05 1973-04-02

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153232A (ja) * 1982-03-05 1983-09-12 Toray Ind Inc 磁気記録媒体
JPH024060B2 (ja) * 1982-03-05 1990-01-25 Toray Industries
JPS60229229A (ja) * 1983-12-22 1985-11-14 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニ− 不透明ポリエステルフイルム基板を有する磁気記録用媒体
JPH0375935B2 (ja) * 1983-12-22 1991-12-03 Minnesota Mining & Mfg

Also Published As

Publication number Publication date
FR2192904B1 (ja) 1977-12-23
GB1433344A (en) 1976-04-28
DE2336228A1 (de) 1974-02-07
JPS5635530B2 (ja) 1981-08-18
FR2192904A1 (ja) 1974-02-15
CA1013913A (en) 1977-07-19

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