GB627836A - Improvements in or relating to gramophone records - Google Patents

Improvements in or relating to gramophone records

Info

Publication number
GB627836A
GB627836A GB355446A GB355446A GB627836A GB 627836 A GB627836 A GB 627836A GB 355446 A GB355446 A GB 355446A GB 355446 A GB355446 A GB 355446A GB 627836 A GB627836 A GB 627836A
Authority
GB
United Kingdom
Prior art keywords
per cent
resin
polyvinyl
cellulose
relating
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
GB355446A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB355446A priority Critical patent/GB627836A/en
Priority to ES0179586A priority patent/ES179586A1/en
Publication of GB627836A publication Critical patent/GB627836A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers

Landscapes

  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Gramophone record material comprises a moulded thermoplastic material containing between 7 and 50 per cent by weight of amorphous carbon and no other material apart from mould lubricants and plasticisers. A specified composition comprises 52.3 per cent polyvinyl acetal resin, 43.62 per cent carbon black, .58 per cent calcium stearate, .87 Carnauba wax, 2.63 chlorinated naphthalene. The resin may be replaced by ethyl-cellulose, polyvinyl chloride, the co-polymer of vinyl chloride and vinyl acetate, cellulose acetate, polyvinyl formal or polyethylene. Not more than 30 per cent shellac may be used instead of the resin. Specifications 12035/10, 192,108, [both in Class 70], 615,896 and 620,306, [both in Group XXXVIII], are referred to.
GB355446A 1946-02-05 1946-02-05 Improvements in or relating to gramophone records Expired GB627836A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB355446A GB627836A (en) 1946-02-05 1946-02-05 Improvements in or relating to gramophone records
ES0179586A ES179586A1 (en) 1946-02-05 1947-09-02 PROCEDURE FOR THE MANUFACTURE OF GRAMOPHONE DISCS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB355446A GB627836A (en) 1946-02-05 1946-02-05 Improvements in or relating to gramophone records

Publications (1)

Publication Number Publication Date
GB627836A true GB627836A (en) 1949-08-17

Family

ID=9760531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB355446A Expired GB627836A (en) 1946-02-05 1946-02-05 Improvements in or relating to gramophone records

Country Status (2)

Country Link
ES (1) ES179586A1 (en)
GB (1) GB627836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053207B (en) * 1952-10-21 1959-03-19 Union Carbide Corp vinyl record

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053207B (en) * 1952-10-21 1959-03-19 Union Carbide Corp vinyl record

Also Published As

Publication number Publication date
ES179586A1 (en) 1947-10-16

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