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GB828775A - Improvements in or relating to the production of gramophone records - Google Patents

Improvements in or relating to the production of gramophone records

Info

Publication number
GB828775A
GB828775A GB24576/58A GB2457658A GB828775A GB 828775 A GB828775 A GB 828775A GB 24576/58 A GB24576/58 A GB 24576/58A GB 2457658 A GB2457658 A GB 2457658A GB 828775 A GB828775 A GB 828775A
Authority
GB
United Kingdom
Prior art keywords
parts
tablet
gramophone
pulverous
matrices
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
GB24576/58A
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of GB828775A publication Critical patent/GB828775A/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
    • G11B3/705—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers characterised by the selection of the material only
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00—Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • 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
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medicinal Preparation (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

828,775. Gramophone records. DYNAMIT AKTIENGESELLSCHAFT VORM. A., NOBEL & CO. July 30, 1958 [Sept. 27, 1957] No. 24576/58. Class 40 (2). A process for the production of a gramophone record comprises mixing polymeric vinyl chloride, or one or more copolymers thereof, and additives cold, pressing the resulting mixture in the cold into a tablet, and then pressing the tablet at an elevated temperature between matrices to form a gramophone record. Two examples of compositions are given. In the first example polyvinyl chloride powder is mixed in a ball mill with 2% lamp black, 2% pulverous lead stearate, and 20% pulverous root resin and pressed on a known tablet-forming machine after which they are preheated to 140‹ C. and then pressed between matrices for 1 minute at a temperature of 160‹ C. In the second example 80 parts of vinyl chloride and 20 parts of vinyl acetate are formed in an emulsion and stirred in a polymerization vessel in addition to emulsifying agents, dyestuff, 2 parts of phenyl urea and 2 parts of sodium stearate and tablets then prepared as in the first example.
GB24576/58A 1957-09-27 1958-07-30 Improvements in or relating to the production of gramophone records Expired GB828775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED26530A DE1093575B (en) 1957-09-27 1957-09-27 Process for the production of compressible record masses in tablet form

Publications (1)

Publication Number Publication Date
GB828775A true GB828775A (en) 1960-02-24

Family

ID=7038911

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24576/58A Expired GB828775A (en) 1957-09-27 1958-07-30 Improvements in or relating to the production of gramophone records

Country Status (5)

Country Link
BE (1) BE568506A (en)
CH (1) CH364639A (en)
DE (1) DE1093575B (en)
FR (1) FR1213577A (en)
GB (1) GB828775A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267001A (en) * 1979-04-09 1981-05-12 Pic Disc, Inc. Method for making picture records

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876774C (en) * 1951-07-04 1953-05-18 Basf Ag Record masses and records made therefrom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267001A (en) * 1979-04-09 1981-05-12 Pic Disc, Inc. Method for making picture records

Also Published As

Publication number Publication date
DE1093575B (en) 1960-11-24
BE568506A (en)
FR1213577A (en) 1960-04-01
CH364639A (en) 1962-09-30

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