FR879072A - Manufacturing process of sound discs - Google Patents

Manufacturing process of sound discs

Info

Publication number
FR879072A
FR879072A FR879072DA FR879072A FR 879072 A FR879072 A FR 879072A FR 879072D A FR879072D A FR 879072DA FR 879072 A FR879072 A FR 879072A
Authority
FR
France
Prior art keywords
manufacturing process
sound discs
discs
sound
manufacturing
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
Other languages
French (fr)
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.)
CELLULOID FABRIK A G DEUTSCHE
Original Assignee
CELLULOID FABRIK A G DEUTSCHE
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 CELLULOID FABRIK A G DEUTSCHE filed Critical CELLULOID FABRIK A G DEUTSCHE
Application granted granted Critical
Publication of FR879072A publication Critical patent/FR879072A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/46—Block or graft polymers prepared by polycondensation of aldehydes or ketones on to macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
    • C08G8/38—Block or graft polymers prepared by polycondensation of aldehydes or ketones onto macromolecular compounds
    • 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

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
FR879072D 1941-02-06 1942-02-05 Manufacturing process of sound discs Expired FR879072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED84290D DE725712C (en) 1941-02-06 1941-02-06 Process for making records

Publications (1)

Publication Number Publication Date
FR879072A true FR879072A (en) 1943-02-12

Family

ID=7064091

Family Applications (1)

Application Number Title Priority Date Filing Date
FR879072D Expired FR879072A (en) 1941-02-06 1942-02-05 Manufacturing process of sound discs

Country Status (3)

Country Link
DE (1) DE725712C (en)
DK (1) DK64994C (en)
FR (1) FR879072A (en)

Also Published As

Publication number Publication date
DE725712C (en) 1942-09-29
DK64994C (en) 1946-11-04

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