CA1155772A - Appareil de pressage de disques - Google Patents

Appareil de pressage de disques

Info

Publication number
CA1155772A
CA1155772A CA000376597A CA376597A CA1155772A CA 1155772 A CA1155772 A CA 1155772A CA 000376597 A CA000376597 A CA 000376597A CA 376597 A CA376597 A CA 376597A CA 1155772 A CA1155772 A CA 1155772A
Authority
CA
Canada
Prior art keywords
disc
hole
center
molding
mold
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
CA000376597A
Other languages
English (en)
Inventor
Robert W. Chambers
Leslie A. Torrington
Michael L. Mcneely
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of CA1155772A publication Critical patent/CA1155772A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • 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
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
CA000376597A 1980-05-05 1981-04-30 Appareil de pressage de disques Expired CA1155772A (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US14637980A 1980-05-05 1980-05-05
US18716180A 1980-09-15 1980-09-15
US187,161 1980-09-15
US146,379 1988-01-22

Publications (1)

Publication Number Publication Date
CA1155772A true CA1155772A (fr) 1983-10-25

Family

ID=26843845

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000376597A Expired CA1155772A (fr) 1980-05-05 1981-04-30 Appareil de pressage de disques

Country Status (5)

Country Link
CA (1) CA1155772A (fr)
DE (1) DE3116996A1 (fr)
FR (1) FR2481835B1 (fr)
GB (1) GB2075414B (fr)
IT (1) IT1137153B (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298059A (en) * 1964-06-11 1967-01-17 Victor Company Of Japan Press machine for molding records
GB1187968A (en) * 1966-06-24 1970-04-15 Emi Ltd Apparatus for Moulding Gramophone Records.
US3937779A (en) * 1972-05-03 1976-02-10 Emi Limited Moulding of gramophone records

Also Published As

Publication number Publication date
IT8121328A0 (it) 1981-04-22
GB2075414A (en) 1981-11-18
FR2481835B1 (fr) 1985-10-25
DE3116996A1 (de) 1982-02-18
GB2075414B (en) 1984-09-26
IT1137153B (it) 1986-09-03
FR2481835A1 (fr) 1981-11-06

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Legal Events

Date Code Title Description
MKEX Expiry