CA1124468A - Methode et dispositif de reproduction de disques video a trou central - Google Patents

Methode et dispositif de reproduction de disques video a trou central

Info

Publication number
CA1124468A
CA1124468A CA363,138A CA363138A CA1124468A CA 1124468 A CA1124468 A CA 1124468A CA 363138 A CA363138 A CA 363138A CA 1124468 A CA1124468 A CA 1124468A
Authority
CA
Canada
Prior art keywords
mold half
cooling
molding
sprue
channels
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
CA363,138A
Other languages
English (en)
Inventor
Roy G. Jordan
John R. Holmes
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.)
Discovision Associates
Original Assignee
Discovision Associates
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
Priority claimed from CA310,055A external-priority patent/CA1102973A/fr
Application filed by Discovision Associates filed Critical Discovision Associates
Priority to CA363,138A priority Critical patent/CA1124468A/fr
Application granted granted Critical
Publication of CA1124468A publication Critical patent/CA1124468A/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
    • 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
    • B29L2017/005—CD''s, DVD''s

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
CA363,138A 1977-10-31 1980-10-23 Methode et dispositif de reproduction de disques video a trou central Expired CA1124468A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA363,138A CA1124468A (fr) 1977-10-31 1980-10-23 Methode et dispositif de reproduction de disques video a trou central

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US84736777A 1977-10-31 1977-10-31
US847,367 1977-10-31
CA310,055A CA1102973A (fr) 1977-10-31 1978-08-25 Methode et moyen de reproduire des disques video a ouverture au centre
CA363,138A CA1124468A (fr) 1977-10-31 1980-10-23 Methode et dispositif de reproduction de disques video a trou central

Publications (1)

Publication Number Publication Date
CA1124468A true CA1124468A (fr) 1982-06-01

Family

ID=27165824

Family Applications (1)

Application Number Title Priority Date Filing Date
CA363,138A Expired CA1124468A (fr) 1977-10-31 1980-10-23 Methode et dispositif de reproduction de disques video a trou central

Country Status (1)

Country Link
CA (1) CA1124468A (fr)

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Legal Events

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