US3619449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of manufacturing gramophone records
Assignee: LES INDUSTRIES MUSICALES ET ELECTRIQUES PATHE MARCONI
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Filing: 1967-11-22
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Granted: 1971-11-09
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Expires: 1987-11-22
Abstract
Abstract In injection molding gramophone records, the material is injected into a cavity in which the region forming the transcription band is heated with a region around the periphery being cooled.
Inventors
- 👤 Daniel Berard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:09
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C45/00; B29C45/17; B29C45/26; B29C45/263; B29C45/2642; B29C45/72; B29C45/73; B29C45/7312; B29D; B29D17/00; B29D17/002; B29C2045/735; B29L; B29L2017/00; B29L2017/001; B29L2017/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
A method of molding gramophone records having a transcription band by injection molding in a mold cavity formed between mold parts, including the step of injecting heated moldable material into the mold cavity while a first region in said mold cavity including that forming the said transcription band is being heated and while a second region in said mold cavity adjacent the center thereof is being cooled.
Claim 2
Independent Claim
77 words
A method of molding gramophone records having a transcription band by injection molding in a mold cavity, formed between mold parts, including the step of injecting a heated moldable material into the mold cavity while a first region in said mold cavity including that forming the said transcription band is being heated and while two further regions, one around the periphery of the mold cavity and one adjacent the center of the mold cavity, are being cooled.
Claim 3
Dependent Claim
36 words
A method according to claim 1 in which said second region in the mold cavity comprises an annular zone in the vicinity of the region in which the edges of two mold parts are pressed together.
Claim 4
Dependent Claim
43 words
A method according to claim 2 in which said mold is provided with a central aperture through which moldable material may be injected into said mold cavity and said second region in the mold cavity comprises an annular zone surrounding the injection aperture.
Claim 5
Dependent Claim
51 words
A method according to claim 1 including the steps of cooling said first region in said mold cavity after the step of injecting heated moldable material into the mold cavity and while continuing to cool said second region in said mold cavity, and thereafter separating the molded record from said cavity.
Claim 6
Dependent Claim
51 words
A method according to claim 2 including the steps of cooling said first region in said mold cavity after the step of injecting heated moldable material into the mold cavity and while continuing to cool said second region in said mold cavity, and thereafter separating the molded record from said cavity.
References Cited (Backward Citations)
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US2501823A
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US2642621A
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US2781547A
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US2961699A
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US3294883A
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US3390217A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |