Patent US3619458A successfully refreshed from Google Patents.
US3619458A
Expired / Lapsed
US
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Method of making a gasket
Assignee: Cefilac SA
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Filing: 1969-03-26
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Granted: 1971-11-09
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Expires: 1989-03-26
Abstract
Abstract A method of providing an apertured gasket support with a ring of sealing material encircling said aperture, using a pair of mold parts, each of which has an annular recess in one face thereof connected to a sealing material reservoir, the inner diameter of the recess being greater than that of the aperture, according to which one mold part is positioned on each side of said gasket support with the recesses and aperture aligned and the inner edge of each recess spaced from the edge of the aperture and injecting liquid sealing material into both recesses, while simultaneously clamping the gasket support between the mold parts.
Inventors
- 👤 Jean Alfred Engelhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:46
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14336; B29C2045/14459; B29C2045/1486; B29C2045/14942; Y; Y10; Y10S; Y10S425/00; Y10S425/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
The method claimed in claim 1 in which said mold parts are heated to vulcanize the sealing material in said recesses while said mold parts remain in contact with said gasket support.
Claim 2
Dependent Claim
41 words
The method claimed in claim 1 according to which said mold parts clamp therebetween the portion of said gasket support lying between the edge of said aperture and the inner edge of said recesses while said sealing material is being injected.
References Cited (Backward Citations)
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 |