Patent US3645820A successfully refreshed from Google Patents.
US3645820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making flanged-end tubular elements of plastic material
Assignee: Garlock Inc
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Filing: 1970-05-28
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Granted: 1972-02-29
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Expires: 1990-05-28
Abstract
Abstract A flared-in central opening portion of an otherwise flat, plastic, flange element is disposed between and in overlapping relationship with edge portions of cylindrically wound plastic tape, whereafter, the overlapping portions of the tape and flange element are fused to unify them. The wound tape may have a thus associated flange element at either or both ends thereof.
Inventors
- 👤 Michael J Clary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:43
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/04; B65H75/08; B65H75/14; F; F16; F16L; F16L51/00; F16L51/02; F16L51/022; F16L51/024; B65H2701/00; B65H2701/50; B65H2701/51; B65H2701/513; B65H2701/5136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A method according to claim 1 wherein two of said flanged discs are formed and similarly moved into said overlapping and abutting relationship with said sheet at opposite ends of the latter, whereafter the thus assembled wound sheet material and discs are sintered to fuse them together.
Claim 2
Dependent Claim
49 words
A method according to claim 2, wherein, prior to said sintering step, relatively rigid, flat discs of nonplastic material are applied against faces of the plastic discs and glass fiber tape is wound about the wound sheet material to support the latter and said disCs during the sintering step.
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |