US4496412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple lap-joint for thermoplastic laminates and method of making the lap-joint
Assignee: Boeing Co
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Filing: 1984-01-03
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Granted: 1985-01-29
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Expires: 2004-01-03
Abstract
Abstract A multiple lap-joint for sheets of thermoplastic laminates, the laminates having edges separated by high temperature removable film separators. The laminate sheets are heated under pressure and formed. The separators are then removed and the feathered edges of two adjoining sheets are interleaved and the sheets are reheated under pressure forming an integrally formed lap-joint.
Inventors
- 👤 James D. Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
B; B31; B31F; B31F7/00; B31F7/006; B29; B29C; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/124; B29C66/1248; B29C66/40; B29C66/41; B29C66/43; B29C66/70; B29C66/72; B29C66/723; B31F5/00; B29L; B29L2009/00; Y; Y10; Y10T; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A method of forming a multiple lap-joint between two sheets of thermoplastic ply laminates, the steps including: inserting high temperature film separators between the edges of the plies of the two laminate sheets; heating and bonding together the plies of the two laminate sheets; removing the film separators from the edges of the two sheets thereby forming feathered edges; interleaving together the feathered edges of the sheets; and reheating and bonding together the feathered edges of the sheets and forming a lap-joint therebetween.
Claim 2
Independent Claim
83 words
A method of forming a multiple lap-joint between two sheets of thermoplastic ply laminates, the steps including: inserting high temperature film separators between the edges of the plies of the two laminate sheets; heating and bonding together the plies of the two laminate sheets; removing the film separators from the edges of the two sheets thereby forming feathered edges; interleaving together the feathered edges of the sheets; and reheating and bonding together the feathered edges of the sheets and forming a lap-joint therebetween.
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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |