US4155791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing unidirectionally fiber reinforced resin products
Assignee: Individual
•
Filing: 1977-10-17
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Granted: 1979-05-22
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Expires: 1997-10-17
Abstract
Abstract A method for manufacturing unidirectionally fiber reinforced resin products characterized by application of a given initial tension to the fibers at curing of the resinous material and an apparatus for manufacturing the same which essentially comprises means keeping the fibers under a given tension at curing of the resinous material. With the application of initial tension to the fibers, an initial distortion of the fibers is much reduced and a product of uniform quality and great strength is provided.
Inventors
- 👤 Kenichi Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/8008; B29C53/805; B29C53/8016
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
A method for manufacturing a unidirectionally fiber reinforced synthetic resin product comprising providing a mandrel having two members which are adjustably separatable by means of a shaft member threadedly engaged with one end portion of one of said members and having a flange abutting against said one end portion of one of said members and against one end portion of the other of said members; winding a prepreg sheet comprising fibers impregnated with a resinous material around said mandrel, said fibers being oriented longitudinally with respect to said mandrel; securing one end of said wound sheet to said first member; securing the other end of said wound sheet to said second member; longitudinally separating said two mandrel members using said adjusting means in an amount sufficient to supply a predetermined amount of tension to said fibers; and curing said resin.
Claim 2
Independent Claim
140 words
A method for manufacturing a unidirectionally fiber reinforced synthetic resin product comprising providing a mandrel having two members which are adjustably separatable by means of a shaft member threadedly engaged with one end portion of one of said members and having a flange abutting against said one end portion of one of said members and against one end portion of the other of said members; winding a prepreg sheet comprising fibers impregnated with a resinous material around said mandrel, said fibers being oriented longitudinally with respect to said mandrel; securing one end of said wound sheet to said first member; securing the other end of said wound sheet to said second member; longitudinally separating said two mandrel members using said adjusting means in an amount sufficient to supply a predetermined amount of tension to said fibers; and curing said resin.
Claim 3
Dependent Claim
26 words
A method for manufacturing a unidirectionally fiber reinforced synthetic resin product according to claim 1, which further comprises removing the cured prepreg sheet from the mandrel.
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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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |