US3961012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making resin impregnated glass fiber article
Assignee: THERMA-TRU HOLDINGS Inc
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Filing: 1975-01-06
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Granted: 1976-06-01
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Expires: 1995-01-06
Abstract
Abstract A method for producing molded reinforced articles by contact molding is disclosed. The improved method involves working a resin-glass fiber composition into a reinforcing mat by rolling across the mat, along a longitudinally-extending axis spaced from the mat, laterally incremental forces to the mat. The forces are applied at different elevations laterally of the mat, depending on the configuration. As the forces are applied to the reinforcing mat, the height of resin flow laterally incrementally of the mat is also controlled.
Inventors
- 👤 Vincent DiMaio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:55
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
170 words
In a method of molding a glass fiber reinforced polyester article including applying a liquid polyester resin and chopped glass fibers to a glass fiber mat on a mold surface and rolling said resin and chopped fibers into the mat and curing said resin, the improvement comprising: performing said rolling step with a roller having plural side-by-side roller segments disposed on a common shaft, each said segment being adapted to allow individual radial displacement of each said segments under rolling conditions, each said segment including a flange portion and a leveling surface portion adjacent to said flange portion, said leveling surface portion having a lesser diameter than said flange portion, said flange portion having a peripheral outer surface, said improvement further comprising contacting said resin and said glass fiber mat with the peripheral surface of each said flange and separately leveling lateral increments of said resin with said leveling surfaces and further permitting each said roller segment to be displaced individually in a direction perpendicular to said mat during rolling.
Claim 2
Dependent Claim
170 words
In a method of molding a glass fiber reinforced polyester article including applying a liquid polyester resin and chopped glass fibers to a glass fiber mat on a mold surface and rolling said resin and chopped fibers into the mat and curing said resin, the improvement comprising: performing said rolling step with a roller having plural side-by-side roller segments disposed on a common shaft, each said segment being adapted to allow individual radial displacement of each said segments under rolling conditions, each said segment including a flange portion and a leveling surface portion adjacent to said flange portion, said leveling surface portion having a lesser diameter than said flange portion, said flange portion having a peripheral outer surface, said improvement further comprising contacting said resin and said glass fiber mat with the peripheral surface of each said flange and separately leveling lateral increments of said resin with said leveling surfaces and further permitting each said roller segment to be displaced individually in a direction perpendicular to said mat during rolling.
Claim 3
Dependent Claim
17 words
A method according to claim 1, including controlling the pressure exerted by each of the contacting surfaces.
References Cited (Backward Citations)
US1612990A
Cited
US2287768A
Cited
US2811745A
Cited
US3425888A
Cited
US3478555A
Cited
US3839532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |