Patent US3654028A successfully refreshed from Google Patents.
US3654028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making filament reinforced a-stage profiles
Assignee: WILLIAM B GOLDSWORTHY
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Filing: 1969-10-13
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Granted: 1972-04-04
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Expires: 1989-10-13
Abstract
Abstract Fiberglass filament unwound from a series of spools is impregnated with a resin matrix and passed through a pair of rollers or sizing bushing for removing the excess resin and air therefrom. The resin impregnated fiberglass is then envelopely enclosed within a sheet of unidirectionally oriented plastic film, the latter being sealed along its upper longitudinal margin by means of an ultrasonic weld or heat weld. The film enclosed composite may then be heated to shrink the film. The temperature should be sufficiently low to have no curing effect on the resin leaving it in the uncured or so-called ''''A-stage.'''' For some systems, it is desirable to advance the resin to a semicured or so-called ''''B-stage.'''' The film enclosed composite may then be wound upon suitable reels and stored for further use.
Inventors
- 👤 William B Goldsworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:14
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/525; B29C70/527; B26; B26D; B26D1/00; B26D1/01; B26D1/04; B29C31/00; B29C31/002; B29C63/00; B29C63/02; B29C63/04; B29C63/06; B29C63/065; B29C63/38; B29C63/40; B29C67/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
19 words
The apparatus of claim 1 further characterized in that the peripheral margins are the longitudinal margins of said film.
Claim 2
Dependent Claim
23 words
The apparatus of claim 1 further characterized in that the film is a unidirectionally oriented film capable of being shrunk in one dimension.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 further characterized in that the film is a unidirectionally oriented film capable of being shrunk in a direction transverse to the longitudinal axis of said filament.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 further characterized in that mEans is provided for removing the excess resin from said filament.
Claim 5
Dependent Claim
23 words
The apparatus of claim 1 further characterized in that the means for sealing the margins of the film is an ultrasonic sealing device.
Claim 6
Dependent Claim
19 words
The apparatus of claim 1 further characterized in that the means for shrinking the film is a heating zone.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 further characterized in that the means for sealing the margins of said film is located in a vacuum chamber.
Claim 8
Dependent Claim
37 words
The apparatus of claim 1 further characterized in that the means for envelopingly wrapping the film about the filament comprises a tube which is provided with a longitudinal slot for accommodating the peripheral margins of said film.
Claim 9
Dependent Claim
29 words
The apparatus of claim 9 further characterized in that means is associated with said tube for forcing air outwardly of said film as it is wrapped about said strands.
Claim 10
Dependent Claim
26 words
The apparatus of claim 9 further characterized in that a pulling device is operatively associated with said apparatus for pulling said profile form through said tube.
Claim 11
Dependent Claim
26 words
The apparatus of claim 9 further characterized in that said tube has a decreasing radius of curvature with respect to the longitudinal axis of said tube.
Claim 12
Dependent Claim
22 words
The apparatus of claim 1 further characterized in that means is provided for wrapping a second flexible film about the first film.
Claim 13
Dependent Claim
43 words
The apparatus of claim 1 further characterized in that means is provided for curing said resin matrix in discrete areas along the length of said profile form and for cutting said profile form along said discrete area to form discrete individual profile sections.
Claim 14
Independent Claim
182 words
An apparatus for producing discrete lengths of filament reinforced profile forms comprising a supply of filament strands, means associated with said supply for impregnating said strands with a curable resin matrix, means for consolidating said impregnated strands into a linear profile form, a supply of flexible plastic film, means for wrapping said film about said linear profile form to provide contiguous film margins extending along the length of said profile form, means for sealing said contiguous film margins to enclose said profile form without curing said resin matrix, means for shrinking said film about said profile form primarily in the direction being transverse to the length of said form to tightly enclose the same for retention of the resin in a stage being less than completely cured, means for curing said resin matrix at selected intervals along the length of said profile form and means for severing said profile form at said cured intervals to form discrete lengths of profile forms which contain said resin matrix being less than completely cured being sealed by said film and by said cured resin matrix.
Claim 15
Dependent Claim
30 words
The apparatus of claim 15 wherein means are provided for flattening said profile form at said selected intervals simultaneously with the curing of said resin matrix at said selected intervals.
Claim 16
Dependent Claim
24 words
The apparatus of claim 16 wherein means are provided for grasping said cured and flattened interval for pulling said profile form through said apparatus.
Claim 17
Dependent Claim
20 words
The apparatus of claim 17 wherein means are provided for disconnecting said grasping and pulling means at a preselected location.
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |