Patent FR68091E successfully refreshed from Google Patents.
US4100241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing curved bodies of fiber reinforced plastic
Assignee: Goodyear Tire and Rubber Co
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Filing: 1976-07-14
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Granted: 1978-07-11
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Expires: 1996-07-14
Abstract
Abstract A method for manufacturing a curved fiber reinforced body of plastic material by cutting plastic impregnated fibers with a cutter, directing the cut fibers onto a rotating form and applying a plastic material to the fibers. The fibers are deposited in predetermined radial and circumferential directions to build up a proform of overlapping layers of oriented fibers as the form is rotated. The preform is shaped by compression between mating shaping forms to substantially the final molded shape. The plastic material contains a curative and is partially cured under controlled conditions after the preform is built. The preform is then preheated in an oven and molded under predetermined pressures and temperatures.
Inventors
- 👤 William J. Hampshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:39
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/34; B29C41/36; B29C41/365; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/305; B29C70/34; B29C70/345; B29C70/54; B29C70/541; D; D04; D04H; D04H3/00; D04H3/02; D04H3/07; D04H3/08; D04H3/16; B29L; B29L2031/00; B29L2031/709; B29L2031/7096; B29L2031/7102
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
158 words
A method of building a preform for a curved fiber reinforced body of plastic material in which said body is curved about an axis of revolution having a radius of curvature comprising: (a) depositing a stream of radial fibers on a support rotating about a generally vertical axis at a first position over said support in a direction generally along the radii of curvature of said curved body, (b) depositing a stream of circumferential fibers on said support rotating about said axis at a second position over said support in a direction generally tangential to an arc of said body, (c) spraying a liquid plastic material onto said fibers during steps (a) and (b) so that successive layers of said fibers coated with said liquid plastic material are built up during successive revolutions of said support during rotation until a preform of desired thickness is laid down on said support, and (d) removing said preform from said support.
Claim 2
Independent Claim
158 words
A method of building a preform for a curved fiber reinforced body of plastic material in which said body is curved about an axis of revolution having a radius of curvature comprising: (a) depositing a stream of radial fibers on a support rotating about a generally vertical axis at a first position over said support in a direction generally along the radii of curvature of said curved body, (b) depositing a stream of circumferential fibers on said support rotating about said axis at a second position over said support in a direction generally tangential to an arc of said body, (c) spraying a liquid plastic material onto said fibers during steps (a) and (b) so that successive layers of said fibers coated with said liquid plastic material are built up during successive revolutions of said support during rotation until a preform of desired thickness is laid down on said support, and (d) removing said preform from said support.
Claim 3
Dependent Claim
48 words
The method of claim 1 further comprising prior to steps (a) and (b) cutting to length said circumferential fibers and said radial fibers from strands of fiberglass roving which has been sized at an earlier time by impregnation with 3 to 5 percent by weight of plastic material.
Claim 4
Dependent Claim
98 words
The method of claim 1 including prior to step (a) the feeding of some of said strands of said fiberglass roving over a first cutter, cutting said radial fibers to length and projecting them through a first funnel in said directions generally along the radii of curvature of said body during step (a), and prior to step (b) feeding other of said strands of said fiberglass roving over a second cutter, cutting said circumferential fibers to length and projecting them through a second funnel in said directions generally tangential to an arc of said body during step (b).
Claim 5
Dependent Claim
46 words
The method of claim 3 wherein said liquid plastic material of step (c) is applied in said first funnel to said radial fibers during step (a) and in said second funnel to said circumferential fibers during step (b) prior to being deposited on said rotatable support.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein said radial fibers of step (a) are of greater length than said circumferential fibers of step (b).
Claim 7
Dependent Claim
41 words
The method of claim 1 wherein said rotation of said support in steps (a) and (b) is at a different speed as one portion of said support passes said first and second positions to provide a preform portion of different thickness.
Claim 8
Independent Claim
205 words
A method of making a curved fiber reinforced body of plastic material in which said body is curved about an axis of revolution having a radius of curvature comprising: (a) depositing a stream of radial fibers on a support rotating about a generally vertical axis at a first position over said support in a direction generally along the radii of curvature of said curved body, (b) depositing a stream of circumferential fibers on said support rotating about said axis at a second position over said support in a direction generally tangential to an arc of said body, (c) spraying a liquid plastic material which is partially curable at a relatively low temperature and fully curable at a relatively high temperature onto said fibers during steps (a) and (b) so that successive layers of said fibers coated with said liquid plastic material are built up during successive revolutions of said support during rotation until a preform of desired thickness is laid down on said support, (d) removing said preform from said support, (e) compressing and shaping said preform, and (f) heating and pressing said preform at said relatively high temperature to bond said fibers and said plastic material and mold the same into a unitary structure.
Claim 9
Independent Claim
205 words
A method of making a curved fiber reinforced body of plastic material in which said body is curved about an axis of revolution having a radius of curvature comprising: (a) depositing a stream of radial fibers on a support rotating about a generally vertical axis at a first position over said support in a direction generally along the radii of curvature of said curved body, (b) depositing a stream of circumferential fibers on said support rotating about said axis at a second position over said support in a direction generally tangential to an arc of said body, (c) spraying a liquid plastic material which is partially curable at a relatively low temperature and fully curable at a relatively high temperature onto said fibers during steps (a) and (b) so that successive layers of said fibers coated with said liquid plastic material are built up during successive revolutions of said support during rotation until a preform of desired thickness is laid down on said support, (d) removing said preform from said support, (e) compressing and shaping said preform, and (f) heating and pressing said preform at said relatively high temperature to bond said fibers and said plastic material and mold the same into a unitary structure.
Claim 10
Dependent Claim
22 words
The method of claim 7 where in step (e) said preform is sandwiched between shaping forms for compression to a desired shape.
Claim 11
Dependent Claim
55 words
The method of claim 8 wherein said preform in step (c) has a U-shaped cross section with outer and inner edges and in step (e) said preform is in a position with said outer and inner edges raised for draining of a portion of said liquid plastic material into a middle portion of said body.
Claim 12
Dependent Claim
22 words
The method of claim 7 wherein between steps (e) and (f) said preform is preheated to soften the preform prior to molding.
Claim 13
Dependent Claim
47 words
The method of claim 7 including the depositing of said radial fibers in step (a), the depositing of said circumferential fibers in step (b) and the spraying of said liquid plastic material in step (c) on a contoured female first shaping form removably mounted on said support.
Claim 14
Dependent Claim
20 words
The method of claim 11 wherein after step (d) said plastic material is partially cured at said relatively low temperature.
Claim 15
Dependent Claim
41 words
The method of claim 12 wherein said preform in said shaping form is moved into an enclosure after step (d) and the relatively low curing temperature in said enclosure is controlled to provide the desired partial curing of said plastic material.
Claim 16
Dependent Claim
32 words
The method of claim 13 wherein between step (e) and step (f) said preform is removed from said enclosure after partial curing of said plastic material and preheated to soften said preform.
References Cited (Backward Citations)
US3347967A
Cited
US3687587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |