US5043128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming plastic composite material
Assignee: SHIN NIHON KOKU SEIBI KK
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Filing: 1989-11-09
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Granted: 1991-08-27
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Expires: 2009-11-09
Abstract
Abstract A method for heating and press-forming a plied material sheet prepared by impregnating a thermosetting resin into sheets of parallely disposed plastic fiber or into sheets of woven fabric of plastic fiber. The material sheet is formed into an operation which repeats the steps of heating and press-forming such material sheet within a shaping mold on a heating and press-forming apparatus for a predetermined time period and then releasing the pressure for a predetermined time period while step-feeding the material sheet over a predetermined distance for a time period less than the time period of such released pressure.
Inventors
- 👤 Katsuhiko Umeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:33
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29D; B29D99/00; B29D99/0003; B29L; B29L2023/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
242 words
A method of longitudinally forming plastic composite continuous strip material into press formed structural shapes longitudinally along said strip material, said structural shapes having substantially identical uniform cross-sections in planes perpendicular to the longitudinal axis of said plastic composite continuous strip material, which comprises: (a) longitudinally feeding said continuous strip of plastic composite material through shaping means to longitudinally shape said continuous strip and feeding said continuously shaped continuous strip to a heating and press-forming apparatus in longitudinal alignment with said continuous strip in a length to at least longitudinally cover said longitudinally aligned heating and press-forming apparatus with said continuous strip; (b) after said heating and press-forming apparatus is covered with said continuous strip, stopping said continuous strip for a predetermined time period; (c) after said continuous strip is stopped and during said predetermined time period, simultaneously heating and press-forming said predetermined length of said plastic composite material covering said heating and forming apparatus into said structural shape; (d) releasing pressure from said plastic composite material formed into said structural shape after said predetermined time period for a time period T 2 ; and longitudinally feeding said continuous strip of plastic composite material stepwise for a period T 3 while said pressure is released from said plastic composite material, said period T 3 being less than said period T 2 and repeating steps (a) to (d) to obtain a continuous longitudinal pressure formed structural shape longitudinally along said continuous strip material.
Claim 2
Independent Claim
242 words
A method of longitudinally forming plastic composite continuous strip material into press formed structural shapes longitudinally along said strip material, said structural shapes having substantially identical uniform cross-sections in planes perpendicular to the longitudinal axis of said plastic composite continuous strip material, which comprises: (a) longitudinally feeding said continuous strip of plastic composite material through shaping means to longitudinally shape said continuous strip and feeding said continuously shaped continuous strip to a heating and press-forming apparatus in longitudinal alignment with said continuous strip in a length to at least longitudinally cover said longitudinally aligned heating and press-forming apparatus with said continuous strip; (b) after said heating and press-forming apparatus is covered with said continuous strip, stopping said continuous strip for a predetermined time period; (c) after said continuous strip is stopped and during said predetermined time period, simultaneously heating and press-forming said predetermined length of said plastic composite material covering said heating and forming apparatus into said structural shape; (d) releasing pressure from said plastic composite material formed into said structural shape after said predetermined time period for a time period T 2 ; and longitudinally feeding said continuous strip of plastic composite material stepwise for a period T 3 while said pressure is released from said plastic composite material, said period T 3 being less than said period T 2 and repeating steps (a) to (d) to obtain a continuous longitudinal pressure formed structural shape longitudinally along said continuous strip material.
Claim 3
Dependent Claim
18 words
The method as defined in claim 1, wherein said plastic composite material is a sheet of resin-impregnated fiber.
Claim 4
Dependent Claim
13 words
The material as defined in claim 2, wherein said fiber is glass fiber.
Claim 5
Dependent Claim
13 words
The material as defined in claim 2, wherein said fiber is carbon fiber.
Claim 6
Dependent Claim
13 words
The material as defined in claim 2, wherein said fiber is aramid fiber.
Claim 7
Dependent Claim
14 words
The material as defined in claim 2, wherein said resin is an epoxy resin.
Claim 8
Dependent Claim
14 words
The material as defined in claim 2, wherein said resin is a phenol resin.
Claim 9
Dependent Claim
16 words
The material as defined in claim 2, wherein said sheet is a resin-impregnated woven fabric sheet.
Claim 10
Dependent Claim
16 words
The material as defined in claim 2, wherein said sheet is a resin-impregnated unidirectional fiber sheet.
Claim 11
Independent Claim
21 words
The method as defined in claims 1 or 2, wherein said plastic composite material includes roving fabric plied between material sheets.
Claim 12
Independent Claim
20 words
The method as defined in claims 1 or 2, wherein said plastic composite material includes non-woven fiber plied between sheets.
Claim 13
Dependent Claim
21 words
The method as defined in claim 1, wherein said heating and press-forming apparatus includes a press punch and a heating die.
Claim 14
Dependent Claim
16 words
The method as defined in claim 1, wherein said shaped product is an open sectional shape.
Claim 15
Dependent Claim
23 words
The method as defined in claim 1, wherein said shaped product is a closed sectional shape such as closed circular or box-like shape.
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |