US4608104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a thermoformable laminate structure
Assignee: FOME-CAR COMPANY LLC
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Filing: 1985-07-13
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Granted: 1986-08-26
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Expires: 2005-07-13
Abstract
Abstract A twin-sheet thermoformable laminate structure is provided which has two layers of foamed thermoplastic material. A coating of a fabric impregnated with an acrylic resin having a softening temperature greater than 75° C. is applied to at least the outer surface of each layer of thermoplastic material.
Inventors
- 👤 James S. Holtrop
- 👤 Richard P. Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:39
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; B; B32; B32B; B32B27/00; B32B27/12; B32B5/00; B32B5/22; B32B5/32; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249982; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A method of forming a laminate structure comprising at least two layers of foamed thermoplastic material having at least one cavity between said layers, said method comprising: (a) providing at least two layers of foamed thermoplastic material, said layer having inner and outer surfaces and having a polymer-impregnated fabric bonded to at least one surface of each of said layers, wherein adhesive is applied in a registration pattern on the surface of one of said layers adjacent to another of said layers, (b) providing a blow pin between said layers at a location devoid of adhesive, (c) laminating said at least two layers of foamed thermoplastic material together, (d) heating said layers to a thermoforming temperature, and (e) thermoforming said layers while applying pressurized gas to said blow pin to expand the volume between said layers at locations devoid of adhesive.
Claim 2
Independent Claim
141 words
A method of forming a laminate structure comprising at least two layers of foamed thermoplastic material having at least one cavity between said layers, said method comprising: (a) providing at least two layers of foamed thermoplastic material, said layer having inner and outer surfaces and having a polymer-impregnated fabric bonded to at least one surface of each of said layers, wherein adhesive is applied in a registration pattern on the surface of one of said layers adjacent to another of said layers, (b) providing a blow pin between said layers at a location devoid of adhesive, (c) laminating said at least two layers of foamed thermoplastic material together, (d) heating said layers to a thermoforming temperature, and (e) thermoforming said layers while applying pressurized gas to said blow pin to expand the volume between said layers at locations devoid of adhesive.
Claim 3
Dependent Claim
19 words
The method of claim 1 further comprising cooling said laminate structure by introducing carbon dioxide through said blow pins.
Claim 4
Dependent Claim
22 words
The method of claim 2 wherein a foam material is injected through said blow pins into the expanded volume between said layers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |