US4342803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant vacuum pad and method of making same
Assignee: Dura Temp Corp
•
Filing: 1980-10-14
•
Granted: 1982-08-03
•
Expires: 2000-10-14
Abstract
Abstract This invention relates to a laminated vacuum pad, and method of making same, comprising a heat-resistant woven fabric substrate having a continuous heat and wear-resistant continuous coating thereon for handling hot glass articles, and the like, without marring same. The heat-resistant flexible vacuum pad is formed from a tightly woven fabric such as glass fibers with a continuous imperforate coating of organic-inorganic silicone resin containing a filler of heat-resistant carbonaceous material adapted to withstanding extensive repeated contact with newly-formed hot glass articles. The flexible laminated vacuum pad is preferably used as a facing material for a rigid structural member formed of metal.
Inventors
- 👤 Edward J. Stengle, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:41
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/10; B32B25/20; C; C03; C03B; C03B35/00; C03B35/04; C03B40/00; C03B40/005; C03B5/00; C03B5/16; C03B5/167; C03B5/1672; C03B9/00; C03B9/30; C03B9/44; C03B9/447; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/306; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/25; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3911
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A heat-resistant flexible laminated vacuum pad adapted to handling hot glass articles, and the like, comprising a tightly interwoven fabric substrate formed from thin glass fibers adapted to withstand temperatures up to about 1200° F., a silicone rubber backing, adhesive means securing said backing to one surface of said fabric substrate, and a continuous heat-cured coating of polysiloxane resin having a finely-divided filler of heat-resistant carbonaceous material therein extending over the other glass-contacting surface of said substrate to form a laminated pad, said laminated pad being flexible and adapted to hold a vacuum by flexure of said laminated pad prior to use thereof as a vacuum pad.
Claim 2
Dependent Claim
107 words
A heat-resistant flexible laminated vacuum pad adapted to handling hot glass articles, and the like, comprising a tightly interwoven fabric substrate formed from thin glass fibers adapted to withstand temperatures up to about 1200° F., a silicone rubber backing, adhesive means securing said backing to one surface of said fabric substrate, and a continuous heat-cured coating of polysiloxane resin having a finely-divided filler of heat-resistant carbonaceous material therein extending over the other glass-contacting surface of said substrate to form a laminated pad, said laminated pad being flexible and adapted to hold a vacuum by flexure of said laminated pad prior to use thereof as a vacuum pad.
Claim 3
Dependent Claim
25 words
A heat-resistant flexible laminated vacuum pad in accordance with claim 1, wherein said fabric substrate has a thickness of not more than about 1/4 inch.
Claim 4
Dependent Claim
38 words
A heat-resistant flexible laminated vacuum pad in accordance with claim 1, wherein said continuous heat-cured coating of polysiloxane resin consists of an imperforate layer fully penetrating the fabric substrate, said fabric substrate having at least one vacuum orifice.
Claim 5
Dependent Claim
27 words
A heat-resistant flexible laminated vacuum pad in accordance with claim 1, wherein said finely-divided filler of heat-resistant particulate carbonaceous material comprises colloidal graphite having submicron size particles.
Claim 6
Dependent Claim
26 words
A heat-resistant flexible laminated vacuum pad in accordance with claim 1, wherein said finely-divided filler of heat-resistant particulate carbonaceous material comprises graphite and microporous activated charcoal.
Claim 7
Dependent Claim
28 words
A heat-resistant flexible laminated vacuum pad in accordance with claim 1, wherein said fabric substrate is comprised of thin glass fibers having a diameter of about 0.00018 inch.
Claim 8
Dependent Claim
27 words
A heat-resistant flexible laminated vacuum pad in accordance with claim 1, wherein said coating of polysiloxane resin is comprised of methyl phenyl silicone resin dissolved in alcohol.
References Cited (Backward Citations)
US3006403A
Cited
US3953641A
Cited
US3889023A
Cited
US4110095A
Cited
US4059473A
Cited
US4246313A
Cited
US4316930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |