US3791908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat sealing porous materials
Assignee: Fitesa Simpsonville Inc
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Filing: 1971-12-02
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Granted: 1974-02-12
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Expires: 1991-12-02
Abstract
Abstract An apparatus for seam bonding layers of fabric by radio frequency power is provided with electrodes at least one of which is flanked by and is recessed in a resilient insulating member which acts to fill the voids in the fabric during bonding and resultingly prevents electrical arcing through the fabric.
Inventors
- 👤 L Gidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:40
CPC Classifications
D; D06; D06M; D06M23/00; D06M23/16; D06M23/18; B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/32; B29C66/324; B29C66/347; B29C66/3472; B29C66/40; B29C66/41; B29C66/43; B29C66/70; B29C66/72; B29C66/729; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/8145; B29C66/81457; B29C66/818; B29C66/8187; B29C66/81871; B29C66/83; B29C66/832; B29C66/8322; B29C66/71; B29C66/812; B29C66/8122; B29C66/81411; B29C66/81415; B29C66/81419; B29K; B29K2313/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
The process of claim 1 wherein said porous fabric is a non-woven fabric.
Claim 2
Dependent Claim
18 words
The process of claim 1 wherein said porous fabric is a non-woven fabric comprised of continuous nylon filaments.
Claim 3
Dependent Claim
15 words
The process of claim 3 wherein said resilient insulating members are comprised of silicone rubber.
Claim 4
Dependent Claim
36 words
The process of claim 1 wherein upon the moving together of said electrodes and the compression of said resilient insulating members, the electrode recessed in said resilient insulating members becomes flush with said resilient insulating members.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |