US4066488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the joining (bonding) of lines (strips)
Assignee: Individual
•
Filing: 1977-04-07
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Granted: 1978-01-03
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Expires: 1997-04-07
Abstract
Abstract A process is disclosed for the joining of lines of acetalyzed polyvinyl alcohol foam with each other or with textile fabrics. The process is characterized by the fact that the parts of the lines to be joined together are brought into contact with each other and hot pressed, in the presence of moisture at tool temperatures of from 100° to 300° C. and a pressure of 1-10 kp/cm 2 . The process is further characterized by the fact that the line of acetalyzed polyvinyl alcohol foam is saturated with water to its swelling limit, and by the application of the process to a line of formaldehyde-acetalyzed polyvinyl alcohol foam, of which the degree of acetalyzation amounts to about 20% by weight.
Inventors
- 👤 Alfred von der Lehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:21
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/32; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/70; B29C66/71; B29C66/72; B29C66/727; B29C66/729; B29C66/74; B29C66/748; B29C66/7485; B29C66/80; B29C66/81; B29C66/818; B29C66/8187; B29C66/81871; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91211; B29C66/91212; B29C66/91231; B29C66/914; B29C66/9141; B29C66/91421; B29C66/91431; B29C66/919; B29C66/92; B29C66/924; B29C66/9241; B29C66/929; B29C66/94; B29C66/949; B29C66/96; B29C66/967; B29C66/9674; B29K; B29K2027/00; B29K2029/00; B29K2029/04; B29K2031/00; B29K2105/00; B29K2105/04; B29K2311/00; B29K2311/10; B29K2313/00; Y; Y10; Y10S; Y10S602/00; Y10S602/90; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/31504; Y10T428/31536; Y10T428/31942
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
Process for the joining of strips of acetalysed polyvinyl alcohol foam with each other or with textile fabrics, with the distinction that the parts of the strips to be joined together are brought in contact with each other and hot pressed, in the presence of moisture at temperatures of 100°-300° C., preferably 200°-250° C., and a pressure of 1-10 kp/cm 2 , preferably 4-6 kp/cm 2 .
Claim 2
Dependent Claim
67 words
Process for the joining of strips of acetalysed polyvinyl alcohol foam with each other or with textile fabrics, with the distinction that the parts of the strips to be joined together are brought in contact with each other and hot pressed, in the presence of moisture at temperatures of 100°-300° C., preferably 200°-250° C., and a pressure of 1-10 kp/cm 2 , preferably 4-6 kp/cm 2 .
Claim 3
Dependent Claim
24 words
Process according to claim 1, with the distinction that the strip of acetalysed polyvinyl alcohol foam is saturated with water to its swelling limit.
Claim 4
Dependent Claim
31 words
Application of the process according to claim 2 to a strip, known per se, of formaldehyde-acetalysed polyvinyl alcohol foam, of which the degree of acetalyzation amounts to about 20% by weight.
References Cited (Backward Citations)
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Cited
US2360712A
Cited
US2441542A
Cited
US2664366A
Cited
US2659935A
Cited
US2992958A
Cited
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |