US3726623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web transfer system
Assignee: GFC FOAM Corp A CORP OF DE
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Filing: 1971-10-20
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Granted: 1973-04-10
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Expires: 1991-10-20
Abstract
Abstract Contouring of flexible webs to the interior of an elongated moving molding channel by the provision of specially located and specially shaped guiding devices, by the provision of special internal mold supports and by the selective overlapping of separate web sheets.
Inventors
- 👤 C Ferstenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:08
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/324; B29C44/30; B29C44/306
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
A web transfer apparatus for changing the transverse contour of a longitudinally moving web without development of wrinkles, said apparatus forming a portion of a molding device for forming a foamed cellular product from a liquid reaction mixture, said apparatus comprising an input guide means for guiding an incoming web having a first transverse contour, an output guide means for guiding said web having a second transverse contour, and web contour changing guide means intermediate said input and output guide means for changing the shape of the web so that no stress variation is produced transversely across such web and said web proceeds along with said second contour in a smooth, wrinkle-free manner, said molding device including cooperating conveyors configured and driven to define a moving molding channel for said web, each of said means being relatively positioned such that the web transfer path between said input and output guide means is substantially the same for each longitudinal line in a web passing through said apparatus.
Claim 2
Dependent Claim
166 words
A web transfer apparatus for changing the transverse contour of a longitudinally moving web without development of wrinkles, said apparatus forming a portion of a molding device for forming a foamed cellular product from a liquid reaction mixture, said apparatus comprising an input guide means for guiding an incoming web having a first transverse contour, an output guide means for guiding said web having a second transverse contour, and web contour changing guide means intermediate said input and output guide means for changing the shape of the web so that no stress variation is produced transversely across such web and said web proceeds along with said second contour in a smooth, wrinkle-free manner, said molding device including cooperating conveyors configured and driven to define a moving molding channel for said web, each of said means being relatively positioned such that the web transfer path between said input and output guide means is substantially the same for each longitudinal line in a web passing through said apparatus.
Claim 3
Dependent Claim
42 words
Web transfer apparatus as in claim 1 wherein said input guide means includes web feed means synchronized to be driven through said web contour changing guide means and into and through said channel at the same rate of movement as said channel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |