US3208103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas chamber for applying pressure to continuous strips of plastic
Assignee: Union Carbide Corp
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Filing: 1962-11-30
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Granted: 1965-09-28
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Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Walter D Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:29
CPC Classifications
B; B32; B32B; B32B37/00; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B29C44/00; B29C44/20; B29C44/30; B29C44/304; B32B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
APPARATUS FOR THE MANUFACTURE OF SANDWICH STRUCTURES HAVING A CORE OF POLYURETHANE FOAM AND AN UPPER AND A LOWER FACING SHEET, SAID APPARATUS COMPRISING IN COMBINATION: A BASE ALONG WHICH A SANDWICH STRUCTURE ADVANCES WITH A LOWER FACING SHEET IN SLIDING CONTACT THEREWITH; AN UPPER GAS BOX POSITIONED ABOVE THE BASE, SAID GAS BOX HAVING VERTICAL SIDEWALLS; A SLEEVE VERTICALLY SLIDABLE AGAINST THE SIDEWALLS OF SAID GAS BOX, THE BOTTOM OF THE SLEEVE BEING IN SLIDING CONTACT WITH THE ADVANCING UPPER FACING SHEET OF THE SANDWICH STRUCTURE; MEANS DIRECTING A STREAM OF GAS TO THE PLENUM CHAMBER DEFINED BY THE GAS BOX SLEEVE, AND ADVANCING SANDWICH STRUCTURE TO MAINTAIN IN SUCH PLENUM CHAMBER A GAUGE PRESSURE LESS THAN ONE ATMOSHERE; AND A FLEXIBLE SKIRT MEMBER INTERCONNECTING SAID SLEEVE AND THE SIDEWALLS OF SAID GAS BOX TO DECREASE THE LEAKAGE OF GAS THROUGH THE SLIDING FIT BETWEEN SAID SLEEVE AND SAID SIDEWALLS.
Claim 2
Dependent Claim
151 words
APPARATUS FOR THE MANUFACTURE OF SANDWICH STRUCTURES HAVING A CORE OF POLYURETHANE FOAM AND AN UPPER AND A LOWER FACING SHEET, SAID APPARATUS COMPRISING IN COMBINATION: A BASE ALONG WHICH A SANDWICH STRUCTURE ADVANCES WITH A LOWER FACING SHEET IN SLIDING CONTACT THEREWITH; AN UPPER GAS BOX POSITIONED ABOVE THE BASE, SAID GAS BOX HAVING VERTICAL SIDEWALLS; A SLEEVE VERTICALLY SLIDABLE AGAINST THE SIDEWALLS OF SAID GAS BOX, THE BOTTOM OF THE SLEEVE BEING IN SLIDING CONTACT WITH THE ADVANCING UPPER FACING SHEET OF THE SANDWICH STRUCTURE; MEANS DIRECTING A STREAM OF GAS TO THE PLENUM CHAMBER DEFINED BY THE GAS BOX SLEEVE, AND ADVANCING SANDWICH STRUCTURE TO MAINTAIN IN SUCH PLENUM CHAMBER A GAUGE PRESSURE LESS THAN ONE ATMOSHERE; AND A FLEXIBLE SKIRT MEMBER INTERCONNECTING SAID SLEEVE AND THE SIDEWALLS OF SAID GAS BOX TO DECREASE THE LEAKAGE OF GAS THROUGH THE SLIDING FIT BETWEEN SAID SLEEVE AND SAID SIDEWALLS.
References Cited (Backward Citations)
US1885121A
Cited
US2135763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |