Patent US3291879A successfully refreshed from Google Patents.
US3291879A
Expired / Lapsed
US
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Method and apparatus for fabricating plastic web
Assignee: Dow Chemical Co
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Filing: 1965-01-21
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Granted: 1966-12-13
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Allan D Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:34
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/345; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/13; B29C48/32; B29C48/09; B29C48/11; B29C48/12; B29L; B29L2028/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A METHOD FOR FABRICATING A FLAT PLASTIC WEB PATTERN OF ABSTRACT SHAPE COMPRISING THE STEPS OF FORMING SAID WEB PATTERN OF ABSTRACT SHAPE ON THE PERIPHERAL SURFACE OF A CYLINDRICAL MEMBER, CONFINING SAID CYLINDRICAL MEMBER WITHIN AN OUTER CYLINDRICA MEMBER HAVING A SLOT FORMED THEREIN, EXTRUDING EXTRUDABLE PLASTIC MATERIAL INTO SAID PATTERN, AND ROTATING ONE OF SAID CYLINDRICAL MEMBERS TO EXTRUDE SAID FORMED ABSTRACTE SHAPED WEB PATTERN OUT THROUGH SAID SLOT.
Claim 2
Independent Claim
71 words
A METHOD FOR FABRICATING A FLAT PLASTIC WEB PATTERN OF ABSTRACT SHAPE COMPRISING THE STEPS OF FORMING SAID WEB PATTERN OF ABSTRACT SHAPE ON THE PERIPHERAL SURFACE OF A CYLINDRICAL MEMBER, CONFINING SAID CYLINDRICAL MEMBER WITHIN AN OUTER CYLINDRICA MEMBER HAVING A SLOT FORMED THEREIN, EXTRUDING EXTRUDABLE PLASTIC MATERIAL INTO SAID PATTERN, AND ROTATING ONE OF SAID CYLINDRICAL MEMBERS TO EXTRUDE SAID FORMED ABSTRACTE SHAPED WEB PATTERN OUT THROUGH SAID SLOT.
Claim 3
Dependent Claim
96 words
APPARATUS FOR FABRICATING FLAT PLASTIC WEB PATTERNS OF ABSTRATE SHAPE COMPRISING AN OUTER CYLINDRICAL CASING, A CYLINDER ASSEMBLY ROTATABLY MOUNTED IN SAID CASING, AND MEANS TO ROTATE SAID CYLINDER ASSEMBLY, SAID CYLINDER ASSEMBLY BEING FORMED WITH A PLURALITY OF GROOVES OF ABSTRACT SHAPE ON ITS PERIPHERAL SURFACE AND HAVING MEANS THEREIN FOR CONDUCTION OF PLASTIC MATERIAL TO SAID GROOVES, SAID CASING BEING FORMED TO PROVIDE A SLOT COEXTENSIVE WITH THE LONGITUDINAL BOUNDS OF SAID GROOVES WHEREBY PLASTIC MATERIAL CAN BE EXTRUDED AND WILL FLOW OUT AS EVERY POINT OF INTERSECTION OF THE GROOVES AND THE SLOT.
Claim 4
Dependent Claim
96 words
APPARATUS FOR FABRICATING FLAT PLASTIC WEB PATTERNS OF ABSTRATE SHAPE COMPRISING AN OUTER CYLINDRICAL CASING, A CYLINDER ASSEMBLY ROTATABLY MOUNTED IN SAID CASING, AND MEANS TO ROTATE SAID CYLINDER ASSEMBLY, SAID CYLINDER ASSEMBLY BEING FORMED WITH A PLURALITY OF GROOVES OF ABSTRACT SHAPE ON ITS PERIPHERAL SURFACE AND HAVING MEANS THEREIN FOR CONDUCTION OF PLASTIC MATERIAL TO SAID GROOVES, SAID CASING BEING FORMED TO PROVIDE A SLOT COEXTENSIVE WITH THE LONGITUDINAL BOUNDS OF SAID GROOVES WHEREBY PLASTIC MATERIAL CAN BE EXTRUDED AND WILL FLOW OUT AS EVERY POINT OF INTERSECTION OF THE GROOVES AND THE SLOT.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |