US3107191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for extruding plastic film
Assignee: Primerica Inc
•
Filing: 1960-08-03
•
Granted: 1963-10-15
•
Expires: 1980-08-03
Abstract
No abstract record available.
Inventors
- 👤 Brownold Charles Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:40
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/25; B29C48/30; B29C48/305; B29C48/88; B29C48/911; B29C48/9135; B29C48/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A METHOD FOR PRODUCING SHEET MATERIAL COMPRISING THE STEPS OF HEATING A THERMOPLASTIC RESIN TO THE MOLTEN STATE AND APPLYING PRESSURE THERETO, CONDUCTING SAID PRESSURIZED MOLTEN PLASTIC TO A THIN DIE OPENING COMPRISING AN INITIAL PORTION HAVING SUBSTANTIALLY PARALLEL OPPOSED SIDE AND END SURFACES AND A FINAL PORTION HAVING LATERALLY DIVERGENT END SURFACES EXTENDING TO THE OUTER END OF SAID OPENING, EXTRUDING SAID PLASTIC THROUGH SAID INITIAL PORTION IN THE FORM OF A THIN PLASTIC FILM HAVING A PREDETERMINED THICKNESS AND WIDTH DEFINED BY THE SPACING BETWEEN SAID PARALLEL OPPOSED SIDE AND END SURFACES RESPECTIVELY, DIRECTING THE MARGINAL EDGE PORTIONS OF SAID FILM LATERALLY OUTWARDLY AS IT PASSES THROUGH SAID LATERALLY DIVERGENT FINAL PORTION THEREBY THINNING SAID MARGINAL EDGE PORTIONS AND INCREASING THE WIDTH OF SAID FILM FROM SAID PREDETERMINED WIDTH, CONVEYING SAID FILM ON TO ONE SURFACE OF A CARRIER WEB, PRESSING SAID FILM AND WEB INTO BONDING ENGAGEMENT, AND COLING SAID PLASTIC FILM TO A TEMPERATURE WHICH IS LOWER THAN ITS SOLIDIFICATIN TEMPERATURE THEREBY FORMING A COATED SHEET MATERIAL HAVING A COATING OF SUBSTANTIALLY UNIFORM THICKNESS.
Claim 2
Independent Claim
178 words
A METHOD FOR PRODUCING SHEET MATERIAL COMPRISING THE STEPS OF HEATING A THERMOPLASTIC RESIN TO THE MOLTEN STATE AND APPLYING PRESSURE THERETO, CONDUCTING SAID PRESSURIZED MOLTEN PLASTIC TO A THIN DIE OPENING COMPRISING AN INITIAL PORTION HAVING SUBSTANTIALLY PARALLEL OPPOSED SIDE AND END SURFACES AND A FINAL PORTION HAVING LATERALLY DIVERGENT END SURFACES EXTENDING TO THE OUTER END OF SAID OPENING, EXTRUDING SAID PLASTIC THROUGH SAID INITIAL PORTION IN THE FORM OF A THIN PLASTIC FILM HAVING A PREDETERMINED THICKNESS AND WIDTH DEFINED BY THE SPACING BETWEEN SAID PARALLEL OPPOSED SIDE AND END SURFACES RESPECTIVELY, DIRECTING THE MARGINAL EDGE PORTIONS OF SAID FILM LATERALLY OUTWARDLY AS IT PASSES THROUGH SAID LATERALLY DIVERGENT FINAL PORTION THEREBY THINNING SAID MARGINAL EDGE PORTIONS AND INCREASING THE WIDTH OF SAID FILM FROM SAID PREDETERMINED WIDTH, CONVEYING SAID FILM ON TO ONE SURFACE OF A CARRIER WEB, PRESSING SAID FILM AND WEB INTO BONDING ENGAGEMENT, AND COLING SAID PLASTIC FILM TO A TEMPERATURE WHICH IS LOWER THAN ITS SOLIDIFICATIN TEMPERATURE THEREBY FORMING A COATED SHEET MATERIAL HAVING A COATING OF SUBSTANTIALLY UNIFORM THICKNESS.
References Cited (Backward Citations)
US2923971A
Cited
US1717620A
Cited
US2329421A
Cited
US2668988A
Cited
US2659103A
Cited
US2607712A
Cited
US2727275A
Cited
US2774106A
Cited
US2712155A
Cited
US2865048A
Cited
US2871884A
Cited
US3018515A
Cited
US2971222A
Cited
US2982995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |