Patent US3144216A successfully refreshed from Google Patents.
US3144216A
Expired / Lapsed
US
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Apparatus for slitting film and removing the srtrips from the cutting zone under unequal tension
Assignee: EIDP Inc
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Filing: 1961-09-12
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Granted: 1964-08-11
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Expires: 1981-09-12
Abstract
No abstract record available.
Inventors
- 👤 Billingsley John George Selby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:13
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/18; B26D7/1845; B26D7/1863; B26D1/00; B26D1/01; B26D1/02; B26D1/03; B26D1/035; B26D2007/0012; B26D2007/0068; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/207; Y10T83/2074
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
AN APPARATUS FOR SLITTING AND TRIMMING A CONTINUOUS TENSIONED WEB INTO WIDE AND INTERIOR NARROW STRIPS COMPRISING, IN COMBINATION, A SOURCE OF SUPPLY FOR THE WEB; A WIND-UP MANDREL ON WHICH SAID WIDE STRIPS ARE WOUND; A GROOVED SUPPORT ROLL IN WHICH THE RAISED PORTION BETWEEN ADJACENT GROOVES IS UNDER ONE-INCH IN WIDTH AND THE SAME WIDTH AS SAID NARROW STRIP, SAID ROLL BEING TRANSVERSELY DISPOSED TO SAID WEB AND OVER WHICH SAID WEB IS PASSED UNDER TENSION; ADJACENT CUTTING KNIVES THE CUTTING EDGES OF WHICH PROJECT INTO THE PATH OF TRAVEL OF THE WEB AND INTO THE ADJACENT GROOVES OF SAID SUPPORT ROLL IN CLOSE PROXIMITY TO SAID RAISED PORTION SO AS TO FORM A CUTTING ZONE, SAID KNIVES INCLINED AWAY FROM EACH OTHER TO FORM AN ANGLE OF AT LEAST 0.5 DEGREE BETWEEN THEIR ADJACENT CUTTING PLANES, AND MEANS OTHER THAN SAID WIND-UP MANDREL FOR REMOVING THE NARROW STRIP OF WEB PASSING BETWEEN SAID ADJACENT KNIVES UNDER A TENSION LOWER THAN THE TENSION APPLIED TO SAID WIDE STRIPS.
Claim 2
Independent Claim
170 words
AN APPARATUS FOR SLITTING AND TRIMMING A CONTINUOUS TENSIONED WEB INTO WIDE AND INTERIOR NARROW STRIPS COMPRISING, IN COMBINATION, A SOURCE OF SUPPLY FOR THE WEB; A WIND-UP MANDREL ON WHICH SAID WIDE STRIPS ARE WOUND; A GROOVED SUPPORT ROLL IN WHICH THE RAISED PORTION BETWEEN ADJACENT GROOVES IS UNDER ONE-INCH IN WIDTH AND THE SAME WIDTH AS SAID NARROW STRIP, SAID ROLL BEING TRANSVERSELY DISPOSED TO SAID WEB AND OVER WHICH SAID WEB IS PASSED UNDER TENSION; ADJACENT CUTTING KNIVES THE CUTTING EDGES OF WHICH PROJECT INTO THE PATH OF TRAVEL OF THE WEB AND INTO THE ADJACENT GROOVES OF SAID SUPPORT ROLL IN CLOSE PROXIMITY TO SAID RAISED PORTION SO AS TO FORM A CUTTING ZONE, SAID KNIVES INCLINED AWAY FROM EACH OTHER TO FORM AN ANGLE OF AT LEAST 0.5 DEGREE BETWEEN THEIR ADJACENT CUTTING PLANES, AND MEANS OTHER THAN SAID WIND-UP MANDREL FOR REMOVING THE NARROW STRIP OF WEB PASSING BETWEEN SAID ADJACENT KNIVES UNDER A TENSION LOWER THAN THE TENSION APPLIED TO SAID WIDE STRIPS.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |