US3359842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for slitting metal foil
Assignee: John Dusenbery Co Inc
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Filing: 1965-06-30
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Granted: 1967-12-26
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Roger W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:33
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/26; B26D7/2614; B26D7/2621; B23; B23D; B23D19/00; B23D19/04; B23D19/06; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/24; B26D1/245; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7809; Y10T83/783; Y10T83/929; Y10T83/9372; Y10T83/9374
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
SLITTING APPARATUS COMPRISING, (A) A PAIR OF SPACED, PARALLEL, FREELY-ROTATABLE, SUPPORTING SHAFTS, (B) A FIRST SET OF CUTTING KNIVES AND SPACERS ALTERNATELY DISPOSED ON ONE OF THE SAID SHAFTS AND ROTATABLE THEREWITH, SAID KNIVES HAVING A DIAMETER EXCEEDING THAT OF THE SPACERS, (C) A SECOND SET OF SIMILAR CUTTING KNIVES AND SPACERS SIMILARLY CARRIED BY THE OTHER OF THE SAID SHAFTS, EACH OF THESE KNIVES AND SPACERS BEING ALIGNED RESPECTIVELY WITH THE SPACERS AND KNIVES OF THE SAID FIRST SET, (D) MEANS SPACING THE SAID SHAFTS SO THAT THE PERIPHERAL SURFACES OF THE TWO SETS OF KNIVES OVERLAP, AND (E) AT LEAST ONE DRIVEN BACK-UP ROLL IN PERIPHERAL ENGAGEMENT WITH EACH SET OF CUTTING KNIVES.
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) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |