US3128681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double die-cutting
Assignee: Somerville Industries Ltd
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Filing: 1961-10-25
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Granted: 1964-04-14
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Expires: 1981-10-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:35
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/38; B26F1/40; B26F1/42; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4838
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
AN APPARATUS FOR DIE-CUTTING A CARTON BLANK AS TO FORM A ZONE OF WEAKNESS IN THE BLANK, SAID APPARATUS COMPRISING CUTTING DIE MEANS, CYLINDER JACKET MEANS FOR PRESSING SAID BLANK AGAINST SAID DIE MEANS, A FIRST CUTTING KNIFE CARRIED BY SAID DIE MEANS, SAID FIRST KNIFE BEING OF A HEIGHT TO ONLY PARTIALLY CUT THROUGH SAID BLANK WHEN SAID BLANK IS PRESSED AGAINST SAID DIE MEANS, A SECOND CUTTING KNIFE CARRIED ON THE OUTER SURFACE OF SAID CYLINDER JACKET PRESSING MEANS BENEATH SAID BLANK, SAID SECOND KNIFE CONSISTING OF AN UPSTANDING SHARPENED RIDGE IN A FLAT STRIP OF FLEXIBLE TOOL STEEL AND ALSO BEING OF A HEIGHT TO ONLY PARTIALLY CUT THROUGH SAID BLANK WHEN SAID BLANK IS PRESSED AGAINST SAID DIE MEANS, AND ANVIL MEANS CARRIED BY SAID DIE MEANS TO BACK SAID BLANK ON SAID SECOND CUTTING KNIFE, SAID FIRST AND SECOND KNIVES BEING GENERALLY PARALLEL TO EACH OTHER BUT SPACED IN THE DIRECTION TAKEN TRANSVERSE TO THEIR LONGITUDINAL AXES WHEREBY TO FORM A LINEAR ZONE OF WEAKNESS CAPABLE OF FORMING ONE EDGE OF A TEAR STRIP IN A CARTON BLANK.
Claim 2
Independent Claim
183 words
AN APPARATUS FOR DIE-CUTTING A CARTON BLANK AS TO FORM A ZONE OF WEAKNESS IN THE BLANK, SAID APPARATUS COMPRISING CUTTING DIE MEANS, CYLINDER JACKET MEANS FOR PRESSING SAID BLANK AGAINST SAID DIE MEANS, A FIRST CUTTING KNIFE CARRIED BY SAID DIE MEANS, SAID FIRST KNIFE BEING OF A HEIGHT TO ONLY PARTIALLY CUT THROUGH SAID BLANK WHEN SAID BLANK IS PRESSED AGAINST SAID DIE MEANS, A SECOND CUTTING KNIFE CARRIED ON THE OUTER SURFACE OF SAID CYLINDER JACKET PRESSING MEANS BENEATH SAID BLANK, SAID SECOND KNIFE CONSISTING OF AN UPSTANDING SHARPENED RIDGE IN A FLAT STRIP OF FLEXIBLE TOOL STEEL AND ALSO BEING OF A HEIGHT TO ONLY PARTIALLY CUT THROUGH SAID BLANK WHEN SAID BLANK IS PRESSED AGAINST SAID DIE MEANS, AND ANVIL MEANS CARRIED BY SAID DIE MEANS TO BACK SAID BLANK ON SAID SECOND CUTTING KNIFE, SAID FIRST AND SECOND KNIVES BEING GENERALLY PARALLEL TO EACH OTHER BUT SPACED IN THE DIRECTION TAKEN TRANSVERSE TO THEIR LONGITUDINAL AXES WHEREBY TO FORM A LINEAR ZONE OF WEAKNESS CAPABLE OF FORMING ONE EDGE OF A TEAR STRIP IN A CARTON BLANK.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |