Patent US7174520B2 successfully refreshed from Google Patents.
US3552244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary die stripping
Assignee: Individual
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Filing: 1969-04-17
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Granted: 1971-01-05
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Expires: 1989-04-17
Abstract
Abstract Waste sections of sheet material cut with a rotary die are stripped from the sheet material by means which divide the waste section into hinged, connected portions, the hinge lines lying substantially parallel to the axis of rotation of the rotary die. The hinged, connected portions of the waste section are effectively stripped, one after another, by the expelling action of ejection material, e.g. a resilient pad, mounted within the cutting die that cuts out the waste section.
Inventors
- 👤 Kilby P Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:36
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/18; B26D7/1818; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0207; Y10T83/0215; Y10T83/04; Y10T83/0448; Y10T83/0467; Y10T83/202; Y10T83/2074; Y10T83/2079; Y10T83/2092; Y10T83/2096; Y10T83/21; Y10T83/2105; Y10T83/2107
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
A rotary cutting die assembly adapted to strip cutouts from sheet material comprising: a mounting cylinder; cutting means mounted on said cylinder to cut out of said sheet material the waste section to be stripped; and resilient means mounted within said cutting means, said resilient means radially compressing during cutting and thereafter exerting an expelling force on said waste section of sheet material to strip it from the remainder of said sheet material; characterized by means mounted within said cutting means for dividing said waste section into hinged, connected portions to facilitate bending of the waste section by said resilient means during stripping, the hinge line extending substantially parallel to the cylinder axis.
Claim 2
Dependent Claim
113 words
A rotary cutting die assembly adapted to strip cutouts from sheet material comprising: a mounting cylinder; cutting means mounted on said cylinder to cut out of said sheet material the waste section to be stripped; and resilient means mounted within said cutting means, said resilient means radially compressing during cutting and thereafter exerting an expelling force on said waste section of sheet material to strip it from the remainder of said sheet material; characterized by means mounted within said cutting means for dividing said waste section into hinged, connected portions to facilitate bending of the waste section by said resilient means during stripping, the hinge line extending substantially parallel to the cylinder axis.
Claim 3
Dependent Claim
58 words
A rotary cutting die assembly according to claim 1 wherein said dividing means comprises at least one cutter mounted on said cylinder, extending substantially parallel to the cylinder axis, the edge of said cutter being positioned in height to cut partially through said waste section, thereby to weaken it and permit it to hinge about the cutting line.
Claim 4
Dependent Claim
58 words
A rotary cutting die assembly according to claim 1 wherein said dividing means comprises at least one blunt creaser mounted on said cylinder, extending substantially parallel to the cylinder axis, the blunt edge of said creaser being positioned in height to crease said waste section, thereby to weaken it and permit it to hinge about the crease line.
Claim 5
Dependent Claim
77 words
A rotary cutting die assembly according to claim 1 wherein said dividing means comprises at least one cutter mounted on said cylinder, extending substantially parallel to the cylinder axis, the edge of said cutter being positioned in height to cut completely through said waste section, said cutter being shorter than the distance across said waste section to provide an uncut bridge connecting said portions and bending to permit the hinging of said portions about the cutting line.
Claim 6
Dependent Claim
15 words
A rotary cutting die assembly according to claim 4 wherein said cutter is a perforator.
Claim 7
Dependent Claim
30 words
A rotary cutting die assembly according to claim 1 wherein said dividing means comprIses means for mechanically weakening said sheet material along a line to permit it to hinge thereabout.
Claim 8
Dependent Claim
89 words
A process for stripping waste sections cut from sheet material by a rotary die assembly having cutting means to cut the waste section from said sheet material, comprising: while cutting, dividing said waste section into hinged, connected portions with the hinge lines lying substantially parallel to the axis of said assembly; and expelling said portions from the sheet material, one after another, with resilient means mounted within said cutting means and adapted to compress during cutting and to thereafter expand to exert a force on said waste section portions.
Claim 9
Dependent Claim
89 words
A process for stripping waste sections cut from sheet material by a rotary die assembly having cutting means to cut the waste section from said sheet material, comprising: while cutting, dividing said waste section into hinged, connected portions with the hinge lines lying substantially parallel to the axis of said assembly; and expelling said portions from the sheet material, one after another, with resilient means mounted within said cutting means and adapted to compress during cutting and to thereafter expand to exert a force on said waste section portions.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |