US3978752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermittent perforator wheel
Assignee: Meaden Screw Products Co
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Filing: 1975-12-29
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Granted: 1976-09-07
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Expires: 1995-12-29
Abstract
Abstract An intermittent perforator wheel structure for providing a tearing edge in a workpiece sheet. The tearing edge is defined by a line of spaced elongated slits and a line of spaced short perforation slits offset from the line of elongated slits. The offset is made to be a small preselected amount. The offset may be preselected to assure that the torn portions of the sheet provided by the spaces between the short slits do not extend beyond the line of elongated slits whereby the edge of the sheet seen by a data processing machine, or the like, into which the sheet may be fed comprises a smooth edge with the torn portions being recessed within the straight smooth edge.
Inventors
- 👤 Thomas F. Meaden
- 👤 George W. Fieberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:59
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/18; B26F1/20; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/4798; Y10T83/929; Y10T83/9372; Y10T83/9408
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
174 words
An intermittent perforator wheel structure for providing a tearing edge in a workpiece sheet, comprising: a first wheel having a peripheral cutting edge provided with a plurality of elongated recesses spaced apart by elongated cutting edge portions; a second wheel having a peripheral cutting edge provided with a plurality of spaced groups of short recesses spaced apart by short cutting edge portions, and a plurality of elongated recesses intermediate said groups; and means for coaxially securing said wheels with said peripheral edges juxtaposed and with said groups of short recesses of said second wheel aligned one each with said elongated recesses of said first wheel whereby said elongated cutting edge portions of said first wheel comprise means for providing a plurality of spaced elongated slits in a workpiece sheet and said short cutting edge portions of said second wheel comprise means for providing a plurality of spaced short perforation slits in the workpice sheet intermediate the elongated slits cooperatively defining a tearing edge having alternating spaced long slits and groups of short perforation slits.
Claim 2
Dependent Claim
174 words
An intermittent perforator wheel structure for providing a tearing edge in a workpiece sheet, comprising: a first wheel having a peripheral cutting edge provided with a plurality of elongated recesses spaced apart by elongated cutting edge portions; a second wheel having a peripheral cutting edge provided with a plurality of spaced groups of short recesses spaced apart by short cutting edge portions, and a plurality of elongated recesses intermediate said groups; and means for coaxially securing said wheels with said peripheral edges juxtaposed and with said groups of short recesses of said second wheel aligned one each with said elongated recesses of said first wheel whereby said elongated cutting edge portions of said first wheel comprise means for providing a plurality of spaced elongated slits in a workpiece sheet and said short cutting edge portions of said second wheel comprise means for providing a plurality of spaced short perforation slits in the workpice sheet intermediate the elongated slits cooperatively defining a tearing edge having alternating spaced long slits and groups of short perforation slits.
Claim 3
Dependent Claim
34 words
The intermittent perforator wheel structure of claim 1 wherein said elongated recesses of said second wheel have a length substantially equal to the length of said elongated cutting edge portions of said first wheel.
Claim 4
Dependent Claim
36 words
The intermittent perforator wheel structure of claim 1 wherein said peripheral cutting edge of the first wheel defines a cutting plane, and the peripheral cutting edge of said second wheel is spaced from said cutting plane.
Claim 5
Dependent Claim
37 words
The intermittent perforator wheel structure of claim 1 wherein the length of said elongated cutting edge portions of said first wheel is substantially equal to the length of said groups of short recesses of said second wheel.
Claim 6
Dependent Claim
211 words
An intermittent perforator wheel structure for providing a tearing edge in a workpiece sheet, comprising: a first wheel having a peripheral cutting edge provided with a plurality of elongated recesses spaced apart by elongated cutting edge portions: a second wheel having a peripheral cutting edge provided with a plurality of spaced groups of short recesses spaced apart by short cutting edge portions, and a plurality of elongated recesses intermediate said groups; a spacer element; and means for coaxially securing said wheels at opposite sides of said spacer element with said peripheral edges of the wheels in spaced juxtaposed relationship and with said groups of short recesses of said second wheel aligned one each with said elongated recesses of said first wheel whereby said elongated cutting edge portions of said first wheel comprise means for providing a line of spaced elongated slits in a workpiece sheet and said short cutting edge portions of said second wheel comprise means for providing a line of spaced short perforation slits in the workpiece sheet intermediate the elongated slits and offset from the line of said elongated slits by the width of said spacer element, said elongated and short slits cooperatively defining a tearing edge having alternating spaced long slits and groups of short perforation slits.
Claim 7
Dependent Claim
211 words
An intermittent perforator wheel structure for providing a tearing edge in a workpiece sheet, comprising: a first wheel having a peripheral cutting edge provided with a plurality of elongated recesses spaced apart by elongated cutting edge portions: a second wheel having a peripheral cutting edge provided with a plurality of spaced groups of short recesses spaced apart by short cutting edge portions, and a plurality of elongated recesses intermediate said groups; a spacer element; and means for coaxially securing said wheels at opposite sides of said spacer element with said peripheral edges of the wheels in spaced juxtaposed relationship and with said groups of short recesses of said second wheel aligned one each with said elongated recesses of said first wheel whereby said elongated cutting edge portions of said first wheel comprise means for providing a line of spaced elongated slits in a workpiece sheet and said short cutting edge portions of said second wheel comprise means for providing a line of spaced short perforation slits in the workpiece sheet intermediate the elongated slits and offset from the line of said elongated slits by the width of said spacer element, said elongated and short slits cooperatively defining a tearing edge having alternating spaced long slits and groups of short perforation slits.
Claim 8
Dependent Claim
22 words
The intermittent perforator wheel structure of claim 5 wherein said spacer element comprises an annular element coaxially secured to between said wheels.
Claim 9
Dependent Claim
17 words
The intermittent perforator wheel structure of claim 5 wherein said securing means comprises an axial bearing means.
Claim 10
Dependent Claim
26 words
The intermittent perforator wheel structure of claim 5 wherein said securing means comprises an axial bearing means, said wheels and said spacer element being press-fitted thereto.
Claim 11
Dependent Claim
77 words
The intermittent perforator wheel structure of claim 5 wherein the width of said spacer element is preselected to offset said line of short slits from the line of said elongated slits a distance greater than the normal projecting portion of the workpiece sheet resulting from the tearing of said workpiece sheet apart along said tearing edge whereby said tearing edge is defined by a series of recesses containing said projecting portions within said line of elongated slits.
Claim 12
Dependent Claim
28 words
The intermittent perforator wheel structure of claim 5 wherein the width of said spacer element is greater than the length of said short recesses of said second wheel.
Claim 13
Dependent Claim
30 words
The intermittent perforator wheel structure of claim 5 wherein the width of said spacer element is greater than the length of said short cutting edge portions of said second wheel.
References Cited (Backward Citations)
US3268136A
Cited
US3847045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |