US3726167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cutting thick books
Assignee: Comstock and Wescott Inc
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Filing: 1971-07-22
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Granted: 1973-04-10
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Expires: 1991-07-22
Abstract
Abstract A group of collated book signatures or other layers of paper are cut with bevel edged bits spaced around the circular periphery of a wheel by feeding the paper in the same direction as the teeth rotate such that an exposed side of the paper advances in a plane intersecting normal to the circular radius more than half an inch from the outer end of the radius, and such that the bevelled outer corner of the cutting edge enters through the paper plane first and with the edge inclined away from the paper plane at an angle of zero to 20*. At its furthest penetration each cutting edge is inclined at less than 60* to the cutting plane.
Inventors
- 👤 R Barbour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:10
CPC Classifications
B; B42; B42C; B42C5/00; B26; B26D; B26D1/00; B26D1/01; B26D1/04; B26D1/06; B26D1/08; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/934; Y10T; Y10T83/00; Y10T83/04; Y10T83/0515; Y10T83/647; Y10T83/6584; Y10T83/929; Y10T83/9372; Y10T83/9403
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
The method of cutting through multiple planar sheets of paper with circularly spaced, beveled cutting edges obliquely inclined to the circular radius, which comprises rotating the cutting edges in a given direction, advancing the paper in the same direction, penetrating the paper through the outer face plane thereof with the outer rotationally rearward extremity of each cutting edge entering first and to a greater penetration depth than the rotationally forward cutting edge extremity, and with the entering cutting edge inclined from said extremity away from the paper plane at a negative entry angle between 0* and 20*, and with the furthest penetrating cutting edge inclined at an angle less than 60* to the paper plane.
Claim 2
Independent Claim
115 words
The method of cutting through multiple planar sheets of paper with circularly spaced, beveled cutting edges obliquely inclined to the circular radius, which comprises rotating the cutting edges in a given direction, advancing the paper in the same direction, penetrating the paper through the outer face plane thereof with the outer rotationally rearward extremity of each cutting edge entering first and to a greater penetration depth than the rotationally forward cutting edge extremity, and with the entering cutting edge inclined from said extremity away from the paper plane at a negative entry angle between 0* and 20*, and with the furthest penetrating cutting edge inclined at an angle less than 60* to the paper plane.
Claim 3
Dependent Claim
28 words
The method according to claim 1 wherein the paper is advanced with one side thereof in a plane intersecting the normal circular radius more than one half inch.
Claim 4
Dependent Claim
20 words
The method according to claim 1 wherein the cutting edge enters the paper plane at an angle of approximately 10*.
Claim 5
Dependent Claim
25 words
The method according to claim 1 wherein each cutting edge at its furthest penetration is inclined at an angle of 45* to the paper plane.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |