Patent US3583269A successfully refreshed from Google Patents.
US3583269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutter device
Assignee: Ricoh Co Ltd
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Filing: 1969-03-13
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Granted: 1971-06-08
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Expires: 1989-03-13
Abstract
Abstract A rotary cutter device comprising a rotary cutter blade having a straight edge normal to the direction in which is fed or advanced a paper to be cut off and a stationary cutter blade having a curved edge inclined relative to said first mentioned edge upon a cylindrical surface generated by the rotation of said rotary cutter blade, the peripheral speed of said edge of said rotary cutter blade being maintained same with the speed of advancing the paper. The cutting line remains always at right angle relative to the direction of paper advancement even if the paper feed speed is varied.
Inventors
- 👤 Yugoro Kobayashi
- 👤 Tsutomu Yamakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:22
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/38; B26D1/385; G; G03; G03D; G03D15/00; G03D15/04; G03D15/043; G03D15/046; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/4824; Y10T83/4847
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
263 words
A rotary cutter device for cutting a strip of sheetlike material along a cutting line extending perpendicular to the side of said strip, said device comprising a continuous rotary cutter blade having an axis of rotation and a rotary blade edge extending parallel to said axis of rotation, said rotary blade edge sweeping out a blade path in the form of a right circular cylinder during rotation of the rotary cUtter blade; guide means for guiding the strip along a strip path, a cutting segment of said strip path coinciding with a portion of the blade path and being flanked by an approach segment of the strip path along which a strip may approach the cutting segment in a direction perpendicular to the axis of rotation and a recession segment along which a strip may recede from the cutting segment, said guide means comprising a pair of spaced guide plates defining between them the approach segment of the strip path; a stationary cutter; a continuous stationary cutter edge on the stationary cutter, said stationary cutting edge when in a cutting position coinciding with the cutting segment of the blade path and extending from one side of the strip path to the other, said stationary cutting edge extending at all segments along its length in a direction which is non-parallel to the axis of rotation of the rotary cutter blade; and feed means for feeding a strip along the strip path at a speed equal to the peripheral speed of the rotary blade edge during engagement of said rotary blade edge with the strip.
Claim 2
Dependent Claim
263 words
A rotary cutter device for cutting a strip of sheetlike material along a cutting line extending perpendicular to the side of said strip, said device comprising a continuous rotary cutter blade having an axis of rotation and a rotary blade edge extending parallel to said axis of rotation, said rotary blade edge sweeping out a blade path in the form of a right circular cylinder during rotation of the rotary cUtter blade; guide means for guiding the strip along a strip path, a cutting segment of said strip path coinciding with a portion of the blade path and being flanked by an approach segment of the strip path along which a strip may approach the cutting segment in a direction perpendicular to the axis of rotation and a recession segment along which a strip may recede from the cutting segment, said guide means comprising a pair of spaced guide plates defining between them the approach segment of the strip path; a stationary cutter; a continuous stationary cutter edge on the stationary cutter, said stationary cutting edge when in a cutting position coinciding with the cutting segment of the blade path and extending from one side of the strip path to the other, said stationary cutting edge extending at all segments along its length in a direction which is non-parallel to the axis of rotation of the rotary cutter blade; and feed means for feeding a strip along the strip path at a speed equal to the peripheral speed of the rotary blade edge during engagement of said rotary blade edge with the strip.
Claim 3
Dependent Claim
55 words
The device of claim 1 wherein the convex side of the cutting portion of the strip path is at least partially defined by the stationary cutter and the concave side of the cutting portion of the strip path during the advance of the strip prior to a cutting operation is free of moving support elements.
Claim 4
Dependent Claim
34 words
The device of claim 1 comprising support means for supporting the stationary cutter edge for motion away from the cutting position and biasing means for resiliently biasing the cutter edge into the cutting position.
Claim 5
Dependent Claim
38 words
The device of claim 3 wherein the support means comprises pivot means about which the stationary cutter can rotate and the biasing means comprises a spring extending between the stationary cutter and a fixed part of the device.
Claim 6
Dependent Claim
419 words
A rotary cutter device for cutting a strip of sheetlike material along a cutting line extending perpendicular to the side of said strip, said device comprising a rotary cutter blade having an axis of rotation and a rotary blade edge extending parallel to said axis of rotation, said rotary blade edge sweeping out a blade path in the form of a right circular cylinder during rotation of the rotary cutter blade; guide means for guiding the strip along a strip path, a cutting segment of said strip path coinciding with a portion of the blade path and being flanked by an approach segment of the strip path along which a strip may approach the cutting segment in a direction perpendicular to the axis of rotation, said approach segment being defined by a pair of spaced guide plates, and a recession segment along which a strip may recede from the cutting segment, the convex side of the cutting portion of the strip path being at least partially defined by a stationary cutter and the concave side of the cutting portion of the strip path during the advance of the strip prior to a cutting operation is free of moving support elements; a stationary cutter edge on the stationary cutter, said stationary cutting edge when in a cutting position coinciding with the cutting segment of the blade path and extending from one side of the strip path to the other, said stationary cutting edge extending at all segments along its length in a direction which is nonparallel to the axis of rotation of the rotary cutter blade; support means comprising pivot means about which the stationary cutter can rotate for supporting the stationary cutter edge for motion away from the cutting position; biasing means comprising a spring extending between the stationary cutter and a fixed part of the device for resiliently biasing the cutter edge into the cutting position; and feed means for feeding a strip along the strip path at a speed equal to the peripheral speed of the rotary blade edge during engagement of said rotary blade edge with the strip, said feed means comprising a rotatable drive roller positioned to engage a strip in the approach segment of the strip path and means for synchronizing the rotation of said feed roller with the rotation of the rotary cutter during motion of the rotary cutter blade in the cutting segment of the strip path and thereby producing identical peripheral speeds of the drive roller and the rotary cutter blade.
Claim 7
Dependent Claim
419 words
A rotary cutter device for cutting a strip of sheetlike material along a cutting line extending perpendicular to the side of said strip, said device comprising a rotary cutter blade having an axis of rotation and a rotary blade edge extending parallel to said axis of rotation, said rotary blade edge sweeping out a blade path in the form of a right circular cylinder during rotation of the rotary cutter blade; guide means for guiding the strip along a strip path, a cutting segment of said strip path coinciding with a portion of the blade path and being flanked by an approach segment of the strip path along which a strip may approach the cutting segment in a direction perpendicular to the axis of rotation, said approach segment being defined by a pair of spaced guide plates, and a recession segment along which a strip may recede from the cutting segment, the convex side of the cutting portion of the strip path being at least partially defined by a stationary cutter and the concave side of the cutting portion of the strip path during the advance of the strip prior to a cutting operation is free of moving support elements; a stationary cutter edge on the stationary cutter, said stationary cutting edge when in a cutting position coinciding with the cutting segment of the blade path and extending from one side of the strip path to the other, said stationary cutting edge extending at all segments along its length in a direction which is nonparallel to the axis of rotation of the rotary cutter blade; support means comprising pivot means about which the stationary cutter can rotate for supporting the stationary cutter edge for motion away from the cutting position; biasing means comprising a spring extending between the stationary cutter and a fixed part of the device for resiliently biasing the cutter edge into the cutting position; and feed means for feeding a strip along the strip path at a speed equal to the peripheral speed of the rotary blade edge during engagement of said rotary blade edge with the strip, said feed means comprising a rotatable drive roller positioned to engage a strip in the approach segment of the strip path and means for synchronizing the rotation of said feed roller with the rotation of the rotary cutter during motion of the rotary cutter blade in the cutting segment of the strip path and thereby producing identical peripheral speeds of the drive roller and the rotary cutter blade.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |