US3888147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting device for cutting sheets from a roll in a copy machine
Assignee: Olivetti SpA
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Filing: 1974-05-17
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Granted: 1975-06-10
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Expires: 1994-05-17
Abstract
Abstract A roll cutting device in a fed electrostatic copying machine having a bed including a pair of rollers for receiving a roll of copy paper and means attached to the machine for maintaining the roll in a predetermined axial position in the bed, which includes a mechanical knife mechanism for cutting sheets from the roll, and means for insuring that the length of the copy paper cut by the knife mechanism falls between predetermined minimum and maximum lengths.
Inventors
- 👤 Giovanni Ravera
- 👤 Nicola Cosmo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:27
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/08; B26D5/086; G; G03; G03G; G03G15/00; G03G15/65; G03G15/6517; G03G15/6523; Y; Y10; Y10T; Y10T83/00; Y10T83/081; Y10T83/091; Y10T83/093; Y10T83/444; Y10T83/4443; Y10T83/4448; Y10T83/626; Y10T83/869; Y10T83/8776; Y10T83/8778; Y10T83/8782; Y10T83/8784; Y10T83/8785; Y10T83/8786
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
227 words
A cutting device for cutting sheets of paper from a roll in a copying machine comprising: a rotatable cutting member having a cylindrical blade and a substantially helical cutting edge; a movably mounted straight counter blade; means for resiliently biasing said counter blade into contact with said cylindrical blade of said cutting member; a first member mounted for rotation with said rotatable cutting member; spring means for urging said first member in a first rotational direction; latching means for preventing said first member from rotating under the influence of said spring means; selectively actuatable release means for disengaging said latching means from said first member for allowing said first member to rotate under the influence of said spring means for rotating said rotatable member through a cutting stroke; means for resiliently biasing said first member to rotate in a second rotational direction opposite to said first direction, the rotational moment of said biasing means being less than the moment of said spring means; and means actuated by said first member near the end of its stroke for releasing the tension on said spring means to allow said first member to be reset in said second direction by said biasing means in order to open a space between said rotatable cutting member and said counter blade immediately after completion of the cutting stroke of said rotatable cutting member.
Claim 2
Dependent Claim
227 words
A cutting device for cutting sheets of paper from a roll in a copying machine comprising: a rotatable cutting member having a cylindrical blade and a substantially helical cutting edge; a movably mounted straight counter blade; means for resiliently biasing said counter blade into contact with said cylindrical blade of said cutting member; a first member mounted for rotation with said rotatable cutting member; spring means for urging said first member in a first rotational direction; latching means for preventing said first member from rotating under the influence of said spring means; selectively actuatable release means for disengaging said latching means from said first member for allowing said first member to rotate under the influence of said spring means for rotating said rotatable member through a cutting stroke; means for resiliently biasing said first member to rotate in a second rotational direction opposite to said first direction, the rotational moment of said biasing means being less than the moment of said spring means; and means actuated by said first member near the end of its stroke for releasing the tension on said spring means to allow said first member to be reset in said second direction by said biasing means in order to open a space between said rotatable cutting member and said counter blade immediately after completion of the cutting stroke of said rotatable cutting member.
Claim 3
Dependent Claim
40 words
The cutting device of claim 1, wherein said rotatable cutting member is mounted for the axial rotation of said cylindrical blade, said counter blade and the axis of rotation of said cylindrical blade being skewed with respect to one another.
Claim 4
Dependent Claim
42 words
The cutting device of claim 1 further comprising: means for sensing the length of copy paper fed from said roll and for actuating said selectively actuable release means when said length is equal to the length of the original to be copied.
Claim 5
Dependent Claim
42 words
The cutting device of claim 3 further comprising: means for blocking the actuation of said selectively actuable release means until a predetermined length of copy paper has been fed from said roll, independently of the length of the original to be copied.
Claim 6
Dependent Claim
36 words
The cutting device of claim 4 wherein said means for sensing and actuating, actuates said release means after a predetermined maximum amount of said copy paper has been fed, independently of the length of said original.
References Cited (Backward Citations)
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US2642936A
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US3552251A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |