US4157671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive for cutting rollers of paper shredding or cutting apparatus
Assignee: Schleicher and Co International AG
•
Filing: 1978-04-06
•
Granted: 1979-06-12
•
Expires: 1998-04-06
Abstract
Abstract A drive for paper shredding or cutting apparatus having two counter-rotating cutting rollers each carrying a plurality of cutting knives, the knives of each roller being in engagement. Each roller is independently driven by an induction motor through a direct gear drive.
Inventors
- 👤 Albert Goldhammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:07
CPC Classifications
B; B23; B23D; B23D19/00; B23D19/04; B23D19/06; B02; B02C; B02C18/00; B02C18/0007; B02C18/06; B02C18/16; B02C18/24; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/24; B26D1/245; B02C2018/0023; B02C2018/0038; B02C2018/164; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4836; Y10T83/647; Y10T83/6584; Y10T83/6587; Y10T83/6588; Y10T83/768; Y10T83/7793; Y10T83/7797
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
In a drive for a paper cutting or shredding mechanism including two counter-rotating cutting rollers respectively having cutting knives thereon in cutting engagement with each other, said rollers being mounted in a frame for rotation about spaced, parallel, fixed axes, the improvement comprising: two alternating current motors coupled in parallel across a source of alternating current, said motors having substantially identical speed-torque characteristics, and gearing means drivingly connecting each motor to a respective roller for independently driving the same whereby an overload condition on one roller and its respective motor results in equalizing the load between both motors.
Claim 2
Dependent Claim
98 words
In a drive for a paper cutting or shredding mechanism including two counter-rotating cutting rollers respectively having cutting knives thereon in cutting engagement with each other, said rollers being mounted in a frame for rotation about spaced, parallel, fixed axes, the improvement comprising: two alternating current motors coupled in parallel across a source of alternating current, said motors having substantially identical speed-torque characteristics, and gearing means drivingly connecting each motor to a respective roller for independently driving the same whereby an overload condition on one roller and its respective motor results in equalizing the load between both motors.
Claim 3
Dependent Claim
11 words
The drive of claim 1 wherein said motors are induction motors.
Claim 4
Dependent Claim
20 words
The drive of claim 2 wherein said source is single phase, and said motors are of the single phase type.
Claim 5
Dependent Claim
47 words
The drive of claim 3 wherein each of said motors has a two phase field winding, and further comprising a single capacitor, and means for coupling said capacitor in series with one phase of the field winding of each motor thereby to provide a permanent-split capacitor motor.
Claim 6
Dependent Claim
13 words
The drive of claim 4 wherein said coupling means includes a reversing switch.
Claim 7
Dependent Claim
20 words
The drive of claim 1 further comprising means for relatively moving said rollers axially thereby to adjust said cutting knives.
References Cited (Backward Citations)
US1907596A
Cited
US2086476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |