US3992991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-rotating handwheel
Assignee: AB Dick Co
•
Filing: 1975-06-19
•
Granted: 1976-11-23
•
Expires: 1995-06-19
Abstract
Abstract A rotary duplicator includes a handwheel for manually moving the cylinders to insert and remove masters, to make adjustments, etc. To minimize risk to the operator when the machine is running, there is provided a means for disconnecting the handwheel automatically and holding it stationary whenever the machine is turned on.
Inventors
- 👤 Robert M. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:28
CPC Classifications
B; B41; B41F; B41F13/00; B41L; B41L17/00; B41L17/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
A rotary duplicator comprising: a rotary printing cylinder; power means including a rotary shaft for driving the cylinder; a handwheel rotatably mounted adjacent said shaft; clutch means continuously drivingly connected to said handwheel and shiftable into and out of driving engagement with said shaft; control means for starting and stopping the power means; spring means urging said clutch means towards driving engagement with the shaft; electromagnetic means for moving said clutch means to a position out of driving engagement with the shaft and holding the same in such position in opposition to said spring means; and means responsive to activation of said control means to starting condition for energizing said electromagnetic means, and responsive to activation of said control means to stopping condition for deenergizing said electromagnetic means.
Claim 2
Dependent Claim
128 words
A rotary duplicator comprising: a rotary printing cylinder; power means including a rotary shaft for driving the cylinder; a handwheel rotatably mounted adjacent said shaft; clutch means continuously drivingly connected to said handwheel and shiftable into and out of driving engagement with said shaft; control means for starting and stopping the power means; spring means urging said clutch means towards driving engagement with the shaft; electromagnetic means for moving said clutch means to a position out of driving engagement with the shaft and holding the same in such position in opposition to said spring means; and means responsive to activation of said control means to starting condition for energizing said electromagnetic means, and responsive to activation of said control means to stopping condition for deenergizing said electromagnetic means.
Claim 3
Dependent Claim
35 words
A rotary duplicator as set forth in claim 1 which includes brake means positioned to coact with the clutch means when the latter is held out of engagement with said shaft by said electromagnetic means.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |