US3554347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for automatically setting a position counter to effect agreement with the position of a traveling printing element
Assignee: Unisys Corp
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Filing: 1968-04-29
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Granted: 1971-01-12
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Expires: 1988-04-29
Abstract
Abstract A system for synchronizing the lateral movement of a printing element with an electronic position counter. A pulse generator is operatively connected to a printing element drive motor to generate a pulse at each printing position. The pulses from the pulse generator are supplied via an amplifier to a comparator circuit which is periodically tested for a voltage level change in the amplifier output. When the level has not changed for a predetermined time due to the arrested movement of the printing element, the electronic position counter is set to a predetermined number corresponding to the present position of the printing element.
Inventors
- 👤 Cornelius C Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
In printing apparatus: printing means movable along a path of travel having spaced apart printing positions including opposite end printing positions; an electronic counter normally synchronized with and controlling the positioning of said printing means within the range of said end positions; electrically operated means operatively connected to said printing means to move said printing means along said path of travel; said electrically operated means also being operable to move said printing means beyond one of said end printing positions in response solely to loss of synchronization between said counter and said printing means; a stop member to stop said movement of said printing means at a predetermined position beyond said one end printing position; and a preset switch element responsive to the engagement of said printing means with said stop member to preset the counter at a numerical indication of the said one end printing position thereby establishing synchronization between said printing means and said counter.
Claim 2
Dependent Claim
157 words
In printing apparatus: printing means movable along a path of travel having spaced apart printing positions including opposite end printing positions; an electronic counter normally synchronized with and controlling the positioning of said printing means within the range of said end positions; electrically operated means operatively connected to said printing means to move said printing means along said path of travel; said electrically operated means also being operable to move said printing means beyond one of said end printing positions in response solely to loss of synchronization between said counter and said printing means; a stop member to stop said movement of said printing means at a predetermined position beyond said one end printing position; and a preset switch element responsive to the engagement of said printing means with said stop member to preset the counter at a numerical indication of the said one end printing position thereby establishing synchronization between said printing means and said counter.
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |