Printer with a fixed and an axially movable character ring
US4244291A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1978 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Nov 8, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J1/50
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A serial printer includes two character rings having raised characters disposed therearound. Both rings rotate on a common axis for selection of characters for printing. One character ring is laterally fixed relative to the common axis; the other character ring translates laterally along the common axis in a carriage driven by a pulley and wire, and biased for quick return. A solenoid actuated claw selects characters for printing as the character rings rotate. A single motor operating in a forward direction causes the character rings to rotate while character selections are made, sequentially causes a single hammer to strike both character rings simultaneously for printing on paper, and translates the carriage one position for serially printing the next digit in a number. Reversal of the motor, after a line of characters is printed, causes release and return of the carriage and advancement of the paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.