Electronic printer with single tracing element
US4378563A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1981 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | Sep 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The printer comprises a ROM recorded for each character with a set of pairs of numerical instructions, of which one represents the direction of a constant velocity vector of the tracing element for tracing a segment of the character, and the other represents the duration for which that velocity has to be applied to said element. The direction instruction is decoded by a decoder in order to generate two orthogonal components which control two servo-mechanism by way of two corresponding D/A converters. The duration of the movement is controlled by a counter loaded by the duration instruction and decremented by a clock signal. Every time the counter is emptied a logic unit responds by addressing the next byte in the ROM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.