Lateral position control means for data printer heads
US4195938A · kind A · utility
11Cited by
6References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1977 |
| Grant date | Apr 1, 1980 |
| Priority date | — |
| Expiry date | Feb 9, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J19/205
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A rotary encoder is coupled to the drive for a printing head to detect and encode movement of the drive and produce signals therefrom which are used to control the direction and positioning of the printing head. A rotating disc-like wheel in the encoder has a plurality of peripheral window openings which act in conjunction with a light source and detector to produce a signal train from which the movement and instantaneous location of the printing head is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.