Optical sensing of ink jet printing
US4328504A · kind A · utility
55Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1980 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Oct 16, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/125
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Printing of characters in non-impact manner by means of ink droplets which are driven through the nozzle of an inking device is optically sensed and the existence, the position, the size and the condition of each ink spot or mark are determined. The desired printing signals are generated and input in a signal shaping circuit and these signals are compared with the actual signals from the optical sensor and the ink droplet drive means is changed or altered to correct the printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.