Method of checking the printing quality of an ink jet printer
US5128691A · kind A · utility
11Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1989 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Aug 21, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/125
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a method for checking the printing quality of an ink jet printer. A control frame is printed independently of a marking message. This frame is, for example, formed of 15 dots of which the charge increases from the first to the fifteenth droplet. The distance (G.sub.1, G.sub.2, G.sub.3) separating, respectively, the droplets (1) and (8), the droplets (8) and (15) and the droplets (1) and (15) are permanently maintained so as to correspond to the two relationships: G.sub.1 G.sub.3 =k.sub.1 and G.sub.2 /G.sub.2 =k.sub.2, where k.sub.1 and k.sub.2 are constants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.