Drop quality control system for jet printing
US5418557A · kind A · utility
28Cited by
11References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1991 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Oct 3, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/195
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are disclosed for controlling the flight time and composition of a marking fluid used in a continuous jet marking system. A three-way valve permits switching between fresh ink and system ink supplies. Periodically a comparison of pressure required to maintain a constant drop flight time is made by a controller. Because both supplies are in the same operating environment any difference in pressure is due to a change in system ink viscosity. Solvent is added, if necessary, to the system ink via a pump to restore viscosity to desired values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.