Ink jet printing apparatus
US4312005A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1980 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Mar 17, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/185
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Minute ink particles are ejected from a nozzle (16) in the form of a stream and electrostatically charged. The widths of pulses fed to an electrode (21) which applies the charge are varied in accordance with a desired printing density. A voltage is applied to a first deflection electrode (23) when it is desired to print a dot to deflect ink particles onto a moving sheet (22). An alternating voltage is applied to a second deflection electrode (27) to deflect the ink particles perpendicular to the deflection direction of the first deflection electrode (23) so as to form a cluster of ink particles on the sheet (22) having a diameter equal to a desired dot size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.