Fleming-type ink jet head
US5206667A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Sep 6, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A Fleming-type ink jet head in which a group of electrodes constituting one of two rows of a plurality of pairs of electrodes for causing currents to flow across ink channels are integrally formed for the purpose of improving the accuracy with which the pairs of electrodes are relatively positioned as well as reducing the manufacture cost. The resistance between each of the pairs of electrodes is detected and the width or magnitude of a pulse current caused to flow between the electrodes is controlled based on the data of this detection, thereby preventing a deterioration in printing quality due to the non-uniformity of the resistance. Also, the width or magnitude of current pulse is controlled with respect to the positions of the channels to compensate for the non-uniformity of the magnetic field intensity through the channels stacked between magnets, whereby a deterioration in printing quality due to the non-uniformity of the magnetic field intensity is prevented. A circuit for heating the ink in the channels is provided to prevent a deterioration in printing quality due to a change in the viscosity of the ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.