Ink jet apparatus
US5657063A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 1993 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Nov 8, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1637
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet apparatus applies a drive voltage to electrodes formed on portions of side walls made of piezoelectric ceramics and varies the internal volumes of grooves adjacent to the side walls using the action of a deformation produced by a piezoelectric thickness/slip effect of the piezoelectric ceramics. Thereby, ink stored inside the grooves is ejected. According to such an ink jet apparatus, a void ratio of the piezoelectric ceramic is 10% or less, and an average crystal grain diameter of the piezoelectric ceramics is 10 .mu.m or less. Further, a variation in a ratio d.sub.15 /S.sub.E44 of a piezoelectric constant d.sub.15 of the piezoelectric ceramic to an elastic compliance S.sub.E44 thereof between the side walls falls within 4. A ratio H/W of a height H of each side wall to a width W thereof ranges from above 2 to below 9, and a ratio d.sub.15 /S.sub.E44 of a piezoelectric constant d.sub.15 of the piezoelectric ceramic to an elastic compliance S.sub.E44 thereof is 10 or more. It is thus possible to provide an ink jet apparatus having excellent durability and high reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.