Dot matrix print head
US4787760A · kind A · utility
3Cited by
15References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Oct 13, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/295
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A moving piezoelectric type crystal element drives a print wire in the direction of a platen and against the resilience of return spring and a rebound spring. A voltage pulse is applied through a conductor and across the piezoelectric element to cause displacement or elongation strain thereof to drive the print wire into impact with the platen and upon impact of the print wire a voltage pulse is generated across the piezoelectric element which generated pulse is recovered through the conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.