Dot matrix printer/module using print wires having different lenth but equal mass
US4867583A · kind A · utility
6Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1984 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Feb 21, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/25
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dot matrix shuttle printer and/or a module therefore uses print wires of different lengths so as to achieve desired close packing of individual print wire actuators and correspondingly close wire-to-wire spacing of the print wires. To help maintain synchronization between the operation of all print wires, the longer ones include hollow sections so as to cause all the print wires to have substantially equal mass in spite of their differing lengths. The longer print wires include a hollow tube of stainless steel. A tip of wear resistant material is fixedly inserted at one end of the tube to effect impact printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.