Variable impact printing means
US4493253A · kind A · utility
4Cited by
12References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1983 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Nov 23, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J9/48
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A variable impact printing mechanism includes a supporting magnetic structure having a plurality of circumferential coils mounted thereon and having a central bore in which a magnetic hammer element is positioned for linear movement to cooperate with a type member positioned adjacent to one end of the bore in order to effect printing on a record member positioned between the hammer and the type member. A controller is provided to energize drivers for the various coils in predetermined sequences to vary the velocity achieved by the hammer element at the end of its printing movement in accordance with varying printing requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.