Hammer energy impact control using read only memory
US4103617A · kind A · utility
14Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Jan 10, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J9/48
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In impact printing mechanism for encoding magnetic or optical characters on documents, a hammer energy control is utilized for maintaining constant impact pressure for the various surface areas of such characters. The constant impact pressure is derived by selection of the correct hammer pulse width for the surface area of each character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.