Impact type dot printer
US4643596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Sep 17, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/31
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An impact dot printer has a print head which reciprocates back and forth in front of a rotationally driven platen to print dot matrix characters on a recording medium. The print head includes a single print hammer actuated by an electromagnetic driver. A succession of print timing signals are produced in synchronism with the rotational speed of the platen, and a home signal is generated each time the print head leaves its home position during the printing of each line. A control circuit initiates the printing of each line in response to the first print timing signal produced after generation of the home signal and controls the application of driving pulses to the electromagnetic driver so as to synchronize the actuation of the print hammer with the platen rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.