Dot matrix print head
US4778293A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jul 28, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dot matrix print head has a temperature sensor for detecting the temperature of the print head itself. When the detected temperature exceeds a preset temperature, the temperature sensor produces and output signal for stopping or slowing down the dot matrix print head so that its temperature may be lowered. The temperature sensor is accommodated in a substantially central hole of a radial member mounted in a heat conductor body and having a plurality of circumferentially spaced heat conducting arms with their radially outer ends held intimately against the radially inner surfaces of driver or demagnetizing coils which actuate dot pins. The heat conducting arms can quickly and accurately conduct the heat from the coils to the temperature sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.