Document feeding and printing apparatus
US4688481A · kind A · utility
5Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 5, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | May 5, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F13/0045
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A document printer in which a print drum is driven by a direct current electric motor whose voltage is controlled by a first voltage regulator circuit for supplying a first voltage to the motor during a non-printing operating condition and a voltage boost circuit for supplying a higher voltage to the motor during a printing operating condition so that the same document feed rate is maintained throughout the operation of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.