Stepper motor drive system in computer fanfold reproduction
US4313672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1979 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Sep 17, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00227
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An automatic duplicating system in which computer fanfold documents are fed by an automatic handling apparatus having a tractor and drive control system for advancing the document across the platen of the processor for the system. An arrangement is provided which will control operation of the tractor and drive control system, and use is made of a stepper motor having many, small angled rotational movements which can be digitally controlled. A logic circuit arrangement is provided to energize and control the motor so that precise positioning of an edge of each frame section of the fanfold document can be made relative to a platen registration edge. In addition, the logic circuit is adapted to effect acceleration and deceleration of the motor in a controlled sense.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.