Sensor controlling in computer fanfold reproduction
US4320960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1979 |
| Grant date | Mar 23, 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 shut down the system in the event there is a break in the fanfold material during a reproduction run or the end of the document has been attained during normal operation. Sensing devices are utilized in the path of movement of the document and a circuit is provided to produce a train of pulses in accordance with the movement of the document. The frequency of the train of pulses is compared with a reference frequency to insure proper operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.