Misfeed detector for copy machine
US4244648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | May 30, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S271/902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A jam detector for use in a plain paper copying machine of the type in which the copy paper to which the image has been transferred from the surface of a photoconductive drum is removed from the drum by a pick-off element which acts on a narrow strip of the copy paper extending rearwardly from the leading edge of the paper along one side edge thereof wherein the leading edge of a narrow or skewed or otherwise misdirected copy paper which misses the pick-off element is engaged by a jam detector element positioned in the path of the paper a predetermined distance inboard of the pick-off element to cause the jam detector element to disable the machine and to illuminate the jam indicating signal light. The arrangement is such that the machine cannot be reset for the next operation until such time as the jammed copy paper is removed from the machine. In an alternate embodiment, the jam detector element directs the sheet which has missed the pick-off element to guides which carry the paper back toward the output rolls of the machine which feed the paper back to the usual delivery location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.