Document conveyance apparatus with retractable auxiliary conveyance roller
US5001520A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Oct 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00185
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A document conveyer for conveying a document to a predetermined position on platen glass of a copying machine, including; a document feeder for feeding the document from the outside of the document conveyer to a conveyance roller, located on the platen glass the conveyance roller, for conveying the document onto the platen glass by rotating in the forward direction, and also for subsequently bringing the trailing edge of the document into contact with an edge setting member, located adjacent to the platen glass, by rotating in the reverse direction so that the document is set at the predetermined position on the platen glass, an auxiliary conveyance roller, located on the platen glass, for conveying the document onto the platen glass by functioning with the conveyance roller when the document is longer than a predetermined size, and a roller retractor for retracting the auxiliary conveyance roller from the platen glass so that the auxiliary conveyance roller does not convey the document, in which the auxiliary conveyance roller is retracted from the platen glass by the roller retractor while the document is being brought into contract with the setting edge member by the conveyance …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.