Duplexing in automatic document feeder utilizing a path shorter than the length of the document to be duplexed
US6307614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Dec 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00316
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The footprint of a document scanning unit such as a copier, facsimile machine or document scanner or combinations thereof is reduced by causing overlap of the leading and trailing edges of long document sheets to be scanned in the document delivery roller system downstream of the scanning station. Differential slippage of the overlapping ends between a drive roller and a pinch roller is provided in a first embodiment. A second embodiment uses a moveable pinch roller in the document delivery system to selectively open and close a gap to permit slippage of the leading and trailing edges of the document. A third embodiment uses three document delivery rollers defining two spaced nips in which the leading and trailing edges of a long document are simultaneously present and a crenellated roller surface to guide the leading edge of the document to the desired nip in the delivery system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.