Image forming apparatus with smooth transfer sheet roller transp

Details Image forming apparatus with smooth transfer sheet roller transp Image forming apparatus with smooth transfer sheet roller transp

1995-12-08

1997-07-29

Milef, Boris

Sheet feeding or delivering

Feeding

Multiple supplies

271 91, 271242, 27126501, 271270, 399385, 399395, 399396, 399400, B65H 344, B65H 904, B65H 534

Patent

active

056515391

ABSTRACT:
A copying machine that is capable of copying a large-size document original on a transfer sheet is provided in which the transfer sheet is prevented from being skewed from the desired transport path. In one embodiment, this bypass transportation path for a cut-sheet extends to a photoreceptor drum and is provided with a resist roller and a downstream transportation roller. A cut-sheet inserted from a manual sheet feeding section is stopped with its leading edge abutting against the resist roller, so that the leading edge of the cut-sheet is aligned with a line perpendicular to a transportation direction of the sheet. The cut-sheet is then transported by the resist roller and the transportation roller. At this time, the circumferential speed of the resist roller is slower by a predetermined degree than the circumferential speed of the transportation roller. Thus, a predetermined tensile force is constantly applied to the cut-sheet transported from the resist roller to the transportation roller to prevent the cut-sheet from being skewed during transport even when a large-size cut-sheet is used as the transfer sheet. Also, to avoid non-smooth transport of a sheet, the first slower roller, which the transport sheet contacts before contacting the faster second roller, is sped up just before the trailing edge leaves the first roller to avoid roller vibration due to immediate tension release in the sheet.

REFERENCES:
patent: 3863913 (1975-02-01), Hirafuji
patent: 4708456 (1987-11-01), Shibata et al.
patent: 5362041 (1994-11-01), Ryuzaki et al.
patent: 5417413 (1995-05-01), Huffman et al.
patent: 5428431 (1995-06-01), Abe et al.
patent: 5482265 (1996-01-01), Nakazato et al.

Affiliated with

Also associated with

Rating

Image forming apparatus with smooth transfer sheet roller transp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image forming apparatus with smooth transfer sheet roller transp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus with smooth transfer sheet roller transp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-628866