Document feeder, document reader, and image forming apparatus with improved accuracy of document skew correction
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 31, 2013
Grant Date -
Oct 3, 2013
app pub date -
Apr 2, 2013
filing date -
Apr 2, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A document feeder feeds document sheets one by one from a stack on a tray by pressing one or more pick-up rollers against an uppermost document sheet and guiding one widthwise edge of the document sheet. The width direction is perpendicular to a document transport direction. The document feeder includes: a document size obtainer that obtains size information indicating a width of the document sheet; and a center-of-contact shifting mechanism that shifts a center of contact of each pick-up roller along an axial direction of the pick-up roller according to the obtained size information. The center of contact is a central point of an area where the pick-up roller is in contact with the document sheet. Each pick-up roller is in a barrel shape. The center-of-contact shifting mechanism shifts the center of contact of each pick-up roller by axially tilting the pick-up roller relative to the document surface.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully