Sheet supplying device and sheet processing device using detecting lever
AssigneeCanon Kabushiki Kaisha
InventorYuji Kanome
Life of this patent
Estimating the term…
Abstract
A sheet supplying device has a sheet delivering roller for delivering sheets one by one; a feeding roller for feeding the sheet delivered by the sheet delivering roller; a pinch roller urged by the feeding roller to be rotated by the feeding roller; a detecting lever swingable by being contacted by a leading of the sheet delivered by the sheet delivering roller; and a sensor for detecting the swing motion of the detecting lever. An area of said detecting lever to which the leading end of the sheet is contactable is such a curved surface that a distance from a nip between the feeding roller and the pinch roller is substantially constant.
Claims7
A sheet supplying device comprising:
- a sheet delivering roller for delivering sheets one by one;
- a sheet feeding roller for feeding the sheet delivered by said sheet delivering roller;
- a pinch roller urged by said feeding roller to be rotated by said feeding roller;
- a detecting lever swingable by being contacted by a leading end of the sheet delivered by said sheet delivering roller;
- and
- a sensor for detecting the swing motion of said detecting lever;
- wherein an area of said detecting lever to which the leading end of the sheet is contactable is such a curved surface that a distance from a nip between said feeding roller and said pinch roller to the area of said detecting lever is substantially constant;
- wherein the curved surface has a finite radius.
A recording device comprising:
- a recording station for effecting recording on a sheet by a recording unit;
- a sheet delivering roller for delivering sheets one by one;
- a feeding roller for feeding the sheet delivered by said sheet delivering roller toward said recording station;
- a pinch roller urged by said feeding roller to be rotated by said feeding roller;
- a detecting lever swingable by being contacted by a leading end of the sheet delivered by said sheet delivering roller;
- and
- a sensor for detecting the swing motion of said detecting lever;
- wherein an area of said detecting lever to which the leading end of the sheet is contactable is such a curved surface that a distance from a nip between said feeding roller and said pinch roller to the area of said detecting lever is substantially constant;
- wherein the curved surface has a finite radius.
Dependencies are inferred from the claim text.