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US 6,164,643 AGranted
Lateral paper position correcting mechanism
AssigneeKyocera Mita Corporation
InventorMasao Otsuka
Life of this patent
Estimating the term…
Abstract
A paper path is provided with a paper guide for guiding paper, an oblique roller for obliquely moving the paper toward the paper guide and an electromagnetic clutch allowing and interrupting transmission of a rotating force to the oblique roller. Sensors for detecting the paper are provided upstream and downstream of the oblique roller. Also provided in the paper path is a controller which controls the electromagnetic clutch in accordance with paper sensing operation of the sensors to drive the oblique roller while the paper is passing under the oblique roller. A low-friction paper guiding surface is formed on the paper guide by coating it with a fluoroplastic.
Claims21
A lateral paper position correcting mechanism comprising:
- a paper aligning member mounted in a paper path parallel to a paper feeding direction;
- an oblique roller for moving paper at an oblique angle to the paper feeding direction to cause the paper to come into contact with said paper aligning member to correct the position of the paper in said paper path in its lateral direction;
- a paper sensor capable of detecting the paper at least while the paper is passing by said oblique roller;
- a driving controller which drives said oblique roller while the paper is being detected by said paper sensor;
- and
- preventing means for preventing the paper from bending while it is being transferred, said preventing means comprising a contact surface on said paper aligning member which is contacted by said paper, said contact surface comprising a fluoroplastic material.
3 more elements
A lateral sheet position correcting mechanism for correcting positioning of a sheet moving in a feeding direction comprising:
- a sheet aligning unit comprising a pair of pulleys and an endless belt mounted on said pulleys, said endless belt having a linear path portion extending between said pair of pulleys and disposed parallel to said feeding direction;
- an oblique roller for moving a sheet at an oblique angle relative to said feeding direction to thereby impart to the sheet a forward force component for moving said sheet in said feeding direction and a lateral force component for urging said sheet in a lateral direction perpendicular to said feeding direction and toward said linear path portion of said endless belt;
- a controller for driving said oblique rollers as said sheet passes said oblique roller;
- said lateral force component of said driven oblique roller moving said sheet in said lateral direction into contact with said linear path portion of said belt and subsequently continuing to urge said sheet into contact with said linear path portion of said belt until said sheet passes said oblique roller;
- and
- a drive unit for driving one of said pulleys to rotate said endless belt in synchronism with the drive of said oblique roller by said controller to thereby prevent bending of the sheet as the sheet is urged into contact with said linear path portion of said endless belt.
3 more elements
A lateral sheet position correcting mechanism comprising:
- a paper aligning member mounted in a paper path parallel to a sheet feeding direction;
- an oblique roller for moving paper at an oblique angle to the paper feeding direction to cause the paper to come into contact with said paper aligning member to correct the position of the paper in said paper path in its lateral direction;
- a paper sensor capable of detecting the paper at least while the paper is passing by said oblique roller;
- a driving controller which drives said oblique roller while the paper is being detected by said paper sensor;
- and
- a preventing means for preventing the paper from bending while the paper is being transferred, said preventing means including a paper presser arranged in said paper path for pressing the paper being transferred onto a paper feeding plane, said paper presser being constructed such that the paper can easily move a direction toward said paper aligning member but can easily move in the opposite direction.
3 more elements
A lateral sheet position correcting mechanism for correcting positioning of a sheet moving in a feeding direction comprising:
- a sheet aligning unit extending in a direction parallel to said feeding direction;
- an oblique roller for moving a sheet at an oblique angle relative to said feeding direction to thereby impart to the sheet a forward force component for moving said sheet in said feeding direction and a lateral force component for urging said sheet in a lateral direction perpendicular to said feeding direction and toward said sheet aligning unit;
- p1 a controller for driving said oblique roller as said sheet passes said oblique roller;
- said lateral force component of said driven oblique roller moving said sheet in said lateral direction into contact with said sheet aligning unit and subsequently continuing to urge said sheet into contact with said sheet aligning unit until said sheet passes said oblique roller;
- and
- a preventing structure on said sheet aligning unit for preventing bending of the sheet as the sheet is urged into contract with the sheet alignment unit, said preventing structure comprising a low friction material selected from the group consisting of fluoroplastic and polyethylene.
3 more elements
A lateral sheet position correcting mechanism for correcting positioning of a sheet moving in a feeding direction comprising:
- a sheet aligning unit extending in a direction parallel to said feeding direction;
- an oblique roller for moving a sheet at an oblique angle relative to said feeding direction to thereby impart to the sheet a forward force component for moving said sheet in said feeding direction and a lateral force component for urging said sheet in a lateral direction perpendicular to said feeding direction and toward said sheet aligning unit;
- a controller for driving said oblique roller as said sheet passes said oblique roller;
- said lateral force component of said driven oblique roller moving said sheet in said lateral direction into contact with said sheet aligning unit and subsequently continuing to urge said sheet into contact with said sheet aligning unit until said sheet passes said oblique roller;
- and
- a preventing structure on said sheet aligning unit for preventing bending of the sheet as the sheet is urged into contract with the sheet alignment unit, said preventing structure comprising a flexible material.
3 more elements
A lateral sheet position correcting mechanism for correcting positioning of a sheet moving in a feeding direction comprising:
- a sheet aligning unit extending in a direction parallel to said feeding direction;
- an oblique roller for moving a sheet at an oblique angle relative to said feeding direction to thereby impart to the sheet a forward force component for moving said sheet in said feeding direction and a lateral force component for urging said sheet in a lateral direction perpendicular to said feeding direction and toward said sheet aligning unit;
- a controller unit for driving said oblique roller as said sheet passes said oblique roller;
- said lateral force component of said driven oblique roller moving said sheet in said lateral direction into contact with said sheet aligning unit and subsequently continuing to urge said sheet into contact with said sheet aligning unit until said sheet passes said oblique roller;
- and
- a preventing structure on said sheet aligning unit for preventing bending of the sheet as the sheet is urged into contract with the sheet alignment unit, said sheet aligning unit comprising an alignment member and said preventing structure comprising a coating of low friction material on said alignment member.
3 more elements
A lateral sheet position correcting mechanism for correcting positioning of a sheet moving in a feeding direction and wherein the sheet has a sheet length measured in the feed direction, the mechanism comprising:
- feed rollers for feeding a sheet in said feeding direction;
- a sheet aligning unit extending in a direction parallel to said feeding direction;
- an oblique roller for moving a sheet at an oblique angle relative to said feeding direction to thereby impart to the sheet a forward force component for moving said sheet in said feeding direction and a lateral force component for urging said sheet in a lateral direction perpendicular to said feeding direction and toward said sheet aligning unit;
- a sensor at a location upstream of said oblique roller for providing a signal upon sensing the presence of a sheet at said location;
- a controller for initiating driving of said oblique roller upon receiving said signal and for continuing to drive said oblique roller at least until the sheet has passed said oblique roller;
- said feed rollers and said oblique roller being spaced from one another in said feeding direction a distance which is less than said sheet length such that when said controller initiates driving of said oblique roller, said feed roller continues to feed the sheet in the feeding direction and the sheet is thereby moved in said feeding direction by the feed rollers and by the forward force component of the oblique roller while simultaneously being urged in the lateral direction toward said sheet aligning unit by the lateral force component of the oblique roller;
- said lateral force component of said oblique roller moving said sheet in said lateral direction into contact with said sheet aligning unit and subsequently continuing to urge said sheet into contact with said sheet alignment unit prior to the passing of the sheet past said oblique roller;
- said sheet aligning unit including a preventing structure for preventing bending of the sheet as the sheet is urged into contract with the sheet alignment unit.
5 more elements
Dependencies are inferred from the claim text.