Patent ID: 11884506
Assignee: PFU LIMITED
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. A method for correcting a skew of a medium, comprising:
feeding a medium by a plurality of feed rollers spaced in a direction perpendicular to a medium conveying direction, each feed roller rotating independently at a respective speed to feed the medium;
detecting the medium by a first sensor located on a downstream side of the plurality of feed rollers in the medium conveying direction and also in a central part in the direction perpendicular to the medium conveying direction;
detecting the medium by a second sensor and a third sensor located on both sides of the first sensor in the direction perpendicular to the medium conveying direction; and
changing the speed of one of the plurality of feed rollers at least until the first sensor detects the medium when any of the second sensor or the third sensor detects the medium and the first sensor does not detect the medium within a predetermined time.