Patent ID: 7546081

Claim:
A paper perforating apparatus, comprising: means for conveying a paper; means for perforating the paper conveyed by the means for conveying; means for detecting an end portion parallel to a conveyance direction of the paper conveyed by the means for conveying; and means for moving the means for perforating in a direction perpendicular to the conveyance direction based on a distance computed based on the end portion detected by the means for detecting, wherein the paper perforating apparatus offsets by a predetermined distance a standby position of the means for perforating, which is in the direction perpendicular to the conveyance direction, from a position in which holes are punched out on the paper, the means for perforating starts an operation of perforation preparation from the standby position after a front end of the paper, which is perpendicular to the conveyance direction, passes the means for perforating, and the means for moving moves the means for perforating from the standby position to a home position based on the distance, after the front end of the paper passes the means for perforating.