Patent ID: 7416182

Claim:
A paper skew correcting device, comprising: first and second driving rollers disposed on the left and right sides of a paper conveying route; and first and second driven rollers with narrow contact surfaces disposed opposite to the first and second driving rollers via the conveying route in which the first and second driving rollers touch the first and second driven rollers, respectively, and papers are pinched by their left and right sides and are fed, wherein one of either the first or second driving rollers is formed in a tapered roller with a tapered outer peripheral surface and its rotation shaft is provided aslant in such a way that the contact part of the tapered roller is almost parallel with the conveying route, and by laterally moving one of either the first or second driven rollers disposed opposite to the tapered roller, according to the skew angle of the conveyed papers, in order to change its contact position with the tapered roller, whereby the feeding speed of the left or right side of the papers can be accelerated or decelerated to correct the paper skew.