Patent ID: 8328187
Filing Date: 2012-12-11
Classification: B65H

Abstract:
1. A sheet conveying apparatus, comprising: a storage unit that stores in advance first shape information that expresses at least a part of an outer shape of a sheet for which an orientation relative to a conveying direction has been designated; an obtaining unit that obtains second shape information that represents at least the part of the outer shape of the sheet, the sheet being conveyed in a conveying path; a skew amount computing unit that computes a skew amount of the sheet conveyed in the conveying path based on the first shape information and the second shape information; a correction amount computing unit that computes a correction amount for correcting the skew of the sheet relative to the conveying direction from the computed skew amount; and a skew correction unit that corrects a skew angle with an image formed on the sheet and the sheet according to the computed correction amount; the obtaining unit comprising: an image-taking unit that takes an image of the sheet conveyed in the conveying path; a position information determining unit that determines position information that represents the respective positions of at least three characterizing points that represent features of the outer shape of the sheet from the image taken by the image-taking unit; and an angle information determining unit that determines angle information that represents an angle formed by two straight lines obtained when the at least three characterizing points are connected by straight lines; wherein the obtaining unit obtains the position information determined by the position information determining unit and the angle information determined by the angle information determining unit as the second shape information.