Patent ID: 7984905

Claim:
A sheet conveying apparatus comprising: a first detecting unit that detects a conveyed sheet at a first detecting position; a second detecting unit that detects the conveyed sheet at a second detecting position provided on a downstream in a sheet conveying direction of the first detecting position; a calculation unit that calculates a distance between the first detecting position and the second detecting position based on a time from when a leading edge of the reference sheet is detected by one of the first detecting unit and the second detecting unit until when a trailing edge of the reference sheet is detected by said one of the first detecting unit and the second detecting unit, a time from when one of the leading edge of the reference sheet and the trailing edge of the reference sheet is detected by the first detection unit until when said one of the leading edge of the reference sheet and the trailing edge of the reference sheet is detected by the second detection unit, and the length of the reference sheet.