Patent ID: 9195196
Filing Date: 2015-11-24
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a storage portion storing recording materials; a first conveyance portion conveying a recording material; a first detection unit provided on a downstream side of the first conveyance portion in a conveying direction of the recording material and detecting a leading edge and a trailing edge of the recording material; a second conveyance portion provided on a downstream side of the first detection unit in the conveying direction and conveying the recording material; a second detection unit provided on a downstream side of the second conveyance portion in the conveying direction and detecting the leading edge and the trailing edge of the recording material; a drive portion driving the first conveyance portion and the second conveyance portion; and a control unit controlling the drive portion based on a detecting result obtained by one of the first detection unit and the second detection unit, wherein a first recording material and a second recording material which is conveyed subsequently to the first recording material are conveyed from the storage portion so that a distance between a trailing edge of the first recording material and a leading edge of the second recording material in a conveyance path is a predetermined distance longer than a distance between the first detection unit and the second detection unit in the conveyance path, in a case that the distance between the trailing edge of the first recording material and the leading edge of the second recording material, which is obtained by detecting the trailing edge of the first recording material and the leading edge of the second recording material with the first detection unit, is shorter than the predetermined distance, the control unit controls the drive portion to change a conveyance speed of the second recording material from a predetermined speed to a slower speed after the trailing edge of the first recording material passes through the second detection unit, and in a case that the distance between the trailing edge of the first recording material and the leading edge of the second recording material is longer than the predetermined distance, the control unit controls the drive portion to change the conveyance speed of the second recording material from the predetermined speed to a faster speed before the leading edge of the second recording material reaches the second detection unit.