Patent ID: 8002272
Filing Date: 2011-08-23
Classification: G03G

Abstract:
1. A sheet conveying apparatus having a first sheet conveying portion and a second sheet conveying portion which absorbs a sheet by air and conveys the sheet to the first sheet conveying portion, wherein the second sheet conveying portion includes: an endless belt having a plurality of suction holes; an air suction portion which is provided inwardly of the endless belt, has an opening for air suction, and takes in air through the suction holes of the endless belt and the opening so as to absorb the sheet onto the endless belt; a detection portion which is provided between the first sheet conveying portion and the second sheet conveying portion and detects the sheet conveyed by the second sheet conveying portion; a shutter which partially opens and closes the opening; and an opening/closing portion which opens and closes the shutter and the opening/closing portion is driven so as to move the shutter to the position closing the opening according to the detection of the sheet leading end by the detection portion and to move the shutter to the position opening the opening according to the detection of the sheet trailing end by the detection portion, wherein when the sheet having a sheet conveying direction length in which a sheet trailing end reaches the endless belt before a sheet leading end reaches the first sheet conveying portion, at least part of the portion of the opening through which the sheet trailing end passes before the sheet leading end reaches the first sheet conveying portion is closed by the shutter.