Patent ID: 8205872
Filing Date: 2012-06-26
Classification: B65H

Abstract:
1. A sheet supply device comprising: a sheet placement table for storing a plurality of sheets as a sheet bundle; an elevation section for raising and lowering the sheet bundle stored in the sheet placement table; a blow section for floating a sheet up from the sheet bundle by blowing air to a side surface of the sheet bundle; a sheet conveyance section which applies suction to the sheet which has been floated by air blown by the blow section and conveys the sheet which has been absorbed by the suction one by one in a conveyance direction; a sheet detection sensor provided at a predetermined position of the device so as to detect existence or nonexistence of the sheet at the predetermined position without contact with the sheet; and a control section for controlling the elevation section so as to raise the sheet bundle during an operation of the blow section when a ratio of sheet existence is within a predetermined range or when a frequency of detection is within a predetermined range, wherein the ratio of sheet existence corresponds to a portion of a predetermined time period during which the sheet detection sensor detects sheet existence, and wherein the frequency of detection corresponds to the number of times the sheet detection sensor detects sheet existence during a predetermined time period.