Patent ID: 8973919
Filing Date: 2015-03-10
Classification: B65H

Abstract:
1. A recording material detection device comprising: a detection unit configured to detect a plurality of recording materials overlapping one another being conveyed; a first conveyance unit disposed on an upstream side of the detection unit in a conveyance direction of a recording material and configured to convey a recording material; a second conveyance unit disposed on a downstream side of the detection unit in the conveyance direction of the recording material and configured to convey the recording material; a control unit configured to, in a case where a plurality of recording materials overlapping one another being conveyed is detected by the detection unit, control the first conveyance unit so that the plurality of recording materials overlapping one another is stopped before reaching the second conveyance unit; and a determination unit configured to compare a value according to a distance from the detection unit to the second conveyance unit and a value according to a length of the recording material in the conveyance direction and determine detection timing by the detection unit based on a larger one of the values.