Patent ID: 9126790
Filing Date: 2015-09-08
Classification: B65H

Abstract:
1. An image forming apparatus including a plurality of sheet feed trays, comprising: a remaining sheet amount-detecting unit configured to detect a change of a remaining sheet amount level of each of the plurality of sheet feed trays; a remaining sheet count-holding unit configured to hold a remaining sheet count of each of the plurality of sheet feed trays; a sheet feed-detecting unit configured to detect sheet feed from one sheet feed tray, designated by a print job, out of the plurality of sheet feed trays; an updating unit configured to subtract, whenever said sheet feed-detecting unit detects the sheet feed from the designated sheet feed tray, one from the remaining sheet count of the designated sheet feed tray held by said remaining sheet count-holding unit; a correction unit configured to correct, in response to said remaining sheet amount-detecting unit detecting a change of a remaining sheet amount level of the designated sheet feed tray, the remaining sheet count of the designated sheet feed tray, which has been updated by said updating unit, to the remaining sheet count corresponding to the remaining sheet amount level after the change detected by said remaining sheet amount-detecting unit; and a control unit configured to change, in response to the remaining sheet count being corrected by said correction unit, sheet feed trays such that sheets are fed from another sheet feed tray, of which a remaining sheet count is not corrected by said correction unit, the another sheet feed tray being one of the sheet feed trays having sheets set therein, the set sheets being the same in type and size with the sheets set in the designated sheet feed tray, wherein said control unit does not change the sheet feed trays in a case where there is not the another sheet feed tray, of which the remaining sheet count is not corrected by said correction unit, and which is one of trays having the sheets set therein, the set sheets being the same in type and size with the sheets set in the designated sheet feed tray.