Patent ID: 9733591
Date: 2017-08-15
CPC Classifications: G03G

Claim:
1. An image forming apparatus for forming a toner image on a sheet, said image forming apparatus comprising: a main assembly; a first unit including a toner discharge opening; a second unit including a toner receiving opening, wherein at least one of said first unit and said second unit is detachably mountable to said main assembly; and a shutter configured to permit toner to move from said first unit into said second unit in a state that the toner discharge opening of said first unit is above the toner receiving opening of said second unit when said at least one of said first unit and said second unit are set in said main assembly, and to close said toner discharge opening of said first unit when said at least one of said first unit and said second unit is removed from said main assembly, wherein said main assembly includes a shutter opening member configured to open said shutter, and wherein insertion of said at least one of said first unit and said second unit into said main assembly causes contact with said shutter opening member and rotates said shutter opening member such that said shutter is moved to a position above part of a sealing member for said toner receiving opening, and thereafter, said shutter is opened by a further insertion of said at least one of said first unit and said second unit into said main assembly.