Method for attaching electrically conductive sheet to developer sealing member

A mounting method for mounting an electroconductive sheet on a developer seal member for sealing a developer discharging opening provided in a developer accommodating container for accommodating a developer, wherein the electroconductive sheet is provided with an adhesive material on one surface thereof, and a separation sheet is adhered to the one surface, the separation sheet being larger than the electroconductive sheet, said method comprising:

• a suction step of contacting a suction tool to the other surface of the electroconductive sheet, the suction tool being effective to suck air between the other surface and the suction tool to attract the electroconductive sheet thereon;
• an exposure step of separating the separation sheet from the electroconductive sheet while the electroconductive sheet is being sucked by the suction tool, so that the one surface of the electroconductive sheet is exposed;
• and
• a bonding step of bonding, after performing said exposure step, the one surface of the electroconductive sheet to the developer seal member while the electroconductive sheet is being sucked by the suction tool.