Patent attributes
An image forming device includes a removable cartridge holding toner, supplying toner to a developer. The cartridge and developer each include a shutter to retain toner when the cartridge is removed. Upon insertion, the developer abuts the cartridge shutter, and the cartridge abuts the developer shutter, such that movement of the shutter into the image forming device opens both the shutters. Additionally upon insertion, the cartridge shutter releasably engages with the developer, and the cartridge releasably engages with the developer shutter. Upon removing the cartridge, the developer pulls the cartridge shutter closed prior to releasing engagement, and the cartridge pulls the developer shutter closed prior to releasing engagement. The opening and closing of both shutters requires only a single movement by the user: inserting or removing the cartridge from the image forming device.
