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A latent electrostatic image developing device, including a cartridge loading section having an open top and a toner cartridge adapted to be removably loaded into the cartridge loading section. The cartridge loading section includes a pair of upwardly facing supporting shoulder surfaces extending lo

A latent electrostatic image developing device, including a cartridge loading section having an open top and a toner cartridge adapted to be removably loaded into the cartridge loading section. The cartridge loading section includes a pair of upwardly facing supporting shoulder surfaces extending longitudinally in laterally spaced-apart relationhsip, guiding side surfaces rising respectively from the outside edges of the shoulder surfaces, and a guiding rear surface extending between the rear ends of the guiding side surfaces. The guiding side surfaces respectively having holding protrusions provided at their front end portions. Engaging protrusions are provided behind of the holding protrusions at a predetermined distance therefrom. The toner cartridge includes a loading flange having side flange portions disposed in correspondence to the pair of shoulder surfaces and a closing member extending above the loading flange while surrounding both sides and the rear end thereof. The closing member is formed of a flexible material such as sponge rubber and extends beyond the outside edge of the loading flange.

대표청구항 ▼

A toner cartridge adapted to be removably loaded into a cartridge loading section of a latent electrostatic image developing device, said toner cartridge comprising a box-like main portion having a rectangular upper wall, two side walls extending downwardly from the two side edges of said upper wall

A toner cartridge adapted to be removably loaded into a cartridge loading section of a latent electrostatic image developing device, said toner cartridge comprising a box-like main portion having a rectangular upper wall, two side walls extending downwardly from the two side edges of said upper wall, a front and a rear wall extending downwardly from the front and rear edges of said upper wall, the lower surface of said main portion being opened, toner held in said main portion, a sealing member for releasably sealing said lower surface of said main portion, and a closing member formed of a flexible material and extending while surrounding at least the outside surfaces of said two side walls and said rear wall to intimately contact the side walls of the cartridge loading section when said toner cartridge is inserted thereinto.