Developing cartridge and an electrophotographic image forming apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorsByung-sun Ahn, Sang-cheol Park, Young-min Kim
Life of this patent
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Abstract
A developing cartridge includes a casing having a toner chamber, a feeding roller installed within the toner chamber, a developing roller supplied with a toner from the feeding roller, and a sealing film interposed between the developing roller and the feeding roller. The sealing film blocks a movement of the toner toward a gap between the developing roller and a bottom of the toner chamber, so that the toner does not leak out through the gap between the developing roller and the bottom of the toner chamber.
Claims35
A developing cartridge comprising:
- a casing having a toner chamber;
- a feeding roller installed within the toner chamber;
- a developing roller supplied with a toner from the feeding roller;
- and
- a sealing film interposed between the developing roller and the feeding roller.
An electrophotographic image forming apparatus comprising:
- a casing having a toner chamber;
- a feeding roller installed within the toner chamber;
- a developing roller supplied With a toner from the feeding roller;
- a photoconductive body to which the toner developed by the developing roller is deposited;
- a transfer roller to transfer the toner deposited on the developing roller onto a fed paper;
- a sealing film interposed between the developing roller and the feeding roller;
- a sealing film detection device to detect the sealing film by sensing an exposed part of the sealing film;
- and
- a control device to control components of the image forming apparatus and to control a printing operation.
A developing cartridge comprising:
- a casing having a toner chamber filled with a toner, and having an opening formed on the toner chamber;
- a feeding roller disposed in the toner chamber;
- a developing roller disposed in the opening of the toner chamber to communicate with the feeding roller;
- and
- a sealing film to prevent migration of the toner from the feeding roller to the developing roller.
An image forming apparatus comprising:
- an image forming apparatus body;
- a developing cartridge removably installable in the image forming apparatus body, and comprising a casing having a toner chamber filled with a toner and having an opening formed on the toner chamber, a feeding roller disposed in the toner chamber, a developing roller disposed in the opening of the toner chamber to communicate with the feeding roller, and a sealing film to prevent migration of the toner from the feeding roller to the developing roller;
- a sealing film detection device to detect the sealing film exposed from the developing cartridge to generate a detection signal;
- and
- a control device to control a printing operation according to the detection signal.
Dependencies are inferred from the claim text.