Developing cartridge
AssigneeBrother Kogyo Kabushiki Kaisha
InventorNaoya Kamimura
Life of this patent
Estimating the term…
Abstract
Even with an extend use of a laser printer, toner leakage can be prevented. A side seal disposed at each end of a developing roller includes a sealing member that makes sliding contact with a surface of the developing roller and a sponge seal that supports the sealing member. The sponge seal includes a base portion and a projecting portion. The base portion has a substantially rectangular shape, to which the sealing member is affixed. The projecting portion projects from the center of the base portion toward the inside of the developing roller along its length, without being caught between a supply roller and the developing roller.
Claims21
A developing cartridge, comprising:
- a housing that accommodates developer therein;
- a supply roller, rotatably supported in the housing, that supplies the developer;
- a developing roller, rotatably supported in the housing, that holds the developer thereon supplied by the supply roller and;
- a side seal provided at both lengthwise ends of the developing roller, wherein the side seal further comprises:
- a sealing element making a sliding contact with a circumferential surface of the developing roller, and
- a seal member including a base portion, that supports the sealing element thereon, and a projecting portion projecting from the base portion toward an end of the developing roller.
A developing cartridge, comprising:
- a housing having opposing sides;
- a developing roller rotatably mounted via a shaft between the opposing sides;
- a supply roller rotatably mounted between the opposing sides, wherein each side wall has an opening for receiving the shaft of the developing roller and a recessed area complementary to a portion of an outer circumference of the developing roller;
- and
- a seal unit comprising:
- a compressible member mounted to the recessed area;
- and
- a seal member overlying at least a central portion, in an axial direction of the developing roller, of the compressible member, wherein an end of the developing roller is pressed by the seal member.
Dependencies are inferred from the claim text.