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US 11,378,911 B2Granted
Drum unit, cartridge and coupling member
AssigneeCanon Kabushiki Kaisha
InventorsTetsuo Uesugi, Makoto Hayashida, Koji Yamaguchi, Takashi Yano
Life of this patent
Estimating the term…
Abstract
A cartridge includes a photosensitive drum and a coupling member operatively connected to the photosensitive drum, with the coupling member including an arm portion and a projection projecting from the arm portion. The arm portion of the coupling member extends from a point that is upstream in the rotational direction of the photosensitive drum towards a point that is downstream in the rotation direction of the photosensitive drum.
Claims30
A cartridge comprising:
- a casing;
- a photosensitive drum rotatably supported by the casing about a rotational axis of the photosensitive drum;
- a coupling member operatively connected to the photosensitive drum, the coupling member including an arm portion and a projection projecting from the arm portion;
- a cleaning blade configured to remove toner from a surface of the photosensitive drum;
- and
- a charging roller configured to charge the photosensitive drum,
- wherein the photosensitive drum is rotatable such that a part of the surface of the photosensitive drum moves from an upstream position where the part of the photosensitive drum is exposed to outside of the casing to a downstream position where the part of surface of the photosensitive drum is adjacent to the charging roller via an intermediate position where the part of the surface of the photosensitive drum is adjacent to the cleaning blade, and
- wherein the arm portion of the coupling member extends (i) from a point that is upstream in the rotational direction of the photosensitive drum towards a point that is downstream in the rotational direction of the photosensitive drum, and (ii) such that an end of the arm portion that is downstream in the rotational direction of the photosensitive drum is closer to the rotational axis of the photosensitive drum than an end of the arm portion that is upstream in the rotational direction of the photosensitive drum.
5 more elements
A process cartridge comprising:
- a casing;
- toner contained in the casing;
- a photosensitive drum rotatably supported by the casing about a rotational axis of the photosensitive drum;
- a coupling member operatively connected to the photosensitive drum, the coupling member including an arm portion and a projection projecting from the arm portion;
- a developing roller configured to develop a latent image formed on a surface of the photosensitive drum with the toner;
- a cleaning blade configured to remove toner from the surface of the photosensitive drum;
- and
- a charging roller configured to charge the photosensitive drum,
- wherein the photosensitive drum is rotatable such that a part of the surface of the photosensitive drum moves from an upstream position where the part of the surface of the photosensitive drum is exposed to outside of the casing to a downstream position where the part of surface of the photosensitive drum is adjacent to the charging roller via an intermediate position where the part of the surface of the photosensitive drum is adjacent to the cleaning blade, and
- wherein the arm portion of the coupling member extends (i) from a point that is upstream in the rotational direction of the photosensitive drum towards a point that is downstream in the rotational direction of the photosensitive drum, and (ii) such that an end of the arm portion that is downstream in the rotational direction of the photosensitive drum is closer to the rotational axis of the photosensitive drum than an end of the arm portion that is upstream in the rotational direction of the photosensitive drum.
7 more elements
Dependencies are inferred from the claim text.