Abstract: An interval securing member configured to maintain a distance between an image bearing member and a developer bearing member includes a first image bearing member side contact portion that contacts with the image bearing member upstream in a rotation direction of the image bearing member from a nearest position where the distance between the image bearing member and the developer bearing member becomes the smallest, a first developing side contact portion that contacts with the developer bearing member upstream from the nearest position in a rotation direction of the developer bearing member, a second image bearing member side contact portion that contacts with the image bearing member downstream from the nearest position in the rotation direction of the image bearing member, and a second developing side contact portion that contacts with the developer bearing member downstream from the nearest position in the rotation direction of the developer bearing member

Abstract: An interval guarantee member including: a first image bearing member side sliding portion in sliding-contact with the image bearing member; a first developing side sliding portion in sliding-contact with the developer bearing member; a second image bearing member side sliding contact portion in sliding-contact with the image bearing member; and a second developing side sliding contact portion in sliding-contact with the developer bearing member, wherein the distance between the first image bearing member side sliding contact portion and the first developing side sliding contact portion is longer than that between the second image bearing member side sliding contact portion and the second developing side sliding contact portion, and the first image bearing member side sliding contact portion and the first developer side sliding contact portion come into contact with the image bearing member and the developer bearing member.

Abstract: A developing device includes a developer carrying member that carries developer; a frame member that supports the developer carrying member; a sealing section that faces a peripheral surface of the developer carrying member and suppresses leakage of the developer; and an interval ensuring member that maintains a distance between the image carrying member and the developer carrying member. The interval ensuring member includes a movement regulating portion that prevents movement of the interval ensuring member in a rotation direction of the developer carrying member when the image carrying member and the developer carrying member rotate, and a maintaining portion that contacts the image carrying member and the developer carrying member for maintaining the distance between the image carrying member and the developer carrying member. The maintaining portion and the sealing section are positioned in a predetermined cross section that is orthogonal to an axial line of the developer carrying member.

Abstract: An interval securing member configured to maintain a distance between an image bearing member and a developer bearing member includes a first image bearing member side contact portion that contacts with the image bearing member upstream in a rotation direction of the image bearing member from a nearest position where the distance between the image bearing member and the developer bearing member becomes the smallest, a first developing side contact portion that contacts with the developer bearing member upstream from the nearest position in a rotation direction of the developer bearing member, a second image bearing member side contact portion that contacts with the image bearing member downstream from the nearest position in the rotation direction of the image bearing member, and a second developing side contact portion that contacts with the developer bearing member downstream from the nearest position in the rotation direction of the developer bearing member.

Abstract: A powder feeding mechanism includes: a feeding member, provided under powder, for feeding the powder; and a vibration applying member for applying reciprocating acceleration to the feeding member in a feeding surface direction along a powder feeding surface of the feeding member. Maximum acceleration applied from the vibration applying member to the feeding member in a powder feeding direction is smaller than maximum acceleration applied from the vibration applying member to the feeding member in a direction opposite to the powder feeding direction to feed the powder in the powder feeding direction by the feeding member.

Abstract: A developing apparatus used in an image forming apparatus including a developer bearing member configured to develop a latent image formed on an image bearing member and rotate together with the image bearing member so that opposed surfaces thereof rotate in the same direction, an interval guarantee member configured to maintain a distance between the developer bearing member and the image bearing member by coming into abutment with the developer bearing member and the image bearing member, and a biasing member configured to bias the interval guarantee member toward the upstream side in the direction of rotation of the developer bearing member by applying an elastic force generated by elastic deformation on the interval guarantee member.

Abstract: A developing device includes a developer carrying member that carries developer; a frame member that supports the developer carrying member; a sealing section that faces a peripheral surface of the developer carrying member and suppresses leakage of the developer; and an interval ensuring member that maintains a distance between the image carrying member and the developer carrying member. The interval ensuring member includes a movement regulating portion that prevents movement of the interval ensuring member in a rotation direction of the developer carrying member when the image carrying member and the developer carrying member rotate, and a maintaining portion that contacts the image carrying member and the developer carrying member for maintaining the distance between the image carrying member and the developer carrying member. The maintaining portion and the sealing section are positioned in a predetermined cross section that is orthogonal to an axial line of the developer carrying member.

Abstract: An interval securing member configured to maintain a distance between an image bearing member and a developer bearing member includes a first image bearing member side contact portion that contacts with the image bearing member upstream in a rotation direction of the image bearing member from a nearest position where the distance between the image bearing member and the developer bearing member becomes the smallest, a first developing side contact portion that contacts with the developer bearing member upstream from the nearest position in a rotation direction of the developer bearing member, a second image bearing member side contact portion that contacts with the image bearing member downstream from the nearest position in the rotation direction of the image bearing member, and a second developing side contact portion that contacts with the developer bearing member downstream from the nearest position in the rotation direction of the developer bearing member

Abstract: An interval guarantee member including: a first image bearing member side sliding portion in sliding-contact with the image bearing member; a first developing side sliding portion in sliding-contact with the developer bearing member; a second image bearing member side sliding contact portion in sliding-contact with the image bearing member; and a second developing side sliding contact portion in sliding-contact with the developer bearing member, wherein the distance between the first image bearing member side sliding contact portion and the first developing side sliding contact portion is longer than that between the second image bearing member side sliding contact portion and the second developing side sliding contact portion, and the first image bearing member side sliding contact portion and the first developer side sliding contact portion come into contact with the image bearing member and the developer bearing member.

Abstract: Cones whose rotation axes are substantially parallel to each other and whose sides maintain a constant interval therebetween are provided in a driving force transmission unit to transmit a driving force to a developer feeding member, a roller to transmit the driving force is provided between the cones, a position of the roller is moved in accordance with rotation of one cone or the other, and a rotational speed of the developer feeding member to which the driving force is transmitted from one cone changes with an increase in a number of revolutions of s driving force transmission unit.

Abstract: Cones whose rotation axes are substantially parallel to each other and whose sides maintain a constant interval therebetween are provided in a driving force transmission unit to transmit a driving force to a developer feeding member, a roller to transmit the driving force is provided between the cones, a position of the roller is moved in accordance with rotation of one cone or the other, and a rotational speed of the developer feeding member to which the driving force is transmitted from one cone changes with an increase in a number of revolutions of s driving force transmission unit.

Abstract: A developing apparatus, a process cartridge and an electrophotographic image forming apparatus which can obtain a good image, and an end portion regulating member provided in them. The end portion regulating members for regulating the layer thickness of developer passed through interstices between a developing blade for forming a layer of the developer having a predetermined thickness on the surface of a developing roller and magnetic seals provided on the longitudinally opposite end portions of the developing roller in opposed relationship with the surface of the developing roller is provided downstream of the developing blade with respect to the rotating direction of the developing roller.

Abstract: A developing frame which can improve a sealing property for developer at the end portion of a developing roller. The developing frame has a first frame member having a developer supplying opening provided to supply a developer from a developer containing portion containing the developer to a developing area, a second frame member joined to the first frame member by molten resin, an attachment portion, a seal member for preventing the developer from leaking from the lengthwise end portion of the developing roller being attached to the attachment portion, and a resin reservoir depressed from the joint surface of the first frame member and the second frame member toward the attachment portion, and in which the molten resin is stored.

Abstract: A part is capable of being retained in a guide for retaining a plurality of such parts in such a manner so as to stack the parts in a direction in which gravity act on the parts and supplying parts to a predetermined position. The part has a plurality of abutment portions which come into abutment with an upper-side part in the guide and support the upper-side part, and a plurality of receiving portions with which a plurality of abutment portions provided on a lower-side part in the guide are brought into abutment. The center of gravity of the part is disposed inside a region surrounded by the plurality of abutment portions. Accordingly, it is possible to convey parts to an assembly line without causing damage to the regions of the parts that are required to have dimensional precision.

Abstract: A developing device for developing an electrostatic latent image formed on an electrophotographic photoreceptor includes a hollow developing roller, a support member inserted in the hollow developing roller to support the developing roller, a flange member having a first engaging portion engaging with an outer surface of the support member and a second engaging portion engaging with an inner surface of the developing roller, and a gap-holding member disposed at one end of the developing roller, the gap-holding member having an abutment abutting against the electrophotographic photoreceptor for maintaining a gap between the developing roller and the electrophotographic photoreceptor. The abutment overlaps with the second engaging portion in the longitudinal direction of the developing roller.

Abstract: The present invention provides a developing apparatus comprising a developer bearing member for bearing developer, a spacer provided on a surface at an end portion of the developer bearing member along a longitudinal direction, for maintaining a constant gap between the developer bearing member and an image bearing member for supplying the developer from the developer bearing member, a seal member for regulating leakage of the developer toward the end portion of the developer bearing member along the longitudinal direction, and a developer scraping member provided at a portion overlapping with the seal member along the longitudinal direction of the developer bearing member, contacting the developer bearing member, and wherein the developer bearing member contacts a surface of the spacer.