摘要:
An image forming apparatus includes: an image bearing body that is rotatable about a central axis thereof, and that bears a dot-like latent image, on a surface of the image bearing body, in each of a plurality of divided regions that are arranged in rows along a direction that intersects an axial direction of the central axis at a predetermined intersection angle; and a developer bearing roller that is rotatable in order to make visible, as a developer image, the dot-like latent images borne by the image bearing body, using a developer borne on a surface of the developer bearing roller, the developer bearing roller opposing the image bearing body such that an axial direction of the developer bearing roller is parallel to the axial direction of the image bearing body, and that includes a helical groove portion on the surface of the developer bearing roller, the helical groove portion being inclined at a predetermined inclination angle with respect to the axial direction of the developer bearing roller and being formed having a uniform pitch in the axial direction, wherein a value that is a tangent of the inclination angle divided by a ratio of a moving speed of the surface of the developer bearing roller to a moving speed of the surface of the image bearing body is different from a tangent of the intersection angle.
摘要:
A toner, has a number mode diameter of 3 μm or more and 6 μm or lower and a particle size distribution of a toner including an externally-applied agent in the range of 0.6 μm to 400 μm in which the number frequency of a toner smaller than the number mode diameter is smaller than the number frequency of a toner equal to or larger than the number mode diameter.
摘要:
A developer carrier has concave portions regularly arranged on the surface thereof and being rotatable with a developer thereon. A contact member is made of an elastic rubber material, is in contact with the surface of the developer carrier, and vibrates with the rotation of the developer carrier. A value obtained by dividing a movement speed of the surface at the time of rotation of the developer carrier by a pitch of the concave portions in a peripheral direction of the developer carrier is smaller than the number of vibrations of the contact member when a loss tangent obtained by dividing a loss elastic modulus of the contact member by a storage elastic modulus is the greatest.
摘要:
A developing device includes: a developing roller on the surface of which intersecting inclined grooves are formed by rolling working; and a seal member which comes into contact with the developing roller, wherein ridge portions of a convex portion surrounded by the inclined grooves of the surface of the developing roller are formed such that rotational resistance due to the contact of the seal member on the downstream side of a rotation direction opposite to a rotation direction of the developing roller at the time of development is larger than rotational resistance due to the contact of the seal member on the downstream side of a rotation direction of the developing roller at the time of development, and at the time of refreshing of the seal member, the developing roller is rotated in the opposite direction to a direction at the time of development.
摘要:
A developing device includes: a developer carrier configured to carry toner; a toner supply member configured to supply developer to the developer carrier; a developing chamber having the developer carrier and the toner supply member; and a sensing device disposed above a toner level in the developing chamber and configured to sense a toner flow.
摘要:
A developer cartridge, including: a container for containing developer; a shutter that is supported so that the shutter can linearly move relative to the container, and that opens and closes by moving linearly; a handle member that is supported so that the handle member can rotationally move relative to the container, and that includes a handle; and a conversion mechanism by which rotational-movement force that rotationally moves the handle member is converted into linear-movement force that linearly moves the shutter.