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AssigneeRicoh Company, Ltd.
InventorsShunji Katoh, Katsumi Masuda, Hideo Yoshizawa, Yoshio Hattori, Hideki Kimura, Kiyotaka Sakai, Kenji Nakajima, Keiichi Yoshida, Akira Azami, Yuji Suzuki
Estimating the term…
A developer bearing member on which grooves slanting in a thrust direction of the developer bearing member cross other grooves reversely slanting relative to the thrust direction, wherein each of the grooves and the reversely slanting grooves is slanting at an angle of greater than 0° and not greater than 40°. Any two adjacent intersections of the grooves and the reversely slanting grooves in the thrust (or peripheral) direction are preferably on different levels in the peripheral (or thrust) direction. The distance between two adjacent intersections in the thrust direction is preferably from 1.3 mm to 4.8 mm. The distance between two adjacent intersections in the thrust direction is preferably from 0.38 Vd/Vi (mm) to 1.1 Vd/Vi (mm). The deviation in depth of grooves present on a 36° arc surface portion of the member is not greater than 15% of the gap between the image bearing member and the developer bearing member.
A developer bearing member for bearing a developer including a toner while rotating to visualize a latent image on a surface of a rotating latent image bearing member using the developer, said developer bearing member having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein each of the plural grooves and the reversely slanting plural grooves is slanting at an angle of greater than 0° and not greater than 40°.
A developer bearing member for bearing a developer including a toner while rotating to visualize a latent image on a surface of a rotating latent image bearing member using the developer, said developer bearing member having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein a distance (a) between any two adjacent intersections of the plural grooves and the reversely slanting plural grooves in the trust direction is from 1.3 mm to 4.8 mm, and wherein a distance (b) between any two adjacent intersections of the plural grooves and the reversely slanting plural grooves in a peripheral direction of the developer bearing member satisfies the following relationship:
A developer bearing member for bearing a developer including a toner, having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein any two adjacent intersections of the plural grooves and the reversely slanting plural grooves in the thrust direction of the developer bearing member are on different levels in a peripheral direction of the developer bearing member.
A developer bearing member for bearing a developer including a toner, having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein any two adjacent intersections of the plural grooves and the reversely slanting plural grooves in a peripheral direction of the developer bearing member are on different levels in the thrust direction of the developer bearing member.
A developer bearing member for bearing a developer including a toner, having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein a distance (a) between any two adjacent intersections of the plural grooves and the reversely slanting plural grooves in the trust direction is from 1.3 mm to 4.8 mm.
A developer bearing member for bearing a developer including a toner while rotating to visualize a latent image on a surface of a rotating latent image bearing member using the developer, said developer bearing member having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein a distance (b) between any two adjacent intersections of the plural grooves and the reversely slanting plural grooves in a peripheral direction of the developer bearing member satisfies the following relationship:
A developer bearing member for bearing a developer including a toner while rotating to visualize a latent image on a surface of a rotating latent image bearing member using the developer, said developer bearing member having a surface on which grooves are formed such that plural grooves slanting in a thrust direction of the developer bearing member cross other plural grooves reversely slanting relative to the thrust direction, wherein a difference between a maximum value and a minimum value of depth of grooves of the plural grooves and the reversely slanting plural grooves present on an arc surface portion of a cross section of the developer bearing member is not greater than 15% of a gap between the latent image bearing member and the developer bearing member, wherein a sector formed by a center of the cross section and the arc surface portion has an angle of 36°.
Dependencies are inferred from the claim text.