US 7,599,650 B2
	Developer bearing member, developing device, process cartridge and image forming apparatus
Shunji Katoh, Sagamihara (Japan); Katsumi Masuda, Yokohama (Japan); Hideo Yoshizawa, Sagamihara (Japan); Yoshio Hattori, Kawasaki (Japan); Hideki Kimura, Yokohama (Japan); Kiyotaka Sakai, Kawasaki (Japan); Kenji Nakajima, Sagamihara (Japan); Keiichi Yoshida, Kawasaki (Japan); Akira Azami, Yokohama (Japan); and Yuji Suzuki, Ota-ku (Japan)
Assigned to Ricoh Company Limited, Tokyo (Japan)
Filed on Oct. 30, 2006, as Appl. No. 11/554,360.
Claims priority of application No. 2005-321625 (JP), filed on Nov. 04, 2005; application No. 2005-321626 (JP), filed on Nov. 04, 2005; application No. 2005-321627 (JP), filed on Nov. 04, 2005; application No. 2005-321628 (JP), filed on Nov. 04, 2005; application No. 2005-321629 (JP), filed on Nov. 04, 2005; and application No. 2005-345049 (JP), filed on Nov. 30, 2005.
Prior Publication US 2007/0104516 A1, May 10, 2007
Int. Cl. G03G 15/08 (2006.01)

U.S. Cl. 399—279  [399/286]

54 Claims

1. 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°.