초록 ▼

An image forming device which allows reducing a linear velocity ratio of a developing roller against a sensitive body, which enables a pole pitch of a magnetic field generating layer to be miniaturized, and which generates a uniform and adequately thick toner layer on the developing roller. A toner

An image forming device which allows reducing a linear velocity ratio of a developing roller against a sensitive body, which enables a pole pitch of a magnetic field generating layer to be miniaturized, and which generates a uniform and adequately thick toner layer on the developing roller. A toner regulating element formed by a sheet metal material having elasticity and non-magnetic characteristics elastically contacts a surface of the developing roller. The developing roller has an elastic body layer and a magnetic field generating layer having a minute pole pitch. The toner regulating elements serves to regulate a thickness of the toner layer without vibration induced from the pole pitch of the magnetic field generating layer. Thus, the toner layer can be uniform and of an adequate thickness, and reducing the linear velocity ratio of the developing roller against the sensitive body does not generate any drawbacks.

대표청구항 ▼

[ What is claimed as new and is desired to be secured by Letters Patent of the United States is:] [17.] An image forming device comprising:an electrophotoconductive means on which an electrostatic latent image is formed;a developing means including an elastic body and a magnetic field generating mea

[ What is claimed as new and is desired to be secured by Letters Patent of the United States is:] [17.] An image forming device comprising:an electrophotoconductive means on which an electrostatic latent image is formed;a developing means including an elastic body and a magnetic field generating means overlying said elastic body and having a predetermined pitch of magnetic poles, for contacting said electrophotoconductive means at a contacting section and developing said electrostatic latent image by conveying toner to a surface of said electrophotoconductive means; anda toner regulating means having a bending section at an end, for regulating a thickness of a toner layer on the developing means by the bending section elastically contacting a surface of said developing means at a contact point upstream, in a rotating direction of said developing means, from the contacting section of said developing means and said electrophotoconductive means.