초록 ▼

A developing device for electrophotography includes a developer supporter faced to an image bearing member with a constant space maintained therebetween at a developing station, a developer supply and an elastic developer limiting member maintained in predetermined pressure contact with the develope

A developing device for electrophotography includes a developer supporter faced to an image bearing member with a constant space maintained therebetween at a developing station, a developer supply and an elastic developer limiting member maintained in predetermined pressure contact with the developer supporter between the developer supply and the developing station to limit the thickness of developer supported on the supporter to a value not causing contact of the developer with the non-imaged area on the image bearing member.

대표청구항 ▼

A developing apparatus for developing with a powder developer, comprising: a movable developer supporting member provided in facing relationship with a image carrying means in a developing station for developing a latent image carried on the image carrying means, said supporting member being separ

A developing apparatus for developing with a powder developer, comprising: a movable developer supporting member provided in facing relationship with a image carrying means in a developing station for developing a latent image carried on the image carrying means, said supporting member being separated from the image carrying means by a predetermined distance; means for supplying powder developer to said supporting member; and an elastic developer limiting member having a free end upstream of the developing station, with respect to the direction of movement of the developer, which is maintained in predetermined pressure contact with said developer supporting member at a position between said developer supply means and the developing station to regulate a thickness of a layer of the developer particles supplied by said supplying means, wherein said limiting member includes an elastic plate having a surface including a contact portion which is in surface press-contact with said developer supporting member counter-directionally with respect to a movement direction of the developer supporting member, and an extension surface portion which extends toward the downstream direction from the contact portion and which is faced to said developer supporting member, wherein said plate and said developer supporting member cooperate to form a nip, in the contact portion, through which the developer particles are passed so that the thickness of the developer layer is regulated, and wherein the elastic plate has an end portion in the developer particles.