Patent ID: 6934496
Filing Date: 2005-08-23
Classification: G03G

Abstract:
1. A developing device, comprising a developer conveying member in which a plurality of electrodes arranged on a substrate at a predetermined interval are coated with a surface protection layer, said developer conveying member being provided in a developing area that faces an image carrying body whose surface carries an electrostatic latent image, wherein developer is conveyed on said developer conveying member using a traveling-wave electric field that is formed by applying a polyphase voltage to said respective electrodes, the developing device further comprising: a supplying member for supplying the developer onto said developer conveying member, wherein (i) an effective electrode width Le of said respective electrodes in their width direction orthogonal to their arranging direction and (ii) a width Lt of a developer existing area on said supplying member, the width Lt being orthogonal to a direction of supplying the developer, are set so as to satisfy a relation of Lt<Le.