Patent ID: 6336012
Filing Date: 2002-01-01
Classification: G03G

Abstract:
A developing apparatus comprising:a frame; a developer carrying member for carrying a developer to develop an electrostatic image formed on an image bearing member, said developer carrying member including a first cylindrical portion and a second cylindrical portion provided at an end of said first cylindrical portion and supported by a bearing portion; a magnet provided in said developer carrying member, said magnet being extended from inside of said developer carrying member to outside thereof; a first electroconductive portion supported on said magnet and extended from inside of said developer carrying member to outside thereof; a second electroconductive portion provided in said developer carrying member and electrically connected with an inner surface of said first cylindrical portion and in slidable contact with said first electroconductive portion inside said developer carrying member; a third electroconductive portion including a first electrical contact portion electrically connected with said first electroconductive portion outside of said developer carrying member and a second electrical contact portion disposed at a position different from said first electrical contact portion and electrically connected with an electrical contact of a main assembly of an image forming apparatus; when a developing bias is applied to said developer carrying member from the electrical contact of the main assembly of the image forming apparatus by way of said third electroconductive portion, said second electroconductive portion and said first electroconductive portion.