Patent ID: 6016413
Filing Date: 2000-01-18
Classification: G03G,Y10T

Abstract:
An assembling method of a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, comprising:(a) providing a drum frame supporting an electrophotographic photosensitive drum and having a first engaging portion above said electrophotographic photosensitive drum adjacent one longitudinal end of said electrophotographic photosensitive drum, and a second engaging portion above said electrophotographic photosensitive drum adjacent the other longitudinal end of said electrophotographic photosensitive drum;(b) providing a developing device frame supporting a developing member for developing a latent image formed on said electrophotographic photosensitive drum, and having a first compression spring and a second compression spring above said developing member adjacent one and the other longitudinal ends of said developing member, and a first projected portion and a second projected portion projected in a direction crossing with a longitudinal direction of said developing member adjacent the one and the other longitudinal ends of said developing member;(c) an engaging step of engaging said first projected portion and said first engaging portion and engaging said second projected portion and said second engaging portion;(d) a penetration step of (i) penetrating a first penetrating member through a first opening, which is formed in said first projected portion, and a third opening and a fifth opening formed in said first engaging portion, said third opening and said fifth opening being opposed to each other with said first projected portion therebetween when said first projected portion and said first engaging portion are engaged with each other, said first penetrating member entering said third opening, then said first opening and then said fifth opening, and (ii) penetrating a second penetrating member through a second opening, which is formed in said second projected portion, and a fourth opening and a sixth opening formed in said second engaging portion, while said second projected portion and said second engaging portion are engaged with each other, so as to couple said drum frame and developing device frame, said fourth opening and said sixth opening being opposed to each other with said second projected portion therebetween when said second projected portion and said second engaging portion are engaged with each other, and said second penetrating member entering said fourth opening, then said second opening and then said sixth opening.