DEVELOPING DEVICE, PROCESS CARTRIDGE, DEVELOPING UNIT CARTRIDGE AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a developing device which can minimize damage caused by the leakage of toner even if the toner leaks out. SOLUTION: A safe guard film 120 formed of PET film is stuck to a part which is the lower end front edge part of the case 51 of the developing device and is also the front part of Teflon(R) felt 113 and a side seal. In the case that the case 51 does not have a sufficient sticking surface, a safe guard member made of a resin is formed and is suck to the side surface or the like of the case 51.