| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner leakage preventing means on the sides of the blade member, a blade mounting parts, the lower part of the developing roller, etc., in an opening from which the developing roller of a developing device is exposed. SOLUTION: In the opening 30 of the developing device which is disposed facing a photoreceptor drum 12, the blade member 35 as a layer thickness regulation member is disposed relative to a developing roller 25. Sealing members 37 are provided on both sides of the back of the blade member 3 in such a manner that the sealing members 37 are in light contact with seals 32 of the opening. Flexible films 36 are provided on both sides of the surface of the blade member and bent together with the blade member 35, so that sealing performance on the sides is exhibited. Wide films 39 are disposed on the surface of the upper portion of the blade member to prevent leakage of toner from the upper portion. COPYRIGHT: (C)2004,JPO |
