| 摘要 |
PROBLEM TO BE SOLVED: To prevent the internal toner from being leaked without specially improving the molding precision of a molding by fixing a detecting window to a toner vessel through a packing member interposed between the flange of the detecting window and the edge of an opening part. SOLUTION: To mount a detecting window 1 on a toner vessel 8, a packing 7 is fitted to the groove 6 of the detecting window 1, a translucent part 1b is inserted into the toner vessel 8 through the opening part 8d of the toner vessel 8, and the packing 7 is brought into contact with the edge 8a of the opening part 8d of the toner vessel 8 so that the female screw 8b of the toner vessel 8 is conformed to the hole 5 of the detecting window 1. A flange 1a is separated from the edge 8a of the opening part 8d of the toner vessel 8 in this state. When a small screw 9 is screwed into the female screw 8b of the toner vessel 8 through the hole 5 of the flange 1a of the detecting window 1 in this state, the flange 1a is advanced toward the edge 8a of the opening part 8d of the toner vessel 8 and brought into contact with it. At this time, the packing 7 is crushed to cause airtightness. |
