| 摘要 |
PROBLEM TO BE SOLVED: To cover a gap between a cap or a protector and a cylinder end with cheap material and an easy method, while not interrupting the flow of the production. SOLUTION: At the either end 11 of a cartridge 10, a cap 15 or a protector is attached. A cylindrical member 20 consists of an elastic material is to cover a border part A between the cylinder end 11 and the cap 15 or the protector. One or more ringed projections, each, at the inner circle of the cylindrical member 20 contact and push the surface of the cylinder end 11 and the surface of the cap 15. |
