| 摘要 |
PURPOSE:To improve light shieldability and to prevent loose winding by forming at least one surface of the part where light shielding paper and the flange inner side of a spool come into contact with each other as a lubricating surface. CONSTITUTION:At least either one surface of the part where the light shielding paper 3 and the flange inner side of the spool 1 come into contact with each other is formed as the lubricating surface. Namely, a lubricating agent is incorporated into the ink or varnish or resin to be applied on the rear or front surface of the paper 3 or the lubricating agent is applied on the rear or front surface of the paper 3 or the lubricating agent is incorporated into the spool 1 prior to injection molding thereof. The leakage of light from between the paper 3 and the spool flange is obviated and the generation of troubles, such as loose winding and bulky winding, is obviated. |
