| 摘要 |
PURPOSE:To easily confirm the position of the belt by forming the belt of a base layer of a transparent material, a resistance layer of an opaque material, and a recording layer of the same material with the base layer, and providing a transparent position sensor composed of only the base layer and recording layer. CONSTITUTION:The dielectric belt 4 is composed of the base layer 1 of the transparent material, resistance layer 2 of the opaque material, and recording layer 3 of the same material with the base layer 1. When the base layer 1 is coated with the resistance layer 2 by a screen printing method, etc., a part 5 which is not coated is provided at intervals of the peripheral length of the belt and the recording layer 3 is laminated thereupon; and the belt is cut at parts a-a, b-b, c-c, etc., where the resistance layer 2 is not present, and those parts are heat-sealed. Thus, a transmission type photosensor is used to easily confirm the position of the belt. |
