| 摘要 |
PURPOSE:To improve the workability of opaque by discriminating the front and back of a film based on the reflecting light amount of a light source provided in a part of device, into which an object plastic film is inserted, and displaying the result of the discrimination. CONSTITUTION:When an inspection object 1 is inserted into the inserting part 100 of an automatic opaque device 10, a light receiving element 102 receives the reflecting light from the light source 101, and the front and back of the film is discriminated based on a difference between the amount of reflecting light from the film and that from an image forming surface. Thus, the front and back of the film can be easily discriminated, therefore, workability is improved. |
