| 摘要 |
A printing character matrix and a process for assemblying characterized by a hollow cylinder rotatably disposed within a housing and having a plurality of circumferential grooves on its circumferential surface. Each of the circumferential grooves has sides lying in parallel planes which are parallel to the base of the cylinder and the cylinder has strips secured on its cylindrical surface and overlapping the sides of the two adjacent grooves to form means for positioning a character carrying member such as a photographic film containing the characters. To ensure axial position of each of the characters, each groove is provided with means biasing the member against one of the sides thereof and the device utilizing centrifugal force to hold the member on the positioning means. Preferably, the housing is provided with a filter so that air drawn through the cylinder as it is being rotated is free from undesirable particles. |
