Plate support for microfilm reader - has balls which are fitted between plate and support surface

摘要

The support for moving a plate body (1) to any desired point on a flat surface (17a) and at the same time to ensure that the body (1) maintains its original alignment relative to the surface, consists of balls which are fitted between the body (1) and the surface (17a). Each ball is made from an elastically deformable material and when subjected to a force (F) the distance between the body (1) and the surface (17a) becomes less than the free diameter of the ball. USE/ADVANTAGE - Guidance system for a micro film viewing system. The system ensures that parallel movement of the film is maintained.