Process for exposing the inner surface of a cylinder comprises applying a mask film on the inner surface by feeding the film into the cylinder, introducing compressed air, and exposing the inner surface through the film

摘要

Process for exposing the inner surface of a hollow object, especially the inner surface of a cylinder (12) comprises applying a mask film (18) on the inner surface by feeding the film into the cylinder, introducing compressed air into the cylinder to hold the film against the inner surface, and exposing the inner surface through the film. An independent claim is also included for a device for exposing the inner surface of a hollow object, especially the inner surface of a cylinder, comprising a holder (20), a transparent element (26), a unit (32) for introducing compressed air, and a tube (24) received in the transparent element.