Method and a device for retaining a thin medium between two bodies

摘要

A medium is retained in the predetermined mutual spaced relation in a gap between two plane faces on respective bodies. The bodies are mutually displaceable in a direction substantially perpendicular to the gap and biassed in the direction of displacement. One of the bodies is connected with a compressed air source providing through a plurality of outlets in the plane face of the respective body an air cushion between the face and the medium.