Plastic extrusion-transport roller for photomechanical apparatus

Claim 1

In a transport roller extruded from plastics for use in photomechanical apparatus, such as X-ray film cassette-loading and unloading devices, film development apparatus, film sheet processing apparatus for screen image receivers, X-ray receivers or the like, the transport roller including a cylindrical sleeve with a cylindrical outer surface, the improvement comprising a cross-section of said roller being formed as a circular ring having said cylindrical outer surface and being provided with a plurality of inwardly radially extending ribs having internal curved end surfaces of the same curvature, said end surfaces altogether forming a circular internal surface of the roller for engaging a shaft of the roller, said circular internal surface forming a cylindrical recess extended over the length of the roller, said roller having end faces, said shaft having end portions extending outwardly from said end faces; and end caps applied to said end faces to close said recess, said end caps being connected to said end portions, respectively, each cap having at a side thereof facing a respective end face of the roller, projections, said projections corresponding in shape to spaces between said ribs and in assembly extending between said ribs and being locked therewith.