Abstract: A plate making device for a plate roll that is to be made into a printing plate in which a pretreatment assembly, a photosensitive film coating assembly, and a protective film coating assembly are respectively installed on three separate tables that can be raised and lowered relative to the plate roll. The three separate tables are provided on a common table that is slidable along the axis of the plate roll. The three separate tables and the common table are moved so that a pretreatment assembly, a photosensitive film coating assembly and a protective film coating assembly are successively come into contact with the plate roll, and a pretreatment, a photosensitive film coating and a protective film coating are successively performed on the plate roll by the pretreatment assembly, the photosensitive film coating assembly and the protective film coating assembly. Thus, the entire plate making processes is performed by a single device, occupying lesser spaces.

Abstract: The invention is concerned with an apparatus for automatically attaching and detaching cassette-type rolls, which is suited for plating peripheral surfaces of the roll having shaft, and particularly for plating peripheral surfaces of a photogravure roll, with copper or chromium. The conventional apparatus which horizontally chucks both ends of a photogravure roll and which also spins the roll, could be adapted to the cassette-type hollow rolls, but could not be adapted to the cassette-type rolls having shaft. According to the apparatus for attaching and detaching cassette-type rolls of the present invention, the current-carrying supporters are exchanged depending upon the type of the roll to be treated, and the leak-proof caps are made up of moving caps that slide on the outer side of the spindles and exchange caps that are located between end surfaces of the roll and the moving caps.

Abstract: Equipment designed to automatically process a photoengraving cylinder through a variety of processes including plating on a metal roll, surface polishing, corrosion, development, printing and the like. In order to make more efficient such processes, this invention is directed to an equipment improvement which can automatically determine the condition of a cylinder during any process steps common to any of such processes, and further move a roller to be processed (hereinafter called a photoengraving cylinder) successively during the whole sequence of steps of work.