複製技術

 

	Gravure devices グラビア		The gravure devices developed by Hell since 1951, which were also named Klischograph, engrave pictures and text into a printing form for letterpress printing or for gravure printing. Still today, rotogravure printing cylinders for high volume printing of magazines, catalogues, and packaging material are produced with Helioklischograph machines.
	Scanner スキャナー		The first drum scanners were built by Hell since 1966. These scanners were not linked to a computer, since pictures could not yet be stored digitally. Available memory devices had not enough memory capacity, and they were too expensive and too slow. Only beginning in 1978, the first drum scanners could digitize pictures and store them in a computer.
	Scanner: special application		Hell developed special scanners for textile printing, which scan a design pattern drawn by a textile designer in order to generate the color separations required for textile printing. Also for weaving fabrics and carpets systems were developed, which generated from the scanned pattern the control data for a loom.
	Typesetting devices		The typesetting devices, also named Digiset, could compose text electronically with very high speed, and record it on film material. The text is generated character by character on a cathode ray tube and projected on the film.