with flat supports over which gelatin-paper is stretched

Full Title

Apparatus for indirectly duplicating from hectographic originals by means of hectographic intermediaries or transfer surfaces, i.e. "dry duplicators" > with flat supports over which gelatin-paper is stretched

Child Classifications

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• B41L 9/06 and with carriages for feeding the sheets
• B41L 9/08 and with devices for rolling-in and securing hectographic gelatin-paper webs