A compromise between cylinder and flat frame printing, the rotary frame technique enables continuous printing. The machine itself is similar to those used for automated flat frames, but the belt moves continuously and the frames are replaced by rotary stencils: very thin and light hollow cylinders with calibrated holes, some of which are plugged during engraving. The dye is pushed out from these cylinders.
Invented in 1964, this technique came about with the development of seamless nickel cylinders, either perforated or directly engraved.
Local photo-engraver Duchenaud was the first in France to produce them. Subsequently, he was often a pioneer in perfecting the advanced equipment offered by manufacturers.
In the eighties, another technique of engraving rotary frames emerged, with electroplating.
Impression aux cadres rotatifs par musee_de_bourgoin_jallieu