VORRICHTUNG ZUM AUTOMATISCHEN AUF- UND ABSPANNEN VON AUFZEICHNUNGSMATERIAL UND BETRIEBSWEISE DER VORRICHTUNG

摘要

The invention relates to a device for the automatic clamping of film material on the recording head of a reproduction device and for releasing film material exposed by a recording device from the recording head and its operation. The device illustrated in fig. 1 consists of a roll-film cassette which can be taken into the darkroom (1) of the reproduction device, transport and guide surfaces (30, 31) between the roll-film cassette (3) and the recording head (9), film transport means (22, 23) to convey the film web (25) in the roll-film cassette (3) to the recording head (9), a film cutting device (26) to separate the film sheets, a film length measuring device (32), a pressure device (61) with a lowerable pressure roller (62) for the film sheets, a positioner drive (54) to rotate the recording head (9) into an initial clamping, exposure and releasing position and a removal device (66) with a lowerable release finger (68) to peel the exposed film sheets from the recording head (9). The film sheets are held against the recording head (9) by a vacuum. The device makes it possible to clamp especially large-area film material from a roll-film cassette on the recording head without creasing and delay.