Apparatus and method for making a lithographic printing plate ac

Photography – Fluid-treating apparatus – Having photographic medium feed

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355 27, 396612, G03D 308

Patent

active

057404895

ABSTRACT:
An apparatus and a method for making a lithographic printing plate by silver salt diffusion transfer processing, comprising means for informationwise exposing an imaging element (5) comprising on a support in the order given a silver halide emulsion layer and a layer comprising physical development nuclei: means for processing a thus obtained informationwise exposed imaging element using a processor comprising a developing unit (120), the developing unit comprising (i) a tank holding an alkaline processing liquid, (ii) a plurality of guide rollers (50) and guide plates (121 to 126) for transporting and guiding the informationwise exposed imaging element in a transport direction X through the alkaline processing liquid characterised in that at least one of the guide plates (121 to 126) exhibits a plurality of apertures (150) to allow the alkaline processing fluid to pass evenly near the surface of the imaging element.

REFERENCES:
patent: 4324354 (1982-04-01), Hope et al.
patent: 5043756 (1991-08-01), Takabayashi et al.
patent: 5059508 (1991-10-01), Vaes et al.
patent: 5116721 (1992-05-01), Yamamoto
patent: 5455651 (1995-10-01), Verhoest et al.
patent: 5583600 (1996-12-01), Kurosawa et al.

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