A FOIL AS A COVERING FOR AN IMPRESSION CYLINDER IN ROTARY OFFSET PERFECTING PRESSES

The invention relates to a foil as a cover for an impression cylinder in rotary offset perfecting presses, which consists of a rigid support layer resistant to chemicals and wear and with good ink transfer behavior, said foil having a calotte-structured surface of statistically uniformly distributed...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	WIRZ, ARNO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	LINING MACHINES MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE PERFORMING OPERATIONS PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM PRINTING PRINTING MACHINES OR PRESSES PRINTING PLATES OR FOILS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	The invention relates to a foil as a cover for an impression cylinder in rotary offset perfecting presses, which consists of a rigid support layer resistant to chemicals and wear and with good ink transfer behavior, said foil having a calotte-structured surface of statistically uniformly distributed convex and concave structural elements and a chromium layer which forms the sheet-guiding outer cylindrical surface of the impression cylinder and has a microroughness-reducing effect, and a sheet is supported by the poles of the convex structural elements thereof. These convex structural elements have an oval shape, with the radius of curvature from pole to passage into the concave structural elements becoming gradually larger.