Printing – Planographic – Rotary machines
Patent
1982-03-22
1983-08-09
Burr, Edgar S.
Printing
Planographic
Rotary machines
101DIG28, 101148, 101352, 101425, B41F 726, B41F 524, B41F 3500
Patent
active
043972357
ABSTRACT:
To permit, in addition to selectively raised letter printing or direct lithographic printing on a single plate cylinder (2), additionally flexo printing, the damping system (4) utilized for direct lithographic printing is filled with flexo printing ink rather than with damping liquid, and the direction of rotation of the plate cylinder, and an associated impression cylinder, together with direction of passage of a printed web or sheet (28) is reversed so that flexo printing ink is applied by the damper, positioned in advance of the printing or impression line (29) to a flexo printing plate on the plate cylinder (2) whereas, for direct lithographic printing, damping liquid is first applied to the plate cylinder for subsequent application of ink by an inker (8) in engagement with the plate cylinder which is removable from engagement when used in flexo printing. The roller brush (20) is positioned between the damping system (4) and the inker (3), engaged with the flexo printing plate for flexo printing, but out of contact with the plate cylinder for direct lithographic printing. For raised letter printing, the damper application roller (12) is disconnected from contact with the plate cylinder, and the roller brush (20) operating in the differential speed with respect to the plate cylinder, is used to clean the raised portions of the printing plate thereon. The system permits extension of existing selective DiLitho or raised letter printing also to flexo printing.
REFERENCES:
patent: 3043214 (1962-07-01), Christhoff
patent: 3516354 (1970-06-01), Heimlicher
patent: 3561357 (1971-02-01), Schinke
patent: 3890898 (1975-06-01), Fischer
"Litho Switch", The British Printer, Aug. 1975, p. 31, Anon.
Euroman--M.A.N. -Roland Druckmaschinen--Letterpress Convertible Printing Press.
Burr Edgar S.
Man-Roland Druckmaschinen Aktiengesellschaft
Wiecking David A.
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