Printing – Multicolor – Rotary machines
Patent
1984-11-15
1986-01-14
Pieprz, William
Printing
Multicolor
Rotary machines
101219, 101417, 101181, 226172, B41F 1302
Patent
active
045639507
ABSTRACT:
To prevent smearing, ghost formation, or unsharp printing of offset printing machines, due to flutter, random oscillations or adhesion of a substrate to a blanket cylinder caused by adhesive characteristics of printing ink, an endless flexible guide element (9, 40, 48, 54, 68, 83, 84) is passed about the blanket cylinder and through the printing line with an impression cylinder, the guide element being, for example, a nylon thread, rope, or cable, or a thin flexible narrow web, guided, axially, with respect to the blanket cylinder by deflection rollers to locate the guide element at a position on the printed substrate which does not carry any printed copy. Preferably, the axial position of the guide rollers is adjustable, and at least one of the guide rollers is spring-loaded to adjust tension, which can be released for threading, or adjustment of the machine.
REFERENCES:
patent: 2821913 (1958-02-01), Johnson
patent: 3468247 (1969-09-01), Vasilantone
patent: 3469755 (1969-09-01), Rogers
patent: 3701464 (1972-10-01), Crum
patent: 3819445 (1974-06-01), Devries
patent: 3835776 (1974-09-01), Weidman
patent: 3930446 (1976-01-01), Crissy
patent: 4038921 (1977-08-01), Harrison et al.
patent: 4145039 (1979-03-01), Carlsson
patent: 4431124 (1984-02-01), Campbell et al.
patent: 4474342 (1984-10-01), Nater
M.A.N.--Roland Druckmaschinen Aktiengesellschaft
Pieprz William
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