Printing – Intaglio – Multicolor
Reexamination Certificate
2000-01-20
2001-04-03
Colilla, Daniel J. (Department: 2854)
Printing
Intaglio
Multicolor
C101S176000, C101S179000, C101S180000, C101S181000, C101S221000
Reexamination Certificate
active
06209454
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a rotogravure printing process and to a rotary rotogravure printing press. Several printing are arranged one above the other in a tower structure for multicolor printing of both sides of a web. The printing units are arranged to print alternating sides of the material being printed.
DESCRIPTION OF THE PRIOR ART
EP 0 598 240 B1 describes a rotary rotogravure printing press with eight rotogravure printing units in a tower construction for multicolor first or obverse side and or reverse side second printing.
Swiss Patent 202 875 discloses a rotary rotogravure printing press, wherein a web is alternatingly printed on the front and back. A limitation of this prior art device is that the web paths between the individual printing units are of different length.
U.S. Pat. No. 2,104,026, discloses a rotary letter press for newspaper printing, wherein a web is alternatingly printed in multiple colors in a first and a second printing.
SUMMARY OF THE INVENTION
The present invention is based on the object of providing a rotary rotogravure printing press.
In accordance with the invention, this object is attained by the provision of a rotary rotogravure printing press that uses several printing units arranged one above the other in a tower structure. The printing press accomplishes multicolor printing of the first and second, or obverse and reverse surfaces of a material to be printing. The material travels between alternating first and second side printing units which are each separated by dryers.
The advantages which can be obtained by means of the present invention lie, in particular, in that with a preset structural height it is possible to use selective lengths of the dryers. The web travel path between two successive printing operations performed on one side of the web is twice as long compared to prior art presses, wherein first one side is completely printed and then the other side is completely printed. In this way, the quality of the successive colors is increased, or the length of the dryers arranged between two printing units is reduced.
Moreover, a construction which is compact and advantageous for the change of the form cylinder is made possible by the present invention.
REFERENCES:
patent: 1640977 (1927-08-01), Brueshaber
patent: 1738324 (1929-12-01), Scott
patent: 2104026 (1938-01-01), Dowell
patent: 2319853 (1943-05-01), Durham
patent: 5483887 (1996-01-01), Grosshauser
patent: 5564336 (1996-10-01), Straubinger et al.
patent: 202875 (1939-02-01), None
patent: 0598240 B1 (1994-05-01), None
patent: 813971 (1997-12-01), None
patent: 630941 (1927-12-01), None
patent: 56-137968 (1981-10-01), None
Christmann Dieter
Drumm Hans-Dieter
Herb Rudolf
Straubinger Werner Georg Roman
Colilla Daniel J.
Jones, Tullar & Copper PC
Koenig & Bauer Aktiengesellschaft
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