Print unit having cylinders forming a counterweight and...

Details Print unit having cylinders forming a counterweight and... Print unit having cylinders forming a counterweight and...

2006-08-09

2009-08-25

Colilla, Daniel J (Department: 2854)

Printing

Rolling contact machines

Rotary

C101S216000, C101S247000

Reexamination Certificate

active

07578235

ABSTRACT:
The invention provides a unit for printing a web of paper including a frame and at least a first and a second printing group, each printing group including a blanket cylinder and a plate cylinder, the printing unit also including a throw off mechanism for supporting and moving the cylinders, into at least one throw-on configuration, in which the blanket cylinders are pressed against each other and against the plate cylinders, and a throw-off configuration, in which the blanket cylinders are spaced apart from each other and from the plate cylinders. The throw-off mechanism includes at least a first system for returning the mass of at least a first cylinder of the first printing group towards a first cylinder of the second printing group and vice-versa so that the first cylinders form mutual counterweights when the printing unit moves between the throw-on and throw-off configurations thereof.

REFERENCES:
patent: 3527165 (1970-09-01), Harless
patent: 5791246 (1998-08-01), Kelm
patent: 6216592 (2001-04-01), Knauer et al.
patent: 6227111 (2001-05-01), Dawley et al.
patent: 2004/0177778 (2004-09-01), Christel et al.
patent: 2006/0225590 (2006-10-01), Dawley et al.
patent: 91 09 833.5 (1991-09-01), None
patent: 91 09 833.5 (1991-10-01), None
patent: 2 787 059 (2000-06-01), None
patent: 2 792 871 (2000-11-01), None

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