Printing unit with skew and throw-off mechanisms

Details Printing unit with skew and throw-off mechanisms Printing unit with skew and throw-off mechanisms

1993-03-04

1994-04-12

Eickholt, Eugene H.

Printing

Rolling contact machines

Rotary

101139, 101143, 101247, B41F 500

Patent

active

053016092

ABSTRACT:
A printing unit (10) includes a frame (22), first and second brackets (50, 54), and upper and lower plate cylinders (14, 18). The first bracket (50) is supported on the frame (22) for movement relative to the frame (22). The upper plate cylinder (14) has an end supported to move with the first bracket (50). The second bracket (54) also is supported on the frame (22) for movement relative to the frame (22), and the lower plate cylinder (18) has an end supported to move with the second bracket (54). The printing unit (10) also includes a skewing mechanism and a throw-off mechanism. The skewing mechanism moves the brackets (50, 54) transversely relative to the frame (22) independently of each other. The throw-off mechanism moves the brackets (50, 54) pivotally relative to the frame (22). The throw-off mechanism includes a pressure cylinder (140) and a piston rod (142) connected between the two brackets (50, 54) The pressure cylinder and the piston rod (142) are pivotally connected to the brackets (50, 54) and move pivotally relative to the brackets (50, 54) when the brackets (50, 54) are moved transversely by the skewing mechanism. The throw-off mechanism thus permits the brackets (50, 54) to be skewed independently of each other while remaining connected with each other for throw-off.

REFERENCES:
patent: 906484 (1908-12-01), Ballard
patent: 3633503 (1972-01-01), Tafel
patent: 4214527 (1980-07-01), Kamota
patent: 4365552 (1982-12-01), Kubert
patent: 4414895 (1983-11-01), Schwartz et al.
patent: 4453463 (1984-06-01), Dahlgren et al.
patent: 4458590 (1984-07-01), Egnaczak
patent: 4458591 (1984-07-01), Guaraldi
patent: 4643090 (1987-02-01), McKrell et al.
patent: 4831926 (1989-05-01), Bowman et al.

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