Blanket cylinder throw-off device

Details Blanket cylinder throw-off device Blanket cylinder throw-off device

1997-02-20

1998-03-03

Yan, Ren

Printing

Rolling contact machines

Rotary

101247, 101185, B41F 1324

Patent

active

057223238

ABSTRACT:
An improved throw off device for disengaging adjacent blanket cylinders (12) and (14) from each other and corresponding adjacent plate cylinders (16) and (18) is provided. The device includes pairs of bearing assemblies (28A), (28B), (30A) and (30B) that are mounted on the opposite ends of the journal (26) of each of the blanket cylinders (12) and (14). Each bearing assembly is defined by an inner race (36) and an outer race (38) having an eccentric bore in which the inner race is disposed. The device eliminates the need for a bearing sleeve. Each bearing assembly has a lever (74) arm that is mounted to the outer race (38). The lever arm (74) is defined by two wing-shaped portions (76) and (78). Each bearing assembly further includes a hydraulic cylinder (86). Each hydraulic cylinder (86) is coupled at one end to one of the two wing-shaped portions of the lever arm (74) and at the other end to one of the side frames of the printing press. A stopping member (84) is mounted to the other wing-shaped portion of the lever arm (74). Each bearing assembly also has an corresponding adjustable stopping screw (88) that is mounted to the side frame adjacent to the stopping member (84). A plumbing circuit (100) is also provided for uniformly supplying each of the hydraulic cylinders with equal volumes of hydraulic fluid so that they engage and disengage the blanket cylinders (12) and (14) in tandem.

REFERENCES:
patent: 2986086 (1961-05-01), Siebke
patent: 4129329 (1978-12-01), Longo
patent: 4362098 (1982-12-01), Stelling, Jr. et al.
patent: 4643090 (1987-02-01), McKrell et al.
patent: 5311817 (1994-05-01), Funada
patent: 5445076 (1995-08-01), Sugiyama et al.

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