Ductor drive

Details Ductor drive Ductor drive

1979-11-28

1981-06-02

Fisher, J. Reed

Printing

Planographic

Dampeners

101350, 101DIG6, B41F 740, B41F 3114, B41L 2516, B41L 2716

Patent

active

042704529

ABSTRACT:
An apparatus for cyclically decelerating and accelerating a ductor roller which has a journal which is mounted on a swing arm for rotation on the arm and is moved with the arm to selectively and alternatively engage the ductor roller with a first roller, such as a fountain roller and a second roller, such as a first roller of a printing press, is employed in inking and damping units of such presses. The apparatus includes a bearing head of the spring arm which provides a rotatable mounting for the journal of the ductor roller and the arrangement includes a planetary gear system connected to the journal and to a free wheel element with a controllable brake acting between the planetary gear system and the bearing head of the swing arm in an arrangement which permits the free wheel element to rotate after the braking system has been engaged to cause the winding or tensioning of a spring, such as a spiral spring, which is disposed between the free wheel element and the journal of the ductor roller.

REFERENCES:
patent: 1452043 (1923-04-01), Harrold
patent: 1927759 (1933-09-01), Spence
patent: 1980639 (1934-11-01), Schlesinger
patent: 2120978 (1938-06-01), Huck
patent: 2262470 (1941-11-01), Schlesinger

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