Harmonic phasing device for printing press

Details Harmonic phasing device for printing press Harmonic phasing device for printing press

B - Operations, Transporting

41

F

101/127

B41F 5/06 (2006.01) B65H 23/188 (2006.01)

Patent

CA 1153245

HARMONIC PHASING DEVICE FOR PRINTING PRESS Abstract of the Disclosure A dual harmonic gear phasing device forming a part of a web-fed printing tower or other web-handling station is disclosed which allows static or dynamic, 360° infinite phase alterations of web-contacting rollers for coarse and fine tuning of the registration of a multiple- station printing press. The phasing device com- prises an enclosed, oil filled structure having a pair of tandem coupled harmonic drive gears re- spectively connected through gearing or the like to the press drive and to a desired roller for phase changing purposes. Each phasing device also includes a selectively operable stepper motor coupled to one of the harmonic gears for effecting phase alterations. The harmonic gears serve as a 1:1 gear ratio transmission during normal running operations. The phasing device can be used on hard impression or perfecting printing towers, and on other types of web-handling equipment where proper registration is important, such as num- bering and punching units. (Docket No. 16847)

379796

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