Printing – Selective or progressive – Bed and platen machines
Patent
1987-01-12
1990-08-07
Burr, Edgar S.
Printing
Selective or progressive
Bed and platen machines
101111, 400146, B41J 120
Patent
active
049458280
ABSTRACT:
A pulley for connecting a driven device, that is sensitive to speed variations, to be driven by an a.c. motor that is susceptible to speed variations, caused by power line disturbances. The pulley has a peripheral drive surface for a belt drive and two side surfaces through which an opening is formed to receive a drive shaft that is turned by the a.c. motor. One of the sides of the pulley has a slot formed therein with surfaces on each side of the slot. A resilient material of a preselected Durometer value is positioned within the slot and contiguous with at least one of the surfaces in the slot, against which an element projecting from the drive shaft acts to turn the pulley. During a momentary slowdown in the motor speed, the projecting element moves away from the resilient material and permits the momentum of the driven device to maintain its speed while the motor recovers its speed.
REFERENCES:
patent: 3384216 (1968-05-01), Thayer
patent: 3819966 (1974-06-01), Noguchi
patent: 4161373 (1979-07-01), Chvatlinsky
patent: 4324498 (1982-04-01), Steinhardt
patent: 4803855 (1989-02-01), Kennedy
Gabriel Charles F.
Kisacky Randy J.
Mako John
Stone Lawrence A.
Burr Edgar S.
Clarkson Douglas M.
International Business Machines - Corporation
Keating Joseph R.
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