Apparatus for adjusting the diameter of folding drum in a rotary

Details Apparatus for adjusting the diameter of folding drum in a rotary Apparatus for adjusting the diameter of folding drum in a rotary

1988-06-22

1990-06-26

Garrett, Robert E.

Sheet-material associating

Associating and folding

Sheet associating

270 47, 493476, B42C 100

Patent

active

049365614

ABSTRACT:
An apparatus for adjusting a diameter of a folding drum in a rotary press includes essentially, bands, slide bases, screw rods, sun gears, a differential device and mechanism for operating the differential device. The bases, formed with internal threads, support the bands. The screw rods, fitted in the internal threads, have pinion gears. The sun gears are concentric with the folding drum, mesh with the pinion gears and are rotatable with respect to the folding drum. The operating mechanism changes phases of the sun gears with respect to the folding drum. Then, the screw rods rotate, and the bands expand and contract, thus adjusting the diameter of the folding drum.

REFERENCES:
patent: 2555267 (1951-05-01), Crafts
patent: 3477709 (1969-11-01), Neal et al.
patent: 4805502 (1989-02-01), Ishigure

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