Method of and apparatus for winding square folded sheet-like pro

Details Method of and apparatus for winding square folded sheet-like pro Method of and apparatus for winding square folded sheet-like pro

1991-05-23

1992-05-26

Schacher, Richard A.

Sheet feeding or delivering

Delivering

To receiver for pack of sheets

271216, 242 59, B65H 3128

Patent

active

051160439

ABSTRACT:
A stream of square folded sheets, wherein one marginal portion is thicker than the marginal portion which is parallel thereto, is fed into the nip of a rotary core and one or more flexible bands which are being convoluted onto the core whereby the sheets form a roll having convolutions which alternate with the convolutions of the band or bands. The thicker marginal portions of the sheets are fed in a direction at right angles to the axis of rotation of the core so that, in the absence of any undertaking to the contrary, the diameter of the respective end face of the roll would exceed the diameter of the other end face which is formed by the thinner marginal portions of the sheets. The development of such frustoconical roll is prevented by moving the single band or one of several bands close to that end face of the roll which is formed by the thicker marginal portions of the sheets and by maintaining the thus positioned band under requisite tension in order to compress the thicker marginal portions. The difference between the thicker and thinner marginal portions of the sheets can be monitored and the position(s) of one or more bands can be adjusted in automatic response to detection of the difference.

REFERENCES:
patent: 4523751 (1985-06-01), Merkli
patent: 4528794 (1985-07-01), Thierstein
patent: 4538397 (1985-09-01), Boss
patent: 4589603 (1986-05-01), Muller
patent: 4752176 (1988-06-01), Linder
patent: 4768768 (1988-09-01), Reist

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