Guide system, including drive, for a web from paper or...

B - Operations – Transporting – 65 – H

Patent

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271/55

B65H 23/00 (2006.01) B65H 20/02 (2006.01) D21F 7/02 (2006.01)

Patent

CA 2004800

ABSTRACT OF THE DISCLOSURE In a drive for running a paper or cardboard web, a fix point with a fixed speed of rotation is established by passing the web at a large loop angle across at least one hollow roll that is provided with cylinder surface bores which generate a vacuum. The web is thereby very firmly coupled with the roll along its loop angle, thus enabling an accurate adjustment of the speed of rotation. This is further improved in that either two hollow rolls or one hollow roll and an adjacent reversing roll with an appropriately large diameter are coupled with each other through a transmission. An appropriately large loop angle, by the web W, needs to be provided across the rolls which are coupled by means of the transmission. The drive is primarily contemplated in coating systems for paper or cardboard webs.

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