B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
270/86
B65H 5/02 (2006.01) B65H 29/68 (2006.01)
Patent
CA 1128561
A B S T R A C T The invention relates to a sheet delivery apparatus on printing presses which is fitted with pneumatically operating braking mechanisms and the function of which is to retard and tighten the emerging sheet which is to be deposited. The pneumatic braking mechanisms may be of single-piece or two- piece construction and are fitted with brake rollers pressurized with suction air which are adjusted to run on print-free areas of the image in order to prevent set-off of the newly printed sheet undersides. In order to allow for adaption of the braking force of the braking rollers to various types of paper and bearing in mind the varying width of the print-free areas of the sheet depending on the printed product, the braking rollers are arranged on a support shaft below the chain delivery in front of the delivery pile and can easily be interchanged with others having wider or narrower sheet support areas. Depending on whether the braking mechanisms are of single-piece construction as braking rollers with integral suction chambers and integrated vacuum feed or of two-piece construction as braking rollers with separate slip-on suction elements, so the support shaft is of single-piece continuous construction or of multi-piece and separable construction.
319443
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
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