B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
101/36, 101/84
B41F 13/48 (2006.01) B41F 5/24 (2006.01) B41F 17/00 (2006.01) B41L 19/06 (2006.01)
Patent
CA 1322888
ABSTRACT OF THE PRESENT INVENTION The present invention therefore provides apparatus for printing quasi random number tables comprising a printing press having one or more printing stations incorporating a plurality of endless belts, each entrained around an impression roller and an idle roller, each belt being a different length which is a multiple of a basic pitch value, and each belt having affixed to the outer surface thereof and arranged in a row along the length of the belt, a plurality of printing plates arranged to print an impression onto a web or other medium passing through the press in register with a similar impression printed by each other belt. In one form of the invention each plate prints a number such that each belt prints different numbers in register, forming larger numbers or tables whose digits change from impression to impression in a quasi random manner. In one form of the inventioneach printing station incorporates one said belt. In an alternative form of theinvention at least one printing station incorporates a plurality of belts entrained about a common impression roller. Each belt may be inked from a common source or may be independently inked so that a number of different colors may be printed at the one station. Preferably, each belt is provided with a tension roller or shoe arranged to tension the belt about the impression and idle rollers. This is particularly important when a plurality of belts of different lengths are entrained about common impression and idle rollers at the same station.
574458
Riches Mckenzie & Herbert Llp
Sillars Ian M.
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