DEVICE FOR CENTERING THE PRINTING OF STRIP MATERIAL, ESPECIALLY IN APPARATUSES FOR THE FEEDING OF SUCH STRIP IN THE FORM OF V-SHAPED LABELS CAPABLE OF BEING ASSOCIATED WITH A CONTINUOUS THREAD FOR USE IN MACHINES FOR THE AUTOMATIC PRODUCTION OF SMALL FILTER

摘要

A B S T R A C T- A device for centering the printing of strip material, especiallyin apparatuses for feeding of such strip in the form of V-shapedlabels capable of being associated with a continuous thread foruse in machines for the automatic production of small filterbags for infusion products, in which said strip having printedmotifs possesses, between said printed motifs, a recurring motifat a spacing equal to the length of the labels which are to beproduced, and the feed means for such strip of said feed apparatusare constituted of two counter-rotating rollers having verticalaxes, one of which is a following roller of resilient material andthe other a driving roller of hard material having a driving surfaceof circular sector from for contact with the first roller. Saiddriving roller of circular sector form is rotatably mounted ona two-armed lever oscillating about a vertical axis, which lever,under an elastic action, encounters a screw-mounted elementgoverned by electromagnetic actuating means subject to the controlof means for reading and/or detecting the position of the recur-ring motifs between the printed motifs of the strip.