Bonding two corrugated mediums at flute tips ensuring...

B - Operations – Transporting – 31 – F

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Details

B31F 1/28 (2006.01) B31F 5/00 (2006.01)

Patent

CA 2224725

This invention relates to improved methods and apparatus for forming paper board structures in which two corrugated mediums are bonded together at their flute tips. The apparatus comprises: two register rolls (4, 6) for ensuring that the mediums are brought into precise flute tip to flute tip alignment for bonding; dependent electric motors to drive the register rolls in which one roll (6) is driven by a reference motor (15) and the second register roll (4) is driven by a follower motor (16); location sensing devices (18, 19) associated with each register roll (4, 6) to measure a value related to the location of a position on the periphery of each register roll; control means (17) which compares the measured values for each register roll and if necessary adjusts the voltage or current of the follower motor (16) to maintain alignment of the flute tips of the two mediums.

L'invention concerne des procédés et un dispositif améliorés permettant de réaliser des structures en carton, où deux cartons ondulés sont assemblés au niveau des extrémités de leurs cannelures. Ce dispositif comprend: deux rouleaux de repérage (4, 6) pour que les extrémités des cannelures des cartons soient amenées en alignement précis en vue de leur assemblage, des moteurs électriques dépendants qui entraînent les rouleaux de repérage, dont un rouleau (6) est entraîné par un moteur de référence (15) et le second rouleau de repérage (4) est entraîné, quant à lui, par un moteur auxiliaire (16), des détecteurs d'emplacement (18, 19) associés à chaque rouleau de repérage (4, 6), pour mesurer la valeur concernant l'emplacement d'une position sur la périphérie de chaque rouleau de repérage, un élément de commande (17) qui compare les valeurs mesurées pour chacun des rouleaux de repérage et ajuste le cas échéant la tension ou le courant du moteur auxiliaire (16) afin de maintenir l'alignement des extrémités des cannelures des deux cartons.

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