B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 45/04 (2006.01) B31B 23/74 (2006.01) B65H 45/14 (2006.01)
Patent
CA 2224533
A folding apparatus of a bag-making machine includes a plurality of folding mechanisms each having a pair of nip rollers which receive a sheet or bag from an associated carrier structure, to thereby sequentially form transverse folds in each sheet or bag. In order to abate lamination like adhesion of relatively thin, light gauge film materials to the belts and other surfaces of the folding apparatus, the belts and/or guide rollers of the apparatus are preferably provided with groovedsheet-contacting surfaces. The apparatus is additionally configured to abate wrinkling or buckling of a leading edge portion of each sheet or bag which can occur attendant to its reversal in direction of movement as it is directed between the nip rollers of each folding mechanism. High-speed operation is facilitated while avoiding improperly folded bags, or equipment jamming.
Cette invention concerne une plieuse de machine à confectionner des sacs qui comprend une série de mécanismes de pliage, chacun formé d'une paire de rouleaux formant pince qui reçoivent une feuille ou un sac en provenance d'un alimentateur associé et y forment en séquence des plis transversaux. Afin de limiter le collage des pellicules d'épaisseur relativement faible aux courroies et à d'autres surfaces de la plieuse, lesdites courroies et/ou les rouleaux-guides ont leur face supérieure rainurée. L'objet de l'invention est en outre conçu pour limiter le froissement ou le plissement du bord aval de chaque feuille ou sac à l'étape de l'inversion de leur sens de déplacement vers les rouleaux formant pince de chaque mécanisme de pliage. La configuration adoptée favorise une cadence élevée tout en limitant les faux-plis ou les blocages de l'appareil.
Fmc Corporation
Sim & Mcburney
LandOfFree
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