Apparatus for forming sheets of material having a uniform...

A - Human Necessities – 21 – C

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A21C 3/02 (2006.01) A21C 3/10 (2006.01) A21C 11/06 (2006.01)

Patent

CA 2197179

An apparatus for forming a sheet of material, e.g., dough or masa, from a supply of the material includes a pair of rotatable rollers that define therebetween a gap into which is input a dough mass and out of which is produced a dough sheet. Fluctuations in the size of the roller gap are sensed by detecting changes in the position of one of the rollers, which changes are input to a servo system that automatically corrects the position of the one roller so as to maintain the proper gap size. The one roller is movably mounted in scissor-like fashion and is easily driven by a servo motor. A cutter is provided which presses against one of the rollers to cut individual dough portions from the sheet. The ends of the cutter are subjected to a bending moment which induces a camber in the cutter. This prevents the central portion of the cutter from bowing away from the roller and ensures uniform pressure between the cutter and roller, even for applications with an extremely long cutter and rollers.

Un appareil permet de former une feuille d'une substance, par exemple de la pâte ou de la pâte à base de maïs, à partir de cette substance. Il comporte une paire de rouleaux rotatifs qui définissent entre eux un espace dans lequel on fait pénétrer la masse pâteuse et à la sortie duquel on obtient une feuille de pâte. Des fluctuations de largeur de cet espace sont détectées par la modification de la position de l'un des rouleaux, modifications introduites dans un système d'asservissement qui corrige automatiquement la position de ce rouleau pour rétablir la largeur d'espace appropiée. Ce rouleau est monté à la façon, mobile, d'une lame de paire de ciseaux, et entraîné sans difficulté par un moteur asservi. Un couteau presse contre l'un des rouleaux pour couper dans la feuille des parts de pâte individuelles. Les extrémités de ce couteau sont soumises à un moment de courbure qui induit une incurvation du couteau évitant que sa partie centrale ne s'écarte du rouleau et assurant une pression uniforme entre couteau et rouleau, même dans les cas où ces derniers présentent une grande longueur.

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