ES436527A1 - Machine intended to indicate and mark defects of the fabric in the parts. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Machine designed to mark and mark the woven defects in the pieces characterized by the fact that it is substantially constituted by: - a group of loading of the pieces, rolled or folded, arranged in a variable number on a suitable container cart, which, thanks to a pneumatic system of differential action, against the piece and keeps it constantly aligned; above said cart there are provided as many arms of hooking and initial tension in the clamp as there are the positions of accommodation thereof; a suitable probe, mounted on each of said arms, indicates to the control body of the machine the presence or absence of parts in the different housings; - an automatic regulator of the coupling clamp, constituted substantially by a motor-reducer group able to move horizontally a carrier plate of a certain profile guide that has the task of regulating the operative width of the clamp according to the dimensions of the piece; after given the order to start the cycle of said regulator, which maps to the heather hooks of the fabric existing on the cart, said regulator stops on the first of the aforementioned arms whose tracer gives the indication of presence of cloth; - a clamp, consisting of a bar of length equal to the width of the machine, on which are mounted two lateral tongs that open like a book and grasp the cloth of the piece by the edges; one of said pliers moves along the bar and is therefore apt to be placed in a suitable position according to the width of the piece; the tongs open like a book forced by the action of a regulator cam acting on a bolt of one of said tongs; after positioning, the clamp recovers its primitive situation and the automatic regulator gives the clamp back to the initial position; - a blade, suitable for cutting the selvedge or side panels, the "selvedge" and the "squares" of the fabric of the piece as these pieces circulate along the course of the machine; - an aspiration group, constituted by at least two channels with appropriately marked profiles, having the task of sucking the impurities present therein from the piece; - a defect detection group, which reveals the defects present in the piece by electromechanical and/or optical-electric transducers; in the first case the core of a differential transformer receives the variations of magnetic flux and transforms them into secondary induced current through contact with the tissue of a suitable sheet, linked to the core of said transformer; in the second case, a photocell detector system is used, the luminous flux variant acting in cooperation with suitable means on a photocell that acts accordingly; an electronic amplifier with possibility of regulation (in order to be able to vary "the sensitivity" of the complex) elaborates the signals of the detector device transforming them into impulses apt to govern the indicator group; - an indicator group, based on chalk, consisting of a pneumatic group and a chalk support; said pneumatic group acts either on the advance of the chalk, or on its own pressure drive on the fabric to be marked; - a folder constituted by a bar provided with an oscillating movement on a horizontal plane, provided at the end of the machine and suitable for arranging the piece under examination folded by overlap. (Machine-translation by Google Translate, not legally binding)