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US 4,046,087 AGranted
Automatic apparatus for conjointly sewing two elastic cloths having different elasticity
AssigneeSigismondo Piva S.p.A.
InventorOrlando Manetti
Life of this patent
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AssigneeSigismondo Piva S.p.A.
InventorOrlando Manetti
Estimating the term…
An apparatus for automatically sewing together two elastic cloths having different elasticity, the less elastic of which has a substantially annular shape, comprises a conventional sewing machine having its rotating devices connected with supporting and feeding means of the two cloths to be joined together, such as at least two pulleys or a funnel-shaped member, or two pairs of grippers, in combination with a means for correctly positioning the cloths within the sewing zone, which is located at 20.degree.-30.degree. before the completion of the sewing cycle, ahead of the sewing machine needle. A suction-operated device conveys the sewed, assembled pieces to a conventional spreading and discharging device, from the openable bottom of which those pieces are caused to drop into a container. The supporting and feeding means will be of the stationary type or of the movable type, in the latter case being mounted on a platform for a step-by-step station of 360.degree./n, where n is the number of units of said supporting and feeding means. This applies when the cloth of higher elasticity has an annular shape; when on the contrary it is an elongated elastic band section it is necessary to sew together the two ends of the section. This can be accomplished either by an ancillary sewing machine and a conveying system for bringing the two ends under the head thereof, or by modifying the head of the main sewing machine so that it can move transversely at right angles with respect to the main sewing path of the two cloths.
An automatic apparatus for conjointly sewing two elastic cloths having a different elasticity, the cloth with a lower elasticity having a substantially annular contour, the sewing of said cloths occurring through a sewing cycle defined by substantially 360.degree. of said annular cloth of lower elasticity, said apparatus comprising a sewing machine having a working table and a rotating member, said sewing machine having a sewing area including a sewing needle, said apparatus further comprising supporting and feeding means for the cloths to be joined on the working table of the sewing machine, said supporting and feeding means comprising a plurality of pulleys, one of which is connected to said rotating member of the sewing machine, said pulleys each having a conical portion and a cylindrical portion operable to support said cloths in overlapping position to be sewn and being positioned in a plane which is perpendicular to the working table of the sewing machine, the axis of one of the pulleys not connected to the rotating member of the sewing machine being defined by a shaft adjustable in its position relative to the other pulleys whereby the center distance between said one pulley and the other pulleys is adjustable, said shaft being fastenable in any of its positions;
Dependencies are inferred from the claim text.