Sewing – Special machines – Darning
Patent
1975-04-07
1977-09-06
Krizmanich, George H.
Sewing
Special machines
Darning
11212126, 11212129, 112211, D05B 2100
Patent
active
040460878
ABSTRACT:
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.
, 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.
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patent: 2885979 (1959-05-01), Perkins
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patent: 3500779 (1970-03-01), Jones et al.
patent: 3776155 (1973-12-01), Gratsch
patent: 3865058 (1975-02-01), Rovin et al.
Krizmanich George H.
Sigismondo Piva S.p.A.
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