Rimoldi S.r.l.

Rimoldi Necchi, S.r.l.

Franco Marchesi

Roberto Sanvito

Emilio Fietta

Ezio Maggi

Davide Artioli

In a two-needle sewing machine for making an ornamental stitch without a cover stitch, at least one intermediate lug (17) is provided which is disposed in side by side relation with respect to an upper thread take-up (13) engaged to the needle bar (7), said intermediate lug, in the absence of a workpiece (4) on the needle plate (8), is brought to a work position in which it interferes with one of the needle threads (4a, 4b) coming from an auxiliary thread take-up (12) being part of a feed unit for the needle threads. In the presence of the intermediate lug (17) in the work position, the orientation of the needle thread (4a) intercepted by said intermediate lug is suitably deviated with respect to the upper thread take-up (13), so as to cause a tension release on the needle thread itself during the raising steps of the needles (3a, 3) towards the upper dead center of their reciprocating motion.

Multi-needle sewing machine with thread tension control

A presser foot having a shoe comprising a pair of mutually facing front portions (5a, 5b) and a pair of rear portions (6a, 6b) in alignment with the front portions (5a, 5b) and connected thereto by a pair of side rocker arms (7a, 7b). The side rocker arms (7a, 7b) are pivotably supported by swinging arms (10a, 10b) linked to a small bearing frame (2). A center rocking arm (15) mounted on the bearing frame (2) acts by a pair of laterally disposed pistons (17a, 17b) on the individual swinging arms (10a, 10b) in order to mutually balance the fulcra of the side rocker arms (7a, 7b). Operating at a longitudinal opening (29) defined between the front portions (5a, 5b) is a fixed knife (32) and a movable knife (33) which are adjustable independently of each other in their vertical positioning relative to the shoe (4).

Self-adjusting presser foot for assembler sewing machines

A sewing machine comprises a bed 3 on which a work-supporting table 3a is defined and from which a post 4 carrying a cantilevered support arm 5 provided with a needle-holding head 6 at its free end, rises up. An upper shaft 9 performing a rotating motion is housed within the arm 5 and it imparts a reciprocating movement, through a connecting rod-crank linkage 10, to a needle bar 11 vertically slidable in the head 6. Along the upper shaft 9 a plurality of eccentrics 19, 20, 21 are distributed to which auxiliary sewing operation devices 22, 32, 39 detachably associated with the sewing machine 1 are operativley engageable through respective connecting rods 23, 33, 50 and transferring motion mechanisms. A preformed opening 5 is formed in the support arm 5, through which connecting rod 50 is mounted to eccentric 21. An opening 36 is formed in support arm 5 through which stem 37 passes. As a result of the preformed openings in the support arm and the eccentrics along the upper shaft, the sewing machine of the present invention provides for the connection of auxiliary sewing operation devices, through the preformed openings, and to the eccentrics on the upper shaft of a basic version of the sewing machine.

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San Martino Siccomario, Italy

Franco Marchesi