Abstract: A working site to stitch manufactured items comprises a supporting frame on which a supporting surface table (2) is defined, which surface is provided with a central area (4) having a first sewing machine (5) disposed thereon which can be used to perform the greatest number of sewing operations on a manufactured item which has to be submitted to a predetermined work cycle. Extending consecutively to the central area is a first side area (6) carrying a second sewing machine (7) adapted to be used to perform operations in intercalated relationship with the sewing operations carried out by the first sewing machine (5). A second side area (8) extending at right angles to the central area (4) on the opposite side with respect to the first side area (6) carries a third sewing machine (9) adapted to be used for trimming operations on the manufactured item as well as further operations in intercalated relationship with the operations to be performed by the first (5) and second (7) sewing machines.

Abstract: A sewing machine comprising a feed unit 10 to feed a folded tape beneath a presser foot 8, a cutting unit 15 to cut the tape upstream of the presser foot and a hemming group 21 to guide and shape the hem of a workpiece upstream of the presser foot. The feed unit 10, cutting unit 15 and hemming group 21 comprise a feed guide 11, a cutting member 16 and a hem folder 22 respectively, which are individually and selectively movable from a rest position in which they are spaced apart from a workpiece supporting table 3 and the presser foot 8 to a working position in which they are disposed close to the supporting table and presser foot to perform their operating functions.

Abstract: A sewing machine includes a presser foot 9 provided, at the front portion 9a thereof, with an engagement seat 21 through which two ribbon-like pieces of trimmings 15, 16 of different width to be individually and selectively fed to the presser foot, can be sent under a central portion 9b of the latter so that they are engaged by the line of sewing together with the workpiece. An adjustment element 23 is positioned in said engagement seat in order to define the useful width of the seat depending upon the width of the piece of trimmings to be used. A cutting unit 31 is slidably mounted along a guide element 34 and is movable from a rest position in which it is spaced apart sideways from the sewing machine supporting table 3 to a rest position in which it is located close to the supporting table to cut the piece of trimmings previously used.

Abstract: The invention herein described comprises a programmable microprocessor control unit 2 controlling a plurality of actuators 6, 7, 8, 9, 10, respectively associated with the differential feed dog, main feed dog and upper feed dog and/or with the presser foot and the tension group of an industrial sewing machine 5. On the basis of the adjustment parameters keyed-in in said control unit, each actuator individually causes the adjustment of the movements of each feed dog, of the pressure exerted by the presser foot and of the force causing the dish-shaped elements of the tension group to be moved close to each other to retain the threads interposed therebetween.

Abstract: The device herein described comprises a feed roller 12 rotated by a motor 16 and disposed before the presser foot 9 at right angles to the feed advance direction of the workpiece. Individually and selectively acting against the feed roller 12 are two pressure backing rollers 19, 20 each of which engages a respective piece of ribbon-like trimmings to push it against the feed roller which carries out the pulling thereof. The pressure backing rollers 19, 20 are supported by a swinging plate which is caused to oscillate upon the action of a fluid-operated cylinder 30 in order to make the backing rollers selectively engage with the feed roller 12 and therefore selectively feed said ribbon-like trimmings under the pressure foot 9.

Abstract: The sewing machine herein described comprises a hem folder 9 arranged to introduce an elastic band into the folded edges of a workpiece and a feed guide 16 arranged to apply ribbon-like trimmings along the edges of the same workpiece. The hem folder is oscillatably connected to the machine bed 2 and is movable, upon command of a fluid-operated cylinder 15, from a working position in which it is disposed flush with the workpiece supporting table 3 and before the presser foot 7 to a rest position in which it is tilted in front of the bed and disposed at a lower position than the supporting table. The feed guide which is connected to the machine bed by a rotary fluid-operated cylinder 20, is movable from a rest position in which it is spaced apart sideways from the supporting table 3 to a working position in which it has a free end 16a disposed before the presser foot.

Abstract: A control device for trimming knives on flat-bed sewing machines comprises a rocking lever 19 fulcrumed on a fixed pivot 20 and receiving an oscillatory motion from a connecting rod 18. The rocking lever operates a movable knife 14 through a drive group 21 provided with a movable pivot 29 slidably engaged in an elongate shaped opening 30 associated with the the rocking lever. A disengagement group 40 enables the movable pivot 29 to be brought from an engagement position in which it is in engagement with an engagement portion 30b of the elongate shaped opening 30 to operate the movable knife 14, to a disengagement position in which the movable pivot slides within a curvilinear portion 30a of the elongate opening in order to deactivate the movable knife 14. The displacements of the movable pivot 29 take place upon command of a disengagement lever 32 slidably engaging said pivot in the region of an elongate guide opening 32a.

Abstract: An improved guide device for the horizontal motion mechanism for the upper feed dog of an overlock sewing machine including an angularly adjustable bracket element that cooperates with a vertically adjustable slide to provide adjustability in the amount of shaft oscillation while attaining higher operating speeds.

Abstract: Looper for sewing machines provided with a mounting shank having a positioning flat adapted to be coupled to a coacting flat formed on a positioner member, which positioner member can be angularly fastened on a looper support so that the coupling between the looper and the positioner takes place in a predetermined angular position in one and the same hole of the looper support.

Abstract: An upper hook structure for use in conjunction with a lower hook and a needle to form overedge stitches, in which the hook has a hole, a tip curved in the direction of the lower hook and a shoulder formed in a middle position on the upper hook to stop and guide the thread of the lower hook.

Abstract: A housing forming the free bed base in a sewing machine which is detachable from the remainder of the machine and which is comprised of a tray-shaped base module on which are mounted all lower sewing members that cooperate with the needle in the formation of stitches. These members include a needle plate, closing flat plates located alongside the opposite edges of the needle plate and closing interchangeable elements defining both the front and rear walls of the housing and the remaining portion of the upper flat surface of the latter which is not covered by the closing flat plates and the needle plate.

Abstract: An upper looper for a three thread overedge stitch machine having a hole in its end and having a tip which is curved toward a lower looper to facilitate transfer of the thread of the lower looper onto the upper looper.

Abstract: A sewing machine consisting of left and right hand individual sewing machines which are joined together adjustably to provide a gap between the machine bases in which drive means are provided that includes an external drive shaft that is joined at its ends to each of the individual machines.

Abstract: An electromechanical friction clutch and brake unit is disclosed for actuating and stopping a rotating element for example, an actuating shaft of the needle of a sewing machine. The clutch and brake unit has inside it a plurality of friction elements which are mutually engageable in substantial contact, with the interposition of oil of suitable viscosity, and the friction elements are made at least partly of on oil-impregnated, sintered, metallic material, so as to form reservoirs capable of supplying the oil by means of capillarity.

Abstract: A sewing machine having a base constructed of two modules having coupling means permitting one of said modules to be quickly removed from the other so that different sewing instrumentalities can be substituted to alter the type of stitch being made.

Abstract: A sewing machine which has two substantially independent sets of feed dog teeth comprising a set of main fabric feed dog teeth and secondary or differential feed dog teeth and includes a drive therefore defined by a main drive shaft and a two piece interconnected secondary shaft. Feed dog teeth supporting brackets are mounted between the shafts. A stirrup interconnects the support brackets so that both sets of dog teeth are moved cyclically and in a synchronized manner with one another.

Abstract: A needle bar actuating device for double chain stitch and/or overlock sewing machines provided with a driving crank, one crank pin of which has three angularly differentiated reference surfaces in order to define an equal number of positions and lengths for said driving crank with respect to its axis of rotation; to each of said positions and lengths corresponding a different predetermined stroke length of the needle bar.

Abstract: A sewing machine is provided which is composed of two halves, each having sewing instrumentalities, a single, splined drive shaft and having an adjustment mechanism for connecting the two halves together so that the distances between the sewing instrumentalities can be varied.

Abstract: A machine for laying out flat sheets made from tubular fabric in which a horizontal cross bar is hingedly connected to a supporting frame and is in contact with the fabric being fed, so that variations of the tautness of the fabric causes the cross bar to pivot and change the speed of a variable speed drive motor, thereby changing the rate of feed of the fabric.