Abstract: A sewing device for producing piped openings such as pocket slashes, with or without a pocket flap. The sewing device includes a two-needle sewing machine having a vertically moveable center knife for cutting an opening to be piped, a cutting device including two vertically moveable angle cutting knives for performing gusset cuts, and a material transport device for receiving material to be sewn and transporting such material between the sewing machine and the cutting device. Also provided is a control system including a microprocessor for adjusting the operating positions of the various components to move the points of commencement of the parallel seams, the center knife, and the angle cutting knives, individually or jointly, forward or backward, to conveniently and selectively change these sewing parameters in response to the specific workpiece. In one embodiment, a common drive motor is provided for the two-needle sewing machine, the transport device, and the cutting device.

Abstract: A pocket opening sewing machine including a cutting device for producing two notching cuts at the ends of a pocket opening. The sewing machine has sewing needles and a belt driven clamping device for clamping to the sewn parts for advancing them in an advancing direction. The cutting device includes two knives spaced apart. The knife that is further from the sewing needles is movable toward the stationary knife that is closer to the needles. For adjusting the spacing between the knives, the movable knife is temporarily clamped to a moving belt which moves it toward the stationary knife. An adjustably positionable stop defines the furthest limit of spacing between the stationary and movable knives and a spring drives the movable knife against the stop. The clamping of the movable knife to the belt is initiated by a sensor which senses the passage of a sewn part and which operates a microcomputer with pocket length information stored in it to move the movable knife when required over the distance required.

Abstract: In a button-hole sewing machine where a piece of cloth is cut from a button hole before or after the sewing operation, a moveable knife cooperating with a stationary knife is driven through a mechanical linkage by an air drive unit and the operating pressure and speed of the moveable knife are changed by adjusting the device associated with the air drive unit.

Abstract: The invention relates to a sewing device which includes a sewing machine fixedly provided on a horizontal top surface of a bench, a fabric transfer mechanism for holding and making a fabric movable on the tip surface of the bench between a first position and a second position with a machine sewing portion being interposed therebetween and a pulse motor interlocked with the fabric transfer mechanism to move the mechanism. The machine sewing is performed during the movement of the fabric transfer mechanism from the first position to the second position. The device further includes a memory portion for storing length data of a plurality of seam lines to be stitched on the fabrics, the seam lines being different in length from one another.

Abstract: The present invention relates to an automatic piping machine characterizing that after giving a cut to the opening of pockets by a center knife on suit materials simultaneously with the stitching of both sides thereof by two needles a chevron-shaped cut is given to both ends of aforesaid cut, that by mechanical means said needles and the operation limit switch of center knife and the stopper of corner knife are set to respectively travel simultaneously to opposite direction for an equal distance in order to automatically regulate the working positions of said needles, center knife and corner knife in line with the change in pocket sizes.

Abstract: A machine for making welted openings in a piece of material or similar, comprises control means arranged so as to cause it to make, in a pre-established sequence and cyclically, a succession of welted openings having different lengths requiring respectively single and indentical manual actions for starting up. The control means comprise:input means for feeding in initially and in the pre-established sequence information concerning the lengths of the different welted openings to be made,memory means for memorizing the set of length data fed in,selection means combined with the memory means so as to select successively in the pre-established sequence the lengths of the welted openings to be made,and monitoring means under the control of the selection means for, once the machine has been started up, checking the movement of cutting, stitching and notching members with respect to the selected length.

Abstract: An assembly at a sewing machine for forming a piped-edge or bound pocket opening in a garment workpiece includes a pair of sewing needles for stitching two parallel seams in the workpiece and in a reinforcing strip laid thereon, a blade for cutting a slit in the fabric pieces between the two seams and a pair of cross-sectionally angular cutters removably clamped to the plunger of a pneumatic actuating cylinder and having vertices engaging opposite sides of a mandrel also mounted on the plunger. Upon charging of the cylinder, the mandrel passes through an end of the slit to widen same and consequently enable the traversing of the slit by one or the other of the angular cutters, whereby one cutter is effective to form a V-shaped incision in the fabric pieces at the slit end and the other cutter is ineffective.

Abstract: There is disclosed mechanism for controlling the workpiece pressure grippers of buttonhole bar tacker sewing machines, such machines having means for selectively cutting the buttonhole either before or after the sewing operation. The controlling mechanism comprises a first disengaging member for controlling the pressure grippers, and a second disengaging member for selectively starting and stopping the machine. The two disengaging members are disposed in the path of rotary motion of at least one part coupled in the motion both with the device for driving the workpiece support plate of the machine and with the cam which controls the cutting knife of the machine.

Abstract: A two-needle sewing machine includes a machine casing having a sewing head mounting the needles, a work support plate, and a ripping knife supported in the sewing head and working between the needles to form an elongated slot of a braid opening in a cut garment piece. A supporting bar is guided in the machine casing for longitudinal displacement perpendicular to the work support plate, and is rotatable into different angular positions. A single angular cross-section cutting knife is mounted on the supporting bar and serves as a tool for making diverging corner cuts at the opposite ends of the elongated slot. Air-operated piston-cylinder actuators are provided to rotate the supporting bar between two positions spaced angularly by 180.degree., and to displace the supporting bar longitudinally to effect the diverging corner cuts. The sewing head mounts a sliding foot arrangement for moving the work in a direction opposite to the normal work feeding direction.

Abstract: A folding mechanism, for a braid strip, is supported on a table plate, in which there is installed a tow-needle sewing machine having a cutting knife working between the needles, with the folding mechanism being inclined downwardly toward the stitch forming area of the sewing machine. Folding of the braid strip is effected by a shape bar, having an inverted T-shape, adapted to be lowered into a folding groove, in a baseplate of the folding mechanism to fold the braid strip so that its borders extend upwardly. Clamping bars are displaceable parallel to the stem of the shape bar, on opposite sides thereof, to clamp and fold the braid strip around the shape bar.

Abstract: Arrangement for producing piped openings in cut blanks of garments, comprising a displaceable supporting plate and a folding device including a folding slide for piping strips defined by movable folding tools and a working blank clamp displaceable relative to the needles of a double needle sewing machine having a separating cutter working centrally between the needles and adapted to be lowered upon the cut blank, two folding and clamping rails defining a folding shaft between them supported for vertical movement and pivotally supported at their upper ends for rocking movement toward and away from one another and relative to said folding slide, means for raising and lowering said folding and clamping rails together by an adjustable distance relative to a cut blank in said folding shaft.