Device for making slit facings of a garment

Claim 1

A device for infolding margins of a binding strip, folding said strip about a longitudinally directed main fold line, sewing said folded binding strip to one edge of a slit of a shirt sleeve or a tubular garment and securing the area where the two edges of said slit meet, by means of a stitch row, said device comprising a support, a sewing machine having a reciprocating needle, a throat plate and a workpiece press pad, a workpiece receiving and folding unit, comprising a binding strip receiving plate for supporting said strip with margins projecting therefrom and consisting of a left half and a right half pivotally connected in the longitudinal direction, a defining blade arranged above said binding strip receiving plate and determining the form of said binding strip, and including a left blade half and a right blade half in swivel connection, infolding blades cooperating with said defining blade, for folding said margins of said binding strip about the edges of said defining blade, means for turning one of said halves of said binding strip receiving plate, one of said halves of said defining blade together with one half of said binding strip being clamped to said defining blade by said infolding blades about said longitudinally directed main fold line of said strip into a receiving position for said slitted shirt sleeve, and clamping said folded binding strip between said two halves of said binding strip receiving plate, and means for retracting said infolding blades and releasing said edges to be sewn from said defining blade halves, and means for moving said binding strip clamped to said shirt sleeve relatively to said needle of said sewing machine in order to stitch said infolded edges of said binding strip to said one edge of said slit and producing said stitch row for securing the area where said two edges of said slit meet.

Claim 2

A device for infolding margins of a binding strip, folding said strip about a longitudinally directed main fold line, sewing said folded binding strip to one edge of a slit of a shirt sleeve or a tubular garment and securing the area where the two edges of said slit meet, by means of a stitch row, said device comprising a support, a sewing machine having a reciprocating needle, a throat plate and a workpiece press pad, a workpiece receiving and folding unit, comprising a binding strip receiving plate for supporting said strip with margins projecting therefrom and consisting of a left half and a right half pivotally connected in the longitudinal direction, a defining blade arranged above said binding strip receiving plate and determining the form of said binding strip, and including a left blade half and a right blade half in swivel connection, infolding blades cooperating with said defining blade, for folding said margins of said binding strip about the edges of said defining blade, means for turning one of said halves of said binding strip receiving plate, one of said halves of said defining blade together with one half of said binding strip being clamped to said defining blade by said infolding blades about said longitudinally directed main fold line of said strip into a receiving position for said slitted shirt sleeve, and clamping said folded binding strip between said two halves of said binding strip receiving plate, and means for retracting said infolding blades and releasing said edges to be sewn from said defining blade halves, and means for moving said binding strip clamped to said shirt sleeve relatively to said needle of said sewing machine in order to stitch said infolded edges of said binding strip to said one edge of said slit and producing said stitch row for securing the area where said two edges of said slit meet.

Claim 11

A device for infolding margins of a binding strip, folding said strip about a longitudinally directed main fold line, sewing said folded binding strip to one edge of a slit of a shirt sleeve or a tubular garment and securing the area where the two edges of said slit meet, by means of a stitch row closed upon itself, comprising a support, a stationary sewing machine having a reciprocating needle, a throat plate having a cylindrical stud with a stitchhole for said needle and a workpiece press pad having a tubular part for the passage of said needle and for pressing said binding strip upon said cylindrical stud of said throat plate during sewing, a workpiece receiving and folding unit, comprising a binding strip receiving plate for supporting said strip with margins projecting thereof and consisting of a left plate half, a right plate half, end pieces attached to each of said left plate half and said right plate half, and swivel connecting means between said end pieces and said left and said right plate halves, a defining blade arranged above said binding strip receiving plate, including a left blade half and a right blade half, said blade halves being provided with longitudinally and angularly extending edges determining the form of said binding strip, infolding means, comprising a left and a right infolding blade half for folding the longitudinal margins of said binding strip about said longitudinal edges of said left and said right defining blade halves, a left tip infolding blade cooperating with said angularly extending edge of said left blade half, a right tip infolding blade cooperating with said angularly extending edge of said right blade half, an auxiliary infolding blade cooperating with said angularly extending edge of said left blade half of said defining blade for preventing accumulations of material, and control means for operating said infolding means, means for turning one of said halves of said binding strip receiving plate together with one of said end pieces, and one of said halves of said defining blade together with one half of said binding strip being clamped to said defining blade by said infolding blades about said longitudinally directed main fold line of said binding strip, into a receiving position for said slitted shirt sleeve, and clamping said folded binding strip between said two halves of said binding strip receiving plate, means for retracting said left and said right defining blade halves out of said area where said two edges of said slit meet, and out of the path of motion of said needle of said sewing machine, when said needle completes the last portion of said stitch row closed upon itself, and means for retracting said infolding blades, said left tip infolding blade, said right tip infolding blade and said auxiliary infolding plate, means for moving said binding strip clamped to said shirt sleeve along said needle of said sewing machine, in order to stitch said infolded edges of said binding strip to said one edge of said slit, and for producing said stitch row for securing the area where said two edges of said slit meet, and means for resetting said removable end pieces from the extended positions caused by said cylindrical stud when abutting against said removable end piece swingably attached to said right half of said binding strip receiving plate, and by said tubular part of said workpiece press pad when abutting against said removable end piece attached to said left half of said binding strip receiving plate, into the initial positions after completing said last portion of said stitch row closed upon itself.

Claim 12

A device for infolding margins of a binding strip, folding said strip about a longitudinally directed main fold line, sewing said folded binding strip to one edge of a slit of a shirt sleeve or a tubular garment and securing the area where the two edges of said slit meet, by means of a stitch row closed upon itself, comprising a support, a stationary sewing machine having a reciprocating needle, a throat plate having a cylindrical stud with a stitchhole for said needle and a workpiece press pad having a tubular part for the passage of said needle and for pressing said binding strip upon said cylindrical stud of said throat plate during sewing, a workpiece receiving and folding unit, comprising a binding strip receiving plate for supporting said strip with margins projecting thereof and consisting of a left plate half, a right plate half, end pieces attached to each of said left plate half and said right plate half, and swivel connecting means between said end pieces and said left and said right plate halves, a defining blade arranged above said binding strip receiving plate, including a left blade half and a right blade half, said blade halves being provided with longitudinally and angularly extending edges determining the form of said binding strip, infolding means, comprising a left and a right infolding blade half for folding the longitudinal margins of said binding strip about said longitudinal edges of said left and said right defining blade halves, a left tip infolding blade cooperating with said angularly extending edge of said left blade half, a right tip infolding blade cooperating with said angularly extending edge of said right blade half, an auxiliary infolding blade cooperating with said angularly extending edge of said left blade half of said defining blade for preventing accumulations of material, and control means for operating said infolding means, means for turning one of said halves of said binding strip receiving plate together with one of said end pieces, and one of said halves of said defining blade together with one half of said binding strip being clamped to said defining blade by said infolding blades about said longitudinally directed main fold line of said binding strip, into a receiving position for said slitted shirt sleeve, and clamping said folded binding strip between said two halves of said binding strip receiving plate, means for retracting said left and said right defining blade halves out of said area where said two edges of said slit meet, and out of the path of motion of said needle of said sewing machine, when said needle completes the last portion of said stitch row closed upon itself, and means for retracting said infolding blades, said left tip infolding blade, said right tip infolding blade and said auxiliary infolding plate, means for moving said binding strip clamped to said shirt sleeve along said needle of said sewing machine, in order to stitch said infolded edges of said binding strip to said one edge of said slit, and for producing said stitch row for securing the area where said two edges of said slit meet, and means for resetting said removable end pieces from the extended positions caused by said cylindrical stud when abutting against said removable end piece swingably attached to said right half of said binding strip receiving plate, and by said tubular part of said workpiece press pad when abutting against said removable end piece attached to said left half of said binding strip receiving plate, into the initial positions after completing said last portion of said stitch row closed upon itself.