Патент USA US3082734код для вставки
March 26, 1963 3,082,724 J. M. wAsHBuRN STITCH FORMATION Filed Dec. 29, 1958 2 Sheets-Sheet 1 fnvení?or: Ba John/MWìLsh/burn í’ #5M His At orne'ys March 26, 1963 3,082,724 J. M. wAsHBURN STITCH FORMATION Filed Deo. 29, 1958 2 Sheets-Sheet 2 In ven/tor: JohnM Washburn, 133,7/ United States Patent Office 3,082,724 Patented Mar. 26, 1963 2 l wardly a sufficient distance to bring the bight of loop 6 into registering paired relationship with the bight of a 3,082,724 STITCH FORMATION loop 4. A straight run of thread 2, as 6', extends next to run 4’ of thread 1 and from one penetration point 5 _ John M. Washburn, West Hartford, Coun., asslgnor t0 The Morrow Machine Company, Hartford, Conn., a corporation of Connecticut Filed Dec. 29, 1958, Ser. No. 783,397 5 Claims. (Cl. 112-269) ' to another. A third continuous thread 3, comprising a covering or locking thread, is formed into a series of loops 12 and runs 12’. Each loop 12 is looped through the bights of a registering pair of loops 4 and 6 of threads 1 and 2 This invention relates to stitch formation, and more particularly to an improved form of three thread over 10 respectively and from this point extends obliquely over the upper surface of work material to the anchorage or edge stitch particularly .adapted to join work material penetration point 5 of the next succeeding registering edges either when the plies of material are in superim pair of loops 4 and 6 where the bight of loop 12 extends posed relation or in a relationship that is established when around the bases or ends of adjacent loops 4 and 6 to superimposed plies of material with the stitching applied thereto are opened or hinged into a relationship wherein 15 maintain runs 6’ of needle thread 2 in close relationship with runs 4’ of needle thread 1. the fabric edges become what is commonly designated When the previously superimposed plies of work ma an abutted seam. terial M1 and M2 are opened as a hinge into abutted relation as shown in FIG. 2 it is seen that loops 4 of overedge stitch for joining work material, the stitch being effective to maintain plies of material in abutted relation 20 thread 1 extend on the under side of the material directly from penetration points 5 in material M1 to penetration ship even if one of the needle threads is broken. points S’ in material M2. Runs 4’ of thread 1 are Other objects and advantages of the invention will on the upper surface of work material M1. Also it is become apparent by reference to the following specifica A primary object of the invention is to provide an tion taken in conjunction with the accompanying draw ings. seen that the penetration points 10, 10’ for loops 6 of 25 thread 2 are, in respect to each ply of work material M1 In the drawings: FIG. l is a perspective view showing a partially com pleted seam to which stitching has been applied in accord ance with the invention; and FIG. 2 is a perspective view showing the stitch of the 30 present invention with work pieces abutted. The stitch 0f the present invention is formed from three continuous threads: needle threads 1 and 2 and covering thread 3. The threads 1, 2 and 3 may be formed into the seam by a two needle Merrow overedge sewing 35 and M2, laterally offset outside the alignment of penetra tion points 5, 5’ respectively »for loops 4 of thread 1. Loops 12 of thread 3 with their bights anchored .at pene tration points 5, extend on the upper surface of both plies of work material and thence through registering bights of loops 4 and 6 included in a preceding unit of stitch formation. Inasmuch as the bight of loop 6 is anchored in its registering relationship with a bight of a respective loop 4 the position of penetration 10' in work material M2 becomes offset from the line of runs 12’ of loops 12. This offset of penetration points 10’ in material M2 is permitted by excess thread provided when the loops 6 are extended through the fabric plies when they are iu superimposed relation. by the loopers of the machine. To form a seam joining Because of the above described relationship, if either work material along an abutted edge, the work material 40 needle thread 1 or Z is broken, the other thread will is positioned, as shown in FIG. l, in two plies M1 and machine of the type manufactured by the assignee of this application; threads 1 and 2 being placed by the needles of the machine and covering thread 3 being manipulated M2 which are superimposed upon each other with the edges to be joined in vertical alignment. Needle thread 1 is formed into a series of fabric penetrating loops such as 4, connected in series by runs such 4as 4’. Each loop 4 extends from its open end or base at a penetration point hold the seam with the edges of plies M1 and M2 main tained in abutment. The foregoing description is to be considered exem plary rather than limiting and the true scope of the in vention is that defined by the following claims. I claim: 5 through the fabric, thence along the under surface of 1. An overedge chain stitch seam comprising a pair` of the fabric to a point beyond the fabric edge and thence upwardly to locate the closed end or bight o-f the loop 50 continuous needle threads for-med into two series of loops penetrating a piece of fabric at different distances from adjacent the aligned edges ysubstantially in a plane coin one edge of the fabric and having portions extending be cident with that of the upper surface of the work material. yond said edge, and a covering thread formed into a corre Penetration points 5 lie along a line which is generally sponding series of loops interlooped with the loops of said parallel to the edge of the work material, the line of needle threads yby extending through said portions of the penetrations being spaced from the edge of the fabric loops of both needle threads and about adjacent loops of by a ñxed distance. both needle threads at the points where the series of loops As will more clearly be apparent, the arrangement of threads at these points 5 of fabric penetration serves as an anchorage. A loop of needle thread 1 starts from of that one of said needle threads closest to said edge penetrate the fabric. 2. An overedge chain stitch seam comprising a first a point of .anchorage 5 and extends directly through the 60 continuous needle thread formed into a ñrst series of loops Worn material, `but a loop of needle thread 2, as loop 6, has its open end or base located at a penetration point 5 and passes from there along the upper surface of the work material to a fabric penetration point as 10. These penetrating a piece of fabric at spaced points lying along a ñrst line spaced inwardly from an edge of said fabric, a second continuous needle thread formed into a second series of loops passing through said fabric at spaced points penetration points 10 are laterally aligned with pene 65 lying along a second line located between said edge and tration points 5, since the thread placing needles of the said first line, both of said series of loops having bight two needle overedge machine are parallel to each other, portion-s projecting from one surface of said fabric, the and lie along a line parallel to the line of penetration bight portions of each loop of said ñrst series being lo points 5 but at a greater distance from the edge of the cated adjacent the bight portions of a loop of said second work material. Each loop 6 emerges from a fabric pene series, and a continuous covering thread »formed into a tration 10 and continues along the under surface of the fabric to a point beyond the fabric edge ,and thence up third series of loops, each loop of said third series being looped through adjacent bight portions of loops of said 3,082,724 3 iirst and said second series and having bight portions looped around adjacent loops of said first and said second series on the opposed surface of said fabric at points of fabric penetration lying on said second line. 3. An overedge chain stitch seam comprising a first continuous needle thread formed into a ñrst series of fabric penetrating loops connected by runs of said first thread lying on one surface of a piece of fabric in gen erally parallel spaced relationship with an edge of said 4 other series extend through the fabric, said covering thread comprising a series of loops with each loop looped through adjacent loops respectively of the two needle threads at a point adjacent the fabric edge, each loop of said covering thread having a bight portion looped about adjacent loops respectively of the two needle threads at a point in the line of needle penetrations nearer the fabric edge. 5. An overedge seam for joining portions of work ma fabric, each loop of said first series extending from be 10 terial along a line Where two sections of material are in tween adjacent runs of said first thread away from said abutted relaitonship, the seam being formed from two edge and through said fabric at a penetration point and continuous needle threads and a continuous covering having a bight portion projecting from the opposite sur thread, said .threads being interlooped with each other in face of said fabric at said penetration point and beyond regular succession adjacent the abutment line, each of the said edge, a second continuous needle thread formed into 15 needle threads being formed into a series of loops with a second series of fabric penetrating loops connected by each loop of one series extending through the fabric on run-s of said second thread lying on said one surface of opposite sides of the line of abutment at respective points said piece of fabric contiguous to and substantially co-ex of needle penetration spaced respectively further from the tensive with said runs of said lirst thread, each loop of line of abutment than corresponding points of needle said second series passing through said fabric at a penetra 20 penetration of the other series of loops, said covering tion point located between adjacent runs of said ñrst thread comprising a series of loops with each loop looped thread and having a bight portion projecting yfrom said through adjacent loops respectively of the two needle opposite surface of said fabric beyond said edge into ad threads at a point on one side of the line of abutment jacent relationship with the bight portion of the adjacent and having a lbight portion looped about adjacent loops loop of said first series, and a continuous covering thread 25 respectively of the two needle threads at a point in the formed into a third series of loops, each loop of said third series extending through the bight portions of adjacent loops of said first and said second series and across said one surface of said fabric beneath next adjacent runs and around the loops of said `first and said second series con 30 nected between next adjacent runs. 4. An overedge seam for-med `from two continuous needle threads and a continuous covering thread, said threads being interlooped With each other in regular suc cession adjacent one edge of a piece of fabric, each of 35 said needle threads being `formed into a series of loops with the loops of one series extending through the fabric at points of penetration spaced further from Vthe fabric edge than points of penetration where the loops of the line of needle penetrations nearer the line of abutment. References Cited in the tile of this patent UNITED STATES PATENTS 811,789 875,594 Onderdonk ___________ __ Feb. 6, 1906 Onderdonk __________ __ Dec. 3l, 1907 2,787,233 2,903,872 2,980,917 Walling ______________ __ Apr. 2, 1957 Ledwell ____________ __ Sept. 15, 1959 Slane _______________ __ Apr. 25, 1961 OTHER REFERENCES ‘Federal Standard Stock Catalogue, Section lV, Part 5, March 4, 1930.