US1749118A - Sewing machine - Google Patents

Description

March 4, 1930.

s. WECHSLER SEWING MACHINE Filed Jan. 17, l92'7 2 Sheets-Sheet S. WECHSLER SEWING MACHINE March 4, 1930.

Filed Jan. 17. 1927 2 Sheets-Sheet 2 5 -WECHSLER Patenta& Mar. 4, 1 930 i UNITED mm emer oreee" SAIMUEL WECHSLEROF CLEVELAND, OHIO, ASSIGNOR OF ONE-HAJDE 'TO THE J'AITE A CORPORATION OF OHIO SEWING MAGHINE Application filed January 17 of the bag are sewed shut except at one corner where a valve is .produced thereiu to permit the bag to be filled. The paper used is gem erally of a heavy grade or quality and the many folds and plies make a stif bag which is difficult to sew under certain conditions.

In other words it has been difficult heretofore to sew both ends of the bag shut in one p operation using two sewing machines operat-' 'tionable 'result at one or both needles.

ing in unison. The Chief trouble experienced is inthe breaking of the thread or needle,

of the bag 'through both machines.. Guides are required to keep the opposite ends of the bag in proper alignment with the two sets of needles and feeding devices, but the stifi'ness of the bag, the natureof the materials, and slight differences in the placement of the plies or in the length of the bags, causes the opposite ends of the bag to 'feed irregularly er to bind and clutch' the guides with objep separate strip of binding material is also folded around each end edge of the bag and sewed -thereto by the same needles and threads, and the devices which fold these 'strips also serve to guide the hag to the 'needles According'ly my main ob3ect is to provide simple and efl'ective means for hemmin or folding separate binding strips and gui ing both ends of the ba to the needles without producing any mal unction in sewing Operations at either end of the bag, all as hereinafter shown and described and more eoncisely pointed out in the claims.

In the accompanying drawings,-Fig. 1 is a to view 'on a reduced scale of a sewin machne embodying my improvement, an Fig.

, 1927. Serial No. 161,5S0.

2 is a sectional View longitudinally and vertically thereof. Fig. 3 is an enlarged sectional View of one end of a paper bag which has been hemmed and sewed. F ig. 4 is a plan View, enlarged, of one of the folding and guiding devices, and F g. 5 is an edge View thereof. Fig. 6 is a cross section of the folding and guiding device on line 6-6 of Fig. 4; Figs. 7, 8, 9, 10, and 11, are cross sections of the pivoted iolding member on lines 7-7, 8-8, 9-9, 10-10, and 11-11, respectively, of Big. 4. Fig. 12 is a sectional View of the device on a large scale taken on line 12-12 of Fig. 4, and showing a binding strip folded around one end edge of a bag as these parts appear just before being sewed together; I

The invention comprises two sewing machines A-A mounted oppostely in spaced relaton within or upon a fiat table 2 and between which -a bag B oriother article to be stitched may be fed on a straight line by means of a pair of guide members C-C.

i Two rolls D-D of binding tape are rotatably supported upon a pairof spindle 3-3 in front of the machines A-A where the tape or strip, either of paper or fabric, may be fed around idler rollers 4-4 on straight parallel lines direct to uide members C-C. These members are al so particularly 'constructed to told the strips into U-shape around the end 'edges of bag B as the bag is fed into said guide members and passes' benath' the respective heads of the'sewing machines. As shown, a space or recess 5 is provided centrally at the front of-table2 where theoperator may Conveniently handlc and place the bags between the binding strps and guide members. The bags are made of several plies or layers of paper folded according to usual practces into: the form of a flat tube. The open ends of this tube are stitched `together or sewn shut on straight arallel lines in passing the bag `under the heads of the two sewing machines A-A, and the stitches 6 pass through the ove-lapping :tolds 7 of the U-shaped binding strip D as delineated in Fi 3 Each bindinp strip' D is gradually' fol ed into the desired U-shape as it is drawn lengthwise. around the outl &

side of guide member C which comprises a fiat horizontal base flange 9 and a vertical tia-nge 10 extending at rightangles to the .base fiange but only at the front end thereof.

Beyond that point fiangc 10 is* bent at an nclination inwardly over base fiange 9 and thcnce radually rounded and bent until it is paral el with the' base fiange to provide a deep horizontal channel 11 for the bag. A U- shaped extension 12 having reverted flanges l l-14 is rigidly afiixed to the discharge end of each channelmember C, and the space between the two fiangesl l -lt forms a continuation of channel 11 through which the bag may pass, While the U-shaped space 13 within extension 12 has a daring entrance to receive and guide the binding strip, The bag and strip are guided indep'endently of each other, that is, they do not come into contact while passing through the guide member and its extension, and therefore, one does not restrain the other be come pinched while being guided, Extension 12 promotes pla'cement and alignment of the folds of the binding strip on opposite sides of the bag preliminary to stitching the parte together, and in order that the edges of the bag may move freeiy through these guides 'without bindthe said guide extensions 12 are free to move laterally, preferably against the yielding pressure of a spring 15. Such yieldmg guides prevent cramping and restraint of movement of the bag, it being understood that the walls of the bag are quite stili and are not easily buckled while the bag is pass-- ing rapidly through a'pair of such guides during smultaneous sewing Operations at opposte ends or thebag. However, the said uides and folders are Secured to the table n definitely spaced relation for a given size or length of bag n order to promote a straight movement in a fixed path to the two attached to one side of extension i& Clip,

18 and plate 20 are bent upright at their outer endsand coiled spring 15 is interposed therebetween The plote is a rigid part of 'eitension 12 but it is loosely confined between the fianges 19 on clip 18 to permit guide member C to Swing freely on its pivot pin 17; Clip 18 has a slotted bottom adapted to receive fastening screws 21, the heads of which are exposed through openings 22 in plate 20 so that screws may be released, and

tightened and the clip shifted within limits on the table top, thus permitting adjnstment of the guide members laterally inrespect'to the edges of the' bag or to eiiect a change means 'in degree of compression of the spring The said adjustment, and the mounting of the guide members and tape folders on the table for yieldable latcral movement, may be accomplished in several ways, and therefore, I

omitted as such machines and their sewing and feeding'mechanism are well known to those skilled in the art A pair of such machines may have their movements synchronized or'driven in unison from a single countershaft 23, and when the sewing operation on a given bag is finished the strips of binding tape which connect this bag with the bag sewn in the previous operation, are cut to'separate the bags, and the operation is completed. !Che binding strip -o'r' tape is shown in the drawings as a separate piece, but the folding thereof in the 'guide mernbers corresponds to a hemming operation, and where a bag is particularly constructed to be hemmed in lieu of attaching a separate binder the guide members C-C may also be used for that purpose.

`What I claim, is:

i. ln a double-headcd sewing machine of the character described, the combination of two sewing appliances arranged in spaced rclation, a pair of correspondingly spaced folders, automatically Operating means for varying the distance between said folders during the sewing-induced passage between said folders 'of articles of unequal dimension measured cross-wise of their direction of movement and means for perating said sewng appliances.

2. ln a double-headed sewing machine of the character described, duplex sewing appliances arranged in spaced relation, a pair of correspondingly spaced folders mounted for movement toward and away from each other and ahead of said sewing appliances with reference to the direction of intendedtravel of an article to be' operated upon, springs arranged to resist the separating movement of said folders toward positions a greater distance apart than the needles on said double head and mechanism for sewing laminated ed es of articles and for drawing them forward? i g 3. In a double-headed sewing machine, the

combination for sewingo posite edges oi articles likely to vary in wi th, comprising a' support, a pair of folders spaced apart to correspond with the needles on. the double head, and mechanism yieldingly connecting said folders with said support and adapted to permit them automatically to approech or.

recede from each other bodily according to any unforseen araton n crosswse dmem sions of material being drawn therebetween. 4. In a double-headed sewng machine, the combination for sewing opposite ends of articles likely to vary in length, comprising a support, a pair ofuides pivoted on said support and substantally defining the distance between needles ofthe double head, a pair of folders alined with said guides respectively, and located'between them and the needles, and mechanism 'yieldingly connecting said folders with said support whereby to permit them automatically to approach or recede from each other according to any change of length of the article being drawn therebetween. A

5. In a double-headed sewing machine, the combination for sewing opposite ends of arti cles likely to vary in length, comprising a. pair of supports in spaced relation, a pair of folders substantially definin the distance between needles of the double ead, a pair of guides alined and connected with said folders, said folders being located between said guides and the needles and mechanism yieldingly connectin said folders with said supports respective y. i

6. In a double-headed sewing machine, the combination for sewing opposite ends of articles likely to vary in length, comprising a pair of supports definitely spaced substantially the distance between needles of the double head, a pair of folders located at the i near sides of and yieldingly connected with said supports for movement toward and away from each other, said folders being adapted constantly and automatically to approach or recede from each other according to any chane of length of the article being drawn there etween by the sewing operation. In testimony whereof I affix my signature.

SAMUEL `WECHSLER-.

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