US1743817A - Attachment for sewing machines - Google Patents

Description

Jan. 14, 1930.. w. C. l -|AKE ,7 7

ATTACHMENT F OR SEWING MACHINES Filed March 7 1929 Patented Jan. 14, 1930 UNITED STATES WILLIAM C. HAKE, OF ST. LOUIS, MISSOURI ATTACHMENT FOR SEWING MACHINES Application filed March 7,

This invention relates to an attachment-for sewing machines particularly adapted for feeding tape to forma French binding for shoes.

An object of the invention is to provide an attachment whereby tape from a continuous row may be fed to the stitching point for attachment to the edge of shoe uppers, which attachment is adapted to wipe out the upper .10 edge of the tape and to prevent it fromcoming in contact with the needle in the stitching operation.

Another object of the invention is to provide an attachment of the kind described having an adjustable device for holding the top margin of the tape above the stitching point, said attachment being adapted for adj ustment to tape of difierent widths.

Additional advantages of the construction will be apparent from the following detailed description taken in connection with the accompanying drawing, in which 7 Fig. 1 is a front elevation of the attachment and associated parts. Fig. 2 is a side view of the same elements. Fig. 3 is a transverse section showing the parts in detail.

Fig. 4: is a front face view of the roller with 'the adjustable device associated therewith.

Fig. 5 is a detailed view of the mounting for the adjustable device.

Fig. 6 illustrates a portion of a shoe upper with a tape attached to the margin thereof.

Fig. 7 is a sectional view showing the meansfor adjusting the device for tape of different.

widths. e In the embodiment of the invention illustrated in the drawing the attachment is shown in association with a sewing machine having a top arm 1 illustrated fragmentarily in Figs. 1 and 2. A needle bar 2 carrying a'needle 3 is mounted in the arm 1 for vertical reciprocation. The arm 1 has connected therewith a bracket 4:. An arm 5 is removably attached to the bracket a, said arm 5 curving inwardly and downwardly. The arm 5 has connected to its lower end a stud bolt 6 which constitutes a shaft for a presser roller 7 The front face of the presser roller is dishedas clearly shown in Fig. 3 of the drawing, and the periphery 1929. Serial No. 345,018.

of the roller comprises a serrated face 8. The roller 7 is mounted upon its shaft in a forwardly inclined position as best shown in Fig. 3 of the drawing.

The mechanism for feeding the tape includes an arm 9 removably attached to the bracket 4, said arm extending rearwardly and member that includes a plate 10 having an eye 11 attached to its rear edge, said plate extending at the back of the attachment and communicating with a tape feed tube 12 that extends across the front face of the presser r ller. The tape feed tube comprises a front and rear wall joined together so that said walls lie close together and so that the vertical dimension is sufficient to accommodate, at its inlet end, tape of varying widths fed to the stitching point. The forward throat ofthe tube is deflected slightly outwardlyat 13 for turning the lower marginal edge of the tape to meet the surface of the shoe upper in a plane parallel therewith at the stitching point, in cooperation with the beveled wall of the presser roller. The forward throat of the tape tube 12 has a single wall extension 14,

the upper marginal edge of-which is slightly notched at 15, as shown in Fig. 2. of the drawing. The purpose of the extension 14 is to hold the upper marginal edge of the tape out of the path of the needle.

. In order to accommodatethe device for feeding different widths of tape, an adjustable member isprovided to engage the upper marginal edge of the tape as it leaves the throat of'the tape feed tube. This member comprises a stem 16 mounted in a bracket 17 attached to thefront face of the upper portion of the arm 9. An expansion spring 18 is mounted on the stem 16"between the lower face of the bracket 17 and a flange 19 on the stem. An adjusting nut 20 is mounted over a threaded end of the stem for raising the stem in the bracket17 against the tendency of the spring 18 to depress the stem. Thus, thestem may be raised and lowered by'the operator. When the proper adjustment of the stem has been. attained, it maybe setvin position by a set screw 21 threaded into'the face of the bracket 17 and against the stem.

downwardly and supporting a tape guide The bracket 17 is connected with the arm- 9 by a stud 22 that extends through an elongated opening 23 in the arm 9. A nut 24 threads over the extremity of the stud 22 so that a slight longitudinal adjustment of the bracket 17 may be effected. Below'the flange 19 is an extension of the stem constituting an angular arm-25, the lower portion of which extends rearwardly and downwardly to a point below the upper edge of the tape feed tube. The extremity 26 of" the arm 25 is bifurcated and is inclined inwardly to an apex, clearly shown in Fig. 4 of the drawing. The space between the armsformingthe bifurcated extremity constitutes a channel-through which the uppermarginal edge ofthe tape passes as-it' is fed through the clev-ice. By varying the tension ofthe spring 18, the elevation of the seat of the channel fo'rrnediirthe bifurcated extremity 26 may be'accurately adjusted. Therefore, when the tape of varyingwidths is used, the pressure onthe upper marginal edge thereof may be accurately adjusted" so that the lower marginal edge of the tape is forced into the lower channelin the tape feedingtube, toward the marginal edge thereof, along an accurately positioned line in respect of the needle which passes through the tape as it leaves the deflected plortion 13 of the throat of the tube. Theextremity 26 also serves to hold the upper marginal edgeof'the tape in a vertical positionand to prevent it from curling inwardly and therefore out of 'the path of the needle The device is so constructed asto accurately lay the tape at the stitching point, regardlessof the' nature'of the contour ofthe shoeupper to which the tape is to be attached.

I am aware that the invention" may be va-rie'din numerous particularswithout" departing from the nature and principle thereof. r

I'- do" not limit myself u'nessentially, but

what I claimand' desire to secure-'- by Letters; Patentis:'

1 In a. sewing machine, the combin-ation with stitchlng IHBClliL'IlISHI and feeding mechanrsm, said feeding mechanism lncluding a M pressenroller having a concave face; of an attachment adapted to feed tape tothe stitching'po'int comprising'the tape feed'tube arranged'vertically adjacent to the concave face ofsaid roller, and having an outwardly turned turn-ed portion near it'slower'marginal edge, whereby the tape is fed against the concave face of the presser roller and-the outer edge thereofis-presented to the stitching point in substantially a horizontal plane; and'an adjustable member having a vertical channel therein fer-engaging the upper marginal edge of theta'p'el 2;] In a sewing machine, the combination with stitching mechanism andfeedin'gmech anism, saidfeeding'mech'anism including a presser roller having a concave face; of an attachment adapted to feed tape to the stitching point comprising the tape feed tube arranged vertically adjacent to the concave face of said roller, and having an outwardly turned portion near its lower marginal edge, 1-

whereby the tape is fed against the concave face'of thepresser roller and the outer edge thereof is presented to the stitching point in substantially a horizontal plane; and an adjustable member comprising a stem having an angular extremity adapted to engage the upper marginal edge of the tape and to hold it in substantially vertical position with a predetermined downward pressure thereon.

3. In a sewing machine, the combination withstitching: mechanismand I feeding mechanism, said feeding mechanism includ ing a-p'resser' roller having a concave face; of an attachment adapted to feed tape to the stitching pointcomprising the tape feed tube arranged vertically adjacent to the-concave face of said-roller, and-having anoutwardly turned portion near its lower marginal edge, whereby the tape is fed againstthc concave faceofthe presser roller andthe outer edge thereof is presented to the stitching point in substantially a horizontal plane; and an adjustable member comprising vertically movable stem, a spring normally actuating said stem downwardly, an'adjusting nut operating in opposition to said spring, an -angular extensionfo'r said stem having a channel form'ed'in its-lower end, saidcha-nnel adapted to provide a guideway for the upper marginal edge of the tape 'and't'o' hold the upper m'arg-inal edge of the tape'in' a vertical position and to force the body of the tape againstthe lower wall of the tape feed tu e.

41: Tina sewing machine, the combination with stitching: mechanism andfeeding mechanism, said feeding mechanisrn includ-' ing a presser rollerhaving a" concave face of-an attachment adapted to feed tapeto the stitching point comprisingthe tape feed tube arranged vertically adjacent to'the concave face of -sa idfroller, and hfaving an outwardly turned portion near its lowermarginal-edgc, 'whereby'the tape is fed against the concave face of' the presserroller and the outer edge thereof is presented to the stitching point-in substantially a horizontal plane; and an adjustable member comprising a vertically movable stem; a spring: normally actuating said stem'downwardly, an adjusting nut'opcrating in opposition to said spring, an angular extensionfor'said stem having-a channel formed inits lower end, said channel adaptedto provide a guideway' for the upper marginal edge of the tape and to'holdthe upper marginal edgeof thetape in a ver'- tical position and to force the body of the tape against the lower wall of the tape feed tube, and -asetscrew adapted to lock the stemin its selected iadjastew positions! 5. In a sewing machine, the combination I with stitching mechanism and feeding mechanism, said feeding mechanism including a presser roller having a concave face; of an attachment adapted to feed tape to the stitching point comprising the tape feed tube arranged vertically adjacent to the concave face of said roller, and having an outwardly turned portion near its lower marginal edge, and a single wall extension from the upper edge of the throat thereof, whereby the tape is fed against the concave face of the presser roller and the outer edge thereof is presented to the stitching point in substantially a horizontal plane; and an adjustable member having a vertical channel therein for engaging the upper marginal edge of the tape.

WILLIAM C. HAKE.

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