US2173509A - Hemming attachment for sewing machines - Google Patents

Description

Sept 19, k1939V` E. J. swANsc-:N 2,173,509

HEMMING ATTACHMENT FORSEWINGl MACHINES Filed bec. 17, 1938 In@ "MW 'u mmm,

INVENTOR.

Elle/2 LSH/@125012 l B j. Z i, M/ATTORNEY -a guiding and Patented Sept. 19, 1939 PATENT oFF-Ica l HEMIHING ATTACHMENT FOR.l SEWING .MACHINES Ellen J. Swanson, Manchester, Conn. Application December 17, 1938, Serial No. 246,364

,' 4 Claims. (c1. 11a-141) This invention relates to hemming attachments for sewing machines and particularly toa narrow hemming attachment for turning the edge of' -a cravat or handkerchief prlor to its being stitched, the attachment serving to retain the folded edge of the material in .position for stitching immediately in advance of the needle.r

A primary object of the invention is to provide turning attachment for the edge of textile materials which will form a very narrow hem along the edge of the material and which will also fold within the hem any loose threads extending from the edge of the material.

One feature which enables me to accomplish the above named object is that a metal loop is formed on the attachment connecting the longitudinal edges of the guiding members'between which the fabric extends while being folded, this loop being at an intermediate position` along these guiding members.

Another feature that is important is that the loop is preferably formed by means of an integral projection extending laterally from a longitudinal edge of one of the hem forming members and bent over upon the companion hem.forming member and preferably made fast thereto adjacent its edge.

With the above and other objects in view the invention may include the features `of construction and operation set forth in the following specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed. hereto and forming a' part of this specification, I have shown the invention embodied in a hemming attachment of the spring type for extremely narrow hems but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as dening or `limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Fig. 1 is a side elevation of a hemming attachment forming the present invention shown in position on a sewing machine;

Fig. 2 is a plan view of the parts shown in Fig. 3 is a perspective view of the hemming attachment shown in Figs. 1 and 2 upon an enlarged scale;

'of fabric guiding members Fig. 6 is a perspective lview of the hemmer' cut off at the short loop connecting adjacent edges of the guiding members at an intermediate point.

In the above mentioned drawing there has been shown but one embodiment of the invention which is now deemed preferable, but it is to 'be understood that changes and modifications may be` made Within the scope of the appended claims without departing from the spirit of the invention. y,

Briefly, and in its preferred aspect, the invention may include the Ifollowing principal parts: rst, a base plate adapted to be secured in position on the platform of a sewing machine adjacent the needle and presser foot; second, a pair one of which is se cured to the base plate at other of the guiding members being secured to the first, both members extending toward the needle of the -sewing machine and being twisted longitudinally so that fabric entering the space between the members at the larger ends of these members will be folded upon itself as it travels one end; third, the

longitudinally along and between the guiding members toward the needle; and fourth, a narrow loop connecting adjacent longitudinal edges of the guiding their length.

In the manufacture of cravats and other articles of textile material it is necessary to form neat finished edges. This is usually accomplished by folding the material adjacent its edge upon itself-and stitching the folds together with the raw or cut edge of the material concealed within the hem thus formed. To make the neatest possible edge the hem is made as narrow as possible and should be free from loose threads extending from the hem. When edges of material, particularly when cut on the bias, are to be hemmed there frequently are loose ends or threads of the fabric extending from the edge. These loose ends the conventional or standard hemming attachments are unable to completely fold within the hem so that they may be concealed. As a result therefore there frequently. are portions of these loose ends remaining in sight after the hem has been stitched in the usual manner. Such a hem to be entirely satisfactory must have these loose ends or threads cut by hand. By means of the small metal loop at an intermediate portion of members at a point intermediate the attachment where the raw or cut edge can contact therewith these loose ends are folded and concealed within the hem. The hem therefore is completely finished with the loose ends concealed when the seam along the hem has been I stitched and tedioushand labor to nish the hem is avoided;

Referring more in detail to the figures-of the drawing, there is shown at III the platform'of a standard form of sewing machine'having a presser fopt II mounted'on the lower end of presser bar I2 and a needle I3 fastened to needle bar I4. The above namedmembers and the feeding means I5 are or may be of any desired form and form no part of the present invention.

Secured in' fixed position on the platform Il is the base plate I6 of the hemming attachment which may have a screw passing through the platform I0 and be held in place by a nut I1 threaded thereon from below the platform. The opposite end of the base plate I6 preferably has a downwardly bent end portion I8 entering a recess within the platform Iii to more securely retain the base plate I6 in position. upper surface of the base plate I6 is secured, as by means of a suitable rivet' I9, one of the guiding or folding members 20 of the hemming attachment. 'I'his member is bent upward adjacent its rear end at which it is attached to the base plate and extends generally parallelly to and spaced from the base plate to a point adjacent the needle I3. Fastened to the first guiding member 2U at a point adjacent the rivet I9 is the second or companion-guiding member 2I. The portions of these members 20 and 2| adjacent the needle I3 are twisted together lengthwise and form between them a guideway extending toward the needle within which the edge of a fabric may be placed. Movement forward of the fabric by the feeding mechanism I5 will cause the material adjacent the edge to be folded over upon'itself as it approaches the needle so that its raw or cut edge may be concealed. The material is completely folded within the twisted guideway prior yto being stitchedin the usual manner. vIn addition to the members 20 and 2I there may be used a reinforcing member 22 extending around the rearward portions of Vthese members. This member 22 may be secured as by soldering or brazing to the outer surfaces of the folded portions of member 2I. 'I'he channel for the fabric being hemmed extends between the -lower surface of the u pper folded portion of member 2l and the upper surface of member 2li.

At an intermediate portion of member 2I there is provided a projection 23 preferably being formed as an integral part of the member 2|. This projection 23 is folded or bent upwardly upon itself to form a narrow loop the upper free end of the projection overlapping the lon-v gitudinal edge of member 20. This free end of the projection 23 may be secured in place as best shown in Fig. 3 by being soldered or brazed to the member 20. When bent into position as On the shown in the figures of the drawing the loop 23 is disposed at a point where the channel for the fabric has made substantially one-half a turn. This loop contacts the cut or raw edge of the fabric being hemmed and forces any loose ends extending from the fabric to be bent closely adjacent the fabric and be folded in and concealed by the further rolling or folding of the fabric as the hemmed fabric extends through the channel toward the needle. i

The loop 23 may be of any substantial width to engage and hold loose ends against the cut edge of a fabric as they pass along the guideway between the members 20 and 2I. Further folding of the hem between the ends of the guiding members 20 and 2I beyond the loop serves to force inwardly and conceal these loose ends. When the hem is stitched after being completely folded the raw edge with any loose ends extending therefrom is permanently enclosed' within the hem.

I claim as my invention:

1. A hemming attachment for sewing machines comprising in combination, a base plate, a pair of adjacent longitudinally twisted guiding members secured thereon, and a closed loop connecting adjacent longitudinal edges of said guiding members at an intermediate portion of their length.

2. A hemming attachment for sewing machines comprising in combination, abase plate, a pair of adjacent longitudinally twisted guiding members 'secured thereon, and a projection extending laterally from an intermediate portion of one of said 'guiding members and bent into contact with the other guiding member, whereby a closed loop is formed connecting adjacent longitudinal edgesof -said member at an intermediate point within which the edge of a fabric being hemmed may pass.

3. A hemming attachment for sewing machines vcomprising in combination, a base plate, a pair of adjacent longitudinally twisted guiding members secured thereon, and a closed loop formed integrally from one guiding member and bent to closely contact the other guiding member at an intermediate portion of their length and connecting longitudinal edges of said members.

4. A hemming attachment for sewing machines comprising in combination, a base plate, a pair of longitudinally twisted guiding members secured thereon and forming a continuously twisting channel through which the edge of a fabric being hemmed may pass, and a fixed closed loop disposed between and connecting adjacent longitudinal edges of said guiding members along one side of said channel at an intermediate portion of their length.

ELLEN J. SWANSON.

Images