US2174790A

US2174790A - Sewing machine

Info

Publication number: US2174790A
Authority: US
Publication date: 1939-10-03
Anticipated expiration: 1956-10-03

Description

Fatented Oct. 3 1939 artisan SEWING MACHINE Oscar E. ta,

City. Mo.

Application February 15, 1937. Serial No. 125,782

This invention relates to clothing manufacture and has for its object to produce anew method of and apparatus for the insertion of patch reinforcements to receive buttons and the like. such reinforcements being placed under hems and between facing strips and the like, to resist strain and keep the buttons from pulling out. These reinforcements are especially desirable on overall bibs to receive the buttons to which the shoulder straps' are detachably secured because of the heavy load frequently imposed at this point.

A further object of the invention is to produce a device which -I have called a "poker bar" for inserting such patches. For convenience of 11- lustration I show the patches as being inserted between the hemmed or folded edge of an overall bib and its facing strip sewed to the reverse or inner face of the bib. l With the objects named in view, and others as will hereinafter appear, the invention consists in certain noyel methods and in the production of a device having a new arrangement or combination of parts as hereinafter particularly described and claimed; and in order that the in- 5 vention may be fully understood, reference is to be had to the accompanying draw ng, in which- Figure 1 is a perspective view of the top of a 2-needle sewing machine, indicating the relative positions of the two needles, an overall bib and cc facing strip, with the device of the invention in the position it occupies when ready to feed a reinforcing patch.

' Figure 2 is a longitudinal section through the device showing the patch folded in the position w it occupies just prior to insertion between the bib and the facing strip.

Figure 3 is an enlarged section similar to Figure 2, but with the patch inserted and the poker bar ready for withdrawal. an Figure 4 is a cross section through the-top edge of a bib, its patch button reinforcement and button.

Figure 5 is a top edge view of the corner of an overail bib, as shown in Figure 4.

Figure 6 is a rear plan view of the inner side of the corner of the bib as it willappear when completed with the side edge turned back and stitched down.

Figure 7 is a perspective view of a slightly mod- 51: ified form of patch inserting mechanism.

In the said drawing, where like reference characters identify corresponding parts in all of the figures, in the usual operation of producing a faced edge, as along the top of an overall bib,.i

' gg represents the overall bib and 2 the facing strip sewed to its reverse or as shown in Figure 1, the bib i passing through the top folder having a scroll 3 which turns the top edge of the bib as at 4, and the bottom folder 5 turning both edges 6 of the facing strip, such devices being spaced slightly in advance of the needles I. In the placing of the reinforcement patches, it has heretofore been common practice to stop the machine at the desired point, fold back the material. and then manually tuck in or place the patch under the hem- I have found, however, that by setting the folders an inch or so in front of the needles, it is possible to insert'or "poke" a patch reinforcement between the bib and the facing strip, since the pressure of the folders and that of the presser foot (not shown) or feeding mechanism (not shown), of the sewing machine. holds the turned edges down so that the insertion may be made in the manner indicated. The insertion may be made, if desired, by manipulation of a thin strip of metal, celluloid or the like.

In actual coommercial production, however, it has been found desirable to speed up the operation and make it positive; and to this end, I have produced what I term a "poker bar, as illustrated in'the accompanying drawing. I have, for convenience, in the main figures of the drawing, illustrated the device as a separate structure from the sewing machine itself, although as will hereinafter apr, it is to be understood that the poker bar might be mounted to slide directly on the table of the sewing machine or the machine may be provided with such table as shown in Figure 7. In the wing 8 indicates a base plate having a channel to receive a reciprocatory poker bar ii, said plate having a stop lug it projecting upwardly into a longitudinal channel or slot ii in the underside of the sliding bar 9 to constitute a stop to limit the movement of the sliding bar in both directions so that a patch may not be inserted beyond a predetermined distance, and to prevent disengagement of the bar from the base on its return or withdrawal movement.

The poker bars may be held down in position in any suitable manner as by forming the base with an overlying flange I! at one edge of the bar, the other edge of said bar underlying the overhanging edge of a removable cover plate it carried by a thickened part of the plate 8. The

inner side. Ordinarily these parts are fed to a. 2-needle sewing machine front end of the poker bar is of reduced thickness to space it from the plate to'accommodate the maximum thickness of material to be J. KRUTTSCHNITT DRILL BIT Filed Nov. 8, 1937 INVENTORT KL niumfiizr 73%, Bra- A TTORNEYS.