US2346637A

US2346637A - Sewing machine

Info

Publication number: US2346637A
Application number: US457155A
Authority: US
Inventors: George W Wesson
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1942-09-03
Filing date: 1942-09-03
Publication date: 1944-04-11
Anticipated expiration: 1961-04-11

Description

April 11, 1944-. I Q G. W. WESSON I SEWING MACHINE Filed Se t. 3, 1942 3 Sheets-Shet 1 Gemye la lieson .Ellatowm r l 11, 1944. G, w, WESSON I 4 2,346,637

SEWING MACHINE Filed Sept. 3, 1942 5 Sheets-Sheet 2 2a JQQ I 25 2 v 17L 375 :4 Z4 A.||||||||||I l||lllllllllll%m 4: 85 Z jet I Aprifl 11, 1944-. G, w S 2,346,637

SEWING MACHINE Filed Sept. :5, 1942 3 sheets-sheet s Patented Apr. 11, 1944 SEWING MACHINE George W. Wesson, Bridgeport, Conn, assignor to I The Singer Manufacturing Company, Elizabeth, N. J a corporation of New Jersey Applica ttion September 3, 1942, Serial No. 457,155

14 Claims.

This invention relates to sewing machines and has for its primary object to speed production in finishing the raw edges of articles, and more particularly pile-fabric articles such as rugs and the like having a woven fabric base.

Another object of the invention is to facilitate handling of the work in a first operation of attaching binding strips to the raw edges of articles.

The invention has also for an object to provide a' multiple-needle sewing machine with workguidin devices constructed and arranged to insure neat and secure binding of the raw edges of pile-fabric articles.

'With the above and other objects in' view as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a specific embodiment of the invention from which the advantages attained thereby will be readily understood by those.

skilled in the art.

Fig. l of the drawings is a front side sectional elevational View of the head end of a sewing machine embodying the invention.

Fig. 2 isan enlarged left end elevational View of a portion of the sewing machine shown in Fig. 1.

,Fig. 3 is a top plan view taken on the line 3-3 of Fig. 1.

Fig. 4 is a vertical sectional view taken substantially on the line 4-4 of Fig. 3.

Fig. 5 is a vertical sectional View taken substantially on the line 5-5 of Fig. 3.

Fig. 6 is a perspective view of a work presser forming part of the embodiment of the invention.

Fig. 7 is a perspective view of a work presser in inverted position to show the construction of the underpart thereof.

Fig. 8 is a perspective view, partly in section, of a rug edge with a binding strip as attached thereto by the machine of Figs. 1 to 7 inclusive.

Fig. 9 is a perspective view, partly in section, of the rug with a binding strip folded around the raw edge shown in Fig. 8 and lock-stitched to the back of the rug. I

Fig. 10 is a sectional view of the finished seam shown in Fig. 9.

Referring to the drawings the present invention is illustrated as embodied in a sewing machine comprising a work-supporting bed-plate l, an overhanging bracket-arm 2 terminating at its free end in a head 3 covered by a face-plate 4 detachably secured to said head by means of screw 5.

Journaled rotatably in the bracket-arm 2 is the main actuating shaft 6 of the machine, which carries at one end a crank-disc I connected by the link 8 with a vertically reciprocatory needlebar 9 journaled in the head 3. The needle-bar 9 carries at its lower end a pair of parallel needles l0 and H3 spaced from each other transversely of the line of feed of the work. Cooperating withboth of the needles I 0, 19 is a rotary shuttle ll disposed below the bed-plate I, said shuttle rotating in a vertical plane transverse to the line of feed and functioning to seize both of the threadloops presented by the two needles and to carry said thread-loops about a mass of under thread within a thread-case i2. Inasmuch as the stitchforming mechanism hereinabove referred to is well known in the art, detailed description thereof is deemed unessential to an understanding of the present invention.

Detachably secured to the usual spring-depressed presser-bar l3, by means of a screw I4, is a supporting shank 15 of a presser-foot which is yieldingly opposed to a feed-dog [6 operating through feed-slots in a throat-plate 1' to advance the work along the work-support. The presserfoct has adjacent tread-portions I1 and l'l which are laterally spaced to provide therebetween a work-clearance slot l5 which extends into the shank 15 of the presser-foot.

- of, is a vertical portion of a strip guide-tube 2| having an L-shaped strip passageway disposed to deliver the major widthwise portion of the strip in a vertical plane located between the two needles ill and ll] and into the slot l5 of the presser-foot.

Figs. 6 and 7 clearly show the structure ofthe work-presser and the manner in which the guide-tube 2| is secured thereto. A portion at the toe end N of presser-foot I1 is cut away to receive one end of the horizontal portion 22 of the guide-tube 2| said guide-tube being secured to said presser-foot by soldering, brazing or any similar suitable method and being disposed so that it is inclined downwardly from the entrance end 2 I to the delivery end 2 1 with,

2 the vertical portion disposed in an erect position between the portions I1 and I! of the workpresser l5, This inclined position of the guidetube provides for directing a relatively narrow edge portion 30 of the binding strip 30 beneath the presser-foot portion 11 just in advance of the needle aperture IB therein.

A pile-fabric article, comprising pile fibres 23 rising from one face of a woven base material 24 having a raw edge portion 25 is placed, pile face up, between the feed-dog l6 and the presserfoot unit l5, as seen best in Fig. 3. A conven-- tional edge-guide 26 is adjustably secured to the bed slide I by means of screw 21 and cooperates with a flanged roller-guide 28, journaled on a vertical pin 29 fixed to the bed plate I, to direct the pile-fabric article.

There is thus provided guide means for both the binding strip and the pile-fabric article, whereby only one of the needles penetrates both the binding strip and said article, to seam the two materials together in proximity to the raw edge of the article, while the other needle penetrates the pi1e-artic1e only, to provide a row of thread-loops more remote from the raw edge of the rug; the two rows of thread-loops thus formed being concatenated with the under or shuttle thread. It is evident that this binding operation requires that a line of stiching be formed in the pile of the article. It is obviously important that this line of stiching be formed without any marring of the pile-face and to this end the pile-spreading plow I9 is provided. This plow carries at its forward free end a prow portion SI, of which the point initially engages and divides the pile fibres at the bases thereof and cleanly separates them regardless of whether or not the pile is normal to the base material throughout the entire length of the pile. In this respect, the present plow l9 functions similarly to that shown and described in my prior U. S. Patent No. 2,298,665, Oct. 13, 1942.

It is evident from the above description that the pile-fabric article is fed through the machine flatly, straightly and with the pile face up and thus does not require special handling which would impede production. The journal-pin 29 may also serve as a guide for the binding-strip 30, to assist in directing said strip from a supply 3| to the entrance end of the strip-guide 2| as clearly shown in Fig. 3.

Fig. 8 illustrates the work after it has passed through the machine. The horizontal margin of the binding-strip 3B is attached to the raw edge margin of the article by stitches comprising the parallel rows of needle-

thread loops

32 and 33 connected by a shuttle-thread 34 passed through said needle-thread loops at the under .side of the article. After the binding strip 30 has been attached as shown in Fig. 8, it is folded about the stitches 32 and about the raw .edge of the article into engagement with the back of the article; being preferably secured to the back of the article by a series of lock stitches :35 as shown and described in my prior Patent .No. 2,298,665, hereinbefore referred to. Howeveig the strip-binding may be secured to the back of the article by whip-stitching, blind stitching or any other suitable or well-known means. In this manner the binding strip conceals and protects the raw edge of the article, as well as the stitches on the base and projects but little beyond the portion of the pile fibres 23 of $564 5" Having thus set forth the nature of the invention, what I claim herein is:

1. In a sewing machine for attaching a strip to a pile-fabric article, in combination, work-deeding mechanism, stitch-forming mechanism including two reciprocatory needles spaced from each other transversely of the direction of work feed and a loop-taker complemental to both of said needles, means for guiding a binding strip between the two needles with one of its longitudinal margins superimposed upon said pile-fabric within the stitching zone of one of said needles and with the other of its longitudinal margins disposed outside the stitching zones, and means for forming a furrow in said pile in the line of seam formation of the other one of said needles.

2. A pile-fabric sewing machine having a worksupport, stitch-forming mechanism including two reciprocatory needles disposed in spaced apart relation transversely of the lines of seam formation, means for reciprocating'said needles, workfeeding mechanism, a presser-foot including a foot portion provided with a needle-aperture, said presser-foot having a second foot-portion there of spaced laterally from said firstfoot-portion and having a pile-spreading'plow provided 'with a needle aperture, and a binding-strip guide carried by one foot-portion of said presser-foot to extend vertically between said needles, said guide being formed to direct one longitudinal margin of a binding-strip within the stitching zone of one needle and to direct the opposite margin of said strip outside the stitching zones of both needles.

3. A sewing machine having a work-support, work-feeding mechanism, stitch-forming mechanism including two endwise reciprocatory needles disposed in spaced-apart relation transversely of the direction of feed, a presser-foot unit including a first foot-portion having a needle-aperture therein and a second foot-portion spaced laterally from said first foot-portion and provided at its lower side with. a pile-spreading plow lengthwise extending in the line of seam formation of one of said needles, said plow having between its ends a needle aperture, a binding-strip guide-tube disposed on said presser-foot unit to extend vertically upwardly between said two needles and formed to direct one longitudinal margin of a binding strip into and the other longitudinal margin outside the stitching zone.

4. In a sewing ,machine, in combination, a work-support, means for advancing a body material along said work-support, stitch-forming mechanism including a pair of endwise reciprocatory and substantially parallel needles spaced from each other transversely of the direction of feed of the work, means for guiding a margin of said body material into the stitching zones of both of said needles and with an edge of said body material disposed adjacent one ofsaid needles,

means for guiding a longitudinal margin of a;

strip into face contact with said body material within the stitching zone of one only of said I needles and with the edge of said margin disposed at the same side of said needle as said body ma-f teria1 edge, and means for directing the :other longitudinal margin of said strip. ,betweenythe paths of needle reciprocation in a planesubieach other transversely of the direction of feed for forming parallel rows of thread-loops in said article, means for guiding said article into the stitching zones of both of said needles and With an edge of said article disposed adjacent one of said needles, means for guiding a binding strip into the stitching zone of the needle which is disposed adjacent said edge of the pile-fabric article, means for forming a stitch-receiving fur.- row in the line of seam-formation of the needle more remote from said edge of the pile-fabric article, and means for anchoring together said rows of thread-loops.

6. In a sewing machine for attaching a binding strip to the margin of a pile-fabric article, in combination, a work-support, work-feeding mechannism for advancing the pile-fabric article across said Work-support, a pair of needles spaced from each other transversely of the direction of feed for forming parallel rows of thread-loops in said article, a loop-taker complemental to both of said needles for anchoring together said rows of thread-loops, means for guiding said article into the stitching zones of both of said needles and with an edge of said article disposed adjacent one of said needles, means for guiding a longitudinal edge of a binding strip between said needles and for guiding the opposite margin of said strip into the stitching zone of the needle which is disposed adjacent said edge of the pile-fabric article, and means for forming a stitch-receiving furrow in the line of scam formation of the needle more remote from said edge of the pile-fabric article.

7. In a sewing machine for attaching a strip to a pile-fabric article, in combination, a worksupport, a work-feeding means for advancing the pile-fabric article across said work-support, stitch-forming mechanism including two needles spaced from each other transversely of the direction of feed, means for guiding a strip of material into the stitching zone of one of said needles, and means for forming a pile-furrow in said article in the line of stitch-formation of the other of said needles.

8. In a sewing machine for attaching a strip to a pile-fabric article, in combination, a horizontally disposed work-support, work-feeding means for advancing across said work-support a pile-fabric article placed pile-face upwards upon the work-support, stitch-forming mechanism including two needles spaced from each other transversely of the direction of feed, means for guiding a strip of material into the stitching zone of one of said needles, and means disposed above said work-support for forming a furrow in the pile of said article in the line of stitch-formation of the other of said needles.

9. In a sewing machine, in combination, workfeeding means, stitch-forming mechanism including a pair of needles spaced from each other transversely of the direction of feed of the work,

means for guiding a strip into the stitching zone of one only of said needles, and a pile-dividing plow lengthwise extending in the line of seam formation of the other of said needles.

10. In a sewing machine, in combination, workfeeding means, stitch-forming mechanism including a pair of needles spaced from each other transversely of the direction of feed of the work, means for guiding a strip widthwise bent into substantially L-shape between the needles with the offset portion of the strip extending into the stitching zone of one of the needles, and a pile-dividing plow lengthwise extending in the line of seam formation of the other of said needles.

11. A sewing machine presser-foot having laterally spaced tread portions providing therebetween a work-clearance slot; one of said treadportions having a depending pile-dividing plow containing a needle-aperture; and a second one of said tread-portions having a needle-aperture and carrying a strip guide providing L-shaped strip-bending members; one of said members being disposed in substantial alinement with said slot and the other of said members being disposed in advance of the needle-aperture of said second thread-portion.

12. A sewing machine presser-foot including adjacent laterally spaced tread-portions each having a needle-aperture and together providing therebetween a work-clearance slot; a piledividing plow depending from one of said treadportions and containing one of said needle-apertures, said plow having the lower edge thereof disposed in substantially the plane containing the under face of the adjacent tread-portion; and an L-shaped strip-guide carried by said adjacent tread-portion, said strip-guide including a member extending into said slot and a second member having the delivery end thereof disposed at the under side of the adjacent tread-portion in advance of the needle-aperture thereof.

13. A sewing machine presser-foot having adjacent tread portions separated by a work-clearance slot, said tread portions being each provided with a needle-aperture and having their lower faces disposed at substantially the same level, and one of said tread-portions comprising a pile-dividing plow having upwardly divergent side faces and a pointed forward end.

14. A sewing machine presser-foot having ad- =jacent tread portions separated by a work-clearance slot, said tread-portions being each provided with a needle-aperture and having their lower faces disposed at substantially the same level, one of said tread-portions comprising a piledividing plow having a pointed forward end, and the other of said tread-portions carrying a stripguide having a guiding portion thereof disposed in alinement with said slot.

GEORGE W. WESSON.