US1988140A

US1988140A - Folding guide for sewing machines

Info

Publication number: US1988140A
Application number: US654975A
Authority: US
Inventors: Rudolph J Sailer
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1933-02-03
Filing date: 1933-02-03
Publication date: 1935-01-15
Anticipated expiration: 1952-01-15

Description

Jan. 15, 1935. R. JlSAlLER FOLDING GUIDE FOR SEWING MACHINES Filed Feb. 3, 1935 2 Sheets-Sheet 1 Hudalpfi J 45 056761 Jan. 15, 1935. R, J sAlLER FOLDING GUIDE FOR SEWING MACHINES 2 Sheets-Sheet 2 Filed Feb. 3, 1933 mmm W? 9 Patented Jan. 15, 1935 UNITED STATES PATENT GFFl-CE Singer Manufacturing Company,

Elizabeth,

N. J'., a corporation of New Jersey Application February 3, 1933, Serial No. 654,975

8 Claims.

This invention relates to folding guides for attachment to sewing machines and has for a particular object to provide an attachment for infolding the edges of two superposed plies of material and introducing therebetween, in advance of the sewing machine needle, a folded piping strip which is stitched inposition between the infolded edge-portions of the superposed plies by a line of stitches passing straight through all of the plies and folded portions thereof. Such a piped seam may be used as a mattress edgefinishing seam or for various purposes where a piped seam is-desired.

Another object of the invention is to provide a simplified and improved sewing machine guiding attachment which will guide and individually position the edges of a plurality of plies of material and permit of the independent adjustment of such edges laterally of the line of seam-formation; a further object of the invention being to provide for the ready removal of the attachment from and replacement in sewing position, without disturbance of the adjustments, so that the operator may instantly make use of the attachment or discard it at will, without interfering with its adjustments.

With the above and other objects in view, as

will hereinafter appear, the invention comprisesfolding attachment embodying the'invention and disposed in'workingposition on the bed of a sewing machine. Fig. 2 is a rear elevation of the attachment. Fig. 3 is a sectional view through a stitched seam produced by aid of the attachment. Fig. 4 is a top plan view of the attachment. Fig. 5 is a perspective view of the attachment as seen from a position directly in front of it. Fig. 6 is a r perspective view of the base-portion of the attachment, and Fig. '7 is a left side elevation of the attachment.

1 represents a base-plate which is fastened to the cloth-plate 2 of a sewing machine by screws 3 which pass through the slot 4 in the base-plate 1 permitting adjustment of the base-plate transversely of the line aa of seam-formation. The base-plate 1 is formed with a rearwardly and laterally extending tongue 5 which has an upturned lip 6 constituting an edge-guide disposed closely alongside the sewing machine p'resserfoot '7 and needle 8.

Pivotally mounted on the screw 9 threaded into the thickened end-portion 10 of' the baseplate 1 is a carrier-plate 11 having at one end a downturned lip 12 adapted to rest upon the sewing machine cloth-plate 2 and support the carrier-plate in parallelism with the base-plate 1. Disposed between the carrier-plate 11 and the head of the screw 9 is a dished spring washer 9 which frictionally and snugly holds the carrierplate in any position to which it may be swung about the screw 9 as a pivot.

Mounted in superposed relation on the carrierplate 11, by means of the screws 13, are the

slotted shanks

14, 15, 16 of a lower edge-folding scroll 17, an intermediate piping guide 18 and an upper edge-folding scroll 19, respectively. The slots in the

shanks

14, 15 and 16 extend transversely of the line a' a of seam-formation and permit of the individual adjustment and setting of the scrolls 1'7,v 19 and piping guide 18 relative to the line of seam-formation and relative to one another and to the edge-guide 6.

The lower and upper folding scrolls 17 and 19' have the respective Work-supporting platforms 1'7, 19'. The lower scroll 17 folds the edge-portion 20 of a lower ply 21 of material upwardly while the upper scroll 19 folds the edge-portion 22 of an upper ply 23 of material downwardly around the edge 19 of the platform 19'.

The intermediate piping guide 18 is preferably formed as a flattened tube extending'lengthwiseof'the line of seam-formation and inclined down wardly toward its delivery end. The'lower wall of the tube 18 is extended forwardly to form theupper wall of a lead-in tube 24 which extends at right angles to the tube 18 and is disposed in plane below the plane of the tube 18, asshown in Fig. 5. Such wall has anedge-portion 25 at to the longitudinal axes of the

tubes

18 and 24. The longitudinally folded piping strip 26 is delivered by the lead-in tube 24 to the inclined edge 25 around which the folded piping strip is drawn upwardly and inverted at right angles to the lead-in tube 24 into the guide-tube 18 which delivers it between the.

edge folds

20 and 22 to the sewing machine mechanism which forms the usual line of stitches 27. The inverting of both plies of the folded piping strip in the same direction and in contact relation around a single inclined edge 25 acts to crease or sharpen the fold and improve the appearance of the product.

There is preferably secured upon the carrierplate 11, by screws 28, the slotted shank 29 of a guiding tube 30 which receives the piping strip 26 in a flat condition and delivers it to the leadin tube 24 in a longitudinally folded condition, as will be readily understood.

The carrier-plate 11 with all the parts thereon may be instantly shifted about the screw 9 as a pivot between operative position (shown in full lines in Fig. 4) and an out of the way position (shown in dotted lines in the same figure) without disturbing any of the adjustments herein referred to.

The base-plate 1 is formed adjacent the edgeguide 6 with a stop-shoulder 31 which is engaged by the lip 12 to locate the carrier-plate 11 and parts carried thereby in correct operative position. In this position a downturned lip 32 on the plate 11 engages the thickened end-portion 10 of the base-plate remote from the edgeguide 6.

, The invention is not to be understood as limited to the described details of construction of the single embodiment of the invention illustrated, as it is obviously susceptible of embodiment in various specifically different forms within the spirit of the invention.

Having thus set forth the nature of the invention, what I claim herein is:-

1. The combination with an upper turn-down edge-folding guide and a lower turn-up edgefolding guide, of means intermediate said edgefolding guides for guiding a longitudinally folded piping strip, a supporting shank for each of said guides, said supporting shanks extending laterally away from theirrespective guides in the same direction, a base-plate, and means fastening said shanks in superposed relation to said base-plate.

2. In a sewing machine work-guiding attachment, the combination with a base-plate formed with an edge-guiding portion, of a carrier-plate superposed upon and pivotally connected with said base-plate, a plurality of work-guides mounted, in advance of said edge-guiding portion, upon and individually adjustable relative to said carrier-plate, said work-guides having work-engaging portions disposed one above another, and means for adjustably mounting said base-plate upon the cloth-plate of a sewing machine.

3. The combination with a base-plate adapted to be adjustably mounted on the cloth-plate of a sewing machine and having an edge-guiding wall, of a carrier-plate pivotally mounted on said base-plate for movement to inoperative position, upper and lower edge-folding guides adjustably mounted on said carrier-plate in advance of said edge-guiding wall, and a piping guide disposed between said edge-folding guides and in advance of said edge-guiding wall.

4. The combination with an upper turn-down edge-folding guide and a lower turn-up edgefolding guide, of means at one side of said guides for longitudinally folding a piping strip, and creasing means presenting an edge between and inclined to the direction of travel of the work through said edge-folding guides over which both plies of the longitudinally folded piping strip are drawn in contact with one another to position between the folded edge portions of material passing through said edge-folding guides.

5. The combination with a lower turn-up edgefolding guide and an upper turn-down edgefolding guide for superposed plies of material, of means at one side of said guides for longitudinally folding a piping strip and guiding it with its plies in contact relation in a direction transverse to the direction of travel of the material through said edge-folding guides, and means intermediate said edge-folding guides for creasing said longitudinally folded piping strip and directing it to position between the upper and lower plies of material.

6. The combination with a lower turn-up edgefolding guide and an upper turn-down edgefolding guide for superposed plies of material, of means at one side of said guides for longitudinally folding a piping strip and guiding it with its plies in contact relation in a direction transverse to the direction of travel of the material. through said edge-folding guides, and creasing means intermediate said edge-folding guides for inverting the contacting plies of said longitudinally folded piping strip and directing it to position between the upper and lower plies of material.

'7. The combination with superposed turndown and turn-up edge-folding scrolls each having a work-supporting platform extending laterally therefrom in one direction and a supporting shank extending laterally therefrom in the opposite direction, of a carrier-plate upon which shanks are mounted, and a base-plate upon which said carrier-plate is pivotally mounted, said base-plate having an edge-guiding wall rising therefrom in rear of said shanks.

8. The combination with an upper turn-down edge-folding guide and a lower turn-up edgefolding guide, of a piping guide disposed intermediate said edge folding guides and having a flat piping strip passageway therethrough and an inclined piping strip inverting edge at its receiving end disposed wholly at one side of the plane of said piping strip passageway, and means for longitudinally folding a piping strip and delivering it with its plies in contact relation to said inverting edge.

RUDOLPH J. SAILER.