US3763801A

US3763801A - Sewing machine foot cording device

Info

Publication number: US3763801A
Application number: US00217860A
Authority: US
Inventors: A Bozzi
Original assignee: TRAUM D Inc
Current assignee: TRAUM D Inc
Priority date: 1972-01-14
Filing date: 1972-01-14
Publication date: 1973-10-09
Anticipated expiration: 1990-10-09

Abstract

A detachable foot-mounted fabric strip folding and cording structure of compact design, efficiently impartable of a fold to a fabric and feedable of a cord into the vertex of the fold and shaped to maintain the fold and to avoid wrinkles and nonalignment while concurrently directing the folded corded fabric precisely to a needle-sewing point under receiving upwardly turned toes of forks of the foot on which the cording structure is mounted.

Description

United States Patent [191 Bozzi [451 Oct. 9, 1973 SEWING MACHINE FOOT CORDING DEVICE Inventor: Ann R. Bozzi, c/o David Traum Inc.,

85 Tenth Ave., Franklin Square, NY.

Filed: Jan. 14, 1972 Appl. No.: 217,860

U.S. Cl. 112/139, 112/151 Int. Cl. D05b 35/00, D05c 7/08 Field of Search 112/139, 137, 147, 112/150-153, 136, 235, 240, 121.19, 121.27; 12/151 References Cited UNITED STATES PATENTS 3/1904 Kiesewetter et a]. 112/151 3/1908 Fose 112/151 4/1952 Mclntyre 112/139 11/1925 Cunningham 112/139 X 1l/l925 2,737,914 3/1956 Hofgesang 112/240 3,489,114 l/1970 Seck 112/240 FOREIGN PATENTS OR APPLICATIONS 145,196 1/1950 Australia 112/152 17,875 7/1897 Great Britain 112/139 Primary Examiner-Jordan Franklin Assistant ExaminerWil1iam L. Falk Attorney-William T. Hough et a1.

[5 7] ABSTRACT 2 Claims, 5 Drawing Figures SEWING MACHINE FOOT CORDING DEVICE This invention relates to a sewing machine structure for the cording of fabric strips. I

BACKGROUND TO THE INVENTION Prior to this invention there have been various types of cording devices of varying shapes and structures, and most if not all of such cording devices have been mounted on the bed plate'or table of the sewing machine. Some of these cording devices are shaped in order to automatically impart a fold to the fabric and to feed a cord into the fold, while others are not designed to automatically bring about the folding but are structured merely to hopefully retain the fold as an operator feeds the folded and corded material into a sewing machine to be sewn along the folded portion adjacent the cord. Such a latter type deviceis illustrated in U.S. Pat. No. 859,188. Cording devices of the other type which are intended to facilitate the imparting of a fold include typically patents such as U.S. Pat. No. 2,839,018, U.S. Pat. No. 1,560,219, U.S. Pat. No. 2,593,589, and U.S. Pat. No. 2,846,964. Among the problems associated with one or more of these prior structures is the mounting thereof on the bed plate by structure which inherently gets in the way of the operator as well as usually requiring complicated or special adapting modifications of the sewing machine bed plate in order to utilize any one or more of such structures, the imperfect folding accomplished by the use of such structures as wellas the less than consistent alignment of the cord as well as the occurring of wrinkles in the fabric, the non-alignment of the folder with the sewing machine foot and needle, and/or the inadvertentjarring or striking of the folding and cording guide such that the fabric is fed in non-alignment, to the sewing machine foot and needle, and the like. The result of many of these complications is that the cording devices which were intended to facilitate the work of the operator and to enhance efficiency and improve th work product and performance of the operator ultimately often have resulted in just the opposite because of the great care and attention required of the operator as well as the problems that occur irrespective of the great care.

SUMMARY OF THE INVENTION Accordingly, an object of this invention is to overcome one or more of the problems of the type discussed above.

Another object is to obtain a fabric-strip folding and cording device which by its structure inherently assures fabric and cording alignment with the sewing machine foot and sewing needle thereof.

Another object is a sewing machine fabric cording structure shaped to automatically fold fabric strips and to feed the cord into-the vertex of the fold in a manner avoiding wrinkles, non-alignment alignment, and the like.

Other objects become apparent from the preceding and following disclosure.

One or more of the preceding objects are obtained by the invention as defined hereafter.

Broadly the invention includes a sewing machine'foot-fabric-cording structure of simple and compact structure with the mounting connection between the foot and the cording structure being small, sturdy, and out of the way of an operator, providing a free and clear sewing machine bed plate for free movement of the operator, the fabric, andthe like, while the cording structure itself is shaped such as to gradually impart a fold to a fabric strip while simultaneously being feedable of a cord into the vertex of the fold, and the structure maintaining the fold, providing enlarged cross sectional space at the pointof the vertex of the folded fabric at which the cord located, and precisely feedable of the corded fabric and upturned toes of the fork of the foot on which the cording structure is mounted, allowing for no slippage of the cording device relative to the foot fork and toes and the needle sewing point. Preferably the foot is of a type easily mountable and dismountable from the sewing machine, i.e., an attachable and detachable foot structure. More particularly, the structure includes a sewing machine foot having a fork with slightly upturned toes receivable thereunder of folded and corded fabric directable at a predetermined needle-point, with a connecting shaft extending from the foot preferably in an arc shape and having mounted on the far end thereof the folding structure and the cording structure, with the folding structure at a forward portion being flared uprightly and progressively becoming concave in shape asit extends rearwardly toward the foot, with a funnel structurebeing mounted between upper and lower edgesof theconcave structure and the funnel structure being feedable of a cord into a channel at about the vertex of'the concave fabric-folding structure with the channel in.a rearward direction becoming progressively circular in cross-section adjacent the vertex with substantially flat upper and lower walls extending about horizontally later'ally. The rearward most portion of the folding structure is fixedly held in a predetermined relationship with respect to the outwardly turned toes of the fork of the sewing machine foot on which the folding and cording structure is fixedly and preferably permanently mounted. It is by virtue of the permanent, fixed -structure existing'between the foot and the folding and cording structure that non-alignment and consistent precision stitching of the corded fabric is obtainable. The invention may be better understood by reference to the following figures.

THE FIGURES FIG. I illustrates a perspective in-part side view of the sewing machine foot-fabric folding and cording device, together with a fabric to be folded and being folded fed through the device and beneath the foot.

FIG. 2 illustrates a view taken along lines 2-2 of FIG. 1.

FIG. 3 illustrates a view taken along lines 3-3 of FIG. 1.

FIG. 4 illustrates a view taken along lines 4-4 of FIG. 1.

FIG. 5 illustrates a view taken along lines 55 of FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION a shaft 14 extending from and supportable of a fabric strip folding and cording device 15 having a flared fabric receiving end 16, a fold-imparting pressure element 17, a cord receiving and feeding cylinder 18, a rounded enlarged channel, and a folded and corded-fabric flattening and guide structure 200 and b directing the fabric 7 in the folded condition 7a beneath the toes ll comprising toes lla and llb, and beneath the aperture 9 and the downwardly facing flattened foot-face 12a, holding the sewn corded fabric strip in its sliding position on top of a platen structure 21.

FIG. 2 illustrates in an elevation plan view taken along lines 22 of FIG. 1 the same elements described for FIG. 1.

FIG. 3, FIG. 4, and FIG. 5 illustrate the specific shapes of the previously enumerated parts along respectively lines 33, 44, and 5-5.

Cord 22 is illustrated asbeing fed into the cording receptacle 18.

It should be noted that in the illustrated combination of this invention, the lock screw 23 by loosening and tightening respectively permits the placing of varying angles of the direction of feed of the folded and corded fabric beneath the flanges 11, as well as allowing the folding and cording device to be flipped up out of position and/or totally removed during such periods as it is desirable to have it out of position to permit the operator greater freedom of movement and maneuvering.

It is within the scope of the invention to make modifications and substitutions of equivalent parts as would be apparent to a person of ordinary skill in this art.

I claim:

1. A sewing machine cording device comprising in combination: a detachably mountable sewing machine foot means having a foot with forwardly extending and upwardly turned forks and with an upright shank, an upward projection extending rearwardly from said foot with said projection being located rearwardly from said upright shank in the line of the direction of the feed of the work; and including adjustable mounting means located at an upper portion of the projection, a shaft having distal and proximal ends .with the proximal end being secured by said mounting means on said projection at said upper portion, means providing pivotable adjustment of said proximal end of said shaft in the pro- 5 jection mounting means to adjust the distal end of said shaft, said shaft extending from the proximal end substantially horizontally, circumscribably around and forwardly of said shank, a fabric cording means, means rigidly mounting said fabric cording means from the distal end of said shaft, said fabric cording means comprising a fabric strip edge-folding structure and a funnel structure having an inlet to forwardly receive a cord, said fabric strip edge-folding structure including a laterally upwardly flared upright first surface progressively becoming a first concave-shaped tapered surface in a rearward direction toward the foot, a second concave-shaped surface cut within and sectionally spaced from said first concave-shaped surface, the first concave-shaped surface being joined at upper and lower edges to said second concave-shaped surface, said second concave-shaped surface terminating anterior to the inlet of said funnel structure, said fabric cording means also including a channel extending lengthwise of said cording means and forming a narrowed flat-like threesided passage formed by said first concave-shaped surface at the exit opening of said funnel structure, said narrowed three-sided passage including an enlarged arcuate cross-sectional area being formed by a rounded side wall merging into a pair of opposed horizontally extending lateral walls spaced from each other and said enlarged arcuate cross-sectional area being directed toward, beneath and adjacent to the upturned forks of said foot.

2. The sewing machine cording device of claim 1, in which the rearward projection mounting means includes aperture means slidably receiving said proximal end, said proximal end being laterally slidable and horizontally movable such that the fabric cording means is thereby laterally adjustable relative to the forward forks.

Claims

1. A sewing machine cording device comprising in combination: a detachably mountable sewing machine foot means having a foot with forwardly extending and upwardly turned forks and with an upright shank, an upward projection extending rearwardly from said foot with said projection being located rearwardly from said upright shank in the line of the direction of the feed of the work; and including adjustable mounting means located at an upper portion of the projection, a shaft having distal and proximal ends with the proximal end being secured by said mounting means on said projection at said upper portion, means providing pivotable adjustment of said proximal end of said shaft in the projection mounting means to adjust the distal end of said shaft, said shaft extending from the proximal end substantially horizontally, circumscribably around and forwardly of said shank, a fabric cording means, means rigidly mounting said fabric cording means from the distal end of said shaft, said fabric cording means comprising a fabric strip edge-folding structure and a funnel structure having an inlet to forwardly receive a cord, said fabric strip edge-folding structure including a laterally upwardly flared upright first surface progressively becoming a first concave-shaped tapered surface in a rearward direction toward the foot, a second concave-shaped surface cut within and sectionally spaced from said first concave-shaped surface, the first concave-shaped surface being joined at upper and lower edges to said second concave-shaped surface, said second concaveshaped surface terminating anterior to the inlet of said funnel structure, said fabric cording means also including a channel extending lengthwise of said cording means and forming a narrowed flat-like three-sided passage formed by said first concave-shaped surface at the exit opening of said funnel structure, said narrowed three-sided passage including an enlarged arcuate crosssectional area being formed by a rounded side wall merging into a pair of opposed horizontally extending lateral walls spaced from each other and said enlarged arcuate cross-sectional area being directed toward, beneath and adjacent to the upturned forks of said foot.