US2461240A

US2461240A - Open-mesh fabric selvage

Info

Publication number: US2461240A
Application number: US672118A
Authority: US
Inventors: Thomas M Scruggs
Original assignee: Bemis Brothers Bag Co
Current assignee: Bemis Brothers Bag Co
Priority date: 1946-05-24
Filing date: 1946-05-24
Publication date: 1949-02-08
Anticipated expiration: 1966-02-08

Description

Feb; 8, 1949. T. M. SCRUGGS I 2,461,240

OPEN-MESH FABRIC SELVAGE Filed May 24, 1946 2 Sheets-Sheet l 8 I N L 5 LEA/0 5 WARP T. M. SCRUGGS OPEN-MESH FABRIC SELVAGE Feb. 8, 1949.

Filed May 24, 1946 2 Sheets-Sheet 2 FIGS.

Patented Feb. 8, 1949 OPEN-MESH FABRIC SELVAGE Thomas M. Scruggs, Richmond Heights, Mo., as-

signor to Bemis Bro. Bag Company, St. Louis, Mo., a corporation of Missouri Application May 24,1946, Serial No. 672,118

3 Claims.

This invention relates to open-mesh fabric selvage and, more particularly, to selvage for a severed edge of open-mesh fabric bag material, and relates also to methods of forming such selvage.

Among the several objects of the invention may be noted the provision of open-mesh fabric having an improved selvage on a severed edge thereof which effectively prevents unraveling of the fabric; the provision of such fabric having a selvage of this class which stifiens the severed edge; the provision of a fabric having such selvage which does not include any strand material other than that of the fabric itself; and the provision of methods comprising relatively few and simple steps for forming such selvage on a severed edge of open-mesh fabric. Other objects will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, steps and sequence of steps, features of construction and manipulation, and arrangements of parts which will be exemplified in the structures and methods hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which several of various possible embodiments of the invention are illustrated,

Fig. 1 is a plan view illustrating a web of openmesh fabric which has been partially split or severed on its longitudinal center line;

Fig. 2 is an enlarged plan view of one side of the fabric illustrating a severed edge thereof and a selvage being formed along said edge;

Fig. 3 is an enlarged transverse section, taken on line 33 of Figs. 2 and 4, illustrating the finished selvage;

Fig. 4 is a partial plan view of the fabric illustrating the selvage but viewed from the side opposite that shown in Fig. 2;

Fig. 5 is a plan view illustrating a modification, showing an open-mesh fabric being split or severed and a selvage being formed along the severed edges; and,

Fig. 6 is an enlarged transverse section, taken on line 6-6 of Fig. 5, illustrating the finished modified selvage.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring now to the drawings, Fig. 1 illustrates a web of open-mesh fabric (bag material, for example) being severed on its longitudinal center line to divide the web into two strips. As shown in Fig. 2, the main body of the fabric is of conventional open leno weave having longitudinally spaced transverse filler strands 3 and transversely spaced longitudinal double warp strands 5. The warp strands are paired and twisted so as to cross between the filler strands. This substantially prevents relative sliding of the warp and filler strands and maintains the open-mesh form. Herein this is called a leno weave. The web at its outer edges has woven-in strings 8 which function as draw cords in bags made up from the material after it has been treated as herein described.

The web I is severed substantially along its longitudinal center line parallel to the warp strands by cutting through all the filler strands between the two warp strands l immediately ad- J'acent the center line on opposite sides thereof. This leaves ends 9 of the filler strands projecting from the severed marginal edge of the web. Since the warp strands may unravel by sliding off the severed ends of the filler strands, it is desirable to provide a selvage to prevent such unraveling.

To form the selvage, the warp strand 1 is pushed transversely inward on the filler strands into engagement with the next adjacent warp strand II. This increases the projecting lengths of the filler strand ends 9. These ends are then bent over and laid against one side of the em gaged warp strands l and II (as indicated at It) and secured thereto by a coating l5 of suitable adhesive (Fig. 3)' extending the length of the edge of the fabric. A suitable adhesive for this purpose comprises nitrated cellulose in a volatile between the projecting filler strand ends and the.

fabric. The web I I in this modification is of open leno weave comprising spaced transverse filler strands l9 and spaced warp strands 2 l. The warp strands are uniformly spacedthroughout the web except in zones paralleling the longitudinal center line on opposite sides thereof. In each of these zones, an additional double warp strand 23 is woven into the fabric. As illustrated in Fig. 5, the warp strands immediately adjacent the center line are designated 25 and the next warp strands outward therefrom are designated 21. Each warp strand 23 lies between a strand 2! and what would normally be the next warp strand in conventional open-mesh fabric. Thus,

strands

23 and 21 are spaced approximately only half the distance of the ordinary warp strand spacing.

The web i1 is severed by cutting through all the filler strands 19 between warp strands 25. This leaves ends 29 of the filler strands projecting from the edges of the two pieces of fabric. To form a selvage for a severed edge,the respective warp strand 25 is slid transversely inward on the filler strands until it engages the adjacent warp strand 21. This increases the projecting length of the filler strand ends 29. These ends are bent or looped over and tucked into the space between

warp strands

23 and 21, as indicated at 3|, and secured in such position by a coating 33 of an adhesive such as above described. The adhesive is'not absolutely essential in this form, and may be omitted if so desired. Its use, however, is preferable.

The close spacing of the

warp strands

23 and 21 is such as to retain the ends of the filler strands tucked in the fabric prior to application of the adhesive. The looped filler strand ends also interlock with the fabric and aid in preventing unraveling thereof. The group of warp strands on the edge of the fabric, comprising engaged

strands

25 and 21, and the adhesive stiffen the selvage.

The intermediate product in both forms of the invention is a pair of webs, each having a draw string 8 at one edge and the new selvage at the other edge. Each web may then be cut transversely into lengths indicated, for example, at N in Fig. 1, and then folded along a line such as shown at L. This will bring together the lines T. The resulting folded fabric may then be seamed along the adjacent lines T and along a line within the selvage formed by the present invention. This will form an open bag having at its mouth a draw string 8. Further details of how bags may thus be made up from open-mesh fabric will be found in the United States patent to Brady 2,392,221; also Allen Reissue 18,905 and 1,941,509. In view of the above, it will be seen that the present invention provides for conveniently making a salvage, in this case a bottom-forming selvage for bags.

The present invention also allows for conveniently splitting a wide web (such as shown in Fig. 1) into two webs and in a simple manner treating the resulting raw edges to form selvages which will not unravel and which may be used for bottom seams of bags'without having free strands extending from the seams. It is to be understood that the separated and selvaged webs may also be cut in directions such that the salvage result ing from the present invention lies in a side seam or even at the'bag mouth.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in the above methods and constructions without departing from the scope of the invention, it is intended that all matter contained in the above deseriptlon or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. An open-mesh fabric comprising spaced warp strands and spaced filler strands, each filler strand having a free end at a marginal edge of said fabric, said edge having a group of engaged warp strands extending the length thereof, the free end of each filler strand being bent over longitudinally with respect to said edge and disposed against one side of said group of warp strands and adhesively secured thereto.

2.,An open-mesh leno weave fabric comprising spaced double warp strands and spaced filler strands, each filler strand having a free end at a marginal edge of said fabric, said edge having a group of two engaged warp strands extending the length thereof, the free end of each filter strand being bent over longitudinally with respect to said edge and disposed against one side of said group of warp strands, and a coating of adhesive extending the length of said edge and securing said free ends to said group of warp strands.

3. An open-mesh leno weave fabric comprising spaced double warp strands and spaced filler strands, each filler strand having a free end at a marginal edge of said fabric, said edge having a group of two engaged warp strands extending the length thereof, the free end of each filler strand being bent over longitudinally with respect to said edge and disposed against one side of said group of warp strands, and a coating of adhesive extending the length of said edge and securing; said free ends to said group of warp strands, and securing together the members of said groups of warp strands.

THOMAS M. SCRUGGS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 573,715 Simpson Dec. 22, 1896 1,426,351 Brooks Aug. 22, 1922 1,682,198 Sitton Aug. 29, 1928 1,749,734 Kelly Mar. 4, 1930 1,798,630 Miller Feb. 24, 1931 2,319,019 Van Court May 11, 1943