US2772699A - Woven webs - Google Patents

Description

Dec. 4, 1956 T. M. scRUGGs 2,772,699

wovEN WEBS Filed Feb. l2, 1953 2 Sheetl-'Sheet l FIG,

De@ 4, 1956 T. M. scRUGGs 2,772,699

WOVEN WEBS Filed Feb. l2, 1953 2' Sheets-Sheet 2 -`9 FIG. 5. 9

United States Patent WOVEN WEBS Thomas M. Scruggs, Richmond Heights, Mo., assignor to Bemis Bro. Bag Company, St. Louis, Mo., a corporation of Missouri Application February 12, 1953, Serial No. 336,530

3 Claims. (Cl. 139-419) This invention relates to woven webs, and more particularly to such webs with reference lines.

Among the several objects of the invention may be noted the provision of a leno-woven open-mesh web such as is used for making open-mesh bags with a reference line for indicating the amount of material which is to be incorporated in a bag seam and for facilitating rapid inspection of finished bags to determine whether the seam has been properly made; and the provision of webs such as described which are economical to manufacture. Other object and features will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the structures hereinafter described, the scope of the invention being 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 of a portion of the length of a woven open-mesh bag web of my invention;

Fig. 2 is an enlarged fragment of Fig. 1;

Fig. 3 is an elevation of a bag made from the Fig. 1 web;

Fig. 4 is an enlarged fragmentary View illustrating the bag bottom seam; and,

Fig. 5 is a view similar to Fig. 2 showing a modification.

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

Referring to the drawings, Figs. l and 2 illustrate a woven open-mesh web of bag material, generally designated 1. A paper label strip 3 extends centrally of the web and is adhered to the web on one side, this being the outer side of the web as it is fashioned into bags. Under the labell strip, the web has a square weave as indicated by the reference character S, and the remainder (the visible portion of the woven material) is leno-woven as indicated by the reference character L. The filler strands of the web are designated 5. They are common to the concealed square weave portion S under the label strip and to the leno-woven visible portions L on both sides of the label strip. The single warp strands of the square Weave portion S under the label strip are designated 7, and the paired warp strands of the leno-woven portions L are designated 9. The web has a top selvage 11 and a bottom selvage 13, so-called because selvage 11 becomes the top of the bags made from the web, and selvage 13 becomes incorporated in the bottom seams of the bags. As herein shown, the web 1 is slit from a wider web and selvage 13 is a cut selvage edge. A drawstring 15 is incorporated in the web adjacent the top selvage 11. This is illustrated as a tape, but may be any other conventional type of drawstring so far as this invention is concerned.

The warp strands and filler strands are twisted paper strands. All the filler strands 5 and all the leno warp strands 9 are of the same color except for one strand 2,772,699 Patented Dec. 4, 1956 ICC 9a of a pair of leno strands adjacent the bottom selvage 13 which is of a distinctively contrasting color. For example, all strands 5 and 9 are dyed red, and strand 9a is dyed black. Or, all strands 5 and 9 are dyed purple and strand 9a isv an undyed strand. Usually, the warp strands 7 under the label strip are undyed, since they are not visible. The strand 9a establishes a readily distinguishable warpwise reference line extending continuously throughout the length of the web by reason of its distinctively contrasting appearance with respect to the remainder of the web. As shown,'the reference strand or line 9a is one of the second pair of leno strands from the bottom selvage 13, and indicates that -in making a bag seam, as will be described, theseam should be made to include at least all the material between the reference line and the selvage; or, alternatively, all but a designated amount of the material between the reference line and the selvage.

The web 1 is made into bags such as illustrated in Fig. 3 by cutting it into individual bag blanks along transverse lines spaced approximately twice the desired bag width. Each blank is folded in half on a transverse fold line with the label strip 3 on the outside. This brings together the cut transverse edges opposite the fold line and also brings together the half portions of the bottom selvage 13 with the adjacent reference line 9a. The bottom margin and the side margin of the folded blank opposite the fold line are then hunched and overstitched to form bag bottom and side seams 17 and 19, respectively, as shown in Figs. 3 and 4. As to the bottom seam, the operator is apprised by the reference line 9a as to the width of material to be incorporated in the seam to make it of adequate strength.

If the bottom seam is properly made, the reference line 9a will be substantially concealed within the seam (Fig. 4). If, however, an operator should fail to include enough material in the seam, the reference line 9a will lie away from the seam, and thus stand out upon inspection to indicate a defective seam.

It is contemplated that the web may be dyed after weaving, in which case the strands will be of such character that the reference line 9a will dye a different color from the remainder (or remain undyed) Fig. 5 illustrates a modification wherein the reference line is established by a leno warp strand 9b which, instead of being of a contrasting color, is of a contrasting larger size with respect to the remainder of the web.

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

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

I claim:

l. A leno-woven open-mesh web having paired warp and single filler strands, and a warpwise reference line adjacent one edge of the web extending continuously throughout the length of the web and established by having one warp strand of a pair adjacent said one edge of the web of a distinctively contrasting appearance with respect to the remainder of the web, each portion of said distinctive warp strand which lies between adjacent filler strands, in the unstressed condition of the web, being out of sidewise contact with adjacent portions of said distinctive warp strand, and said distinctive warp strand extending as a substantially straight line throughout the length of the web.

2. A leno-woven open-mesh web as set forth in cla-im 1 wherein `said one Warp strand is of a distinctively contrasting color with respect to the remainder of the web.

3. A Iene-Woven open-mesh web as set forth in claim 1 wherein said ene warp strand is of a distinctively contrasting size with respect to the other strands of the web.

References Cited in the le of this patent UNITED STATES PATENTS 361,360 Hunt Apr. 19, 1887 3, Mitchelson Ian. 13, 1903 Rosenstein June 2, 1931 Scruggs Jan. 2, 1934 Gwaltney Dec. 4, 1934 Randall Aug. 20, 1940 Pierce July 26, 194

FOREIGN PATENTS Great Britain of 1888

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