US2226093A - Method of weaving ladder web and packaging the same - Google Patents

Description

Dec. 24, 1940. e. E. COLBY 2,226,093

METHOD OF WEAVING LADDER WEB AND PACKAGING THE SAME Filed Aug. 30, 1939 6 to 58% "a ,3

INVENTOR.

ea/y'e Efoffy B'Yfl g A TTORNEYS.

Patented Dec. 24, 1940 METHOD OF WEAVING LADDER WEB AND PACKAGING THE SAME I George E. Colby, East Providence, It. I.,-assignor to International Braid Company, a corporation of Massachusetts Application August 30, 1939, Serial No. 292,685

3 Claims.

This invention relates to a ladder web construction where the exterior faces of the two main webs diner in color characteristics, the webs being connected together by cross members, and this invention has for one of its objects an arrangement of the main webs so that the slats carried by the cross members may be satisfactorily closed when the ladder construction is utilized in a Venetian blind.

Another object of the invention is to provide a ladder web construction having webs of different colors. one of which colors is a light color to be placed on the outer side of .the Venetian blind and the other web of which is a darker color designed to be placed on the inner surface of the Venetian blind for the harmonizing in different room color schemes, with an arrangement between these two main webs so that they will be substantially equal in length or if any variation occurs this variation will be such as to provide the lighter colored tape longer in length to provide proper closing of the blind by tilting of the slats thereof. I

Another object of the invention is to arrange for this proper length characteristic of the main webs by the packaging of the ladder construction in a form so that the lighter colored web will be on the outside of the package or roll azfd thus will maintain a greater radius for any angle of are and thus a greater length than its companion web of darker color.

Another object of the invention is to arrange for the proper length characteristic of the main webs both by the tension or take-up of the warps :,in the main webs and the packaging of the'ladder web construction as it is taken from the loom.

' With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a side elevation of a ladder web construction supporting the cross slats of a Venetian blind;

Fig. 2 illustrates this blind in partially closed position;

Fig. 3 illustrates schematically the weave arrangement of the ladder construction;

Fig. 4 illustrates diagrammatically the travel of the warps in the loom and the rolling of the same; and

Fig. 5 illustrates a package of woven ladder construction.

In the hanging of Venetian blinds where ladderweb having two main webs of different color characteristics is used, difliculty is often experienced because the workman hanging the blind does not have the optio nto shift the ladder web from side to side or end to end as where the main webs are both of thesame color characteristics as he must for proper hanging place the light colored web on the outside of the blind and the dark colored main web on the inside of the blind for color matching of the room, and if the main webs are not of the same length or the dark web is longer, the blind will not properly close. At the present time it will be noted on the market that it is the custom to package ladder web construe tion in rolls with the. dark colored web, where two colors are used, on the outside. In order to ob'viate this difficulty, I have arranged to place different tensions on the webs of differentjcolors with the greater tension on theweb of light color and to package this ladder construction with the light colored web on the outsideand the dark colcred web on the inside sothat if there beany difference in length, by reason of the packaging, the lighter colored web will be the longer and vthe blind will properly close, and the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished:

With reference to the drawing, I have illustrated an integrally woven ladder construction consisting of a main web I0 of light color and a main web ll of dark color. The cross members l2 consist of warp threads some of which are of the color of the main web It) and some of which are of .the color of the main web II. The warp threads l3 corresponding in color to the main web III as illustrated in Fig. 3 are woven into this main web and the warp threads H which are of the color corresponding to the web II are woven into the web II. The wefts such as l6 are all of one color which may be the color of-either of the two webs. This arrangement is more fully disclosed in my co-pending application, Serial No. 266,951, filed April 10, 1939.

In weaving this woven ladder formation the warp threads of the light color in main Web ID i will be placed under less tension and therefore have more take-up than the warp threads of the darker color main web II and this difference in tension and take-up will be such that for average conditions of atmospheric moisture and other conditions which change dimensions of textiles, a shrinking will occur greater in the dark colored fabric .than in the lighter colored fabric after the same comes from the loom so that the main webs will be of substantially equal length.

' colored main web ll approximately seventy-five units of weight will be placed upon the warp yarns of the lighter colored main web N. In

' other words, this would beapproximately the proportion which would be right in the average ladder web construction being made in accordance with this invention at the present time. It is to be understood that this amount may be varied. however, in accordance with the requisites above, which I have pointed out.

In the diagrammatic showing in Fig. 4 the warp yarns I8 which form the light colored main web ;III are drawn from a warp beam (not-shown) about asuitable guide roll l9 while the warp yarns .20 of the main web Ii are drawn about a suitable guide roll 2| from a warp beam 22. These webs as well as the cross tapes are woven in the loom by manipulation of the harnesses 23 and the webs together then pass over the breastbeam 2, sand roll 25, guide roll 26, to be packaged as at 21. The light main web Hi is on the outside as the tape passes ,over .thesand roll 25 where the webs are under tension-and any extension may occur. The reeling at 2! is under. little or no tension.

From this reeling the web is unrolled .and"

clipped to sever certain portions of the ladder members and then when repackaged as shown. at .28 the light colored web I0 is on the outside as on the sand roll and the dark colored web II is on the inside. all being wound upon asuitable core 29. In this manner any stretchwhen the web is hung and thus exposed to moisture shrinkage can occur and will occurto a greater extent in the light colored web which was woven under greater tension and with less;

However,

; ored web on the outside take-up than in the dark colored web and un-" der average conditions a suitable adjustment will be such that these webs will assume substantially the same length. The longer length, however, from the beginning is in the light colored outer we'b affording at all times proper closing of the slats 29 of the blinds which will cause andnclination oi the slats as shown in Pig. 2,

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible.

I claim: v

1. ,A rolled package of a band of integrally wovenladder construction comprising a pair of web structures, one of light color and another 7 the outer side of the rolled package whereby it is disposed along a greater radius and thus along a greater extent for any angle of a clthan the darker-colored web. a

2. The method or providinga lad deriweb pack age oi. difierently colored webs, which consists" members woven to connect said two webs, and

in' so' weaving providing substantially greater warp tension on the warps-oi the web of dark I color thanon the corresponding warps of the light color. :3. The method of providing a ladder web package of differently colored webs, which consists in weaving two webs of different colors, one light color and one of dark color with ladder members woven to connect said two webs, and in so weaving applyingsubstantially less warp tension :ori the warps of the web of light color than on the corresponding warps of the dark color, and rolling said woven structure with the light colof said roll.

GEORGE E, COLBY;

in weaving two webs of diflerent'colors, one t light color and one of dark color with ladder

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