US2435944A - Venetian blind and method of making the same - Google Patents

Description

VENETIAN BLIND AND METHOD OF MAKING THE SAME Filed July 22, 1944- 2 Sheets-Sheet l INVENTOR 679 ar/es. W

ATTORNEYS Feb. 10, 1948. c. w. POLLARD I VENETIAN BLIND AND METHOD OF MAKING THE SAME Filed July 22, 1944 2 Sheets-Sheet 2 2 4i fizzy 9 I i Q 1 I fag/6" 42/165 wpwwfd Patented Feb. 10, 1948 VENETIAN BLIND AND-METHOD OF G THE SAME Charles W. Pollard, Chicago, Ills, assignor to.

InternationalBraid Company, atcorporation-of Illinois.

Application Ji1ly'22; 1944; SerlaFNb. 546,115"

This invention relatesctoia: Venetian" blind and more particularly. tora-Ven'etian blind: from which the slats. may be: removed and replaced. without disassemblingtthe lift: cords. or: any of. the other operatingparts offthe. blind.

The. most. common form: of Venetian blind is q pp d with'a slat which: has an opening intermediate. the edges and. throughthi's' opening the" lift' cord for the bl'ind for? collapsing the sameis threaded. vMore recently there has appeared on the market the type of slat which is provided with an opening which leads inwardly from one of its: edges, into which opening'the' lift cord may be positioned thus making; the slat re:-- movable from the webbing. and. other. assembly without detaching anyof the parts. This type of slat is illustrated in United states Patents-No. 2073 016, March 9, 1937; No. 2,091,579, August 31,1937; No. 2,123,010,,July. 5,. 1938; No. 2,200,349, May 14, 1940. Even though a slat of this more recent type above described is utilized it still becomes necessary to position-the lift cord from the tilt orrock rail of the blind down through the cross tapes of the ladder web for attachment to the bottom rail of the blind. Such a lift cord must be positioned between the opposite webs and also on one side of one cross tape and the other side of the next cross tape and so on so that the lift cord will lead fairly between cross tapes which are located at opposite edges of the webs.

One of the objects of this invention is to provide a drawing-in strand in the ladder web so that the lift cord may be attached to this drawing-in strand and quickly pulled from the tilt rail down through to the bottom rail without the necessity of being careful to thread the lift cord properly with respect to the cross tapes between the webs.

Another object of this invention is to provide this drawing-in strand in the ladder web at the time of weaving the ladder web in the loom, thus mechanically positioning it without manual labor.

Another object of this invention is to simplify the assembly of a Venetian blind by the use of ladder web having this improved drawing-in strand.

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 drawings:

Fig, 1 is a diagrammatic view illustrating the drawing-in strand as positioned in the loom with 2 Claimst (Cl. 1394-384.)

2 the otherrwarpthreads which go tomake up the fabric? Fig. 2sisa perspective view ofladder: web after woven andsspreadapart to illustrate the; drawing?- in strand in position;

Fig. 3lis. a: perspective" view of'the tilt railcwith the ladder web: attachedthereto and illustrates th drawing-in strand. between: the: two. ladder webs prionto" the drawing-in of. thelift cord;-

Fig. 41 is an elevational view ofr a fragmental portion of the blind illustrating the lift cord: as tied to the drawing-*-in:strand just priorztcpulling. the cord into position; v

Fig. 5 is: a sectional: view illustrating the lift cord as drawn into position and secured to the bottom mil with the opposite webs of ;'the ladder web ready to be attached to the bottom:rail;-*

Fig. 6 is a sectional view similar to Figl5 but illustrating" the-ladd'er web as attached to the bottom rail;

Fig; 7 isaview similar-to Figs. 5 and 6 but-illustratingthesl'atsas in position;

Fig. 8 11s a top-plan view of one ofthe' slats? Fig, 9 is a bottom view on line 99 of Fig. 5;

Fig. 10 is a bottom view on line Illl0 of Fig. 6;

Fig. 11 is a top plan view of the bottom rail; and

Fig. 12 is a sectional view of the bottom rail on line l2-l2 of Fig. 11. I

In proceeding with this invention, I first position in ladder web as woven, a drawing-in strand which extends from some supply source, such for instance as a warp beam, through the loom free of the harnesses and so located that it will not interfere with or become interwoven with any of the filling thread as the shuttles pass back and forth across the loom. It will be located in the center of the ladder web and between the two lines of cross tapes, also, of course, between the outer webs. It will lie idle in this position during the time that the ladder webbing is formed and will not be cut at the time that the cross tapes are cut permitting the webs to open. The drawing-in strand will be packaged with the ladder web and no use will be made of it until the blind is assembled, Then, after the ladder is positioned on the tilt rail or just prior thereto, the lift cord will be tied to one of these drawingin strands and drawn into position between the cross tapes and between the opposite webs which is far quicker in assembly than to attempt to thread the lift cord in its proper position with reference to the cross tapes.

With reference to the drawings, l5 designates diagrammatically a loom having a plurality of harnesses [6 through which the various warp threads l1, l8, I9, 20, 2|, and 22 extend for manipulation, these warps being led from the usual warp beam as a supply. There is also centrally located amongst the warp threads a drawing-in strand 25 which does not pass through any of the harnesses but which extends under tension in the loom and is reeled between the opposite webs 26 and 21 as the same is drawn over the breast beam 28 and packaged as at 29. This strand 25 is drawn in by the webs as they are packaged and lies loosely in position between the webs 26 and 2'! as shown in perspective in Fig. 2. The usual cross tapes 36 on one side and 3| on the other side of the webbing are provided. The drawing-in strand 25 is positioned in the loom so that as weaving occurs it will be located centrally between these rows of cross tapes. 7.

3| with the lift cord 35 located in the notches 45 of the slat. The rocking of the tilt rail may then take place by means of the cords 45 in a usual manner.

By this arrangement of simple mechanical rigging of the loom the drawing-in strand may be positioned in the ladded web without appreciable expense and yet the time which is saved in threading the lift cord in the Venetian blind makes ladder web so constructed far more salable than heretofore. The invention is limited to the Venetian blind in which the slats may be positioned after the lift cord is in place.

I claim:

1. The method of forming a Venetian blind ladder web which comprises weaving the ladder web with cross tapes and laying in warpwise of In assembling the Venetian blind the ladder 7 web 26 and 21 are secured by some brads or the like 32 to the tilt rail 33, The tilt rail may then be positioned in its brackets 34 and the lift cord 35 will then be passed through the notch 36 of the tilt rail and attached to the drawing-in strand 25 by a suitable knot at 37, see Fig. 4. It is then merely necessary to draw or pull from the other end of the drawing-in strand 25 to'pull the lift cord 35 down through the cross tapes 30 and 3| into its proper position, thus saving the time and labor of attempting to thread the lift cord between these cross tapes which are loose and flimsy and usually require considerable handling. The lift cord 35 is then knotted into the bottom rail 38 in the recess 39, as shown in Fig. 5, by the knot 40 and tacked in position by the nail 4|. The opposite portions of the webs 26 and 21 are then folded over the bottom rail 38 and tacked into position as at 42 and 43.

The slats which are used are designated 44 and, as shown in plan view in Fig. 8, are provided with openings or notches 45 extending inwardly from opposite edges. This type of slat may then be positioned on each of the cross tapes 30 and tioned between said webs and alternate cross tapes and also of continuous length having substantially the same length as said opposite webs.

CHARLES W. POLLARD.

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

UNITED STATES PATENTS Number Name Date 2,317,660 Williams Apr. 27, 1943 328,286 Carr Oct. 13, 1885 FOREIGN PATENTS Number Country Date Great Britain 1897

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