US1890869A - Lightproof fabric for window shades and the like - Google Patents

Description

Dec. 13, 1932' w. cLAlR 1,890,869

LIGHTPROQF FABRIC FOR WINDOW SHADES AND THE LIKE Filed July 30, 1952 IZ /Z MLL/AM M J7? CLA/e UNITED. STATES PATENT OFFICE WILLIAM M. STLCLAIR, OF CHICAGO, ILLINOIS LIGHTPROOF FABRIC FOR WINDQW SHADES AND THE LIKE Application filed July so, 1932.

This invention relates, generally, to lightproof fabrics. It moreespecially relates to such fabrics as are intended for use as window curtains in hospital and laboratory X- ray rooms, photographers dark rooms, and similar places from which it is essential that all outside light be excluded.

In the provision of a light proof fabric of this nature, intended primarily for window curtain use, there are two points other than light impenetrability that are highly important. Firstthe fabric, in order that it may be wrapped about a curtain roller, must be possessed of great longitudinal flexibility. Second-the fabric, in order that it may withstand continued usage, must be possessed of strength and durability and be so constructed that it will resist all tendency to fray, warp, crack,'or otherwise lose its necessary attribute of light impenetrability. This may be best accomplished by providing the fabric with a degree of transverse strength and rigidity which will cooperate with the longitudinal flexibility of the fabric to insure results of the greatest value.

The object of this invention is to provide a lightproof fabric, especially suited for win dow curtain use, which will not only be impervious to light but which will be possessed of great longitudinal flexibility and relatively great transverse rigidity.

With this object in View, the invention consists, in general, of the structural characteristics and combination of parts illustrated in the accompanying one sheet of drawing, completely described in the following specification, and specifically pointed out in the appended claims.

In the drawing, wherein like characters of reference indicate like parts in the several views Figure 1 is a face view, on an exaggerated scale, of a portion of light proof fabric constructed in accordance with, and embodying the principles of this invention.

Figure 2 is a transverse sectional view, on

an even more exaggerated scale, on the line.

2-2 of Figure 1,

Figure 3 is a similar view, on the same scale, on the line 33 of Figure l and Serial No. 626,883.

Figure 4 is a view similar to Figure 3 and on the same scale, but illustrating a medi fied form of the invention.

The fabric illustrated in Figures 1, 2 and 3 consists of a woven web having weft members 10 and warp members 11, and associated with a backing member 12.

The weft members 10 of the woven web may be of wood, wood fibre, reed or metal. They are preferably substantially circular in cross section, as shown in Figure 8, and should be non-textile in nature.

The warp members 11 of the woven web may be of cotton, and preferably are, but should be of textile material.

The backing member 12 which is associated with the woven web may be of leather, imitation leather, leatherette, felt, or any similar material, preferably homogeneous in character.

It may be stated, in an explanatory manner only and not to be taken as implying any limitation upon the scope of the invention, that highly satisfactory and gratifying results have been attained in instances wherein there has been utilized a wood fibre weft,

a cotton warp, and an imitation leather backing.

In the manufacture of fabric in accordance with this invention a woven web of wefts 10 and warps 11 is first produced. This web is then glued, cemented, or otherwise permanently secured to the backing member 12.

The resultant fabric will be light proof, g5 longitudinally flexible, and, relatively, laterally rigid. Thus there has been produced a fabric which embodies the principles of this invention, which is economical to manufacture, and which is very eflicient for the purpose intended. I

In Figure 4 of the drawing there is illustrated a modification of the invention wherein there is shown a fabric in which the nontextile weft members are substantially semicircular in cross section. This construction is desirable in certain instances wherein it may be advantageous to provide a woven web having a relatively flat back upon which to attach and secure the backing member 12.

Many other modifications of construction will readily suggest themselves to those skilled in the art, and it is to be understood that all changes in form, nature, and relation of parts differing from those defined in the purely instructive and illustrative showing herein are contemplated as forming a part of this invention and are reserved thereto in so far as they fall within the scope of the following claims.

I claim 1- 1. A fabric of the character described comprising a woven web having non-textile wefts and textile warps, and a flexible backing member secured to such web.

2. A fabric of the character described comprising a woven Web having wooden Wefts and textile warps, and a flexible backing member secured to such web.

3. A fabric of the character described co1nprising a woven web having wood fibre wefts and textile warps, and a flexible backing member secured to such web.

4. A fabric of the character described comprising a woven web having reed Wefts and textile warps and a flexible backing member secured to such web.

5. A fabric of the character described comprising a woven web having metallic wefts and textile warps, and a flexible backing member secured to such web.

6. A fabric of the character described con1- prising a woven web having relatively rigid wef'ts and relatively flexible warps, and a flexible backing member secured to such web.

In testimony whereof, he afIiXes his signature.

WILLIAM M. ST. CLAIR.

Images