US 2238878 A
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Description (OCR text may contain errors)
April 22, 1941. A. BAITZ ErAL 2,238,878-
BANDAGE Filed NOV. 13, 1940 FL :13 a; 25 24 H II lNVENTOR5 Law-k ATTORNEY 147,420 filed June 10, 1937.
Patented Apr. 22,1941
UNITED STATE PATENT OFFICE BANDAGE Alexander Bait:
a d Samp B Royal Park" 7 Victoria, Australia Application November 13, 1940, Serial No. 365,458 In A flu June 20, 1936 '2 Claims. (Cl. 128-156) The present application is a continuation-inpart of the co-pending U. '8, application Ser. No.
an improved bandage the is absorbent and is as pliable as ordinary fabric,
An improved bandage according to this invention consists of gauze, cheese cloth, butter-muslin, or other suitable pliable absorbent textile material (hereinafter called base material) on one or both surfaces of which small spaced fragments of raw human skin or hair, are deposited in such manner that the capillary interstices within the individual threads of the base material are kept open and the absorptive property and pllability of the base material are not impaired.
In order that this invention may be more readily understood, an improved bandage material according to the invention and several methods for manufacturing the same will now be described with reference to the accompanying diagrammatlc drawing in which:
Fig. 1 is a diatic-pian view of a part of a bandage according to the invention on a greatly enlarged scale;
Fig. 2 is a sectional view of the same bandage taken on line 2-2 of Fig. 1; r
Fig. 3 is a sectional elevation of an apparatus for ,preparingbandage material of the type shown in Figs. land 2 according to one method;
Fig. 4 is a sectional elevation of apparatus for preparing bandage material according to the inventicn by a modifled'proces z Fig. 5 is a sectional elevation of apparatus for preparing bandage material according to the invention in a further modified process.
Referring to the drawing, and first to Figs. 1 ll denotes the interwoven textile threads which form the gauze or cheese cloth for the bandage accordare the relatively large the individual threads of numeroussmall ing-to the invention. spaces or. pores between H. Each thread Ii filaments or fibres it which leave between them rubber alone,
" other suitable base material it travels rubber, which does not adhere to I as to leave the travelling base material interstices it. interstices ll a great number of small capillary The. presence of these capillary within the individual threads is responsible for I the absorptive properties of the base material.
Small spaced fragments ii of a tacky adhesive which does not stick to the preferably of raw rubber, are deposited on the outer surfaces of the fabric and on the outside of the individual threads II in such a manner individual threads entirely structed, whereby pliabillty of the base material are substantially preserved. v
The bandage material shown in Figs. 1 and 2 may be produced by any suitable method or apparatus.
In the method illustrated in Fig. 3,
open and unobgauze or from a supply I! over a roller ll adjacent to which is a spreader blade is. stem Ill and a hand wheel II are provided to enable the spreader blade I! to be adjusted relatively to the roller it, to control the quantity of rubber which remains on the material it. A viscid mixture or plastic mass comprising raw rubber mixed that it will not stices it within base material, spreader blade elled relatively to the spreader blade, mass is caused to revolve percolate into the capillary inter the individual is arranged in it. As the base material is travthe rubber 'tic roller 22, Small fragments of the rubber mass which adhere to the surface of the gauze torn off the roller and are deposited in the individual threads without mass entering the capillary intersti In this manner, a sumcient quantity surface .of
arranged on the outside of the individual threads torenable this surface to cohere with-another similarly treated surface with which it may be brought into contact.- The blade ll removes any surplus rubber mixture.. I
To evaporate surplus 'liquid and to suitably condition the rubber, the treated material is sub Jected to heat by, for example, adjacent to a series of steam chests 23 after which it passes over guide rollers It and ii to a winding roller 20.
capillary interstices it within the the absorptive property and Means such as a screwed with a solvent, of such viscosity threads ll of the front of the in contact with the ii in the form of a piss-- being travelled The material is then treated on the other face by againpassing it through the machine with the untreated face uppermost. In the method illustrated in Fig. 4, the material passes from a supply 21 under a roller 28 which dips into a bath 29 containing an oily volatile liquid such as benzine, and then between rollers 30 which gently squeeze'out the surplus liquid but leave the capillary interstices still filled with benzine. A diluteaqu'eous dispersion of rubber latex is then distributed on the wetted travelling material by means of rows of spray nozzles 3|. The fineness of the spray is regulated in such a manner that numerous small spaced drops of a 60 per cent concentration of rubber latex.
To evaporate the wetting agent and the aqueous content of the latex dispersion the treated material is subjected to heat by causing it to travel between heating elements 32 after which it passes between pressing rolls 33 and over a guide roll 34 to winding roller 35. After evaporation of the oily volatile liquid and of the water, the rubber adheres to the outside of the individual threads I l in the form oi small spaced fragments, while the capillary interstices I4 within the threads II are once more open and unobstructed.
In the method illustrated in Fig, 5, base mate rial from a supply 36 passes over a roller 3'! and then between rows of nozzles as 38 through which raw rubber mixed with a solvent in liquid or semiliquid state is extruded in the form of fine semisolid threads or filaments which are directed on to the base material l6 by air currents from fans 39. The threads or filaments are firmly fixed on the fabric by any suitable pressing means such:
as a pair of blades 40, 4|. One blade (40 for example) may be movable and be provided with means as a weight 42 to exert the desired pressure while the other blade (4| for example) is fixed.
The treated material is wound on to a, roller (not.
shown) as before described. The semi-solid rubber threads are disposed on the outside of the individual fabric threads II in the form of small spaced fragments none of which enters the capillary interstices I4 within the individual threads so that the interstices l4 and unobstructed.
remain entirely open chalk or like material The base material may be of any suitable colour (such as flesh. colour) or suitable colouring may be incorporated in the fluid mixture. Antiseptic and/or aromatic substances and/or any suitable agent to promote healing of a wound may be incorporated in the mixture or be applied to the base material at any stage.
' :The treated material is cut in known manner into strips of suitable width to form bandages. A bandage which will more readily follow the contour of the member on which it is wound may be formed by cutting treated woven fabric on the bias, at an angle of 45 degrees for exampie, or knitted fabric may be used.
. If so desired, the whole or any part of a bandage may be treated with talcum powder orfrench so that it will not cohere with other parts of the bandage.
In use, it is only necessary to overlap the windings of the bandage sufflciently to enable'a treated portion of a winding to cohere with a treated portion of contiguous winding. .The free end of a bandage may be secured by causing it to cohere with a treated part of one or more windings'and if the said free end is cut diagonally to a point,
of said base material, the capillary interstices within the individual threads being open and unobstructed, whereby said surface adheres only to itself and the absorptive property and pliability of the base material are substantially preserved.
2. A bandage comprising sorbent textile base material including interwoven textile threads, and spaced small fragments of raw rubber deposited exclusively on the outside of the individual threads on both surfaces of said base material, the capillary interstices within the individual threads being open and unobstructed, whereby superposed layers of the base material cohere while its absorptive property and pliability are substantially preserved.
ALEXANDER BAITZ. SAMPSON BAITZ,
a strip of pliable ab-