US1345693A - Composite heat-insulating sheet - Google Patents

Description

l D. W. PYIE. corwPosaTr-i HEAT INSULATING SHEET APPLICATION FILED DEC. I5, I9I8.

lPmfenIteIII qIIUxIy @9 M2M.

wx www W www www.

' namens.

Specification of Letters Patent.

llatented duly n, lat).

.llpplication 'tiled 'lllecember lo, tutti. terial Lillo. itt-36h53. A

To all cli/tom t may concern:

Be it known that ll, DAVID W.. lmrn, a citizen of the lUnited States, and a resident of Red Banti, county of Monmouth, and

tritate of New Jersey, have invented certain new and useful lmprovements in llomposite Heat-insulating fdheets, of which the following is a full, clear, concise, and enactV description, such as will'enable others skilled in the art to which the invention relates to make and use the same, reference being made therein to the accompanying drawings, which form apart of this specification.

My invention relates to composite sheets made up of a main body portion of felted material, together with a protecting or backing sheet of other material overlying the yp felt body portion and serving to protect the Htl lll ti same, and also to strengthen the same to a greater or less degree; .and the object ofmy invention is to provide a composite heat insulating sheet, quilt, or fabric'of the type above referred to which isformed of' amain body. portion of felted material secured to which is a layer or sheet of paper, the two being joined together by forcing a needle or similar article through the felted material and through the layer of paper whereby fibers of the felted material are .forced through the punctured openings in the paperv and firmly clasped by the edges of said openings as the needle is withdrawn.

\ A further object is to provide a heat insulating sheet or fabric wherein the reinforcing baclring sheet is formed of paper, so as to be impervious to liquids, whereby cemena-paint, varnish, or other liquid composition, may be applied to the paper paclring lll@ and thus anchor the protruding fibers of the feltedl material to the paper backing and without danger' of the felted material ab-` protecting coating during its apovercome these difficulties by providing an imperforate backing sheet of paper and carrying fibers of the threaded material.

through minute punctures in the paper backing," the sides of the punctures closing` againstv the fibers as the puncturing instrument is withdrawn, thereby locking the fibers to the backing sheet of paper and rendering the entire article impervious to moisture, and further, allowing a liquid coating such as paint, varnish, cement, or other desirable material, to be applied to the backing sheet without causing the felted material to absorb the same, which latter would materially interfere with the heat insulatj ing properties of the article.

lilly inventionv is regarded as including a composite sheet having the characteristics above pointed out, as well also as the method or process whereby the same is manufactured or produced, all as hereinafter explained in detail and particularly claimed in the coni cluding claims.

lily invention has special reference to the provision of a `composite sheet or fabric made up for the most part of felt material, and designed for use about metallic railway cars, in order to prevent the flow of heat or cold through the wall thereof; although it will be appreciated that the same may be used in any place where it is desired to prevent the flow of heat from one body to an other', may be used to lessen the transmission of sound through a floor, wall, partition, or

other structure, or for any and all other pur-4 poses for which such a composite sheet is adapted. lin the innl a part of this specication:

ligure l is a perspective viewl illustrating a section of a composite sheet made in acp cordance with my invention;

' 2 is a view showing a section of the sheet, the surface of the covering or strengthening layer thereof being coated with a suitJ able cement material;

'lliig 3 is a view showing a section of a thicker sheet made up by securing two such sheets as are shown in Figs. l or 2 together, by quilting; and

ig. l is a view illustrating the process of manufacture whereby my improved composite sheeting is produced.

Referring to the drawing, the reference,

numeral 5 designates the main bodyl portion of niy improved composite sheet, the same.

drawing accompanying and formtill lill

lll)

being of felt material produced by felting hair or other fiber or material which will felt into a compact mass of considerable thickness in accordance with any of the well known felting processes; the manner in which the felt layer is produced being of secondary importance, and not involved in this present invention.

The reference numeral 6 designates a .strengthening or protecting sheet overlying the'body of felted material 5 and affording protection to the same, and, incidentally, more or less contributing to the strength of the felt material and of the composite sheet of which it forms the principal part. Furthermore, the protecting sheet provides a sheet to secure them together as hereinbefore pointed out; this end being accomplished by placing the felt body portion upon the strengthening sheet, and then forcing a needle 7 or equivalent implement through the two, whereby fibers of the felt body portion are carried therefrom through holes made by the needle in the protecting sheet; the needle both forming the holes in said Y sheet and carrying the fibers from the felt through the holes, as illustrated in said figure. Whilein describing the method whereby the felt body portion and protecting layer are secured together I have referred to a single needleor equivalent piercing member, it will be appreciated that in practice a large number of such members will be assembled in a single holder designed and arranged to operate upon the fabric, to thereby provide a device for securing the felt ybody portion and protecting sheet together ra idly and efficiently.

n the finished sheet the protecting layer will be secured to the main felt body portion at a large number of places throughout the area of the composite sheet, as shown in l Fig. 1 the distance apart of the separate fastenmgs thus provided being largely a i matter of choice, and dependent obviously upon the degree of security with which the felt and the overlying protecting sheet are to be fastened one to the other.

In va composite sheet such as is shown in Fig. 1, the backing material or sheet 6 will be secured to the felt body portion with sufcient security for many purposes, and a sheet of the form in which it is shown may be used without further treatment for many purposes. I prefer, however, to coat the exposed surface of the sheet 6 with a suitable cementitious material 8 to thereby secure the fibers 9 and the sheet 6 together more effectively, and to provide .a smoother exterior surface for the finished sheet; the material thus applied serving to smooth the burs produced in the protecting sheet by the needle 7, to fill the holes l0 around the fibers 8, to fasten the fibers themselves to the exposed surface of the sheet, and to coat the sheet, as will be appreciated; thus providing a more finished sheet and one which will present a more` pleasing appearance. The resulting sheet may also be more readily manipulated in installing the same because of the presence of the coating material, and a certain degree of additional protection willbe secured by the use thereof. The coating material in question may be a suitable cement, paint, varnish, or in fact any liquid coating composition which will accomplish the ends above mentioned.

The reinforcing sheet is preferably formed of some nonporous paper which is impervious to moisture and will absorb but little of the cement, paint, or varnish of the coating composition. Further, the paper matcrial increases the heat-insulating properties of the article, in that it prevents any air from circulating therethrough.

Fig. 2 shows a composite sheet made in accordance with my invention and in which .a coating cementitious material 8 has been applied to the exposed outer surface of the protecting sheet 6, as above pointed out; and which sheet may be used in the form thus produced for many purposes. I prefer,

however, to secure two such composite sheets -as are shown in Fig. 2 together with their felted body portions in contact with' one another, as shown in Fig. 3, the two sheets being preferably Secured together by rows of stitches, as shown at 11, as in ordinary quilting operations. This obviously produces a much thicker sheet and one more effective for heat insulation, sound deadening, or other purposes for which such sheets are used; and, furthermore, produces a composite sheet, in which both exterior faces are protected by overlying strengthening or protecting sheets, as heretofore explained. The exposed surfaces of the protecting sheets are themselves shown as protected, and a more firm bond secured between them and the felted body portions, by means of an exterior coating of cement, paint, varnish, or other material, as hereinbefore explained. The cementitious material employed in producing the composite sheet wherein my invention consists is preferably a material having fire-proofing qualities, from which it follows that, in addition. to the function nate-eea which the said material performs in 'providing a more firm bond between the protecting backing Sheet or sheets 6 and the main body of felt material upon which it lies., it provides a composite sheet which Will have fireresisting qualities to a Very considerable extent the protecting sheet and the cementitious material upon the surface thereof thus imparting fireproof or fire-resisting qualities to the main felt body portion ofl the sheet to a marked degree.

li-laving thus described and explained my invention, l claim and desire to secure by lietters Patent:

l. A heat insulating article of the class described comprising a body portion of felted material, a sheet of paper overlying said lelted body portion and forming a protecting baclring, fibers of the felted material extending through minute punctures in said paper sheet and a coating of cementittons material upon the exposed surface of said protecting sheet of paper, embedding the protruding fibers therein.

2. A heat insulating article of the class described comprising a body portion of felted material a protecting backing sheet of paper overlyingsaid felted body portion, fibers of the felted material extending through minute punctures in said paper sheet, the side walls of the punc-tures closed and gripping said fibers and preventing the absorption of a cementitious material by the felted material, and a coating of cementitious materialv upon the exposed surface of said protecting sheet of paper and embedding and anchoring the protruding fibers of the felted material thereto.

ln testimony whereof ll have signed my name to this specification this llth day of December, 1918.

Dl-llliD W.. PYE..

Images