US1594612A - Insulating tape - Google Patents

Description

w.y R. GILLlEs INsULATING TAPE Filed Feb. 1, 152s Patented Aug. 3, 1926.

UNITED STATES PATENT OFFICE.

WILLIAIVI R. GILLIES, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION ASBESTOS & RUB- BER COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF' ILLINOIS.

INSULATING TAPE.

Application nl ed February 1, 1923. Serial No. 616,439.

My invention relates to an insulating tape" which isadapted to be applied to fluid conducting pipes of various kinds.

The principal object 'of my present'invention is to provide such a tape which may be tightly and snugly spiralled around a pipe with the lateral portions of successive convolutions overlapping and interlocking with each other; the lateral portions of the tape preferably embodying a material such as hemp or manila rope which after application will not stretch to any substantial eX- tent nor have its cross-section materially dise torted under the longitudinal tensile stress,

or the lateral compressive stresse-s to which it is subjected during the process of applying the tape to a pipe.

In the accompanying drawing illustrating my invention Figure 1 illustrates the manner of applying my improved tape to a pipe;

Figure 2 is a fragmentary longitudinal l section taken on the line 2 2 of Figure l;

Figure 3 is a transverse sectional view of the tape;

Figure 4 is a transverse section of the sev-l eral elements of the tape as they appear vprior to the closing of the fabric sheath,

and

Figure 5 is a view similar to Figure 3, but

` illustrating a modified embodiment of my invention.

Similar characters of reference referto similar parts throughout the several views. In the drawing, A indicates the tape of my invention, B a pipe to which the tape is applied, and C devices which maybe applied to the tape at intervals, if desired.

The tape A consists of a sheath l, which is preferably formed of a heat insulating and heat resisting material, such, for instance, asa textile fabric having woof and warp cords of asbestos fibre. The sheath 1 is formed, cementedand stitched toprovide three parallel compartments or pockets, all of which are co-extensive with the tape, namely, the middle pocket Y2 and the lateral pockets 3 and 4. It will be noted that each of the pockets 31and 4 is spaced from the `pocket 2 and connected therewith by aweb '5 formed by two thicknesses of the material of sheath l. y l

Disposed side byfside within the pocket 2 and extending continuously and longitudinally therethrough is a plurality of indeand extending continuously and longitudinally therethrough are the elements 7 and 8, each of which is preferably formed of a material "such as hemp or manila rope, which in contradistinction to the felt ropes 6 6 has considerable tensile strength, and is not subject to any considerable cross-sectional distortion under the stresses to which it is subjected during the process of apply ing the tape to a' pipe. f

In the manufacture of the tape of my inventi'on, the Sheath 1 is conveniently initially in the form of a long, flat strip of asbestos fabric, asbest illustrated in Figure 4. The asbestosropes or felt strips 6 6 and the relatively stronger and harder ropes 7 and 8 are placed longitudinally of the sheathed strip as shown in Fi ure 4. The edges 1** 1a of the strip are t en brought together and overlapped, as illustrated in Figure 3,l and are permanently secured together in any suitable manner, the severalA wise securing together the lateral edges of an asbestos fabric strip, as hereinbefore eX- plained. As illust-rated in Figure 5, the sheath lmay be in the form of a single piece of circular loom, conformed and stitched to provide the several pockets 2, 3 andj4. In manufacturing this type of tape, A, the stitches 9 9 are preferably made after the materials 6, 7 and 8 have been drawn into the textile fabric. y h d In applying the tape to a pipe t at en o thetape which is first appliedis preferably beveled a distance equal approximately to three times the diameter of the pipe. .One

with those turns of the tape which it overlies and by which it -is overlaid. The ropes 7 and 8 'possess considerable tensile strength, and may be drawn .very tightly "into the interlocking relation just described. Moreover, the ropes 7 and 8 being relatively hard hold their cross-sectional shapes without appreciable distortion, and are thus capable of maintaining' their aforesaid. interlocking relation after such relation has been established. A plurality of bands or hose clamps of the type illustrated at Cmay be appliedl at intervals if desired.

From the foregoing description, it will be seen that the sheathed ropes or cords 7 and strands of material having 8 in effect constitute beads which are co.

extensive with but spaced from and connected to the sheathed heat 'insulating material 6 by relatively thin fabric webs. The members 7 and 8 when formed of hemp or manila rope have considerable value as heat insulation, rbut it will be understood that such ropes may, if desired, be formed from a material having insulating qualities as goodor substantially as good as the insulating qualities of the material 6. p

' Having thus illustrated and described a preferred embodiment of my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. An insulating tape comprising a central'v portion of heat insulating material, and lateral beads connected with said central portion by relatively thin webs.

2. In an insulating tape, a relatively wide central portion` of heat insulating material provided at its lateral margins with depressions and beads, the latter comprising relatively great tensile strength. f

' 3. In an insulating tape, a relatively wide central portion of heatl insulating material webs connecting said central portions withy beads of relatively great tensile strength.

4. An insulating tape comprising a bodyportionprovided at each of its lateral m'argins with two longitudinal depressions and a longitudinal bead.

5. An insulating tape comprising a-central portion comprising insulating felt, rela# tively strong strands co-extensive with said felt and spaced laterally therefrom, and a single textile fabric sheath enclosing said felt and said strands. p

6. An insulating tape comprising a central portion of insulating 4-felt, relatively strong strands co-extensive with said central portion, and spaced laterally therefrom, and a single sheath of heat resisting fabric enclosing said felt and said strands.

7. An insulating tape comprising a central portion of insulating felt, a pair `of relatively strong strands co-extensive with and spaced laterally from said central portion, and a. single fabric sheath enclosing said felt and strands, said sheath being longitudinally stitched to separate the strands from the felt.

8. An insulating tape comprising a fabric i sheath constructed to provide a relatively large central pocket, and relatively small lateral pockets co-extensive therewith, and

. insulating felt lling said central pocket and strands of considerable tensile strength filling said lateral pockets.

9. An insulating tape comprising a central portion of insulating felt, lateral tins, embodying relatively hard material, co-extensive with said central portion, and a single fabric sheath enclosing said felt and thedrelatively hard material of the fins aforesai l0. An insulating tape comprising a tube of heat insulating fabric longitudinally stitched upon itself to aHord an elongated central pocket of considerable area in transverse cross-section and lateral pockets ofl lesser transverse cross-sectional area which are co-extensive with said central pocket,

said central pocket containing a iiller in the form of a good heat insulating material, each of said lateral pockets containing a relatively hard filler.

In witness whereof, I hereunto subscribe my name this 23rd day of January, 1923. v

VVILLIAMA R. GILLIES.

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