US1659185A - Heating bag - Google Patents

Description

Feb. 14, 1928.

H. H. BAKER HEATING BAG Filed April 1.- 192s Patented Feb. 14, 192s. Y

l1,659,1aa

UNITE STATES P ,a'raNr o'Fr-'lxcagf1 i nowann n. nanna, or nUruLo, 1v1-:wreak nm'rme BAG, p

, Application mea Api-u '1Q 1926. serial ma sans;

My invention relates to heating haus or like devices, and more .particularly to that type of heating device in which is eonnedn heating composition capable ofv generating heat 5 upon the introduction thereto of a suitablequantity of water.4

One of the objects of this invention is to i provide the heating device with a casing or` bag of improved construction and in which l provision is made for conveniently insertinc thel chemical heating element or pad with which such devices are provided` and for as geadily removing the heating element therewv rom. 'j v l Another. object of the invention is to con-` struct the casin or bag .so that certain Walls thereof, especia y-the wall to be'placed in contact with the surface of the body or arti# cle. to be heated, of material impervious to moisture. x

Another object is to make provision in the construction of the casing or bag for the escape of steam or moisture from wit-hin, without resorting to the use of perforationsor openings in any of the walls of the casing or bag; the construction so provided permittin also the entrance of air into the casing or ag to assistV in the chemicalreaction set up Within the heating element upon the insaid construction also assures proper evaporation. of' moisture and steam so that the chemical reaction will continue forI a prolonged period.

' provision of a casing or bag having a wall formed of material impervious to moisture and impervious or substantially impervious to air, and a wall of slow-absorbent material embodyin in its construction minute interstices for t e admission ofrair and .for the escape of moisture and especially steam generated under the chemical reaction'taking place within the casing or bag; the latter having referably, although not necessarily, an overying wall or .flap asa continuation of the first-mentioned wall, which overlies or laps a portion of the wall formed of said slow-absorbent material, so that a restricted area of the latter is exposed. Y

A still further object ofy my inventionis to rovide the lwall or walls ofthe casing or lieg which are impervious tojmoisture and also to air or substantially so, .and which may be termed airproof,and moisture-proof troduction of a quantity of water thereto;

A' further object of *thev invention is the' Walls, with :a moisture absorbent lining "so that thejinterior surfaces of saidwall or walls, with which the chemical heating pad' or element lies in contact, will remain moist and assist in lengthening the time ofusefulo0- ness "of each charge of water furnished the chemicals with-the heating pad or element.

The invention further hasfor its object the provision ofv a Ycasing or bag for chemical heatin ads or other similar elements, e5, which is o simple construction, inexpensive and durable, and the construction of which permits of a design which isi-neat, convenient to carry, andapproaches in appearance ahand purse, thereby` providing-anarticle 10 which may be used in a sick room intli'eu of.

the conyentional hot-water bag, but which may be as readily used' as a traveling com panion, especially since 'the exterior thereof ends itself tov various embellishments.-

With the above and other objects in view,

the invention consists in the novel const-rucvention is illustrated in detail in-the ac companying drawings, in which Fig. 1 is a perspectiveY view of Aa 'heating 85 device embodying my invention, vthe vsame being shown in closed condition.

Fig. 2 -is a perspective view of the Vdevice vshowing the same open to permit the ready moval of the heating pad or element therea0A om,

I' Fig. 3 is an enlarged transverse section `*through the device, taken on h ne 3.-'3,

Fig. 4 is an enlarged sectional detail view 95 y Showlng' the construction of the moistureproof and air-proof wall The invention 'is adapted for use in con; nection with, and'particularly` to enclose a lchemical heating pad or element which is designated bythe numeral 5. This pad or element 5` may be constructed in variousways, but usually is flexible and made in the Y form of a sack having a suitable filling opening 6 through which heat-*generating mate- 106 rial Z is vsupplied fto the sack. VIt is constructed of porous or. Aaifaorbeutmaterial,

" usuy canvas or-duck, and the bulk of heating a terial supplied thereto is yielding or phable so that the pad or element may con- I out in 'the Subjoined ad' quantity of water is to be added through\ the filling opening of the sack at the time generation of heatis desired. However, as

this invention pertains more particularly to the casing or bag in which the heating pad or element is to be placed, it will be apparent that any other chemical heating pad or element may: be used in connection therewith.

Thesack isV only partly filled with the 4heating composition and therefore retains a comparatively flat shape, and the unfilled portion of the sack, designated by the numeral 8, is adapted to be folded, as at 9.

10 designates my improved bag or casing into which the heating pad or element is placed, and it comprises two pieces of iex- ' ible material 11, 12, one of which is longer than the other. "These two 4pieces of material are sevved or otherwisepconnected together alongthree of their marginal edges, as at 13, lto form a pocket 14, into which the filled portion of the heating" pad or element is inserted, While the unfilled portion of said pad or element extends outwardly from said pocket'and is folded over the short piece 11 of the fie'xible material, as clearly shown in Figs. 2 and 3.

vThe long piece 12 of flexible material extends beyond the opening of the pocket 14 and is folded,`as at15, to forni an overlying flap' 16. This overlying flap extends over the, unfilled extending portion of the heating pad or element 5 and conceals the samey and from its folded portion 15 .is gradually narrowedto its outer end, as at 17. The tapering of the flap 16 gives the bag or casing a finished appearance and also serves an additional purpose, to appear hereinafter.. l'

While, as stated, the flexible pieces 11 and 12 may be sewed or otherwise united along three marginal portions thereof, I preferably use a binding, such asshovvn for this purpose, which also conceals the edges of the material' and prevents frayingof the same. Furthermore, this binding embellishes the bag'or casing and is continued 'alongl the edges of the flap for like purposes,

and when the bag or casing is closed it has the appearance of a hand purse.

The fiap 16 is held in closed position by .means of cnap or other suitable fasteners,

such as shown for example at 18, the male parts of which are secured to the short piece of material 11 forming the bag or casing,

l and which may, for convenience be referred at opposite ends.

to as the inner wall of the pocket 14. The female parts of the fasteners are secured to the flap 16, which is a part of the long piece of material 12 and part of which latter may, for convenience, be referred to as the outer Wall of the pocket 14.

When the {iap 1G is closed, the inner wall 11 of the pocket 14 has an elongated exposed portion 19 along its lower portion and by reason of the flap being tapered, said inner Wall has triangular exposed portions 20, 21, The short piece of mate rial or inner wall 11 of the pocket 14 is formed of canvas, duck, or other porous and absorbent material, while the long piece forming the outer wall of the pocket, designated by the numeral 22, and the flap 16 is made of moist-proof and preferably airproof material..

' The long piece of material serving as the outer wall 22 of the pocket and as the flap 16, is of duplexniaterial of the kind in which an outer layer 23 and an inner layer 24 is provided, one fastened to the other in any approved manner so as to form a unitar element or structure. The inner layer 24 1s absorbent in nature and consequently porous, While the outer layer is moist-proof and preferably airproof. v

While there are decided advantages in using a two layer material of the type men tioned,'or its equivalent, it is to be understood that certain advantages of my invention will be inherent in the bag or casing, as constructed, if a moist-proof material without the absorbent inner facing is used for the outer wall of the pocket and the flap, or for either.

The complete device, as shown-in Fig. 1, occupies comparatively little space and may be placed in a drawer or stored away in any position for use. It may be made in various sizes, and in large size may be used for sick room purposes in lieu of a hot-water bag. In its smaller sizes it may be placed in ones pocket for alleviating rheumatic pains, or.

for other purposes.

Owing to the fact that a portion of thel as the filling opening 6 is formed in the unfilled extending portion of the pad; but, if desired, the pad may be easily Withdrawn from the pocket preparatory to supplying the water.

' Aftery supplying the pad With water, it

may be kneaded, Within or Without the casing, such manipulation assuring contact of the Water with all portions of the commi nuted material Within, thus assuring quicker chemical reaction and consequently instant generation of heat. During the generation of heat, moisture will escape through, thewill reach the outerv surface of the flap 1b i of the bag or casing, nor the outerv surface of the outer' Wall 22 thereof, due to such lo parts being of moisture-proof material. Since the iiap 16 of the bag or casin'gcovers 'the ma'or portion of the inner wall, only the expose Vportions 20, 21 and 22 will be moist to the touch, and since the outer Wall 22 only t is to be placed in Contact Withl the part or` to the chemical composition Within the heatf ing pad or element assures prolonged and slovv evaporation of the moisture.

By constructing the entire inner Wall 11 of the pocket of anabsorbent or'porous Vmaterial and covering the 'major portion thereof with a moisture-prooff material, such as the flap 16 is constructed of, said inner Wall Will remain moist over a longer period of time than would otherwise -be possible, and such moisture maintained in contact with the heating pad or element greatly-prolimited area of surface'of said linner wall exposed tothe air assists in prolonging the period of heat generation, as this results in slotvevaporation of moisture'. f

inner surface of the outer Wall 22 isl faced or lined with an absorbent material or layer, as is the inner surface ofthe'ap 16, these parts becomeJ andremain moist, although escape of moisture through said wall and flap is impossible. y

rlhe bag or casing 10 therefore presents moistened walls -in contact. with opposite sides of the heating -pad or element and maintains the chemical composition Within the pad in a moistened condition over a maximum period. of time, assuring prolongedchemical reaction and consequent heat.

I After the, moisture is fully absorbed,gen eration of heat ceases, but a further supply of Water to the pad, any time aftei' being dried, will again set up a chemical reaction and consequent generation of heat; 'this being continued until the 'potentials of the ingredients become'exhausted, after which a may beuse vI claim is pad or element is positioned, but no moistureV v 'sack'being in contact with said absorbent longs the period of heat generation. Thel prising a chemical heatin pad havinga po- Moreover, by reason of the fact vthat theV and the other being of moisture-proof matenew pad. is used, or if desired,the same sack, with new in redients substituted for the old,

Having thus described my invention, what. 1. device of the character described," comprising a sack of absorbent material containing a chemical heating composition, and a casing enclosing .said sack and formed partly of-an absorbent material and partly T5` of` a moisture-proof material, all of said moisture-proof material and a part only of said last-mentioned absorbent material being exposed.- Y

2. A ldevice of the character described, comprising a sack of absorbent material con'- tainin heat generating material adapted to be moistened, and a casing enclosing said sack` and formed partly of a porous absorbent material having a limited exposed area and partly of a moisture-proof matey rial having a portion overlapping said porous absorbentmaterial.

3. A device of the character described, comprising a sack of absorbent material containing vmaterial adapted to generate heat under moisture, and a casing enclosing said'v f sack `and formed in part of a water-proof material .having an absorbent lining', said lining and absorbent material.l 4. A devicefofl the kind described, comprising a chemical heating pad, and a casing having a pocket in which said pad is inserted, one wall of said pocket being of porous material and the other of Water-proof material, said last-mentioned Wall having an extension serving as a flap to overlie a portion of said porous material.

5;-A device of the kind described,'com

proot` material, and a, flap of moisture-proof 12.0

'material extending` from said outer `wall and overlapping the major portion of said inner Wall.

7. A casing for-'a chemical heating pad-'- having moisture-proof walls forming part thereof and an absorbent wall partly covered by one of said moisture-proof walls and partly exposed. y

8. `A casing for a 'chemical heating pad having a. pocket, the `in n'er"vwall of said .130

pocket. being of poronsmaterial, the outer wall being' ot' moisture-proof material coextensive with said inner Wall, said outer wall having an extension serving as a flap 'and being folded over the open end of said pocket and onto said inner wall, said flap being of slightly smaller area than said inner wall and leaving limited areas. of said inner wall exposed.

S). A casing for a chemical heating pad having a porous Wall :it one side thereof and n' -inoisture-proof wall -atthe other side thereof.

10. A casing for a chemical heating pad having a porous Wall at one side thereof, a moisture-proof Wall at the othei` side thereof, and moisture-proof means to cover the major portion of said porous Wall.

11. A casing for a chemical heatingr pad having Walls whose inner surfaces are moisture absorbing, one of said walls having provision inherent therein for the escape ot' moisture from Within, and the other having an external moisture-proof portion.

. Tn testimony whereof I allix my signature HOWARD H. BAKER.

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