close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2132681

код для вставки
Oct. 11, 1938.
w. H. H. DAVIS ET AL
2,132,681
CHEMICAL HEATING PAD
Filed June 27, 1938
'
INVENTQRS
W/M/AM H H [M W5
LEO/V nmezn
B
'
_
Y @1244ATTORNEY
2,132,681
Patented Oct. 11’, 12938
UNITED STATES PATENT OFFICE
2,132,681
CHEMICAL HEATING PAD
William H. H. Davis and Leon Markel, San Fran
cisco, Calif., assignors to United States Ap
pliance Corporation, San Francisco, Calii’., a
corporation of California
Application June 27, 1938, ‘Serial No. 216,022
7 Claims.
(01. 132-362)
This invention relates generally to chemical
heating pads such as are suitable for permanent
hair waving operations, and to methods for their
manufacture. More particularly it is concerned
5 with the construction and manufacture of per
manent waving pads making use of an exothermic
chemical reaction for generating the requisite
heat required for a waving operation.
.
Small chemical heating devices intended to be »
end edges of the wrapper, and Fig. 4 illustrates
a second folding operation, whereby there is pro
duced an envelope enclosing the inner assembly.
Fig. 5 is a perspective .view illustrating the ‘
assembly of Fig. 4 while a predetermined amount 5
of chemical solution is being applied.
Fig. 6 is a cross-sectional detail on an enlarged
scale taken along the line 6—6 of Fig. 4.
Fig. 7 is a side elevational view illustrating the .
[0 used to generate a predetermined amount of heat, complete pad with the ?ap of the envelope closed.
Fig. 8 is an enlarged cross-sectional view simia
and then to be discarded, have come into wide
commercial use for the purpose of permanently ' lar to Fig. 6, but illustrating a modi?cation.
Fig. 9 is a side elevational view partly in cross
waving hair. As disclosed in Reynolds applica
section illustrating the manner in which my pad
‘tionSerial No. 176,229, entitled “Chemical heat
l5 ing pad for permanent hair waving”, one type of can beused in a permanent hair waving operation.
The pad construction as illustrated in the
device for this purpose makes use of an inner
?exible assembly, consisting of sheets of absorb- ' drawing consists generally of an inner assembly
I0, together with an outer wrapper l I. The inner
ent material in contact‘ with one or more sheets
of aluminum foil. At the time the pad is used assembly Ill can be formed as disclosed and
50 the inner. assembly is saturated with a chemical claimed in co-pending application Serial No.
solution capable of exothermic reaction with the ' 210,436, ?led May 27, 1938. Brie?y, a suitable
aluminum foil, and as applied to the wound hair ‘construction for the inner assembly i0 can con‘
the inner assembly is enclosed within a protective sist of a plurality of sheets of absorbent asbestos
wrapper. One characteristic of such a chemical paper lilb with'sheets I00 of aluminum foil inter
:5 Dad is that all of the water soluble chemical sup ' posed between the sheets of paper. The superposed sheets are passed through a suitable per
plied for the reaction, is contained within the ap
forating appliance whereby perforations [2 are
plied chemical solution. The pad assembly 'con
tains no reactive chemical whatsoever, except the formed'over the entire area of the sheets, in order
aluminum foil, and therefore it is totally inert to facilitate reaction of chemical solution with
the aluminum foil, and in order to facilitate ‘ready
30 before the solution is applied.
absorption of chemical solution._
'
It is an object of the present invention to pro
The outer wrapper ll preferably consists of a
vide a chemical pad of the above character, im
proved particularly with respect to the manner of sheet l3 of metal foil, having its inner surface
covered by the parchment or wax paper It. In
forming the protective wrapper, whereby applica
;5 tion of the chemical solution and use of the pad terposed between the outer wrapper Ii and the
inner assembly Hi we prefer to employ a sheet it
is greatly facilitated.
"
A further object is to improve upon the manner of absorbent paper, such as paper towelling.
_ In manufacturing pads in quantities the parts
in which the material forming the outer wrapper
is applied to the inner assembly, to form a self just described can be superposed asv illustrated
to retaining envelope, without the use of adhesive in Fig. 1. The next operation is to fold both the
10
15
20
25
30
35
40
~ ?at inner assembly Ill, and the outer wrapper I_l,
Further objects of the invention will appear along the common fold line [1. After making
this fold the parts appear as illustrated in Fig. 2.
' from the’ following description in which the pre
The next operation serves to fold over the pro
ferred embodiment of the invention has, been set
or supplemental retaining means.
’ ‘
5 forth in detail in conjunction with the accom- ‘ jecting end margins I8, in order to form the outer 45
wrapper into an envelope enclosing the folded '
panying drawing.
Referring to the drawing:
’
‘
_
Fig. 1 is a. perspective view illustrating the parts
of our pad, in its preferred form, before folding
inner assembly Ill. To produce a construction as
illustrated in detail in Fig. 6, we use a double fold
ing operation, that is, the end margins l8 are
folded over at least twice, The ?rst folding op- 60
Fig. 2 illustrates the. parts of our pad construcq - oration can be along the fold lines.l9, as illus
m of the same.
tion after one folding operation, namely the fold
ing of the inner assembly and the outer wrapper
~ sheet upona common fold line.
55
Fig.3;illustrates one folding operation of the
trated in Fig. 3, and the next folding operation
can be along the‘ fold lines 2|, to produce a com
pleted assembly such as illustrated in Fig. 4.
Thereafter the projecting ?ap 22 can be closed by 56
/
2
folding down on the fold line 23, to produce the
?nal marketable assembly packet \as illustrated in
Fig. 7.
'
liquid» I. Any liquid tending to escape or seep from
the inner assembly lkisabsorbedby-thepaper- 16.
It is desirable to employ asbestos paper in con
Instead of using such a double fold for the end
structing the inner‘ asembly ill, in order to avoid
margins l9, these margins can be rolled upon ' a ?re hazard.
Such a ?re hazard is involved not
themselves as indicated at 24 in Fig. 8. Which
ever method is employed there is formed, as pre
only because of the use of an oxidizing reagent
in the chemical solution, but also because in the
viously pointed out, an envelope from the outer
wrapper, and this envelope can bewopened to per
event a pad is not immediately applied to the hair,
10 mit access to the inner assembly, by swinging
sive internal heat attained can not‘, seriously burn
open the projecting ?ap 22.
_ I,
The pad is used with a chemical solution capa
ble of exothermic reaction with the aluminum
foil. It is desirable to employ a chemical'solution
15 containing a copper salt like copper sulphate, to
gether with an oxidizing agent such as sodium
chlorate, a salt like aluminum sulphate capable
of speeding up the reaction, and a salt like am~
monium chloride capable of controlling the hydro
20 gen ion concentration of the solution during the
reaction, whereby when the reaction is completed
the remaining solution is substantially neutral.
One solution which can be employed is as fol
lows:—
.
Grams
25
Hydrated copper sulphate _________________ __
after solution is introduced into the‘same, exces
or char‘ the inner asembly. The relatively small
amount of cellulose ?ber afforded by the paper
towelling IE, or by the parchment liner I4, is
insu?lcient to cause any appreciable amount of
charring or ?re hazard.
In addition to the attributes described above,
the double folding described, or the rolling of the
end margins l8, makes it unnecessary to employ
additional retaining means to hold the wrapper
intact while the pad is being shipped and used.
In other words such a construction affords a
stiil'ness for the end edges of the wrapper, and
a type of closure for the end edges which will
remain intact while the pad is being handled and
while the ?ap 22' is being opened and closed.
25
3
~ The’ construction of the pad, which affords an
Sodium chlorate _________________________ __ 17
open longitudinal edge, for introduction of the
solution as described above, is desirable from the
standpoint of convenience of operation. Also as
previously mentioned. because such introduction
of chemical solution causes’ initial flooding of a
Part of the aluminum foil. Such initial ?ooding
has been found advantageous in initiating chemi
cal reaction between the chemical solution and
Hydrated aluminum sulphate _____________ __ 1/2
Ammonium chloride--.‘ ____________________ "1/2
30 Suf?cient water to make 30 cc. of solution. '
A suitable solution such as referred to above is
supplied for use by the- operator, and constitutes
all of the chemical required for exothermic reac
tion
with the aluminum foil. When an operator
35
desires to use the pad for a hair waving opera
tion, the flap 22 is swung to open position substan
tially as illustrated in Fig. 5, and by applying‘
manual pressure to the two end edges of the pad,
the folded side portions Illa. of the inner assembly
40 ID are bulged apart. A. given amount of the
~ chemical solution is now introduced into a suit
able measuring appliance, such as a syringeili,
and the nozzle of this syringe is then introduced
» into the open edge of the pad between the» side
45
portions lBa of the inner assembly, and the solu
tion then discharged into the pad. The first effect
is to somewhat flood the interior of the pad, but
in a relatively short interval the solution is taken
up by the absorbent material of the inner assem
50
bly I0, whereby the solution is broughtinto inti
mate reactive contact with all exposed surfaces
of‘ the aluminum foil. The distended sides of the
pad are then forced together and after closing
down the ?ap 22, the'pad is bent over a curler 21
upon which hair has been wound (Fig. 9). As
will be understood by those skilled in the art this
curler may be mounted upon a suitable protector
28. The strand of hair is usually moistened with
a suitable Waving solution before the pad is ap
plied, and the pad can be retained in place by a
suitable-spring clip 29.
'
During a waving operation and, as the exo
thermic reaction proceeds between the chemical
solution and the aluminum foil of the inner as
sembly ill, some water vapor is generated within
the pad, and must be permitted to escape in order
to avoid internal pressure and resultant bulging.
With our construction such vapor may escape
70 from different portions of the pad, as for example,
from the folded or rolled end margins I8, although
the pad is adequately closed with respect to escape
of chemical solution. This is because the inter
posed sheet |6 of absorbent paper enables escape
~75 of vapor, without however permitting escape of
the aluminum foil.
We claim:
'
>
1. In a chemical heating pad for permanent
hair waving operations, an outer protective en
velope having a closure flap and an open longi
tudinal edge closed by folding down the flap, and 46
an inner assembly within the envelope adapted
to be moistened with a chemical solution for an
exothermic reaction, said assembly being accessi
ble for introduction of solution through said open
longitudinal edge.
45
2. In a chemical heating pad for permanent
hair waving operations, an outer protective en
velope having a closure flap and an open longi:
tudinal edge closed by folding down the ?ap upon
the body of the envelope, and an inner assembly 50
within the envelope adapted to be moistened with
a chemical solution for an exothermic reaction,
said inner assembly. consisting of sheets of ab
sorbent material in intimate contact with sheets
of metallic foil,vsaid metallic foil being adapted
for exothermic reaction with chemical solution.
3. In a chemical heating pad for permanent
hair waving operations, an outer protective en
velope having‘ a closure ?ap and a longitudinal
open edge closed by folding down the flap upon 60
the body of the envelope, and an inner assembly
within the envelope adapted to be moistened with
a chemical solution applied through said open
edge, said chemical solution being capable of an
exothermic reaction with said inner assembly,
said inner assembly consisting of a sheet of ab
sorbent material in intimate surface to surface
contact with a sheet of metallic foil, the metallic
foil being capableof exothermic reaction with
chemical solution, said assembly being relatively 70
flat and folded upon itself.
4. In a chemical heating pad for permanent
hair waving operations, an outer protective en
velope having a closure ?ap extending from one
longitudinal edge of the same, said longitudinal 75
3 .
2,182,681
edge of the envelope being "open when the ?ap
is extended and closed by folding down the ?ap
upon the body of the envelope, the opposite par
allel longitudinal edge of the envelope being
closed, an inner assembly within the envelope
adapted to be moistened with a chemical solution
lar in contour and consisting of a sheet of ab
sorbent material together with a sheet of metallic
foil in intimate surface ‘to surface contact with
the absorbent material, the metallic foil being
capable of exothermic reaction with the chemical
solution, and a protective wrapper sheet disposed
for carrying out an exothermic reaction, the open ' about the inner assembly, said wrapper consist
ing of a sheet of flexible material rectangular in
longitudinal edge of the envelope enabling appli
contour before being folded, and folded about the
cation of said solution, said inner assembly in
10
cluding a sheet of absorbent material in intimate inner assembly to form an envelope having an
contact with a sheet of aluminum foil, both said extending ?ap to close over one longitudinal edge
sheets forming a substantially ?at assembly, with of the envelope, the end edges of the envelope
the sheets doubled upon themselves, said assem-' being formed by a double folding of end margins
bly being disposed within the envelope with its of the wrapper material, thereby forming a self
15
fold line disposed adjacent the closed longitudinal
edge of the envelope and with the other longi
tudinal edge of the assembly substantially coin
cident with the open edge of the envelope.
5. In a chemical heating pad for permanent
20 hair waving operations, an inner relatively ?at
assembly consisting of sheets of absorbent mate
rial together with sheets of metallic foil, said
sheets being in intimate surface to surface con
tact, the absorbent material being adapted to be
25 moistened with a chemical solution capable of
exothermic reaction with the metallic foil,‘ a pro
tective wrapper sheet folded about said assembly,
the wrapper being folded first over one longitudi
nal edge of the assembly, the end edges of the
30 wrapper being folded at least twice to‘ form an
envelope, and the remaining ?ap being foldable
over the assembly to form the completed wrapper.
6. In a chemical heating pad for permanent
hair waving operations, an inner assembly capa
ble of being moistened with chemical solution for
carrying out an. exothermic reaction, said inner
assembly being substantially ?at and rectangu
retaining envelope.
.
‘
15
7. In a chemical heating pad for permanent
hair waving operations, an inner assembly capa
ble of being moistened with chemical solution for
carrying out an exothermic reaction, said inner
assembly being substantially-?at and rectangular 20
in contour and consisting of a sheet of absorbent _
material together with a sheet of metallic foil
in intimate surface to surface contact with the
absorbent material, the metallic foil being capa
ble of exothermic reaction with the chemical 25
solution, and a protective wrapper sheet disposed
about the inner assembly, said wrapper consist
ing of a sheet of flexible material rectangular
in contour before being folded, and folded abouti
the infier assembly to form an envelope having 30
an extending flap to close over one longitudinal
edge of the envelope, the end edges of the en
velope being formed by rolling the material of
the wrapper upon itself, thereby forming a sub
stantially self sustaining envelope.
'
,
WM. H. H. DAVIS.
LEON MARKEL.
85
Документ
Категория
Без категории
Просмотров
0
Размер файла
488 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа