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Патент USA US2136734

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Nov. 15, 1938.
Filed NOV. ZO, 133e
Stro: “cada
Patented _ Nov. ` l 5, l 938
, 2,136,734
Harry B. Denman, Birmingham, Mich., assignor
to Detroit Gasket & Manufacturing Company,
Detroit, Mich., a corporation of Michigan
Application November 30,1934, serial No. 755,483 _
2 claims.
The present invention relates to gaskets par
` ticularly useful in association with automotive
(ci. ess-_1)
by mixing together in a suitable rubber mill a
engines, but equally applicable for sealing all `rubber mixture comprising rubber and asbestos
or comminuted c'ork or both. To this is added
types of joints.
An important feature of the invention resides suitable vulcanizing and accelerating and acti
Vating ingredients as well understood in the art. 5
in its int'egral‘character, that is, the gasket con
sists of an integral layer >which is interposed The rubber mixture ai‘ter being prepared in the
rubber mill is extruded to »the form shown for '
between the joint surfaces, as for example be
example in Figure 1 or any4 desired size` and
10 vrequire the interposition of separate, i. e. un
shape; the rubber mixture also is formed into
connected superposed gasket layers-adjacent the sheets from which gaskets of suitable size and 10
joint surfacesas now required and customary shape will be cut or stamped, Where the ma
with certain types~ of carburetor manifold terial is extruded, the tube is cut olf to give pre
A further object of the invention is to provide
a gasket which may be formed to have a varied
determined desired thickness and, of course,
where the gasket is punched from a sheet, the
sheet will be controlled to the ~proper gauge or 15
range or coefficient of` flexibility and resiliency thickness. 'I'he unvulcanized body produced
varying from extreme pliability and resilience to either by extrusion and cutting or sheeting and
punching is indicated uin Figure 3 at I3. There
20 a hardness resembling hard rubber. The gasket ` is then placed on one or both sides of the core or
is possessed of high tensile strength and is re
body I3 a layer of gasket material I4, as shown
sistant to the action of rheat, Water, gases and'- in
detail in Figure _9 and which is `of the type
mineral oils; inother words to all of the _vari
ous infiuences surrounding'the normal operation shown and described in the United States Patent
1,776,140. This gasket materialv comprises a
of an internal combustion engine.
" '
layer of asbestos or other cushion material 20
Referring to the drawing,
Figure 1 isI a top elevation lof a representative upon both sides as shown or upon one side only,
gasket made in accordance with this invention. of a, layer of metal insert material I9. The in
sert material is provided with projections which
Figure 2 is a side elevation.
l are embedded in the cushion material as shown.
ents of the gasket shown in separated relation.` Referring to Figure 3, there is illustrated theL
superposed relation of the layer I4 and the layer
Figure 4 is a sectional view showing the com
or core I3. In the particular instance shown,
ponents of the gasket in position.
Figure 5 is a sectional View showing the finally
completed gasket.
two layers I4 are utilized.
` The unvulcanized core having the superposed
or surface layers I4 as shown in Figure 4 is now
Figure 6 is a side elevation of a modification. vulcanized under heat and
in a suitable
Figure 7 is'a sectional view of the gasket shown ` mold and there is produced apressure
homogeneous gasket
components in their super
>as shown in Figure 5. In the `vulcanizing oper
posed relation.
Figure 8 is a, sectional view of the ñnal product ation the rubber appears to ñow and‘forms a
skin I5 on the interior walls of the openings II,
40 and similar to Figure 5, an_d
35 `
' in Figure cA with i
Figure 9 is a sectional view of a layer of gasket
material made in accordance with the United
States Patent 1,776,140.
Referring to the drawing the numeral I0 indi-`
45 cates a gasket, for example, one suitable for use
I2 and on the side of the gasket, which skin ex- 40
tends in some cases slightly over upon the margin
of the gasket surface as at I6. This skin or
envelope is continuous `about the walls of the,
openings and the exposed edge of the gasket and
acts to bond the layers I4 to the core I3. In 45
between the carburetor and intake manifold of
the vulcanizing action results in sub
an internal combustion engine. The gasket has addition,
stantially integral adhesive union between the
f‘the opening II and rthe bolt holes I2. Other surfaces
of the layers I4 and the surfaces o1’ the
suitable sizes and shapes of gaskets are, of course,
50 employed at various points on the engine and the" core as at I'I, i. e., the layer I3 is vulcanized and
the layer or layers I4, as the case maybe, are 50
present view is purely illustrative. While the ` vulcanized to the-core. There is‘produoedthus a
gasket is particularly " designed for .automotive
substantially integral gasket having an inner
- use, it serves with.` equal success for sealing joints ‘
and relatively thick core vof rubber-asbestos or
of various types,
Referring to Figure 3, the gasket is produced
rubber `comminuted cork or -rubber-asbestos
cork, « and surface layers of metal combined 55
with .asbestos or other cushion insulating ma
terial. This gasket is resilient and ñexible as
required since these qualities of course are
easily regulable, in that a product having ex
treme pliability and flexibility can be produced
up to one which is substantially rigid and not
unlike hard rubber or a molded resin.
gasket is4 insulative since there is a substantial
percentage of asbestos present in the core and
10 since the layer Il includes an insulating ma
terial layer or layers as)described in the afore
said patent.
Referring to Figure 6, the core i3 is pro
duced by building up a plurality of relatively
15 thin layers I8 of a rubber mixture as hereto
fore described, to the desired thickness, super
posing thereon a layer or layers of gasket ma
terial Il as shown in Figure 7 and vulcanizing
to‘produce the integral product having a skin I5
20 shown in Figure 8, which is precisely like that
shown in Figure 5, the layers i8 assuming an
integral state.
All of the gaskets are characterized by- being
substantially integral in that the layers I4 are
adhesively united to the core throughout their
exteriorly as shown at I5. 'I‘his skin is important
inthat it completely seals the gasket both on the
exposed edges and the walls of the opening il
and bolt holes I2. Hence, with a continuousl film,
the possibility of disintegration or tearing or
rupture is completely avoided.
I may use as my cushion mate al asbestos,
asbestine, comminuted cork, syn hetic resin,
millboard or other similar insulating material.
The' various layers may be secured together 10
by grommets, staples, a cement or by vulcani
zation or other securing means.
Various modifications may be made in the
gaskets, all of which are comprehended in the
claims appended hereto.
I claim:
1. A gasket comprising a layer of rubber com
position having on one exposed surface, a layer
formed of a metal insert and cushion material
layers on each side thereof, said insert having 20
projections embedded in said cushion material
layers, the rubber composition layer and the
metal insert-cushion material layer being secured
2. A gasket in accordance with claim 1 in-
surfaces as shown at I1 by reason of vulcaniza
tion and a continuous smooth skin, ñlm or en
which a metal insert cushion material layer is
velope is produced extending about the entire
edge portions oi the gasket both interiorly and '
secured to each side of the rubber composition
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