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Патент USA US2399628

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Ma? 7„41946„
Filéd April 19, 1945
2,399,[email protected]
2 Sheets-Sheet l »
Filed April 19, 1943
2 Sheets-Sheet___2
i Patentedl May Ú,
" UNITED s'rA'rEs2,399,628I
assigner to Misha
'Rubi' à Woolen
Manufacturing Company, Mishawoha, lind.„ a
Marion Morgan Cunning, South t* :s
corporation oil
«i t t n
Application April ld? i943, Serini No. [email protected]
ti se or sooo
any ci the advantages thereof.
lin the accompanying drawings:
The present invention 'relates to mattresses,
and particularly to combined inner spring and
nge rubber mattresses.` The invention, in gen
eral, aims to provide a highly serviceable e d
sponge rubber
pad withbya spring
unit or
a io
Fig. ll is u perspective view of one form of mat
trees embodying features oi the present inven
tion shown suppo
on. a conventional box
ioundation or beadstead;
lädt’. 2 is a partial perspective view. on a larger
or’ the mattress seen in Fig. 1, showing the
ille obiect of the invention is to provide
mattress cover or tic
opened at one end, as
» u
ttress oi the chnracter indiceted, inclu
'v a
insertion or withdrawaloi the spring unit;
ent spongy rubber body supporting eie liti torFig.
d is an end elevation, looking at the mat
ent or pad,` n spring assembly
d e, severine
tress oi Figs. l. and 2 .trom the right-hand end
r thereior, which may bey easily dis
made up of a number of coil springs. y
thereof, with parts in section;
neeebied when it is denied to substitute other
its oi greater or lesser resiliency, or
wäen thas pad end ticking is to be washed and/or
Y 1
ii is n transverse cross section, as on th
liti' line t-t oi Fig. l. showing the mattress de
pressed as when supporting a person and also
er obiect is to provide a mattress con
struction which permits air to rmeate
oi its
walls for thorough and continuousventilation. d
ther object is to provide separate but united
iabric compartments ici' the pad and springs, so
in eievetion the upper portion of the box
sp ‘ tu ioundntion;
Fig. o "is e, fragmentary vertical section on a
larger scale showing the attachment of tape to
' the foam rubber pad for the securing of the tici:u
ing thereto;
that the pad may be anchored to the springs vet -
Fig. d is a fragmentary vertical section through
the pad on the scale of Fig. 5 showing the manner
may be easily removed therefrom, along with the
25 oi' securing it to the fabric envelope or ticking
Other objects are to unite the metallic u ivi
with soft foam rubber in such a way that th
foam rubber cmmot be torn or cut by ordinary.
usage; to protect the user under all conditionsA
which encloses the springs; and
Fig. "i is an end elevational view, partly in sec
tion, sho
a modiñed form of mattress wherein
e i units of diil'ering supporting power are
from contact with the spring unit; to provide a i so
in general, the present invention, according to
mattress of _pleasing appearance so that it is
readily salable; to facilitate sliding the spring
an important aspect thereof, comprises an envel
oping casing or mattress ticking in an upper por
unit in and out oi the fabric compartment; and
tion or >compartn'nent of which is secured prefer
to provide a mattress which may be sold at n
35 ably in a more or less permanent fashion, a pad
or body supporting member of sponge rubber.
Still another object of the invention is to pro
Such pod is preferably of the type molded of an
vide, in a mattress having a spongy rubber body
aqueous dispersion of latex which has been
supporting member, an arrangement utilizing a
whipped into a foam in the presence of „a froth
plurality of spring units of differing tension,
strength or supporting power whereby the mat 40 ing agentl or which has been combined with a
separately prepared foam, and generally contains
tress, and particularly the upper part thereof,
hasample compressibility and resilience accom
internal cavities formed in the molding operation.
panied >by a high hysteresis value as a whole, ir
' Underneath the >seid pad the ticking is formed,
respective of the particular type of covering or 45 substantially throughout its area, with a. sepa
rate compartment into which is inserted a set
or assembly of coiled springs, preyerably of a
4ticking employed.
With these and other objects in view theïin
vention resides in the construction, operation and
novel combination and arrangement of parts
hereinafter fully described, illustrated in the ac
type commonly employedin so-calle' inner spring
_' mattresses; At one end of the spring compart
~ mentthe ticking walls are divided or slitted to
afford an opening for the ready insertion or re
companying drawings and particularly pointed
moval of the spring unit, and are provided with
suitable fastener elements to maintain the open
ing closed when the spring unit is within the com
out inthe appended claim, it being understood '
that various modifications may be made in the
form, proportion and minor details and arrange« t
ment of parte. within the scope of the claim,
without departing' from' the spirit of the inven
According to a further aspect of the invention
the ticking with contained rubber pad may be
provided with two lower compartments for the
reception of two individual spring units which,
preferably, may have differing characteristics as
to stiffness, supporting power, and the like. In
this aspectI of the invention the ticking is pref
erably provided with an opening or openings for
the ready insertion and removal of the springs.
The latter feature, however, -is not necessarily an
_essential component, since the providing of a
mattress comprising a sponge r'ubber pad and a
pair of springs of differing characteristics, all en
closed within an enveloping ticking, is deemed
to constitute a novel and important aspect of the
the foam rubber pad that yields with the pad
when the latter is compressed but is otherwise
practically immovable relative to the pad.
To provide an envelope, casing or compart
ment for the spring u?it,_heavy cotton duck or
other porous fabric walls 23 are attached along
their upper margins, as by stitching @24, to the
cover sheet I9 and tape 22, Fig. 6, thus securing
the pad Iii and its covering to the compartment
10 enclosing the spring unit.- Walls 23 may be in
tegral with or sewed along a seam 25 to a bottom
fabric wall 25a which completes the envelope or
casing, there being four walls 23 which provide
two side walls and two end walls.
present invention, irrespective. oi’ whether the 15 At one end of the envelope the material of the
spring units are readily removable from the tick
end wall and the adjoining side walls is slitted
ing or are substantially permanently incorporat
or divided, as at 26, to make an opening large
ed therewithin.
.enough to admit thespring unit I 0 endwise, if v
In accordance with a preferred form of the
the spring unit is compressed as illustrated in
invention, I employ a coil spring unit I0 of con 20 Fig. 2, and suitable fastening elements, such as
ventional construction embodying heavy mar
snap fasteners 21, may be employed to seal the
ginal or frame rods or Wires II, coil springs I2
opening (see Fig. 1) when'the spring unit is in
and tie wires I3 connecting the coil springs to
side the envelope. It will be appreciated, of
each other and to the marginal ~wires II. The
course.' that the opening 26, preferably, will be
latter are preferably covered with suitable pad 25 so constructed that the fabric forms overlapping
ding material IIa for‘the purposes of comfort
lips for proper operation-of the fastening ele
and the prevention of damage to the ticking or
ments, as clearly seen in Figs. l and 2.
casing presently to be described. Such a unit is
The height or width of walls 23, preferably, is
extremely flexible, in' fact it will yield in every
such that the spring unit is somewhat compressed
direction, and it is excellently adapted for sup 30 . throughout its area when it is within the envelope.
porting a foam rubber pad if the pad is prop
Thus the walls 23 are maintained under tension
erly anchored and adequately protected. against
except when the mattress is supporting a load
the cutting'or tearing action of the upper ends of
as shown in Fig. 4. The reaction from the com
coil springs I2. It will be understood that foam
pression oi' the spring unit tends to hold the
rubber is extremely soft and does not have a 35 heavy wire frames I I in the inside corners formed
great deal of strength, but because of its lcom
pressibility and low internal friction, and for
at the upper and lower margins of the side and
end walls, as' seen in Figs. 3 and 6.
other reasons known to those skilled in the art,
Wh'en it is desired to separate vthe spring unit _
it is highly desirable for use in mattresses.
I0 from its envelope, the fastening means 21 are
The foam rubber pad I4 (Fig. 3 et seq.) may 40 separated and the opening 26 is spread apart ,
be from one to two inches in thickness and pref
whereupon the envelope or ticking', and contained
erably is both wider and longer than the spring
rubber pad, may be drawn off the spring unit, as
unit, so that when assembled with the spring
will be clear from Fig. 2. When inserting a spring
unit it overhangs the marginal wires II on all
unit, the cotton or other padding II a which cov
sides by about one inch. All the edges of the 4.5 ers all of the marginal wires II will facilitate
pad are made more flexible by being beveled both
sliding the unit, and the fabric sheet I9 on the
from the top and from the bottom, as best shown
bottom of the pad I4 cooperates in making the
in Figs. 5 and 6, said beveling being indicated at
introduction of the unit, ev'en though under com
I6 and I1 and obviously comprehendlng the over
. pression, aA relatively easy operation.
' hanging portion of the pad. On the underside, 50 spring units of- different resiliencies or load-ca
the pad- I4 has a large _number of preferably cup-Í
pacities may be substituted at any time for the
shaped recesses or cavities lIii not only to increase
unit I0 in a mattress of t'he invention to adapt
the compressibility of the pad, but also to insure
the mattress to the comfort or whim of the user.
adequate and continuous ventilation thereof, as . _Thus the invention is especially valuable for use
will be explained. The described pad must be
in hospitals, hotels and wherever the public is
protected by a cloth casing, to which it should be
particularly catered to. When maximum com
secured immovably without interference with
fort is desired, as in a hotel, the mattress will be
flexing of the pad, and toA this end a heavy cot
supported probably on box springs 28 of conven
ton duck or other porous cloth sheet I8 is
tional form (Figs. 1 and 4). Of prime impor
stretched over the top of the pad, while a sim 60, tance, however, is the fact that the described
ilar or even heavier fabric sheet I8 is stretched
removable envelope, and contained pad, may be
over the bottom of the pad. both sheets I8. I9
readily removed from the spring unit and washed
being stitched together, as indicated at 20, out
and sterilized as a unit, without any injurious ef
side the thin edge provided by bevelingv I _8, I1.
fect, and this feature is obviously of the greatest
Cloth tape 2| may be secured‘ over the'seam by
importance in hospitals and asylums.
the stitching 20 to make a better appearance. To
Another feature of the invention is the extra
y anchor the sheets I 8 and I9 to the pad. a rub
berized tape 22, cemented or vulcanized to the
foam rubber pad along the lower beveled edge I1,
may be secured by the stitching 20 to the upper
and lower sheets, the lower sheet I 9 being outside
of tape 22 as Vshown in Fig. 6. Tape 22 of course
.extends all around the pad and affords a very l
strong anchorage for the upper and lower cover
' sheets, which thus provide» a compartment .for
ordinary provision .for thorough ventilation lof
the mattress. The foam rubber itself is essen
tially a mass of intercommunicating air cells
formed in vulcanized latex, and it permits con
tinuous circulation of air; a circulation which is _
not impeded by the porous fabric layers I8 and
I9 which enclosevand protect the foam rubber.
The Iside walls 23 of the lower compartment
where the spring unit is contained are likewise
’ .3
porous, and the spring unit itself is o! very open
construction, so that Ventilating convection cur
rents may. continuously enter` and leave through
the side walls and may also pass up through the
fabric _I8 and pad I4, or downwardly through the
pad, as Vdetermined 'by the temperature oi the
room, etc. The cavities-I6 play an important
part in Ventilating . the mattress,- as the cavity
walls are collapsed by the weight of a body lying
on the mattress, and the extent of collapse oi the
walls of each cup-like recess or cavity I5 depends
upon the weight or compressive stress imposed
foam rubber against the tearing’or cutting -action
of the upper ends of the coil springs I2, and as
, previously stated, assists in facilitating sliding of
»thespring'- unit into its envelope or compartment.
‘A further'function oi'-v ¿sheet I9 is to cooperate
with the foam rubber in insulating the coil springs,
which, being of metal, will' draw ofi body heat
rapidly in a cold room.
Desirably the spring .unit is so made that the
coil springs in the center are slightly higher than
those at the margins adjacent wires il. This
`causes the spring unit- to have a slight crown or
convexity which is imparted to the top oi the
rubber pad when the mattress is assembled, as
. on that part of the pad Il. The body of a person
lying on a mattress is constantly shifting or
' changing its position, and with every movement
of `every limb, with every turnof the head orl
trunk, the walls defining some of the cavities it
are deformed and compressed or are relieved of
pressure, the result being a continual compression
best shown in Fig. 3.
Thus the mattress'has a '
better appearance and is more readily sold.
In Fig. 7, as previously indicated, there is` shown
¿a Vmodification of the present invention, wherein
` -`two spring units. of didering characteristics are`
l of air in the different cavities, followed by relief 20
ln this form there has been shown, ‘
for purposes of illustration, the same, type oi in
of such compression as the air seeps through the
` tegrated envelope or tic, and contained sponge '
porous fabric It covering the openings in said
rubber pad, as previously described. rl‘hus there
cavities. The sudden compression oi air in any
is seen the pad it, with its enveloping cover layers
cavity also causes some of the air to be forced
through the intercommunicating air cells ol the 25 it and it, the depending walls it, and the bottom
the said walls accoun
roam rubber pad and thus ventilation of the padl . wall tta, the space wit
modatlng a pair ol springs as will presently be
itseli, which normally takes place very slowly ‘but
described. The end wall, seen partially in eleva
continuously, is accelerated by normal use oi" the
tion, is preferably provided with a mouth or open
lt will be understood that the ventilat
' mattress.
adapted to he normally maintained closed
-ing aircurrents which constantly pass through the
by the fasteners tl, in the manner and tor the
v mattress oi the invention are entirely unnotice
purpose previoy described.
able and do not in any way detract from the oom
in the presentpinstance the vertical length of _
i-"ort oi the user. On the other hand adequate
ventilation oi' the mattress will usually enhance 35 the side and end walls iii is somewhat greater
than in the nrst described io ci the invention,
the conilort oi the user. especially in hot weather,
thus providing an enclosed space below the pad
as will he understood without further description.
le the cavities or recesses lb are distributed
uniformly over the greater part of the area of
the underside of the loam rubber pad, as best
shown in, rigid there is an area adjacent the
marginal wires I i oi the spring unit where the
loam rubber pad has no cavities and hence odors
adequate padding for the wires Il, which would
be very uncomfortable if felt through the pad.
“ I; en one sits on the side ofthe bed, the project
ing or overlapping portion of the pad will bend or
i’old down, again to prevent discomfort from the
Wires I I. This downward bending or folding takes
place more readily because of the bevellng It and
vlll oi the edges of the pad. said beveling making
`the pad edges much more ñexible.
iii ci substantially greater depth. This enclosed
A space'is divided by a horizontal fabric partition
' iii, which may be stitched or otherwise attached
along its margins to the walls it, into two super
posed compartments iii and lit, each. of which is
adapted to accommodate a separate individual>`A
coil spring unit, as indicated by the numerals
di and it. Thus it is possible --to provide the
mattress oi’ Fig. 'i with a; pair oi springs oi’ aider
ing characteristics, and this end may be accom
plished .by having the compartments ti and il
ci substantially equal depth and utilizing, in
one compartment, a spring unit of heavier con
struction or gauge'than that employed inthe
However, I prefer to so construct the ticking
When a person lies down on the mattress, the
that the depth or thickness'oi’ the upper com
top pad cover I8 will be depressed (Fig. fiiwith
concomitant compression of the foam rubber pad, 55 pertinent di is materially greater than that of
theY lower compartment 32, to snugly accommo
and as pad cover I8 tits smoothly over the top
Asurfaceot the pad, central downward depression
of pad cover I8 will cause a tension in the pad
»cover adjacentboth side'edges and, this vtension
will lift the beveled edges of the foam rubber-
pad and will tend to pull said edges inwardly.
The pad and its covers I8 and I9 areA free to move
inwardly relative to the upper 'marginal wires il
- because they are not fast to said marginal wires,
date spring units of corresponding ' depth or_
thickness. Accordingly; l have constructed a
highly desirable mattress wherein the upper
compartment t! encloses, under slight compres~
sion, a coil spring unit approately six inches
in thickness, and the lower compartment el con
tains, also under slight compression, a coil spring 4
unit of about four inches inthickness; an over
all spring height oi. about ten inches.
and with slight downward movement oi’ .either of 65 One advantage of such an arrangement is that
the upper marginal wires lI, responsive to com
the upper spring unit may be vof a fairly readily
pression, the side wall 23 may slide over‘the wire
depressible nature so as to respond easily to de
II and follow the pad in its inward movement. „~
pressive forces and thus contribute factors of
As soon as the compression is relieved, the pad,
softness and comfort, while the lower unit may
pad covers and sidey walls are restored to their
have a' stiffer, 'stronger spring action so as to
normal positions, Fig. 6. The described action
aiïord a firm foundation and 4prevent or mini- e
enhances the sleeping qualities ofthe mattress.
The strong duck or other'heavy fabric' sheet I9,
besides cooperating in holding the padagainst
shifting, provides substantial protection for the
mize sagging tendencies. Since the lower spring
unit .Il is not required or -desired to yield down
wardly to the extent necessarydn the case of the
upper unit 33, the former may be of relatively
small depth as compared with the latter.
`Thus, it will be readily appreciated that the'
nection with certain types of spring
provision of a mattress having a surface or top
pad of sponge rubber and an underlying assem
changes and modincations may be
bly of spring units of differing supporting cher
units and pads might be used, and various
de without
departing 'from thel principles of my invention,
the scope of which is to be determined by the
acteristics, all enclosed within an integrated en
velope or ticking, constitutes, in and of itself, e,
novel and advantageous contribution to the ort.
Accordingly, while this arrangement has been
shown in e; ticking equipped with the desirable
. feature of the spring removal opening 2t, it will
be understood that the ticking, with sponge pad
trate upper and lower` compartments, o îlet coil
“spring assembly in the lower compartment end
top layer, may completely envelope the duel or
superposed spring assembly and be stitched sub
ment and extending marginally outward beyond
stantially permanently thereeround, devoid oi’
any slit or opening. correspondingly, the inter
nal partition 3i] may be omitted, although it is
a certain kind of foam rubber‘paci, other spring
appended claim.
'What I claim is:
A unitary composite spring,r and pod mattress
structure comprising a fabric envelope with sep
a flat spongy rubber pad in the upper comport
the surrounding wall of the lower compartment,
and an attaching strip or fabric extending
oround the spongy rubber pad end edhesively
secured to the underside of the outwerdly erb
generally advisable to employ a layer of fabric,
such as burlap or the like, between the lower face 20 tending margin thereof, said attaching strip be
ing secured along its outer margin to the periph
of the upper spring unit t3 and the upper face
ery of the upper compartment and elong its in
of the lower unit 34 in order to prevent the noise
ner margin to the top oi' the surrounding wall of
and wear which would otherwise occur incident
the lower compartment.
to relative movement between the said faces.
While I have described my invention in con
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