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Патент USA US3041689

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July 3, 1962
H. J. TENNISWOOD
3,041,679
REFRIGERATOR AND FREEZER DOIOR CONSTRUCTION
Filed Sept. 29, 1958
2 Sheets-Sheet 1
BY
INVENTOR.
HOWARD J. TENNISWOOD
7'
ATTOR YGJEYS
I
>
July 3, 1962
H. J. TENNISWOOD
3,041,679
REFRIGERATOR AND FREEZER DOOR CONSTRUCTION
Filed Sept. 29, 1958
2 Sheets-Sheet 2
0
__:L ____ll ___________.
INVENTOR.
HOWARD J. TENNISWOOD
BY
ATTORNEYS
"ice
3,®4;l,?79
Patented Juiy s, 1962
2
3,041,679
REFRIGERATOR ANI) FREEZER DOOR
CONSTRUCTION
Howard J. Tenniswood, Adrian, Mich, assignor to Revco,
Inc., Deerfield, Mich, a corporation of Michigan
Filed Sept. 29, 1958, Ser. No. 764,061
8 Claims. (Cl. 20-35)
swingableedge of one form of a door constructed in
accordance with the instant invention;
FIG. II is a view of a temperature equalizing panel
employed in the form of door shown in FIG. I, a trim
edging being shown as partially removed from the tem
perature equalizing panel; and
,
FIG. III is an elevational view of the core of a refrig
erator or freezer door, a fragment of which is shown in
The cabinets of household food freezers formerly were
boxes with top opening doors. The boxes and doors 10 FIG. I, the door frame which normally surrounds the
door core being shown as partially removed.
both were heavily insulated. The freezers usually were
The insulating freezer or refrigerator door incorpora?
installed in basements or other out of the way places.
ing the instant invention, in the form disclosed herein, ’
They usually were packed with meat and other perisha
comprises a core 1 that is square as seen in front eleva~
ble foods which their owners obtained in large quantities
and stored in the freezers to be used over weeks or 15 tion, though the core may be of any' desired shape so
long as the front face is symmetrical about vertical and
months of time. In the construction of the insulated
horizontal axes. The core 1 comprises an inner shell
boxes ‘and top opening insulated doors much attention
member 2, which may be of metal or plastic, either ?at
was given to insure maximum prevention of ingress of
or molded or pressed into any preferred shape, and an
heat. Little attention was given to convenience in use
outer shell member 3 which also may be of metal or
and very little attention was given to attracive appear
3.1106.
plastic material and may be molded or pressed into any
preferred shape. In the form of device shown, the outer
In recent years, in the construction, merchandizing and
shell member 3 is flat with an offset margin 4.
utilization of freezers and refrigerators more emphasis
A door frame 5, which has a channel-like cross sec
was directed to convenience in use and attractive appear
ance. It became the practice to incorporate freezers with 25 tion and as shown in FIG. III is square in elevation when
assembled, surrounds‘ the inner and outer shells 2 and 3
front opening doors in the same cabinets with portable,
to form an enclosure that is ?lled with thermo-insulating
or “free standing,” refrigerators. This practice became
material of any desired type. Expandable polystyrene
general in urban areas where foods were acquired in
insulating material has been found to be eflicient and
smaller quantities and greater varieties. and were kept
otherwise suitable. The insulating material known in the
frozen by householders for shorter periods.
\
trade as expandible polystyrene consists of hard elastic
The present trend is strongly toward building refrigera
pellets. Similar rigid type insulating material of urethane
tors and freezers into the convenient and often beauti
also is available.
ful cabinet work and paneling with which modern kitch
As shown in FIG. I, the inner flange of the door frame
ens are lined. Building a freezer and a refrigerator into
a general scheme of kitchen wall cabinets and panels has 3 5 is surrounded by a ?exible gasket. The form of gasket
shown in FIG. I is fully described in a copending appli
many advantages. It enables the freezer and the refrig
cation and is not a feature of the instant invention, since“
erator each to be placed in its most convenient location
other forms of gaskets may be employed.
independently of the other. Each can be at such height
Secured by screws to one side of the door frame 5 are
that its contents are visible and accessible without stoop
ing or stretching. The refrigerating and freezing mecha 40 webs 7 forming part of a door pull 6 comprising a handle
8, the structure of the door pull being such that it can be
nism can be left out of the interior of the cabinets, thus
secured to the frame 5 only, ‘without interfering with
providing more space for food and leaving the food space
‘any other part of the door structure. The other side of
susceptible of better arrangement. The refrigerating or
the door frame 5 is provided with reinforcing strips 9 and
freezing mechanism when installed above or at the side of
a built-in refrigerating or freezing cabinet can be easily 45 If) that are threaded to receive screws 11 for attaching
hinges 12 and 13 to the door frame, thus securing the
and economically serviced or replaced. The built-in
refrigerator and freezer do not stand out into the room, .
hinges to the door frame onlypwithout interfering with
any other part of the door structure.
to be dodged around and cleaned around. If the doors
The side of the door frame 5 which carries'the rein
are custom-built, or the otherypaneling is custom-built
at the place of installation, the material of the doors and 50 forcing strip 10 is severed over the strip, the strip being
secured by ‘welding or otherwise to the door frame on one
the material of the other cabinet work can be made to
‘side only of the dividing cut. When the two sides of the
match or harmonize. Custom-built refrigerator doors
dividing out are brought together and the screws II are
and freezer doors are expensive, however. .
7
screwed into the plate on one side or'both sides of the
It is an object of this invention to provide a basic re
frigerator or freezer door core and interior functional 55 dividing cut to fasten the hinge 13 to the frame 5, the
frame closely‘ embraces the shell member 3 and cannot
be removed therefrom without taking out the screws 11.
accessories which can be readily assembled with the
When, however, the screws 11 are backed out and the
core to make a large variety of right or left hand doors
hinge 13 is removed, the door frame 5 c‘an‘be sprung
that differ in appearance and in aesthetic characteristics.
Another object is to make‘it possible to produce stand 60 open, as indicated in FIG. III, until the door frame can
liner in combination with invertible and interchangeable
ard factory-built refrigerators and freezers having the
advantages of custom~built refrigerators and freezers, at
be swung out of parallelism with the core 1 and removed
from the core. After removal from the core the doc
frame 5 can be turned over and replaced upon the core
_
1 with the door pull on the right side instead'of the left
~And still another object is to make it possible for
distributors and dealers with a small investment in in 65 side. The hinge 13 then can be replaced on the left side.
The door thus can be converted from a right hand
ventory to satisfy the various preferences of customers.
opening door to a left hand opening door.
Other objects and numerous advantages of the inven
It sometimes happens that cold spots develop onrouter
tion will becomeapparent upon perusal of the following
much lower manufacturing cost.
description as illustrated by the accompanying drawings, 70 shell members of ‘freezer and refrigerator doors, and
when the relative humidity of the room air is high mois~
'
ture from the ‘air is liable to condense on, the cold spots FIG. I is a fragmentary sectional view through ‘the
in which:
and detract from the appearanceof the door or even
3,041,679
cause the'householder to' think. that the freezer is not
~ functioning properly.
4
tween the door frame 5 and the trim edging 18. The
ornamental panel and heat equalizer sheet subassembly
Under some conditions the con- '
thus may be pried away from the door core at several
places by pulling out the snap fasteners 22. As shown
densation is so copious that water of condensation runs
down the face of the door and drips from its lower edge.
If the outer shell of such a freezer door is covered with an
in FIG. 11,’ the trim edging 18 is severed and can be
opened to permit the substitution of a different ornamen
tal panel. The subassembly then can be replaced upon
the door core by again pushing the snap fasteners 22 into
ornamental panel; heat may ?ow directly from'spots on
the panel to‘the cold spots in the outer shell of the door
thus causing cold spots to'form on the ornamental panel.
Even when an ornamental panel is spaced from the outer
the registering openings 23.
'
It is apparent from the foregoing disclosure that the
‘shell of afreezer door, heat may radiate from spots on
the ornamental panel across the air space to the cold
spots on the'outer shell until cold spots form on the orna
' mental panel. Elforts have been made to avoid the for
purpose and objects of the instant invention are achieved
in the'preferred form disclosed. It is to be ‘understood
that the form described'herein and illustrated by the
accompanying drawings is exemplary only‘ in that the in
mation of cold spots on ornamental panels ‘by interposing
vention includes other forms and modi?cations which
15
layers'o'f insulating material such as porous ?ber board
are ‘within the spirit and scope of this invention.
between the outershell of’ the‘door core and the orna
mental panel, but even in such cases heat ?ows through
the insulating material or board from the ornamental
panel to the cold spots on the shell member, causing wet’
spots‘to'appear on the ornamental panel.
In the device of my invention such spotting of orna
mental panels is minimized or avoided'by interposing va
I claim:
'
1; In a door for an insulated cabinet, in combination;
‘a door core having an outer shell; an ornamental panel;
a heat equalizer sheet of thermo-conductive material;
means mounting said ornamental panel in juxtaposition
with said equalizer sheet on said door core; and a plu
rality of nubbins holding said heat equalizer sheet spaced
temperature equalizer between the ornamental panel 14
from said outer shell.
2. In a door for an insulated cabinet, in combination;
and the shell 3. The temperature equalizer consists of a
sheet of a'heat conductive metal '15 which lies in direct
contact with the ornamental panel 14 but is' spaced from
the shell-3. The thermo-conductive sheet 15 is reinforced
‘at its edges by turned-over strips 16, and is held away
from the shell 3 by spacing nubbins 17.v The nubbins 17
can be punched from the metal of the temperature equal—
~izer sheet 15 as shown in the drawings, or they‘can be
a door core having an outer shell; an ornamental panel;
a heat equalizer sheet of thermo-conductive material;
meansmou'n-ting said ornamental panel in juxtaposition
.with said equalizer sheet on said door core; and a plu
rality of nubbins holding said heat equalizer sheet spaced
from said outer shell; said mounting means comprising
a resilient edging trim having a C-shaped portion and a
bead which is sprung over the edges of said ornamental
panel and said equalizer sheet to hold them in a sub
composed of thermo-insulating material.
Employing a sheet of thermo-conductive metal to pre
' vent heat'fr’om ?owing directly fromspots on the orna
assembly.
‘
mental panel 14- to spots on the shell 3 may appear to 35
3. In- a door for an insulated cabinet, in combination;
be a rather paradoxical way of accomplishing the pur
a door core having an outer shell; an ornamental panel;
pose. It accomplishes the purpose, however, not 'by
a heat equalizer sheet of thermo-conductive material;
blocking the ?ow of heat but by taking from a large area
means-mounting said ornamental panel in juxtaposition
of the ornamental panel 14 heat which otherwise would
with said‘equalizer sheet on said door core; and a plu
be abstracted from a de?nite spot; The total heat loss 40 rality of nubbins holding said-heat equalizer sheet spaced
vfrom the‘entire ornamental panel maybe no less than it
from said outer shell; said mounting means comprisinga
would have been in the absence of the temperature equal- H resilient edging trim having a' C-shaped portion and ‘a
r-izer sheet 15, but the equalizer sheet tends to get from the
bead'which is sprung over the edges of said ornamental
entire area of the ‘ornamental panel the heat which it ~ panel and said equalizer sheet to hold them in a sub
iradiartes to superchilled places'on the‘outer shell 3. It
assembly; said edging trim having a ?ange carrying fast
‘thus, prevents ‘the temperature of any spot of the orna
eners to releasably secure said ?ange to said door core.
4. ha door foran insulated'cabinet, in combination;
mental panel 14 from being reduced su?iciently to cause
a door core having an ,outer shell; an ornamental panel;
The ornamental panels 14 are capable of being selec
a heat equalizer sheet of thermo-conductive material;
sweating.
‘
V
.
.
tively subassembled with the heat equalizer sheet by
'means mounting said ornamental panel in juxtaposition
means of a trim edging 18 as shown in FIG. I.
with said equalizer sheet on said door core; anda plu
The trim
edging '18 is'formed with an outer:O-shaped portion 19
and an inner bead 20' which resiliently grip the edge of
rality of nubbins holding said heat equalizer sheet spaced
from said outer. shell; said mounting means comprising
the ornamental panel .14 and the edge of the‘temperature
equalizer sheet 15,. When the lit-shaped portion 19
55
and the head 20 are sprung into gripping engagement
with the edge of the ornamental panel 14 and the rein- . .
forcing strip 116 of the sheet 15, they hold the panel 14
and the temperature equalizer sheet 15 ?rmly vtogether.
The trim edging 18 has a ‘?ange 21 that extends in
wardly beyond the head 20. Projecting backwardly
,-through the ?ange 21, are snap fasteners zziwhich, to
secure the ornamental panel 14 and heat equalizer sheet
an edging trim which is forced over the edges of said
ornamental panel and said equalizer sheet to hold them
in 1a subassembly and snap fasteners for holding said
subassembly to said door core.
5. In a door for an insulated ‘cabinet, in combination;
a door core consisting of an inner shell member and
"an outer shell member; a door frame, channel-shaped
in cross section; said shell members and said door frame
having a front eleva-tionjwhich is symmetrical about verti
cal and horizontal axes; said door frame adapted to
15 to the core 1, are forced into registering openings 23
perimetrically surround said shell members; said door
in the door frame 5 and the outer. shell memberZS. 65 ‘frame having 'a' dividing cut on its perimeter to enable
.,Each ‘ofthe snap fasteners 22 has a head 251which lies
assembly around said shell members; removable securing
7
21- of the trim
edging
18 and the,
between’ the ?ange
7 H
V
' ‘reinforcing strip 16 7 of the heat equalizer sheet 115. 'The
snap fasteners 22'have bowed resilient prongs 26 which
7 . are squeezed toward each other as the fasteners are forced
through the registering openings 23}, and which spring outéj
wardly after the bowed portions of the prongs have passed
inwardly through the. registering openings.
I
,
.
To remove‘ the ornamental panel 14 and the heat
driver may bejinse'rted be
" equalizer sheet 115, " a“ screw
means for bringing together and securing said ‘dividing
cut; said inner and outer shell members and'said door
frame when assembled forming an enclosure for insulat
70.ing material; said door frame having a door pull at
tached to one sidethereof and hinges attached to its
, other side; said ‘door frame‘ upon removal of said securing
means beingseparable from said shell members and when
75 so separated and reassembled, in an'inverted position with
5
3,041,679
respect to said shell members changing a right hand open
ingdoor to a left hand opening door and vice versa.
6. In a door for an insulated cabinet, in combination;
a door core consisting of an inner shell member and an
outer shell member; a door frame adapted to perimetri
cally surround said shell members; said door frame having
a dividing cut on its perimeter to enable ‘assembly around
said shell member; removable securing means for bringing
6
sheet spaced from said outer shell member; said mount
ing means comprising a resilient edging trim having a
C-shaped portion and a bead which is sprung over the
edges of said ornamental panel and said heat equalizer
sheet to hold them in a subassembly.
8. In a door for an insulated cabinet, in combination;
a door core consisting of an inner shell member and
an outer shell member; a door frame adapted to peri
outer shell members and said door ‘frame when assem 10 metrioally surround said shell members; said door frame
having a dividing cut on its perimeter to enable assembly
bled forming an enclosure for insulating material; said
around said shell members; removable securing means
door frame having a door pull attached to one side there
for bringing together and securing said dividing cut; said
of and hinges attached to its other side; said door frame
inner and outer shell members and said door 8frame
upon removal of said securing means being separable
when
assembled forming an enclosure for insulating ma
from said shell members and when so separated and re 15
terials; said door frame having a door pull attached to
assembled in an inverted position with respect to said
one side thereof and hinges attached to its other side;
shell members changing a right hand opening door to
said door frame upon removal of said securing means be
a left hand opening door and vice versa; an ornamental
ing separable from said shell members and when so
panel; a heat equalizer sheet of thermal-conductive metal;
separated and reassembled in an inverted position with
means mounting said ornamental panel in juxtaposition
respect to said shell members changing a right hand
with said heat equalizing sheet on said door core; and
opening door to a left hand opening door and vice versa;
a plurality of nubbins holding said heat equalizer sheet
and ornamental panel; a heat equalizer sheet of thermal
spaced from said outer shell member.
conductive metal; means mounting said ornamental panel
7. In a door for an insulated cabinet, in combination;
in juxtaposition with said heat equalizer sheet on said
a door core consisting of an inner shell member and an 25
door core; and a plurality of nubbins holding said heat
outer shell member; a door frame adapted to perimetri
equalizer sheet spaced from said outer shell member;
cally surround said shell members; said door 'frame hav
said
mounting means comprising a resilient edging trim
ing a dividing cut on its perimeter to enable assembly
having a C-shaped portion and a bead which is sprung
around said shell member; removable securing means
the edges of said ornamental panel and said heat
for bringing together and securing said dividing cut; said 30 over
equalizer
sheet to hold them in a subassembly; said
inner and outer shell members and said door frame when
edging trim having a ?ange carrying ‘fasteners to re
assembled forming an enclosure for insulating material;
leasably secure said ?ange to said door core.
said door frame having a door pull attached to one side
thereof and hinges attached to its other side; said door
References Cited in the ?le of this patent
frame upon removal of said securing means being sepa 35
UNITED STATES PATENTS
rable from said shell members and when so separated
and reassembled in an inverted position with respect to
2,551,160
Rehrig et a1. _________ __ May 1, 1951
said shell members changing a right hand opening door
2,552,641
Morrison ____________ __ May 15,v 1951
together and securing said dividing cut; said inner and
to a left hand opening door and vice versa; and orna
mental panel; a heat equalizer sheet of thermal-conductive 40
metal; means mounting said ornamental panel in juxta
position with said heat equalizer sheet on said door core;
and a plurality of nubbins holding said heat equalizer
2,780,845
Chapman et a1. _______ __ Feb’. 12, 1957
2,839,793
_ Fields _______________ __ June 24, 1958
440,578
Great Britain ________ __ Jan. 2, 1936
519,845
1955
FOREIGN PATENTS
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