U.S. patent number 3,915,304 [Application Number 05/495,561] was granted by the patent office on 1975-10-28 for heat insulated food retainer.
Invention is credited to Daniel Pasco, Rosario Pasco.
United States Patent |
3,915,304 |
Pasco , et al. |
October 28, 1975 |
Heat insulated food retainer
Abstract
A heat insulated food retainer is described which includes an
outer protective box, of wood, plywood or the like, with a
reflective metallic lining to reduce heat transfer, the box having
in the interior thereof and beneath a metallic reflective top
sheet, a stack of horizontal sheets of newsprint paper with one or
more vertical openings, preferably die cut each to receive a
complementally shaped pot, preferably a cook pot, the bottom of the
pot preferably resting on a reflective metallic sheet which is
spaced above the bottom of the box by a stack of horizontally
disposed sheets of newsprint paper. The contents of the pot, if
hot, are retained in hot condition or, if cold, are retained in
cool condition, for an extended period of time.
Inventors: |
Pasco; Daniel (Philadelphia,
PA), Pasco; Rosario (Philadelphia, PA) |
Family
ID: |
23969103 |
Appl.
No.: |
05/495,561 |
Filed: |
August 8, 1974 |
Current U.S.
Class: |
206/545; D7/605;
220/592.21 |
Current CPC
Class: |
A45C
11/20 (20130101); B65D 81/3834 (20130101); B65D
2577/043 (20130101); B65D 2577/042 (20130101) |
Current International
Class: |
A45C
11/20 (20060101); B65D 81/38 (20060101); B65D
77/04 (20060101); A45C 011/20 (); B65D
025/02 () |
Field of
Search: |
;206/545,541 ;229/14H
;220/17,9D,9M |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Summer; Leonard
Attorney, Agent or Firm: Wobensmith, 2nd; Zachary T.
Wobensmith, III; Zachary T.
Claims
We claim:
1. A heat insulated food retainer comprising
a box having a plurality of vertical walls and a lid hinged thereto
for closing the top thereof,
each of said box and said lid having a lining of reflective
material, and
an insulating structure within said box comprising
a horizontal top plate spaced downwardly from the top of said box
and having a vertical opening spaced from said walls,
a stack of horizontal sheets of paper extending downwardly from
said top plate and having a vertical opening aligned with the
opening in the top plate,
an additional stack of horizontal sheets of paper disposed below
said first mentioned stack with a separator interposed between said
stacks, and
a metallic pot removably inserted in said opening in closely spaced
relation therein.
2. A heat insulated food retainer as defined in claim 1 in
which
said top plate is secured at its marginal edges to the interiors of
the vertical walls of the box.
3. A heat insulated food retainer as defined in claim 1 in
which
said first mentioned stack comprises sheets of newsprint paper.
4. A heat insulated food retainer as defined in claim 1 in
which
said additional stack comprises sheets of newsprint paper.
5. A heat insulated food retainer as defined in claim 1 in
which
said horizontal top plate is a reflective metallic sheet.
6. A heat insulated food retainer as defined in claim 1 in
which
said separator is a reflective metallic sheet.
7. A heat insulated food retainer as defined in claim 1 in
which
said metallic pot is a cook pot.
8. A heat insulated food retainer as defined in claim 1 in
which
said top plate and said first mentioned stack each has a plurality
of spaced vertical openings.
9. A heat insulated food retainer as defined in claim 1 in
which
said top plate is secured at its marginal edges to the interiors of
the vertical walls of the box,
both said stacks comprise sheets of newsprint paper,
said horizontal top plate is a reflective metallic sheet,
said separator is a reflective metallic sheet, and
said metallic pot is a cook pot.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to heat insulated food retainers.
2. Description of the Prior Art
It has heretofore been proposed to utilize receptacles of plastic
foam, with or without protective coverings for retaining food in
heated condition.
IT HAS ALSO BEEN PROPOSED TO PROVIDE HEAT INSULATED BOXES EMPLOYING
GLASS WOOL FOR INSULATION, AS IN Saborsky, U.S. Pat. No. 2,160,001;
impregnated synthetic fibers for insulation as in Edelman, U.S.
Pat. No. 2,579,036; loose fibrous materials such as kapok, cotton,
jute, wood shavings, and shredded paper with portions in adherent
relation to the boundary wall of the confining space as in Finch,
U.S. Pat. No. 1,923,195; or asbestos or mineral wool or other heat
non-conducting material, as in Rounseville, U.S. Pat. No.
756,999.
In the U.S. Pat. to Kunz, No. 749,205, it is proposed to employ
thick sheets of unwoven fibrous material such as carded cotton it
being stated that flax and ramie may also be used and arranged
alternately or between the sheets of cotton, thin sheets of paper,
preferably calendered or pressed manila paper, wound around the
chamber or part to be insulated or in the form of a pad.
The receptacles to be insulated, such as in Kunz and Rounseville,
and the materials proposed for insulation have numerous
shortcomings including relatively high cost of materials for the
completed structure, difficulty and hazards of handling some of the
insulating materials, and complexity of construction.
The heat insulated food retainer of the present invention overcomes
the shortcomings of the structures heretofore available.
SUMMARY OF THE INVENTION
In accordance with the invention a heat insulated food retainer is
provided which includes an outer protective box of wood, plywood or
the like, with a reflective metallic lining to reduce heat
transfer, the box having in the interior and beneath a metallic
reflective top sheet a stack of horizontal sheets of newsprint
paper with one or more vertical openings preferably die cut each to
receive a complementally shaped pot, preferably a cooking pot. The
bottom of the pot preferably rests on a reflective metallic sheet
which is spaced above the bottom of the box by a stack of
horizontally disposed sheets of newsprint paper. The contents of
the pot if hot are retained in hot condition, or if cold are
retained in cool condition, for an extended period of time.
It is the principal object of the invention to provide a heat
insulated food retainer which is simple and inexpensive in
construction, which permits of retention of food in heated or in
cool condition, and which is light in weight so as to be readily
portable for automobile or boat transportation or for use in the
home.
It is a further object of the invention to provide a heat insulated
food retainer which can be made of readily available materials
which are not in short supply.
Other objects and advantageous features of the invention will be
apparent from the description and claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The nature and characteristic features of the invention will be
more readily understood from the following description taken in
connection with the accompanying drawings forming part hereof, in
which:
FIG. 1 is an isometric view of the food retainer in accordance with
the invention with the lid open and showing one pot in place;
FIG. 2 is an isometric view of the inserted heat retaining
structure removed from the box;
FIG. 3 is a vertical central section view taken approximately on
the line 3--3 of FIG. 1; and
FIG. 4 is a horizontal sectional view taken approximately on the
line 4--4 of FIG. 3.
It should, of course, be understood that the description and
drawings herein are illustrative merely and that various
modifications and changes can be made in the structure disclosed
without departing from the spirit of the invention.
Like numerals refer to like parts throughout the several views.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now more particularly to the drawings, the food retainer
in accordance with the invention preferably includes a box 10,
preferably of wood, plywood or other suitable light weight
inexpensive material of adequate strength and preferably of
material acting as a heat insulator.
The box 10 has vertical front and rear walls 11 and 12, vertical
end walls 13 and a horizontal bottom wall 14 with a hollow lid 15
having vertical front and rear walls 16 and 17, vertical end walls
18 and a horizontal top wall 19, the rear wall 17 of the lid 15
being hinged to the rear wall 12 of the box 10 by hinges 20 and a
hasp 21 with its keeper 22 being provided to releasably retain the
lid 15 in closed position.
A gasket 23, of rubber or plastic foam, can be provided to seal the
meeting edges of the box 10 and lid 15.
Hinged handles 24 can be provided on the end walls 13 to facilitate
carrying.
The interior of the box 10 is preferably lined with a thin sheet 25
of bright reflective metal, such as aluminum, which can be secured
to the interior of the box 10 by a suitable adhesive (not shown).
The lining 24 can be foil or of thin sheet material.
The interior of the lid 15 is preferably lined with a thin sheet 26
of bright reflective metal secured thereto, similar to the lining
25.
Within the interior of the box 10 an inserted heat insulating
structure 30 is provided which includes a top plate 31, preferably
of light gauge sheet aluminum with downturned edges 32. The top
plate 31 is preferably of sufficient strength to withstand repeated
usage. The top plate 31 is provided with one or more openings 33 of
suitable diameter to snugly receive a pot 40 to be described. In a
specific embodiment the openings 33 can have diameters of seven
inches and an area therearound with a minimum dimension of one and
one half inches.
The openings 33 are spaced apart and are spaced inwardly from the
walls 11, 12 and 13. While two openings 33 are shown the number of
openings can be varied as desired and in accordance with the
capacity preferred.
The top plate 31 has disposed therebelow a stack 34 of horizontal
sheets of paper a preferred paper being paper known as MF newsprint
and weighing about 51.25 grams per square meter.
The stack 34 has spaced openings 35 preferably of the same diameter
as and aligned with the openings 33. In a specific embodiment, the
depth of the openings 35 is preferably of the order of 7 inches. At
the bottom of the openings 35 a thin sheet of bright reflective
metal 37 similar to the linings 25 and 26, is provided and
therebelow an additional stack 38 of sheets of paper, similar to
that of the stack 34 is provided but without vertical openings
therein. In the specific embodiment heretofore referred to the
height of the stack 38 is of the order of one inch.
The heat insulating structure 30 is preferably held in assembled
relation for insertion into the box 10 by a plurality of bands 39.
It is preferred that after the structure 30 is in place that the
margins of the plate 31 at the walls 11, 12 and 13 be held in place
to the walls by application of a suitable adhesive 45 which also
caulks the structure at these locations.
It is preferred that pots 40 suitable for cooking be employed and
if desired these can be of aluminum but stainless steel with copper
bottoms is preferred. The pots 40 have tight fitting relatively
flat lids 41 and bails 42 with their ends pivotally carried in
sockets 43.
In use the food to be retained can be cooked or heated in the pot
40, the pot 40 preferably being filled close to the top.
With the lid 15 open, the pot 40 with food to be retained is then
inserted through the openings 33 and into the opening 35 until the
bottom of the pot 40 rests on the sheet 37. The sockets 43 will be
on or close to the top plate 31. The bail 42 can be swung to a
tilted position and the lid 15 closed and held by the hasp 21 in
engagement with its keeper 22.
The storage of hot food in the retainer of the invention conserves
energy, gas or electricity, and permits of preparation of cooked
food in advance of the time of use. The food can be kept hot for
extended periods of time of the order of four hours or more. Cold
foods may also be stored and retained in cool condition.
It will be seen that a food retainer has been provided with which
the objects of the invention are attained.
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