U.S. patent number 3,760,996 [Application Number 05/152,814] was granted by the patent office on 1973-09-25 for invertible dual purpose tray holder.
Invention is credited to Morris C. Campbell.
United States Patent |
3,760,996 |
Campbell |
September 25, 1973 |
INVERTIBLE DUAL PURPOSE TRAY HOLDER
Abstract
A one-piece tray holder is provided which has a cradle portion
including a first aperture for supporting a tray or the like of a
first configuration when the holder is oriented in a first
position. When inverted, the cradle presents a different sized
aperture for supporting a tray or the like of a second
configuration. The tray holder is particularly well adapted to hold
frozen dinner trays which are currently available in two standard
sizes. The holder performs the dual function of providing
mechanical support and stability for the tray being held as well as
providing thermal insulation both to protect the consumer during
the transportation of a heated tray, and to protect the surface on
which the holder and heated tray may be placed.
Inventors: |
Campbell; Morris C. (Grand
Rapids, MI) |
Family
ID: |
22544556 |
Appl.
No.: |
05/152,814 |
Filed: |
June 14, 1971 |
Current U.S.
Class: |
220/23.83;
206/558; 294/141 |
Current CPC
Class: |
A47G
23/06 (20130101) |
Current International
Class: |
A47G
23/06 (20060101); A47G 23/00 (20060101); A47g
023/06 () |
Field of
Search: |
;206/72,77
;224/48R,48.7,48.3,48.4,48.2,48A,48B,48W,45R,45.5,45.6 ;229/30
;220/17 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Spar; Robert J.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are defined as follows:
1. A tray holder comprising a cradle having a bottomless
unobstructed central opening defined by sidewalls which are
sections of material having vertically extending flat interior
surfaces unobstructed along a major portion of their length and
joined at end segments thereof by end walls, each of said end walls
comprising a first vertically extending portion and a horizontal
flange extending from said first portion adjacent a bottom edge of
at least one of said end walls, the cradle thus formed includes a
first tray holding rim defined by a top edge of said sidewalls and
the top edge of said first portion of said end walls for supporting
a first sized tray having edges extending over said first rim when
positioned on said holder when said holder is in a first position,
and a second tray holding rim defined by the bottom edge of said
sidewalls and the flange portion of said at least one end wall for
supporting a second sized tray having edges extending over said
second rim when positioned on said holder when said holder is
inverted.
2. A tray holder as defined in claim 1 and further comprising
handle means mounted to said end walls and extending away from said
apertures.
3. A tray holder as defined in claim 1 wherein said flange portion
associated with each of said end walls is in orthogonal
relationship thereto.
4. A tray holder as defined in claim 3 wherein said flange portions
extend from an edge of each of said end walls and are joined to
said sidewalls.
5. A tray holder comprising an open cradle having sidewalls which
are flat sections of materials joined at end segments thereof by
end walls wherein the height of each of said sidewalls is reduced
in a tapered manner from one of said end walls to a center portion,
and increased from said center portion to the other said end wall,
each of said end walls comprising a first portion and at least one
flange portion extending orthogonally from an edge of said first
portion of said end wall and joined to said sidewalls, the cradle
thus formed includes a first aperture defined by the distance
between said sidewalls and the distance between the first portion
of said end walls adapted to receive a first sized tray when said
holder is in a first position, and a second aperture contiguous
with said first aperture along said sidewalls and extending between
the edges of said flange portions of said end walls adapted to
receive a second sized tray when said holder is inverted, and
handle means mounted to said end walls and extending away from said
apertures.
6. A tray holder as defined in claim 1 which is manufactured from a
plastic material suitable for injection molding.
7. A tray holder for holding one of two different sized trays, said
tray holder comprising an open cradle having a first rectangular
aperture whose dimensions conform with the dimensions of a first
sized tray when said cradle is in a first position, and a second
rectangular aperture in said cradle whose dimensions conform to the
dimensions of a second sized tray when said holder is in an
inverted position; said cradle comprising sidewalls which are
substantially flat sections, and end walls comprising L-shaped
sections which join end segments of said sidewalls to form a
generally rectangular cradle structure, wherein said sidewalls have
a height dimension which is reduced in a tapered manner from each
end of each of said sidewalls to a center portion and wherein the
height of said sidewalls at each end is sufficient to hold said
trays in spaced relationship above a surface in which said tray
holder is placed, and said end walls having a vertical portion and
a flange portion which is orthogonally joined to said vertical
portion at one edge thereof, said first aperture being defined by
the distance between said sidewalls and the distance between said
vertical portion of said end walls, and said second aperture being
contiguous with said first aperture along said sidewalls and
extending between the edge segments of said flange portions of said
end walls, and handle means extending orthogonally from said end
walls at a midpoint thereof and away from said apertures.
8. A tray holder as defined in claim 7 wherein said tray holder is
manufactured of a plastic material.
Description
BACKGROUND OF THE INVENTION
The present invention relates to tray holders and particularly to a
holder which can be inverted to accommodate different sized
trays.
For several years, frozen dinners have been available (so-called
T.V. Dinners) which can be placed in an oven for heating prior to
consumption. These dinners are generally packaged in rectangular
tray or dish-like articles having separate compartments for the
food. The trays are generally made of a conducting material which
becomes relatively hot when the food is heated for serving, thus,
it is necessary to wear insulated mittens or the like when removing
the heated dinners from the oven and transporting them to the
location where they will be consumed. Frequently, it is necessary
also to rest the T.V. Dinner on a dinner plate or the like which
serves to protect the table surface on which the dinner is placed
from damage due to direct contact with the heated tray.
Although the trays currently in use for the frozen dinners are
relatively flat and rectangular, they lack structural rigidity and
can easily bend and spill their contents. When placed on a plate or
other object, they may tend to slide and are easily tipped or
overturned. It is desirable, therefore, to provide support means
for positively holding and supporting the tray during the
consumption of the food thereon while also providing thermal
insulation such that the tray can be moved about without the need
for using pot holders or the like. Additionally, it is desirable to
protect the surface on which the tray may be placed against damage
due to contact with the hot tray. The tray holder of the present
invention accomplishes these and other objectives while providing a
tray holder which is invertible to hold different size T.V.
dinner-type trays currently available.
It is, therefore, an object of the present invention to provide an
invertible, dual purpose tray for receiving and holding one of two
different sized trays while in a first position, and the other of
the different sized trays in its inverted position.
An additional object of the present invention is to provide a
holder having handles serving as thermal insulators for
transporting the tray.
It is a further object of the present invention to provide a tray
holder which provides mechanical stability and support for holding
a tray or the like and which holds a heated tray spaced above the
surface on which the holder is placed.
SUMMARY OF THE INVENTION
Apparatus embodying the present invention includes a cradle formed
from relatively straight sidewalls and end walls joining end
portions of opposite sidewalls. The end walls are formed from
L-shaped members such that a first aperture is formed by the edges
of the side and end walls of the cradle when in a first position,
and a second aperture having a different size is formed by the
opposite edges of the sidewalls and end walls of the cradle when in
an inverted position. Handle means are attached to each of the end
walls and extend outwardly from the apertures formed by the side
and end walls.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan view of the tray holder shown in a first
position;
FIG. 2 is a front edge view of the tray holder shown in FIG. 1;
FIG. 3 is an end view of the tray holder shown in FIG. 1 as viewed
from the left side;
FIG. 4 is a sectional elevation view of the tray holder shown in
FIG. 1 taken along the section lines IV--IV and shows the insertion
of a tray having a first size onto the holder, and
FIG. 5 is a sectional elevation view of the tray holder shown in
the FIG. 4 but inverted such that the tray holder can accommodate a
different sized tray as shown in the figure.
DETAILED DESCRIPTION OF THE FIGURES
In the figures, there is shown a tray holder 10 having a cradle
formed by the junction of sidewalls 12 and 14 with end walls 16 and
18. It is noted that the sidewalls 12 and 14 are realtively flat
sections (FIG. 1) whereas the end walls 16 and 18 are L-shaped
(FIG. 2) including vertical portions 16' and 18' and flange
portions 17 and 19, respectively. The flange portions of the end
walls are joined to the sidewalls to form curved corners as shown
in FIG. 1. A first rectangular aperture is defined by the
substantially flat vertically extending interior surfaces of the
space between the sidewalls 12 and 14 and the space between the
substantially flat vertically extending interior surfaces of
portions 16' and 18' of the end walls 16 and 18, respectively. A
somewhat smaller second aperture is formed in the bottom (FIG. 1)
of the holder. Its shape is defined by the distance between the
sidewalls 12 and 14 and the distance between the inner edges 17'
and 19' of flange portions 17 and 19 of the end walls 16 and 18. It
is seen that this second aperture has a width identical to the
first aperture and is contiguous therewith but has a length which
is somewhat shorter than the length of the first aperture and
accommodates a correspondingly smaller tray. In one embodiment, for
example, the first aperture had a dimension of approximately 6 5/16
inches .times. 10 3/16 inches while the dimensions of the second
aperture was approximately 6 5/16 inches .times. 8 5/8 inches.
These dimensions are purely exemplary.
The use of the holder with different tray sizes is illustrated in
FIGS. 4 and 5. In FIG. 4, for example, a tray 20 has a body portion
which fits into the first aperture. The overhanging edges of tray
20 rest on the first tray holding rim comprising the top edges of
sidewalls 12 and 14 and the top edges of the vertical portions 16'
and 18' of the end walls 16 and 18. When the tray holder 10 is
inverted as shown in FIG. 5, a somewhat smaller tray has a body
portion which is accommodated by the second aperture. The
overhanging edges of tray 22 rest on the second tray holding rim
comprising the bottom edges of the sidewalls 12 and 14, and the
flange portions 17 and 19. It is noted that the height of the
sidewalls 12 and 14 and end walls 16 and 18 is sufficient to
prevent the bottom portions 21 and 23 of trays 20 and 22,
respectively, from touching the surface upon which the tray holder
is positioned. Thus, the tray holder will prevent contact between
the heated tray contained therein and the surface upon which the
tray holder is placed.
In the embodiment illustrated, the height of the sidewalls is
tapered slightly inwardly from end wall 16 to a midpoint 13 (FIG.
2) at which the height of the sidewalls are a minimum. From
midpoint 13 to the end wall 18, the sidewalls are tapered
outwardly. This design allows only the edges of the end walls to
come into contact with the surface upon which the holder is placed.
Such design adds to the stability of the holder since the weight of
the T.V. Dinner will firmly seat the two end wall edges on the
suppprting surface. Thus, the sidewalls need not be critically
formed such that all four edges (end wall and sidewall edges) lie
in the same plane.
The tray holder can be molded from any suitable plastic material
which has sufficient mechanical rigidity and a melting point which
is above the maximum temperature to which the tray used with the
tray holder is heated. The tray holder can be manufactured in a
relatively inexpensive manner by employing a two-section injection
mold. The resultant tray holders can be disposable by the consumer
after use, or the tray holder may be manufactured such that it is
sufficiently durable to be reusable by the consumer. In this latter
case, the material should be durable when the tray is subjected to
mechanical or automatic washing.
This invention has uses in fields where labor costs of conventional
food service have become excessive. Hospital use is one such field.
In hospitals, the cost of washing, storing and distributing food
with conventional china has reached the point of exceeding the cost
of using disposable food containers. If a convenient means of
handling such containers were available, the use of disposable food
containers would permit hospitals to utilize outside food
preparation facilities.
This invention makes this possible since it provides a holder
having a stabile base and support for very thin, lightweight food
containers of the disposable type. For institutional uses of this
type, the tray holder can be manufactured of materials which make
it feasible to employ it as a one-use, disposable item or it can be
manufactured of materials which permit reuse and will withstand
repeated automatic washing. It is feasible to wash and reuse the
tray holder of this invention even under institutional
circumstances where the washing and reuse of conventional dishes is
impractical. Dishes require careful sorting and placement for both
washing and storage. The tray holder of this invention does not
require any such attention. Therefore, labor involved in its reuse
is minimal. Further, since it can be used with two sizes of food
containers, a single inventory of the tray holders can satisfy the
complete requirements of the institution. Different diet meals may
be placed on different sized trays which can be held by the holder
of the present invention.
It will be recognized that the tray holder's shape may be adapted
to the requirements of its use. Thus, it may be square, round or
some other gemoetric configuration, so long as it provides top and
bottom openings to receive food holders of two different sizes, has
a depth sufficient to suspend the food holder above the surface on
which the tray holder rests, and provides a supporting surface to
engage the rim of the food holder.
* * * * *