U.S. patent number 3,799,386 [Application Number 05/213,987] was granted by the patent office on 1974-03-26 for insulated covered serving tray.
This patent grant is currently assigned to American Hospital Supply Corporation. Invention is credited to Cecilia A. Follis, William A. Madalin.
United States Patent |
3,799,386 |
Madalin , et al. |
March 26, 1974 |
INSULATED COVERED SERVING TRAY
Abstract
A tray assembly for the delivery and service of food, such
assembly including a pair of insulated base and cover sections with
a plurality of dishes retained therebetween. Handle recesses at
opposite ends of the tray section facilitate the carrying and
handling of the assembly and indicia means in the form of a folded
card is clamped between the upper and lower sections with a portion
of the card exposed externally to provide appropriate information
concerning the menu, recipient, etc.
Inventors: |
Madalin; William A. (Franklin,
MI), Follis; Cecilia A. (Deerfield, IL) |
Assignee: |
American Hospital Supply
Corporation (Evanston, IL)
|
Family
ID: |
22797324 |
Appl.
No.: |
05/213,987 |
Filed: |
December 30, 1971 |
Current U.S.
Class: |
206/564; 229/916;
220/592.25; D7/541; 220/902; 220/23.8 |
Current CPC
Class: |
B65D
81/3834 (20130101); B65D 25/2897 (20130101); Y10S
220/902 (20130101); Y10S 229/916 (20130101) |
Current International
Class: |
B65D
81/38 (20060101); B65D 25/28 (20060101); B65d
025/18 () |
Field of
Search: |
;220/16,17,23.6,23.8
;206/4,DIG.29 ;229/2,5 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Price; William I.
Assistant Examiner: Marcus; Stephen
Attorney, Agent or Firm: Dawson, Tilton, Fallon &
Lungmus
Claims
The claims:
1. In combination, an insulated tray section having a plurality of
recesses for receiving dishes and the like, at least one of the
dish-receiving recesses being bordered by a flat annular supporting
surface, a dish disposed within said one recess, said dish having a
central depression and having a generally flat rim resting upon
said annular supporting surface of said tray section and an
insulated cover section extending over said tray section and having
a dome-shaped recess above said dish, said dome-shaped recess
having a diameter no greater than the diameter of the central
depression of said dish, said cover also having an annular wall
extending about said dome-shaped recess, said annular wall having a
flat undersurface engaging the rim of said dish.
2. The combination of claim 1 in which said dome-shaped recess is
of a diameter smaller than that of the central depression of said
dish.
3. The combination of claim 1 in which said tray and cover sections
are each generally rectangular in configuration.
4. The combination of claim 1 in which a plurality of dishes are
disposed within the recesses of said tray section, said cover
having a plurality of said dome-shaped recesses with the flat
undersurfaces of the walls surrounding said dome-shaped recesses
engaging the rims of said dishes.
5. The combination of claim 1 in which said tray section has a
generally flat bottom surface, and a side wall extending about said
tray section and projecting below the plane of said bottom surface
to define a space therebeneath, said side wall having at least one
pair of recesses along the bottom edge thereof and disposed at
opposite sides of said tray section, said recesses being adapted to
accommodate the fingers of a person carrying said tray section and
communicating with said space to permit the circulation of air
between adjacent tray sections when the same are stacked.
6. The combination of claim 5 in which said tray section has
undersurface portions defining the upper limits of the finger
recesses, the distance between said undersurface portions and the
top of said cover being substantially less than 6 inches.
7. The combination of claim 6 in which said distance is less than 5
inches.
8. The combination of claim 1 in which said tray section is also
provided with an open-topped compartment extending along a portion
of a side wall of said tray section, said portion of said side wall
being straight and having a round upper edge when viewed in cross
section, and a card being folded over said rounded upper edge, said
card having a first portion projecting downwardly into said
compartment and a second portion extending downwardly alongside the
outer surface of said side wall portion, said cover being provided
with means for holding said card in place.
9. The combination of claim 8 in which said second portion of said
card has an outer surface thereof bearing indicia concerning the
destination of the tray assembly and the contents thereof.
10. The combination of claim 8 in which said means provided by said
cover section for holding said card in place comprises a side wall
of said cover section having a lower edge extending along the side
wall portion of said tray section and engaging said card.
11. The combination of claim 1 in which one of said recesses of
said tray section is adapted to receive a handle-equipped drinking
cup, said tray section also having an enlarged open-topped
compartment adjacent said cup-receiving recess, and an upstanding
wall between said compartment and said cup-receiving recess, said
wall being provided with a notch for accommodating the handle of a
cup adapted to be supported in said recess.
12. The combination of claim 11 in which a drinking cup is disposed
within said cup-receiving recess, said cup having a handle
projecting through said notch and into said compartment, said
handle thereby being restrained within said notch and being
accessible within said compartment for the grasping and removing of
the cup from said tray section.
13. In combination, an insulated tray section having a plurality of
recesses for receiving dishes and the like, an insulated cover
section extending over said tray section and having dome-shaped
recesses above said dish-receiving recesses, said tray section
having a generally flat bottom surface and a side wall extending
about and projecting below the plane of said bottom surface to
define a space therebeneath, said side wall having atleast one pair
of recesses along the bottom edge at least and disposed at opposite
sides of said tray section, said recesses being adapted to
accommodate the fingers of the person carrying said tray section
and communicating with said space to permit the circulation of air
between adjacent tray sections when the same are stacked, said tray
section being provided with an open-topped compartment extending
along a portion of a side wall of said tray section, said portion
of said side wall being straight and having a rounded upper edge
when viewed in cross section, and a card being folded over said
rounded upper edge, said card having a first portion projecting
downwardly into said compartment and a second portion extending
downwardly alongside the outer surface of said side wall of said
tray section, said cover being provided with means for holding said
card in place.
14. The combination of claim 13 in which said second portion of
said card has an outer surface thereof bearing indicia concerning
the destination of the tray assembly and the contents thereof.
15. The combination of claim 13 in which said means provided by
said cover section for holding said card in place comprises a side
wall of said cover section having a lower edge extending along the
side wall portion of said tray section and engaging said card.
Description
BACKGROUND
While insulated trays have been known in the past, such assemblies
have for the most part consisted of insulated base and cover
sections designed to hold a single plate or dish of food (Clarke
U.S. Pat. Des. 158,050; Barron et al., U.S. Pat. Des. 191,124;
Clarke U.S. Pat. No. 3,019,783). Insulated trays have also been
developed to hold the dishes and utensils for a complete meal
service, such trays being constructed so that the base section of
one unit provides the insulated cover for another unit in the same
stack (Innis U.S. Pat. No. 3,122,265; Bridges U.S. Pat. No.
3,532,247). Such latter arrangement is only partially effective
since it lacks flexibility, requiring the trays to be dispensed in
a pre-set sequence from the top of the stack and making last-minute
adjustments in the order of service awkward and difficult.
SUMMARY
The present invention is concerned with an insulated tray assembly
which overcomes the disadvantages of prior constructions and which,
at the same time, is easy and convenient to handle in connection
with the transporting of hot (and/or cold) foods from the site of
preparation to the recipient. While the insulated serving tray is
particularly suitable for use in hospitals, nursing homes, and
other institutions, it will be apparent from the following that the
tray assembly might also be used in other places where meals of hot
and/or cold foods must be transported a substantial distance to the
recipient, or where the interval of delivery is long enough to
otherwise present a problem in maintaining the meals in serving
condition.
The tray assembly includes an insulated base or tray section having
a plurality of recesses for supporting a number of separate dishes.
The dishes may be formed of plastic, ceramic, or paper materials
and may be either reusable or disposable. Some or all of the dishes
are provided with bordering rims having substantially flat upper
surfaces which are covered and protected by flat undersurfaces of
an insulated cover. The cover is provided with downwardly facing
recesses which overlie the cavities of the dishes and which are
preferably of a size slightly smaller than such cavities to deflect
downwardly into the dishes food that might contact the cover during
delivery and handling of the covered tray.
Each tray section is provided with handle recesses at its ends
which not only facilitate loading, lifting and carrying of the
assembly but which also allow for the circulation of drying air
should the base or tray sections be stacked upon each other after
washing. Indicia means in the form of a card is folded over a side
flange of the base section and is clamped between the base and
cover sections, a portion of the card being exposed externally of
the assembly to indicate or identify the diet, the recipient,
location, etc.
Other objects and advantages will appear as the specification
proceeds.
DRAWINGS
FIG. 1 is a perspective view of a covered serving tray embodying
the present invention, the assembly being illustrated in condition
for handling and delivery;
FIG. 2 is a bottom view of the cover section illustrating the
recesses or cavities thereof;
FIG. 3 is a top plan view of the base or tray section;
FIG. 4 is a fragmentary perspective view taken along line 4--4 and
illustrating a handle recess of the base section;
FIG. 5 is an exploded perspective view illustrating the
assembly;
FIG. 6 illustrates the assembly in condition for delivery, the
indicia card being partially exposed to reveal the name and
location of the recipient;
FIG. 7 is an enlarged fragmentary sectional view taken along line
7--7 of FIG. 3 but with the cover in place;
FIG. 8 is an enlarged fragmentary sectional view taken along line
8--8 of FIG. 3 but with the cover in place;
FIG. 9 is a transverse vertical sectional view taken along line
9--9 of FIG. 3 but showing the cover in place;
FIG. 10 is a generally longitudinal sectional view taken along line
10--10 of FIG. 3 but with the cover in place;
FIG. 11 is an enlarged sectional view illustrating the relationship
of parts of the assembly, such sectional view being an enlargement
of the portion circumscribed by the broken line in FIG. 10.
DESCRIPTION
Referring to the drawings, numeral 10 generally designates a
covered tray assembly which includes a tray or base section 11 and
a top or cover section 12. Each section is composed of a pair of
plastic shells with a suitable insulating material, preferably a
rigid plastic foam, disposed between the shells. Thus, cover
section 12 has outer and inner shells 12a and 12b, respectively,
with plastic foam 12c therebetween. Similarly, base section 11 has
outer shell 11a, inner shell 11b, and insulating foam core 11c
(FIGS. 9 and 10).
The insulating cores of the upper and lower sections may be foamed
in place or may be introduced in some other manner into the space
between the inner and outer shells. A rigid plastic foam,
particularly one which bonds to the inner surfaces of the shells of
the respective sections, is preferred. Rigid polyurethane or
polystyrene foams may be used effectively. The shells of the
respective sections may be formed of polystyrene, polycarbonate, or
any other suitable plastic material capable of withstanding heat,
cold, and the various chemical agents found in foods and in the
cleaning of food-handling equipment.
Looking to FIGS. 5, 9, and 10, it will be observed that the inner
(or upper) shell 11a of tray section 11 is provided with a
plurality of recesses or depressions 13-22 for receiving articles
of dishware and other items of the type illustrated. Thus, small
plates and bowls 13a and 17a, and small plate 14a, may be received
within recesses 13, 17 and 14, respectively. A larger plate 16a is
adapted to be received within recess 16. Cups or vessels 15a, 18a,
and 20a are intended to be received by recesses 15, 18 and 20,
respectively. The other recesses 19, 21 and 22 may be used for
condiments, beverage cartons and flatware (not shown),
respectively, the flatware recess also being large enough to
contain other items such as a napkin, menu card, and the like.
While a menu card or sheet may be disposed in its entirety within
recess 22, one aspect of the invention lies in the cooperative
relationship between such a card and the components of the tray
assembly when the card is folded and supported as indicated in FIG.
8. There it will be observed that card 23 is folded along line or
zone 24 and has one portion 23a disposed within recess 22 and a
second portion 23b projecting outwardly from between the base and
cover sections of the tray assembly. Enough of portion 23b is
externally exposed to provide an indicia-bearing surface on which
may be written the name and location of the patient, or any other
appropriate information. In hospitals, where special diets are
frequently required, such external indicia means is believed
important in insuring that any given meal service will be delivered
to the proper destination.
As shown in FIG. 8, the foldable menu card is supported with its
folded portion 24 resting upon the upper surface of upstanding side
wall 25 of the base section 11. If desired, such upper surface 25a
may be rounded slightly, as illustrated in FIGS. 5 and 8. However,
it is important that the rounded surface or wall of the base be
high enough so that the card, when supported as shown in FIG. 8,
will also be engaged by the undersurface of side wall 26 of cover
section 12. The card is therefore clamped in position between the
upper and lower sections and is held securely in place, in the
manner illustrated in FIGS. 6 and 8, until the assembly reaches its
destination and the cover section is removed.
Recess or compartment 22 is also defined in part by an inside wall
27 of tray section 11b (FIG. 5). Wall 27 extends between and
separates recesses 22 and 20; however, it will be observed in FIGS.
5 and 7 that the upper edge of wall 27 is depressed or notched at
27a to accommodate the lower portion of the handle 28 of cup 20a
when the cup is received within its cavity or compartment 20. The
arcuate depression 27a insures that the cup will be oriented with
its handle extending into the large flatware-receiving cavity 22.
Consequently, the cup is oriented with its handle facing in a
direction which will not interfere with closing of the upper and
lower sections and, in particular, so that the handle 28 is exposed
within large compartment 22 where it may be easily grasped by a
user.
The underside of cover 12 is provided with a plurality of
dome-shaped recesses 29-33 which are disposed above cavities 13-17,
respectively, of the base section 11 (FIG. 5). The dome-shaped
recesses are bordered by annular walls providing flat perimetric
undersurfaces 29a-33a, such undersurfaces overlying and engaging
the substantially flat rims of dishes 13a17a, respectively, when
the parts are assembled. It is to be observed that the flat rims of
the dishes are fully covered by the perimetric undersurfaces of the
top section 12 and that the dome-shaped recesses of the top section
are in most instances smaller in diameter than the cavities or
central depressions of the dishes supported by the base section 11.
Consequently, the rims of the dishes are protected against contact
with food carried within the dishes should the tray be bumped or
moved abruptly during delivery. The flat borders of the dishes tend
to remain clean and neat in appearance and, at the same time, the
dishes are locked against independent movement (relative to the
upper and lower sections of the assembly) because their rims are
retained between the flat opposing annular surfaces bordering the
recesses of the upper and lower tray sections.
FIG. 11 illustrates a typical relationship of the parts with the
flat circular flange or rim 35 of dish 13a disposed between the
flat opposing surfaces 29a and 13b of the upper and lower tray
sections 12 and 11, respectively. It will be observed that the
dome-shaped recess 29 of the upper section or cover has a maximum
diameter no larger (in most instances slightly smaller) than the
maximum inside diameter of dish 13a. Thus, should abrupt movement
of the assembly tend to cause displacement of the food in the dish,
the recessed undersurface 29 will tend to direct such back towards
the central depression of dish 13a.
The tray assembly is generally rectangular in configuration and is
adapted to be held and carried as illustrated in FIG. 1. To
facilitate such operations, the walls 25 at opposite ends of the
elongated base section 11, and along the longitudinal midline
thereof, are cut away or interrupted to define finger openings or
recesses 37 (FIG. 4). Each recess is defined by an inwardly and
transversely extending upstanding wall 37a and a horizontal wall
37b, the latter being spaced well above the bottom edge 25a of the
side wall of the base section. Recess 37 is therefore large enough
to receive a user's fingers (as illustrated in FIG. 1) even when
the bottom edge 25b of the base rests upon a flat supporting
surface. Furthermore, the distance between undersurface 37b and the
top surface 38 of cover section 12 when the parts are assembled is
substantially less than the span between the thumb and middle
finger of an average adult hand and, consequently, a user may
easily hold the cover tightly in place with his thumbs as the
entire assembly is carried, as shown in FIG. 1. Specifically, the
distance between undersurface 37 and top surface 38 is
substantially less than inches, and preferably under 5 inches.
It will be observed that the flat bottom wall 39 of the base
section is spaced above the plane of lower edges 25b. One purpose
of such a construction is to provide a space beneath the base
section to accommodate irregularities in a supporting surface and
thereby provide stability despite such irregularities. It is to be
noted, however, that when base sections are stacked upon each
other, as in a drying operation, air may circulate between such
stacked sections to facilitate the drying action. In that
connection, handle recesses 37 perform an important function in
permitting the free flow of air between opposing surfaces of the
stacked sections. If desired, notches or openings 40 may also be
provided along the lower longitudinal edges of side walls 25 to
further promote the free circulation of air between the stacked
sections.
While in the foregoing we have disclosed an embodiment of the
invention in considerable detail for purposes of illustration, it
will be understood by those skilled in the art that many of these
details may be varied without departing from the spirit and scope
of the invention.
* * * * *