U.S. patent application number 11/634433 was filed with the patent office on 2007-06-28 for open holding cabinet, trays and controls.
This patent application is currently assigned to The Frymaster Corporation. Invention is credited to Charles Milton Hutchinson, Evan Patrick McCommon, Keith A. Stanger, Michael Andrew Theodos.
Application Number | 20070144202 11/634433 |
Document ID | / |
Family ID | 38123466 |
Filed Date | 2007-06-28 |
United States Patent
Application |
20070144202 |
Kind Code |
A1 |
Theodos; Michael Andrew ; et
al. |
June 28, 2007 |
Open holding cabinet, trays and controls
Abstract
A cabinet for holding food having a housing and a plurality of
slots is provided. A tray is receivable in each of the plurality of
slots for receiving food. A controller is operatively associated
with each of the plurality of slots to independently control
cooking instructions for each of the plurality of slots. A cabinet
for holding food having a housing with a plurality of slots is
provided. A tray is receivable in each of the plurality of slots
for receiving food. The cabinet has an inputting device and a
controller, wherein the controller receives instructions from the
inputting device to control cooking instructions in each of the
plurality of slots.
Inventors: |
Theodos; Michael Andrew;
(Bossier City, LA) ; Hutchinson; Charles Milton;
(Shreveport, LA) ; Stanger; Keith A.; (Trinity,
FL) ; McCommon; Evan Patrick; (Princeton,
LA) |
Correspondence
Address: |
Paul D. Greeley;Ohlandt, Greeley, Ruggiero & Perle, L.L.P.
10th Floor
One Landmark Square
Stamford
CT
06901-2682
US
|
Assignee: |
The Frymaster Corporation
|
Family ID: |
38123466 |
Appl. No.: |
11/634433 |
Filed: |
December 5, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60742848 |
Dec 6, 2005 |
|
|
|
Current U.S.
Class: |
62/348 |
Current CPC
Class: |
F24C 15/18 20130101;
A47J 39/006 20130101 |
Class at
Publication: |
062/348 |
International
Class: |
F25C 1/00 20060101
F25C001/00 |
Claims
1-28. (canceled)
29. A cabinet for holding food comprising: a housing; said housing
having a plurality of slots; a tray receivable in each of said
plurality of slots for receiving food; and a controller operatively
associated with each of said plurality of slots to independently
control cooking instructions for each of said plurality of
slots.
30. The cabinet of claim 29, wherein said cabinet further comprises
a touch screen, said touch screen operatively associated with said
controller to receive pre-programmed cooking instructions for said
plurality of slots.
31. The cabinet of claim 29, wherein said touch screen is
operatively connected to said controller to change between a
plurality cooking modes of cooking instructions for said plurality
of slots.
32. The cabinet of claim 30, wherein said tray has an identifier
identifying a food type, said identifier recognizable by said
slot.
33. The cabinet of claim 32, wherein identifier is an RF tag, said
RF tag recognizable by an RF sensor associated with said slot.
34. The cabinet of claim 33, wherein said controller responds to
said RF sensor to activate preprogrammed cooking instructions for
said food type.
35. The cabinet of claim 33, wherein said each of said plurality of
slots is pre-programmed to recognize a single RF tag associated
with a food type.
36. The cabinet of claim 30, wherein said cooking instructions are
directed to food type, cooking temperature of said food type,
cooking time of said food type.
37. The cabinet of claim 29, wherein said each said plurality of
slots has at least one opening, said at least one opening partially
covered by a flexible sheet.
38. The cabinet of claim 29, wherein said flexible sheet is a
transparent Teflon sheet.
39. The cabinet of claim 29, further wherein each of said plurality
of slots has an upper heater and a lower heater, said upper heater
and said lower heater capable of being controlled
independently.
40. The cabinet of claim 30, wherein said touch screen comprises a
series of LEDs, said LEDs indicative of food expiration status
41. The cabinet of claim 30, wherein said touch screen comprises a
series of LEDs indicative of tray position.
42. The cabinet of claim 39, wherein said heaters are deactivated
upon total removal of said tray from each said slot.
43. A cabinet for holding food comprising: a housing; said housing
having a plurality of slots; a tray receivable in each of said
plurality of slots for receiving food; a inputting device; and a
controller, wherein said controller receives instructions from said
inputting device to control cooking instructions in each of said
plurality of slots.
44. The cabinet of claim 43, wherein said inputting device is a
touch screen display.
45. The cabinet of claim 43, wherein said touch screen display is
operatively connected to said controller to change between a
plurality cooking modes of cooking instructions for said plurality
of slots.
46. The cabinet of claim 43, wherein each of said plurality of
slots is configured to respond to an identifier associated with
each said tray to activate cooking instructions.
47. The cabinet of claim 46, wherein each said plurality of slots
is configured to accept a tray of a single food type.
48. The cabinet of claim 46, wherein each of said plurality of
slots is configured to accept a tray of a variety of food
types.
49. The cabinet of claim 46, wherein identifier is an RF tag, said
RF tag recognizable by an RF sensor associated with said slot.
50. The cabinet of claim 43, wherein said cooking instructions are
directed to food type, cooking temperature of said food type,
cooking time of said food type.
51. The cabinet of claim 43, wherein said each said plurality of
slots has at least one opening, said at least one opening partially
covered by a flexible sheet.
52. The cabinet of claim 43, wherein said flexible sheet is a
transparent Teflon sheet.
53. The cabinet of claim 43, further wherein each of said plurality
of slots has an upper heater and a lower heater, said upper heater
and said lower heater capable of being controlled
independently.
54. The cabinet of claim 44, wherein said touch screen comprises a
series of LEDs, said LEDs indicative of food expiration status
55. The cabinet of claim 44, wherein said touch screen comprises a
series of LEDs indicative of tray position.
56. The cabinet of claim 53, wherein said heaters are deactivated
upon total removal of said tray from each said slot.
Description
[0001] This application claims benefit of U.S. Provisional Patent
Application Ser. No. 60/742,848 filed on Dec. 6, 2005, the contents
of which are incorporated by reference herein.
1. FIELD OF THE INVENTION
[0002] This invention relates to a holding cabinet for food, trays
that are inserted into the cabinet and the electronic controls for
the preprogramming the cabinet to optimize food preparation and
holding.
2. BACKGROUND OF THE INVENTION
[0003] In the commercial food industry and in particular, in the
fast food industry, proper food preparation and readiness are a
necessity. Maintaining the food for immediate consumption or near
immediate consumption a challenging and evolving area. The
challenge is to maintain the food at a proper serving temperature
and maintaining optimal flavor.
[0004] Typically, holding cabinets are slotted metal cabinets that
have heaters to prevent the contents from becoming cool. However,
such cabinets risk drying the food so that it is no longer
palatable or heating the food such that it is either too hot or too
cool. Additionally, such cabinets must hold food that must be
assembled or partially cooked. In this instance, the different
components of the final food product must each be at the proper
temperature. Finally, the food must also be visible during the
holding time to be readily accessible by the food service
professionals and for restocking purposes.
[0005] Accordingly, there is a need for an automated pre-programmed
open holding cabinet that incorporates heated regions, electronic
controls and trays that maintain the food product at a desired
temperature for immediate/near immediate consumption and for rapid
preparation .
SUMMARY OF THE INVENTION
[0006] A cabinet for holding food having a housing and a plurality
of slots is provided. A tray is receivable in each of the plurality
of slots for receiving food. A controller is operatively associated
with each of the plurality of slots to independently control
cooking instructions for each of the plurality of slots.
[0007] A cabinet for holding food having a housing with a plurality
of slots is provided. A tray receivable in each of the plurality of
slots for receiving food is provided. The cabinet has an inputting
device and a controller, wherein the controller receives
instructions from the inputting device to control cooking
instructions in each of the plurality of slots.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Other and further object, advantages and features of the
present invention will be understood by reference to the following
specification in conjunction with the accompanying drawings, in
which like reference characters denote like elements of structure
and:
[0009] FIG. 1 illustrates a front perspective view of the cabinet
according to the present invention;
[0010] FIG. 2 illustrates a front view of the cabinet of FIG. 1 of
the present invention;
[0011] FIG. 3 illustrates a cross-section side view of the cabinet
of FIG. 1, according to the present invention;
[0012] FIG. 4 illustrates a tray of the present invention;
[0013] FIG. 5 illustrates a perspective top view of the cabinet of
FIG. 1, according to the present invention with the top covers
removed; and
[0014] FIG. 6 illustrates a schematic view of the main controller
and the RFID controller of he cabinet according to the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] Referring to FIG. 1, a holding cabinet of the present
invention is shown and is generally represented by reference
numeral 10. Holding cabinet 10 of the present invention is a pass
through cabinet that allows food trays to be inserted and removed
from cabinet front 15 or cabinet back 20. Another manifestation
wold featuere access to the heated slots 25 from on side of cabinet
10 only. Cabinet 10 has slots 25 to receive holding trays 50 of the
present invention. Cabinet 10 has a touch screen 30 that is capable
of receiving commands from an operator to program cabinet 10 with
cooking instructions. Cabinet 10 also has cooling air inlets at its
bottom to prevent air in cabinet 10 from becoming excessively hot.
Cooling air enters slots on side and exits across entire face on
the font and rear above the power switch and touch screen 30.
[0016] Referring to FIG. 2, cabinet 10 allows the food in a tray 50
to be held and kept warm without having to keep tray 50 close to
upper heater 40. The distance between the food in tray 50 and upper
heater 40 prevents the food from becoming dehydrated. While FIG. 1
shows three slots 25, other configurations of slots could also be
used. Cabinet 10 holds food temperature between 135.degree. F. to
200.degree. F. for long periods of time. For safety reasons, the
outside temperature of holding cabinet 10 should not exceed
140.degree. F.
[0017] Referring to FIG. 3, slots 25 are heated independently from
a slot top surface by upper heaters 40 and a slot lower surface by
lower heater 45. Independent heating of slots 25 permits an upper
surface, a lower surface or both an upper surface and a lower
surface to be heated for each slot.
[0018] Slots 25 each have an upper surface mounting bracket 60 and
a flexible sheet 65 that extends downward from mounting bracket 60.
Slot openings 70 at either end of slots 25 are partially covered by
flexible sheets 65 prevent air movement through slots 25. Flexible
sheet 65 prevents the hot, humid air in the cabinet 10 from
escaping to the outside environment. Slot openings 70 are partially
covered with sheets 65, but the remainder of the opening 70 permits
tray 50 to be inserted or removed. The sheets 65 are flexible so
that the food can be accessed without removal of the tray 50. The
sheet material, preferably TEFLON, is durable and transparent.
[0019] The are further benefits associated with the flexible sheets
65. Sheets 65 allow food to be more accessible and prevent the
operator from having to having to remove tray 50 from cabinet 10 to
observe the contents. The operator is able to assemble sandwiches
more efficiently and reduce the length of time that a customer
waits for food. Additionally, the operator sees when a tray is
getting close to being empty without pulling the tray, thereby
minimizing interruptions in assembly and customer service. Further,
the sheets 65 cover the opening 70 and the aluminum tray. The sheet
provides a movable barrier that keeps the holding environment hot,
but still allows access to the food for serving.
[0020] Referring to FIG. 4, tray 50 is a metal tray that is
designed to fit cabinet 10. Tray 50 allows superior holding and
versatility over trays that are currently being used because it can
be used with multiple products. Present holding cabinets require
four different trays along with extra wire-formed accessories to
hold food product successfully. Further, trays 50 are made from
aluminum and allow quick transfer of heat to the food product being
held. Cabinets are equipped with plastic trays that cool the
product down when initially used. The ridges in the bottom of the
tray provide minimal contact to the food product while maximizing
contact area to the heaters to allow the food to maintain its
original heat from cooking.
[0021] Trays 50 are configured to accept a variety of food types
for warming and heating. Trays 50 are sized to easily fit in slots
25 to ensure quick ingress and egress from either side of cabinet
10 during food service. Trays 50 also have embedded chips 52 to
activate timers in respective slots 25 when the trays 50 are
inserted. Chips 52 have radio frequency (RF) tags that are
associated with a particular food item that is placed therein. A
controller recognizes tag from being pre-programmed by operator
using touch screen. When a tray for a particular food item is
placed in cabinet 10, timer and heater automatically commence at
preprogrammed time and temperature, respectively.
[0022] A touch screen 30 is located at the front of cabinet 10.
Touch screen 30 permits an operator to enter into memory the
individual foods that will be kept in the cabinet and their
respective parameters, such as heating times and temperatures. In a
first mode, touch screen 30 permits entire cabinet 10 and
individual slots 25 to be preprogrammed to ensure that heaters are
activated at specified temperatures and for specified lengths of
time. This touch screen display allows a user to also program tray
and cabinet contents. Slot 25 is programmed to accept certain food.
When tray 50 is placed in slot 25, upper and/or lower heaters
commence proper operation based on the particular food, a timer
commences according to the food properties.
[0023] Slot 25 is equipped with RF sensors to detect the signal
from chip in tray 50 and to activate the timers. In a second mode,
tray 50 has an RF identifier that is recognized by controller.
Controller recognizes the RF tag that is associated with a
particular food to be heated at a pre-programmed temperature for a
preprogrammed time. In this mode when tray 50 is placed in slot 25,
timer automatically starts and food is warmed to preprogrammed
temperature. In an alternative move, the slot is already at a
particular temperature, and the controller sends a warning to the
user if a tray is inserted that requires a different set point
other than that for which the slot is set. The user wold then have
to insert the tray into a different slot. Touch screen 30 permits
cabinet 10 to be changed from one mode to another. Additionally,
touch screen permits changing between "Breakfast" and "Lunch"
modes, for example. There could also be other menus that are
available based upon, for example, seasonal food items.
[0024] Touch screen 30 displays particular foods in slots of
cabinet 10 to permit operator to read the status and location of
the food in the respective trays. Touch screen 30 shows the amount
of time that each tray 50 has been held along with all other
pertinent information about the food product in tray. Touch screen
30 provides a physical representation of cabinet 10 to readily
inform user of contents of each tray and tray status and shows the
status of the cabinet without having a separate/unique display for
each tray position. Presently, "first in" tray identification is
used, which is not always functional. On occasion, the contents of
a later inserted tray may expire prior to the contents of a
previously inserted tray and inhibit the operator from properly
planning replacement product. The programming capability does not
require a Personal Data Assistant (PDA) or other external devices.
In other embodiments, indicators using different colors,
brightness, or duplicity identify trays that contain food that are
approaching the end of their useful shelf life.
[0025] In FIGS. 5 and 6, main controller 80 controls all aspects of
the cabinet operation including storing all user inputted
information regarding food type, food temperature and heating
times. Main controller 80 controls the upper heaters 40 and the
lower heaters 45 of each slot independently. Upper heaters 40 in a
given slot will be rated at 750 W to 1000 W. Lower heaters 45 in a
given slot will be rated at 300 W to 600 W. While these ratings are
provided, other parameters could be used depending on cooking
specifications without limiting functionality. Controller 80
regulates the heaters with 1000 ohm RTDs, although other sensors
could be used using specifically designed relays called triacs, for
example.
[0026] Main controller 80 also interfaces with RFID controller 85
to control timing in each slot 25. For example, RFID will supply
the information through a 9-pin RS-232 port on the status of the
tray in each of the sixteen positions. In operation, on each side
of cabinet 10, trays are being inserted from the front and from the
back by user. If a user partially pulls tray 50 out of slot 25, the
timers would, in the absence of sensors, turn off and the food
would not continue to be warmed. However, the RF sensors allow the
timing and heating to continue when tray 50 is placed back in slot
25. Even if tray 50 is partially removed the timers will not
inadvertently shut off. Tray position can be detected up to 1''
away. Main controller 80 is able to monitor the time elapsed on
each individual tray 50 that has been inserted. The automatic
starting and stopping of timers, and programming of all features
through touch screen technology.
[0027] The time expired on each tray 50 is denoted with light
emitting diodes 90 (LEDs) that are also shown on the touch screen
monitor. Other than the simple LEDs 90, there are no displays on
each individual slot 25. The LEDs 90 operate to inform user of tray
status. For example, when tray 50 is inserted, the timer is to
start for that position a green LED illuminates. Green LED is
bright if it is signalling the only tray 50 of that product. When
tray 50 is partially out (partially inserted or removed), timer is
to continue running like in for that particular slot 25. Screen 30
shows an error message for that position and a buzzer will have
steady tone to differentiate from pulsing sound of product
expiration. When tray 50 is completely removed, the timer for that
slot is stopped. Controller 80 to switch the bright LED to the next
first-in-first-out tray for that product. The product in the left
most column determines the hold temperatures for that slot.
[0028] In each mode, the LED colors indicate the remaining length
of time of a food product before it expires. For example, the LED
color Green, may indicate approximately, from 100% usable product
life to 26% usable life remaining, and LED color Yellow would
indicate approximately 25% usable life remaining to expiration.
These percentages are approximate ranges. The LEDs are located at
each tray position. The green LED is on top and the yellow LED is
on bottom for each position. Both green and yellow LEDs blink and
the buzzer will sound (0.5 sec on/0.5 sec off) when food product
expires, or if the temperature falls 10.degree. F. below setpoint,
or if temperature is 10.degree. F. above setpoint for each
location. Each position of slot is identified with a file, such as
a .jpd file, that shows a picture of the food product, the RFID tag
of the tray and the time remaining. The screen will also have a
background color that is the same as the LED identifier at the
actual tray position. Audible alarm to indicate expiration has a
sound pressure level of approximately 95 dB at 12''.
[0029] The RF sensing capability in cabinet 10, controlled by RFID
controller 85, allows the automatic detection of tray position and
insertion time. By eliminating the human interaction during tray
insertion and removal, food product quality is assured. The
controller 80 senses the tray location and automatically starts the
timing operation when the tray is inserted, and stops timing when
the tray is removed. The automatic detection capability eliminates
the need for an operator to manually start a timer and a timer
switch that could malfunction. Additionally, identifyers/display in
the tray signal to the cabinet what food product is in the
tray.
[0030] While the instant disclosure has been described with
reference to one or more exemplary embodiments, it will be
understood by those skilled in the art that various changes may be
made and equivalents may be substituted for elements thereof
without departing from the scope thereof. In addition, many
modifications may be made to adapt a particular situation or
material to the teachings of the disclosure without departing from
the scope thereof. Therefore, it is intended that the disclosure
not be limited to the particular embodiment(s) disclosed as the
best mode contemplated for carrying out this invention, but that
the invention will include all embodiments falling within the scope
of the appended claims.
* * * * *