Food service system utilizing reflected infrared signals to iden

Details Food service system utilizing reflected infrared signals to iden Food service system utilizing reflected infrared signals to iden

1991-05-23

1993-09-07

Reynolds, Bruce A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219521, 219502, 99331, 165918, 126246, A47J 3900, H05B 368, A47B 302, A47G 2306

Patent

active

052431711

ABSTRACT:
In a food service system, prepared meals including chilled foods are assembled in individual meal trays (10) and held in the trays for a period prior to regeneration to prepare the food for heating. A control system of a rethermalizing trolley (12), which accommodates a large number of trays, can discern for itself which dishes (30) in the trays need heating and which are to remain cool. Dishes for hot and cold foods have white and black markings respectively, which results in reflected infra-red signals from sensors (42, 44) of the control system to be of discernably different strengths, so identifying the hot food dishes. Dish temperature is continually monitored by the control system by means of thermal contact with thermistors (46), which enables the system to oversee food temperatures both prior to and during regeneration.

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