Resources Contact Us Home
Nesting insulated hot-or-cold food tray

Image Number 2 for United States Patent #3938726.

An integral tray structure of expanded substantially rigid plastic foam material, typically polystyrene foam is formed to have a bottom plate surface, an upstanding surrounding, inclined rim and a laterally projecting flange formed on the rim, the flange having, around its periphery, spaced projections, and recess means which are so arranged that, upon inversion of a tray structure above another tray structure, a hollow, insulated chamber, to contain hot or cold food, is formed. The projecting and recess means can be used to lock the tray structures together, and the inclined rims permitting nesting of the tray structures within each other, for minimum space requirements of the tray structures themselves for transportation and storage. The projecting-recess means may be formed as tabs engaging notches, or perpendicularly projecting buttons engaging matching cut-outs.

  Recently Added Patents
Method for producing carrier on which microorganisms capable of conducting multiple parallel mineralization are immobilized, column reactor and solid medium for cultivating plants
Pre-sealing unit for wire-cut electric discharge machine
Switching power supply apparatus with overcurrent limiting and prolonged holding time
Sensor coating
Method and apparatus for reducing power consumption used in communication system having time slots
System and method of supplying an electrical system with direct current
Monitoring system
  Randomly Featured Patents
Channel estimation
Emitter for electron-beam projection lithography system, and method of manufacturing and operating the emitter
Permanent split capacitor single phase electric motor system
Optical devices comprising series of birefringent waveplates
Multichannel constant envelope orthogonal waveforms using receiver design
Microwave oven systems and methods
Incontinence treatment with urethral guide
Flue gas closure system
Method for forming isolation structure of different widths in semiconductor device
Nit comb handle