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Heated tray

  • US 5,582,754 A
  • Filed: 01/19/1995
  • Issued: 12/10/1996
  • Est. Priority Date: 12/08/1993
  • Status: Expired due to Term
First Claim
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1. A heated tray which comprises:

  • an electrically insulative body portion having a plurality of compartments for receiving a liquid to be frozen;

    an electrically conductive polymer having a resistance which changes as a function of temperature of the electrically conductive polymer, the electrically conductive polymer being configured to conform to a shape of each compartment of the electrically insulative body;

    a first electrode grid; and

    a second electrode grid,said first electrode grid being positioned between said electrically insulative body portion and one side of said electrically conductive polymer, and having a first electrode member adjacent each compartment of the electrically insulative body portion, to facilitate a generally uniform current flow density through the electrically conductive polymer thereby helping facilitate a generally uniform heating thereof, andsaid second electrode grid being positioned on another side of said electrically conductive polymer and having a second electrode member adjacent each compartment of the electrically conductive polymer, to facilitate a generally uniform current flow density through the electrically conductive polymer thereby helping facilitate a generally uniform heating thereof.

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