초록 ▼

A device which will indicate whether thawing of a frozen item has occurred. The invention consists of a housing containing an internal cavity which is visible through a transparent section of the outside housing wall. A frozen plug is visible within said cavity. Said plug may consist of pure-water-i

A device which will indicate whether thawing of a frozen item has occurred. The invention consists of a housing containing an internal cavity which is visible through a transparent section of the outside housing wall. A frozen plug is visible within said cavity. Said plug may consist of pure-water-ice or ice containing additives affecting color and/or freezing temperature. Said housing may also contain a tension-loaded indication apparatus which is held in a fixed position by means of the frozen plug. Should thawing take place, the frozen plug would melt, thus allowing the tension-loaded indication apparatus to vary its position. Subsequent refreezing would not return the device to its initial condition.

대표청구항 ▼

A frozen food thaw detector comprising: a housing containing a cavity, a plug comprising a frozen liquid, and a tension-loaded pointing device; said frozen plug and said pointing device being contained in said housing; said pointing device when tension loaded being located at a first position at one

A frozen food thaw detector comprising: a housing containing a cavity, a plug comprising a frozen liquid, and a tension-loaded pointing device; said frozen plug and said pointing device being contained in said housing; said pointing device when tension loaded being located at a first position at one side of said cavity and when said tension is released being located at a second position on the other side of said cavity; said cavity including said pointer device in both said first and second positions being viewable through a transparent outer cover on said housing; said housing containing indicia to indicate said first position and said second position as frozen food and thawed food positions, respectively; said frozen plug being positioned in said cavity between said first and second positions to restrain said tension-loaded pointing device from relieving its tension and maintaining it at said first, frozen food indicating position as long as said frozen plug remains frozen; and wherein said frozen liquid is selected such that it melts at a predetermined temperature to indicate a particular food thawing temperature such that when said particular food thawing temperature is reached, said frozen plug melts allowing said tension-loaded pointer to relieve its tension and alter its location from said first position to said second position, thus indicating a food thawed condition; said tension-loaded pointing device maintaining said second thaw indicating position even if the detector and plug is refrozen.