초록 ▼

A time-temperature indicator indicates the useful shelf life of an associated product which may be affected by the passage of time and an applied temperature. A creeping material has a first end connected to a first fixed location and a second end connected to a load applying device such as a spring

A time-temperature indicator indicates the useful shelf life of an associated product which may be affected by the passage of time and an applied temperature. A creeping material has a first end connected to a first fixed location and a second end connected to a load applying device such as a spring. In response to application of the load applying device, the passage of time, and the application of various temperatures, the creeping material will increase in length in a known manner. An indicator associated with the creeping material indicates whether the passage of time and application of various temperatures have caused the associated product to exceed its useful shelf life.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for indicating a useful shelf-life of an associated product affected by time and temperature, comprising:a creeping material having a first end connected to a first fixed location, said creeping material increasing in length by a predetermined amount in respo

[ What is claimed is:] [1.] An apparatus for indicating a useful shelf-life of an associated product affected by time and temperature, comprising:a creeping material having a first end connected to a first fixed location, said creeping material increasing in length by a predetermined amount in response to application of a load, a passage of time and an applied temperature; anda loading device connected to a second end of the creeping material for applying the load to the creeping material, and a scale which indicates remaining useful life of the product in response to said increase in length by said predetermined amount of said creeping material.