All plastic disposable thermometer

Details All plastic disposable thermometer All plastic disposable thermometer

G - Physics

01

K

73/123

G01K 1/00 (2006.01)

Patent

CA 1131050

ABSTRACT OF THE DISCLOSURE A new and useful all plastic disposable thermometer is disclosed, which dispenses with the prior art employment of an aluminum or other metal-based substrate. The novel thermometer can either be employed with opaque indicator means or with heat-sensitive compositions of matter that change color with a change in phase. The thermometer com- prises non-metallic polymeric heat-conducting embossable flexible base layer having one or more spaced cavities defined therein to determine a like number of predetermined temperatu- res in a predetermined temperature range, with a like number of different thermally responsive compositions of matter in the cavities. Each thermally responsive composition of mat- ter is associated with one of the predetermined temperatures. The thermometer also has a non-metallic sealant layer in sealing engagement with the base layer, and which overlies each of the cavities. There is obtained a non-vented subs- tantially vapor-impermeable enclosure for each cavity between the base layer walls and the floor of the cavity and the sealant layer. At one of the base layers, the sealant layer is transparent.

362058

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