Image retention on topical thermograph

Details Image retention on topical thermograph Image retention on topical thermograph

1978-05-15

1979-04-10

Dixon, Jr., William R.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

128 2H, 73356, 350338, 350351, C09K 334, G01K 1112, A61B 500

Patent

active

041489519

ABSTRACT:
Heat storage means are provided for reducing heat loss from a liquid crystal thermographic sheet, which normally has good heat transmission characteristics in order to respond readily to temperature variations along a body surface against which the sheet is pressed. The heat storage means include a sheet or layer of material having relatively poor thermal conductivity disposed adjacent to the thermographic sheet. One or more reflective sheets or layers may be used for reflecting the thermal image back into the layer of poor thermal conductivity.

REFERENCES:
patent: 3114836 (1963-12-01), Fergason et al.
patent: 3802945 (1974-04-01), James
patent: 3893340 (1975-07-01), Parker
patent: 3993809 (1976-11-01), Schranz et al.
patent: 4025688 (1977-05-01), Nagy et al.
patent: 4060654 (1977-11-01), Quenneville
patent: 4064872 (1977-12-01), Caplan

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