Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1975-07-29
1977-08-16
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346135, 346165, G01D 1506
Patent
active
040429369
ABSTRACT:
A recording method comprising the steps of selectively applying electric current or discharge to the member comprising a substrate; an electrically conductive, light colored intermediate layer disposed on the substrate, the color of the intermediate layer being convertible to a darker color in response to the application of the electrical current or discharge, and a white surface layer disposed directly on the intermediate layer, the white surface layer being no greater than approximately 10 microns thick.
REFERENCES:
patent: 2664044 (1953-12-01), Dalton
patent: 3789425 (1974-01-01), Matsushima
patent: 3891513 (1975-06-01), Yasumori et al.
Baker Joseph J.
Ferguson Jr. Gerald J.
Fuji 'Xerox Co., Ltd.
Hartary Joseph W.
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