Preheat indicator

Details Preheat indicator Preheat indicator

1989-11-02

1991-03-12

Jones, W. Gary

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

2105101, 75407, 266 99, 266227, B01D 3914

Patent

active

049991019

ABSTRACT:
The present invention relates to a ceramic body suitable for use in molten metal filtration applications having a built-in preheat indicator and method for forming such a ceramic body. The preheat indicator comprises a dye having a burnoff temperature substantially equal to the desired preheat temperature applied to a surface of the ceramic body. In a preferred embodiment, the dye comprises an aniline dye such as Backmeier's crystal violet.

REFERENCES:
patent: 3893917 (1975-07-01), Pryor et al.
patent: 3947363 (1976-03-01), Pryor et al.
patent: 4081371 (1978-03-01), Yarwood et al.
patent: 4166058 (1979-08-01), Svigelj et al.
patent: 4331621 (1982-05-01), Brockmeyer

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