Flocculant-dispersant agents for copper ores
The electric hotplate is described has a laminated structure in which the heating element comprises strips of positive temp. coefft. of resistance material R on an insulating substrate. The strips are connected in a series parallel arrangement between conductors A,X,Y,Z and B. The interconnecting co...
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Main Authors | , , , |
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Format | Patent |
Language | English Italian |
Published |
26.08.1987
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Edition | 4 |
Subjects | |
Online Access | Get full text |
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Summary: | The electric hotplate is described has a laminated structure in which the heating element comprises strips of positive temp. coefft. of resistance material R on an insulating substrate. The strips are connected in a series parallel arrangement between conductors A,X,Y,Z and B. The interconnecting conductors X,Y and Z are of a material with a negative temp. coefficient of resistivity. Strips are screen printed or the ceramic be insulative covering of a metal plate from a viscous ink of powdered nickel or cobalt plus glass. |
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Bibliography: | Application Number: IT19840048568 |