Cartridge heater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 9, 1988
Grant Date -
N/A
app pub date -
Jan 29, 1987
filing date -
Jan 29, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrical cartridge heater includes a flat rectangular core of mica. A resistance wire is helically wound around the mica core. A cover sheet of mica is placed on one face of the wound core so that a return wire extends back without shorting against the other wires. The mica core is received in recesses in head and slug end bushings to position the element centrally within a cylindrical shell. A granular fill surrounds the core and heating element within the shell.
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Cited Art Landscape
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