Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1984-08-30
1987-02-17
Bartis, Anthony
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219301, 219311, 219421, 219530, 219536, 219544, 2221465, 239133, 338239, 338247, 425549, H05B 300, B29F 103, B29C 3500, H01C 1032
Patent
active
046441409
ABSTRACT:
An electrically heated spray nozzle, such as for spraying plastics, includes a highly compressed tubular heating body wound about a spray nozzle as a plurality of coil windings. The heating body has a tubular steel inner jacket containing a pair of spaced electric heating elements embedded in a high compressed powdered insulating material. A copper outer jacket encases the inner jacket and a hard solder connection joint as least as broad as the diameter of the outer jacket connects the outer jacket and hence the heating body to the nozzle. The number of coil windings per unit length of nozzle body is larger near the ends of the nozzle than near its middle. A steel wear-resistant lining may cover the surface of the nozzle bore.
REFERENCES:
patent: 1127373 (1915-02-01), Read
patent: 1881444 (1932-10-01), Flanzer
patent: 2036788 (1936-04-01), Abbott
patent: 2721729 (1955-10-01), Van Riper
patent: 2767288 (1956-10-01), Lennox
patent: 3247359 (1966-04-01), Feld
patent: 3849630 (1974-11-01), Halliday
patent: 4150281 (1979-04-01), Hinz
patent: 4196855 (1980-04-01), Osuna-Diaz
Bartis Anthony
Turk & Hillinger GmbH
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