Electric tubular heating body and process for its manufacture

Details Electric tubular heating body and process for its manufacture Electric tubular heating body and process for its manufacture

1979-06-14

1981-04-21

Albritton, C. L.

Electrical resistors

Incased, embedded, or housed

Element inpowdered insulation with outer metallic sheath

29611, 29615, 219552, 219553, 219544, 338238, H01C 103

Patent

active

042635772

ABSTRACT:
An electric tubular heater with a bent jacket tube made of strip material, an electric resistance heating element running in the jacket tube and an electrically insulating embedding material surrounding the resistance heating element. The jacket tube is formed into a closed cross-sectional configuration by deformation of the extremities of the strip material by either bending into an overlapping relationship or by folding the extremities over each other. The bending of the extremities is performed so as to compress the embedding material to its predetermined final density and final cross-sectional configuration according to preferred embodiments.

REFERENCES:
patent: 1973629 (1934-09-01), Hofer
patent: 4101760 (1978-07-01), Roller

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