A method for manufacturing a sealed tubular heating cartridge has an insulating plate along the axis with spiral wound resistance wires in either side

摘要

The tubular housing (2) has a sealed end (3) and one or more resistance heating wire spirals (8,9) separated by an insulated plate (10) having separated semi-circular spacers (14) by which the granulated filling is distributed. Terminals (7) pass through a closing cap (5).