Apparatus for filling heating tube

Details Apparatus for filling heating tube Apparatus for filling heating tube

1978-06-26

1980-02-26

White, Robert F.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

A23G 120

Patent

active

041904079

ABSTRACT:
An apparatus for manufacturing sheathed heating elements, including means for supporting a plurality of sheaths to be filled with a particulate material, means for positioning a plurality of resistive elements individually within the sheaths, a plurality of sets of inner and outer concentric filling tubes defining an annular filler passage therebetween for the material, means for positioning the plurality of sets of concentric filling tubes within the sheaths in surrounding relationship to the resistance elements, means for feeding the material through the passage as the tubes are withdrawn from the sheath so as to concentrically position each resistance element within its respective sheath and to fill the sheath from the bottom thereof with the material, and valve means for controlling the feeding of the material through the passage. The valve means is directly associated with the inner and outer concentric tubes and is movable between a first opened position permitting flow through the passage into the sheath and a second closed position for positively preventing flow from the passage into the sheath. The valve means includes a valve member positioned adjacent the lower ends of the tubes and movable relative to at least one of the tubes between said opened and closed positions.

REFERENCES:
patent: 2973572 (1961-03-01), Oakley
patent: 3277531 (1966-10-01), Boggs
patent: 3366723 (1968-01-01), Green

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