Abstract: Mechanical dumping apparatus is described that is adapted for use in a zinc powder galvanizing system. The apparatus is effective to confine the powder during the dumping operation in order to minimize operator exposure to the harmful effects thereof. Mechanism provided for inverting the container includes a lid closure device incorporating a slide gate for controllably discharging the contents of the container when in its inverted mode.

Abstract: A sectional door assembly, of the variety having a plurality of interconnected sections which are movable between a closed position and an open position. A flexible guide track is included on both sides of the door for guiding and supporting the plurality of sections between their respective open and closed positions. The flexible nature of the guide track, as well as the incorporation of a relatively quick release mechanism for retaining the guide track on the door's frame, allows for both minimization of damage to the door sections themselves and the time required to repair the door sections if they are accidentally damaged.