The piece of boarding which covers the rough apron piece of a staircase.


Related Terms

MATTE FEEDER

A heavy-duty apron feeder composed of thick steel flights attached to a solid chain-link mat supported by closely spaced rollers.

LIP

1. A parapet placed on the downstream margin of a millrace or apron in order to minimize scouring of the river bottom. 2. Cutting edge of a fluted drill formed by the intersection of the flute and the lip clearance angle, and extending from the chisel edge at the web to the circumference.

APRON

The area immediately in front of or behind a wharf shed on which cargo is lifted. On the 'front apron,' cargo is unloaded from or loaded onto a ship. Behind the shed, cargo moves over the 'rear apron' into and out of railroad cars.

APRON FEEDER

A limited-length version of apron conveyor used for controlled-rate feeding of pulverized materials to a process or packaging unit. Also known as plate-belt feeder; plate feeder.

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