Method and apparatus for leveling a batch of pulverulent constituents in making a vitreous cellular material

摘要

A method and apparatus for leveling a batch of pulverulent constituents in making a vitreous cellular material. A screen structure having at least one substantially flat screen layer is impressed down into and through at least a portion of the batch of pulverulent constituents. The screen structure is vibrated horizontally in a circular orbital motion while impressing the screen structure down into and through at least a portion of the batch of pulverulent constituents.