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AssigneeUnited States Gypsum Company
InventorsWilliam A. FRANK, Eugene Scott STIVENDER, Lloyd M. GEORGE
Estimating the term…
A head-box for depositing slurry upon a moving web including a main metering roll, a companion roll disposed in closely spaced relation to the metering roll and a vibrating gate which forms a nip between the metering roller and the gate. The nip is arranged to retain a supply of the slurry, and the rolls are driven so slurry retained in the nip progresses over an upper outer peripheral surface of the metering roll to be deposited upon the web. Also, preferably included is a doctor blade disposed in operational relationship to the metering roll for directing the slurry downwardly from the outer metering roll surface to a point above the surface of a carrier for a fiberglass layer upon which the slurry layer is deposited. The vibrating gate and doctor blade may be pivotally mounted to either side of the surfaces of the head-box.
A slurry feed apparatus for depositing a slurry upon a moving web having a direction of travel, comprising:
The apparatus of claim 11, wherein the doctor blade is pivotally attached to sidewalls of the slurry feed apparatus and biased by a spring towards the metering roller.
A continuous process for depositing a uniform layer of a cementitious slurry from a slurry headbox onto a traveling web containing a layer of fiberglass comprising:
Dependencies are inferred from the claim text.