Flakes made of materials such as glass
OwnerCharles Watkinsoninventor
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Abstract
The present invention provides flake having a thickness up to 350 nm, the flake being made of basalt, ceramics, alumina, graphite, a metal, a metal oxide or a combination of any two or more thereof. Equipment for manufacturing such flake is also described as is a method for the manufacture of the flake. The equipment comprises a cup mounted for rotation and for receiving molten glass. The equipment further comprises either insulating means extending at least partially around said cup or means for heating the cup while it is rotating.
Claims28
Glass flake having a mean thickness of 40 to 200 nm, wherein at least 80% of the flake is within 20% of the nominal mean thickness.
Equipment for making flakes, the equipment comprising a cup mounted for rotation about a longitudinal axis, means for feeding molten glass into said cup, and means for rotating said cup about said axis whereby a film of molten glass is caused to emanate radially from the rim of said cup, the equipment including a member selected from insulating means extending at least partially around said cup and means for heating the cup while it is rotating, and wherein the equipment is provided with plates forming an annular venturi and for receiving the film of molten glass, with the distance between the edge of the cup and the entry into the annular venturi plates being from 10 to 75 mm.
Dependencies are inferred from the claim text.