Production of capsule shells and capsules
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United States of America Patent
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Issued Date -
Aug 9, 2007
app pub date -
Jun 25, 2004
filing date -
Jun 25, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for the production of a capsule shell comprises preparing the capsule shell by electrostatic powder deposition. A plurality of capsule shells may be produced by a process comprising electrostatically applying a powder coating material to a plurality of shaped substrates, treating the powder to form a continuous coating layer on each of the shaped substrates, and removing the shaped coating layers from the substrate to provide hollow capsule shells. An apparatus for the production of a capsule shell includes a substrate, a source of charged powder material and a voltage source for applying a bias voltage between the source of powder material and the substrate to generate an electric field therebetween such that powder material is applied to the substrate.
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