Split plenum arrangement for an apparatus for coating tablets

US6692571B2 · kind B2 · utility

Assignee

• GLATT AIR TECHNIQUES, INC. · US

Inventors

• David M. Jones · Ramsey, US
• Richard Andrew Smith · Middletown, US
• John P. Kennedy · Willmar, US
• Frank Maurer · Skokie, US
• Matthias Tondar · Eschborn, DE
• Bernhard Luy · Glückstadt, DE
• Markus J. Baettig · Sissach, CH

Key dates

• Filing date: May 1, 2003
• Grant date: Feb 17, 2004
• Expiry date: May 1, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S118/05
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A fluidized bed apparatus for applying a coating liquid onto the surface of particles includes a vertically disposed cylindrical product container having a peripheral wall, at least one cylindrical partition defining a centrally located up bed region and a peripherally located down bed region. The product container further includes an upper end connected to an expansion chamber and a lower end including an orifice plate having a plurality of openings for passage of fluidized air or gas. The fluidized apparatus further includes a central first plenum located below the orifice plate and being aligned with the up-bed and the partition, the first plenum being sized and shaped to direct gas upwardly through the orifice plate and into the up-bed; and a second plenum located below the orifice plate positioned around the first plenum for directing gas upwardly through the orifice plate and into contact with particles located on the orifice plate.