Wurster accelerator with powder applicator
AssigneeFreund-Vector Corporation
InventorsLarry A. Maher, Brian K. Jensen, Shawn M. Engels
Life of this patent
Estimating the term…
Abstract
A Wurster processor and a powder feed system are coupled via an eductor so as to supply dry powder through the air diverter sleeve of the Wurster for discharging onto the circulating particles during operation of the Wurster. Agglomeration and aggregation of the particles is eliminated or minimized by isolating or separating the liquid spray by the spray gun from the dry powder.
Claims20
A Wurster apparatus for coating particulates, including a gun assembly with a spray nozzle for spraying liquid onto the particulates, comprising:
- a sleeve surrounding the gun assembly and the sleeve having a plurality of outlet ports;
- and
- a source of dry powder connected to the sleeve so as to discharge the dry powder through the outlet ports in an outwardly radial direction to coat the particulates.
A Wurster apparatus for coating particulates, including a gun assembly with a spray nozzle for spraying liquid onto the particulates, comprising:
- a dry powder source;
- a pressurized air source;
- and
- a conduit connected to the dry powder source and to the pressurized air source and having an outlet to deliver dry powder onto the particulates as the particulates are sprayed with liquid in the Wurster apparatus.
Dependencies are inferred from the claim text.