Powder applicator for particulate material coating
AssigneeSpray Dynamics, Ltd.
InventorBarry W. Pentecost
Life of this patent
Estimating the term…
Abstract
A machine for coating particulate material includes a rotatable drum with a solid or perforated sidewall. A boom extends into the drum to support one or more spray nozzles and one or more powder applicators. Particulate material is introduced into the drum and subjected to a solution coating from the nozzles and a powder coating from the powder applicators, while the drum rotates. Air may flow through the perforated drum to facilitate drying of the coating solution and powder. The powder applicators are individually regulated so as to provide even distribution of the powder throughout the length of the drum.
Claims20
A machine for coating particulate material, comprising:
- a rotatable drum;
- at least one spray nozzle in the drum for spraying a solution onto particulate material in the drum;
- at least one powder pump in the drum for depositing powder onto the particulate material in the drum.
A method of coating particulate material, comprising:
- depositing particulate material into a rotating drum such that the material tumbles in the drum;
- spray a solution through a plurality of spray nozzles onto the material;
- dispensing powder through a plurality of powder applicators onto the material;
- and
- drying the material in the drum.
A machine for coating particulate material, comprising:
- a rotatable drum;
- a boom extending into the drum;
- a plurality of spray nozzles mounted on the boom;
- a plurality of powder applicators mounted on the boom;
- a solution tube for supplying solutions to the nozzles;
- a powder tube for supplying powder to the applicators;
- a plurality of air hoses, each being connected to one of the powder applicators;
- and
- a control system for individually operating each of the applicators.
Dependencies are inferred from the claim text.