Importance

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Abstract

An apparatus and method of use for spraying powder on substrate which is particularly suited for use in conjunction with a printing press for automatically applying a fine powder onto printed sheets prior to delivery to a stacking station. The electrically controlled and motor driven apparatus comprises a pressurized air source, a powder hopper with a powder agitator contained therein, a brush unit which transfers powder from the powder hopper and, through the use of a flicker bar, mixes powder with air to create an air and powder mixture in a powder chamber. Pressurized air passing through a venturi upwardly vacuums this mixture and propels the air and powder mixture through a selectable series of pneumatic hoses to nozzles with an adjustable width of spray for spraying powder on printed sheets.

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First Claim