Coating apparatus – With indicating – testing – inspecting – or measuring means – With means for visual observation
Patent
1990-10-23
1992-09-15
Woo, Jay H.
Coating apparatus
With indicating, testing, inspecting, or measuring means
With means for visual observation
15345, 15346, 15422, 118 46, 118 50, 118 56, 118 63, 118309, 118312, 118324, 118326, 118DIG7, B05B 714
Patent
active
051468689
ABSTRACT:
A self contained recirculating powdering and vacuuming assembly and the airflow discharge manifold therfor. The vacuum assembly includes a blower operably connected within a housing having a low and high pressure region. A powder tray is mounted beneath a first outlet at the bottom of the low pressure region and is structured to hold a quantity of powder for controlled depositing onto paper stock having a wet ink coating on preselected areas of the paper stock. This first outlet sealably transfers powder collected in the low pressure region back into the powder tray, which powder is transported by conveyor beneath the powder tray. A vacuum passage extends downward from a low pressure region inlet to a powder pickup slot positioned adjacent to the area where the powder is deposited onto the paper stock. Pressurized air is directed toward the pickup slot from either side thereof by the airflow discharge manifold which receives air from the high pressure region outlet. By being in very close proximity above the conveyor, very little air or loose powder fails to be drawn up throug the powder pickup slot for recirculation through the assembly.
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Davis Robert B.
Prescott Charles J.
Woo Jay H.
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