Browse Prior Art Database

Paint Booth Ceiling

IP.com Disclosure Number: IPCOM000090569D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Hewins, TF: AUTHOR

Abstract

A ceiling for an electrostatic paint spraying booth has a replaceable charged member which repels over-sprayed paint. The accumulation of paint on the ceiling is kept to a minimum. Electrostatic spray painting is accomplished by passing grounded work pieces into a semicircular paint booth in which they are contacted by charged paint particles. The particles are atomized and propelled toward the work pieces by a combination of electrostatic and centrifugal forces resulting from feeding conductive paint particles to the center of a highly charged, reciprocating rotating disk. Cylindrical drum 1 is mounted at the top of paint booth 2 and has conductive metal band 3 which is connected to a source of high voltage 4 of the same polarity as the charge on the paint particles.

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Paint Booth Ceiling

A ceiling for an electrostatic paint spraying booth has a replaceable charged member which repels over-sprayed paint. The accumulation of paint on the ceiling is kept to a minimum. Electrostatic spray painting is accomplished by passing grounded work pieces into a semicircular paint booth in which they are contacted by charged paint particles. The particles are atomized and propelled toward the work pieces by a combination of electrostatic and centrifugal forces resulting from feeding conductive paint particles to the center of a highly charged, reciprocating rotating disk. Cylindrical drum 1 is mounted at the top of paint booth 2 and has conductive metal band 3 which is connected to a source of high voltage 4 of the same polarity as the charge on the paint particles. A sheet of heavy paper or plastic film, which is treated to render it fire retardant, is coated on its upper surface 6 with a conductive material such as paint containing a conductive pigment. The edge of the upper surface of sheet 5 is placed in contact with band 3 so that sheet 5 covers the open end of cylinder 1. Sheet 5 is then held in place by hoop 7 which is secured to the end of cylinder 1 over band
3. In operation, sheet 5 is charged by potential source 4 in contact with band 3 to a polarity which is the same as that of the paint particles. Over-sprayed paint particles are repelled downwardly so that they do not accumulate on the ceiling or on the overhead conveyer used t...