Plastic powder coated metal strip
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United States of America Patent
Stats
-
Jan 5, 1993
Issued Date -
N/A
app pub date -
Mar 5, 1991
filing date -
Feb 14, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Process and apparatus for forming a plastic coating on a metal strip. A metal strip is cleaned, surface treated, coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the strip, inductively heated to above the melting point of the powder, and maintained in an infrared heater until the fused powder is flowed into a coating having a smooth surface and a uniform thickness. Thermoplastic and thermosetting coatings, having thicknesses of at least 10 microns formed using total induction and infrared heating times of less than 60 seconds, can be fabricated without cracking.
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Patent Citation Ranking
- 13 Citation Count
- B05B Class
- 54.52 % this patent is cited more than
- 32 Age