Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Patent
1991-10-18
1993-03-02
Padgett, Marianne
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
427317, 427557, 427596, B05D 306, B05D 302
Patent
active
051907917
ABSTRACT:
A process brings out a high contrast in natural grain of a naturally pale wood via infrared irradiation having a wavelength which is as long as possible. This infrared radiation can come from a conventional infrared emitter or, more preferably, from a carbon dioxide laser. Due to the contact-free heating near the surface which is effective in a stagnant ambient atmosphere, the new wood part of the grain is browned, while the harder old wood part remains essentially unbrowned. This causes the natural grain of the wood to stand out in contrast. Due to the contact-free and turbulence-free mode of operation of the heating, the grain pattern produced is uniform. Any scratches or chatter marks in the wood are simply covered over and remain invisible.
REFERENCES:
patent: 317730 (1885-05-01), Collings et al.
patent: 2375113 (1945-05-01), Klammt et al.
patent: 2867543 (1959-01-01), Braun
patent: 4044172 (1977-08-01), Bugg
patent: 4170668 (1979-10-01), Lee et al.
Patent Abstracts of Japan, 2 pages, Jul. 11, 1979, M Section, JP-A-54-56576 pub Jul. 5, 1979, abstract of, by Machitori.
Gunter Jurgen
Kohler Siegfried
Lang Siegfried
Lutz Erwin
Schellhorn Luise
Mercedes-Benz AG
Padgett Marianne
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