F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
117/109, 117/115
F26B 13/20 (2006.01)
Patent
CA 1255165
TITLE IMPROVED SETTING/DRYING PROCESS FOR FLEXIBLE WEB COATING ABSTRACT OF THE INVENTION A process for preparing a defect-free dry coated flexible web, e.g., plastic film, paper, comprising transporting a web freshly coated on one side, in floating and substantially flutter-free condition through a setting/drying zone having a series of sections each section having at least one push-type and one draw-type gas discharge device, e.g., air bar and air foil, respectively, impinging the web on the side opposite to the freshly coated side at an angle, respectively, of substantially 90° and 0.5° to 5° relative to the transport direction of the moving web whereby a wave form, e.g.. a single wave form such as a sinusoidal wave, having a repeating cycle of about 10 to 60 inches (25.4 to 152.4 cm) is produced in the web. The set web coating can be subsequently dried in a web drying zone, if required. The defect-free film is useful as an x-ray film, industrial testing film, graphic arts film, photosensitive element, plastic coated film or paper.
537591
Shu Ming-Tsai
Thomas William R. Jr.
Wehner Ann M.
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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