Patent ID: 6153265
Filing Date: 2000-11-28
Classification: B05C,G03C

Abstract:
A process of applying a coating fluid to a continuously running web with an extrusion coating head pushed against the running web at a position between two adjacent run-guide means for retaining the running web, said coating head comprising:a front edge,a back edge positioned downstream with respect to a running direction of the web from said front edge and having an end opposite the web which slopes away from the web in the downstream direction,a coating fluid spouting slot, for spouting a coating fluid, defined by both of said edges, andcoating width regulation plates for regulating a width of the coating fluid spouted from a tip of said slot, one of said plates disposed on each of two side ends of said slot for applying the coating fluid to a surface of the web from said slot in a non-pressurized condition in a liquid seal state while scraping off part of a viscous fluid previously applied to said web by said front edge, said process comprising the steps of:positioning a nearest point to the web surface of a portion of an upper edge of said coating width regulation plate corresponding to said slot upstream from a center line of a width of said slot along the web running direction and such that an area given by a product of a distance between the nearest point and the web surface and the width of said slot is 1 mm to 6.times.10.sup.-5 mm.sup.2 ; andapplying the coating fluid to the running web.