Short-dwell coater for coating a web with coating

专利名称：Short-dwell coater for coating a web with

coating mix

发明人：Juhani Eskelinen申请号：US07/120476申请日：19871113公开号：US04873939A公开日：19891017

摘要：A short-dwell coater coats a web positioned against a backing roll with coatingmix. The coater comprises a front lip as a part of the coater support structure, a feederdevice adjacent the front lip for feeding the coating mix onto the paper web, a mouthpiece (4, 5) forming an extension of the feeder device and forming an application zone (8)against the web (9), and a doctor blade mounted rearward of the application zone withrespect to the forward machine direction. This blade doctoring the excess coating mixaway from the web. The coater further comprises an intermediate lip (6) positionedbetween the feeder device and the doctor blade in conjunction with the front lip andforming together with web a space capable of acting as the application zone. Thisapplication zone will have a wedge-shaped cross-section tapering in the forward machinedirection so that a side of the intermediate lip facing the doctor blade forms an obtuseangle with the exiting web in order to prevent the reflow of the doctored coating mix tothe application. This coater can be used at high web speed and will prevent blending ofthe coating mix and doctored coating mix.

申请人：VALMET PAPER MACHINERY INC.

代理机构：Birch, Stewart, Kolasch & Birch

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