Edge guide of curtain coater

Abstract

Provided is an edge guide (1) which is improved in retainability and stability. The edge guides are provided in a pair to prevent neck-in. The edge guide (1) has a supply opening (25) for supplying a liquid lubricant (h) near the upper end of the inside face (19), and an intake opening (26) for taking in the liquid lubricant near the lower end of the inside face (19). In the belt-like zone between the liquid lubricant supplying opening (25) and the liquid lubricant intake opening (26) on the inside face (19), a groove (21) is provided for flow of the liquid lubricant. The outer sides of the groove (21) have respectively an inclined face (22), and the both sides of the groove rise to form sharp edges. The position of the upper end of the edge guide (1) is adjustable in the web progress direction, the web breadth directions, and vertical up-and-down directions relative to the lower end of the guide plate (5).

Description

Technical field [0001] The present invention relates to curtain coaters and in particular to edge guides for such curtain coaters. Background technique [0002] Coated papers such as printing paper, pressure-sensitive paper, and thermal paper used in catalogs, etc. are produced by applying a coating material to a base material (web) of paper using a coater and then drying it. A machine that applies paint in this way is called a coating machine. Among such coating machines in the past, blade coaters, rod coaters, and air knife coaters using post-measurement methods have been the mainstream. The so-called post-measurement method is a method in which excess paint is applied to the base material at once, and then is scraped off with a scraper or rod, or blown away with an air knife to measure (measure) the paint. However, in coating based on such a post-measurement method, due to the hydraulic pressure or the pressing force of a scraper or the like when applying the paint to t...

AI Technical Summary

Problems solved by technology

[0027] C. Since the overall width of the groove portion n of the edge guide main body o is 10 to 12 mm, which is relatively wide, when the position of the substrate w of the curtain film c in the direction of travel is fluctuated by the influence of the teapot phenomenon and wind, etc., the curtain will be damaged. Both ends of the curtain c are easy to move within the entire width of the groove n, but the original flow path is dry and sticks to the Figure 7 The top of the peak shown, becomes the main cause of the edge disorder of the curtain film c

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