A device used to apply a coating to the surface of a paper that applies a thick layer of surplus coating to a paper web (often utilizing an applicator roll) then uses a flexible blade to scrape away the excess coating, leaving a desired level amount of coating on the paper. A blade coater produces an extremely level coating surface. There are a number of different types of blade coaters (see, for example, short-dwell coater) and blade coating is the most popular method of coating papers. (See Coating.) Particles caught behind the blade, however, can cause paper defects such as a blade scratch, a blade cut, or blade streak.
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