Coating method and apparatus
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United States of America Patent
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Dec 25, 1984
Grant Date -
N/A
app pub date -
Apr 15, 1983
filing date -
Apr 16, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A slide bead coating method and apparatus for applying a coating solution onto an advancing web includes an air compressed chamber for keeping a lower side of a solution bead in a pressure-applied condition to produce a difference in pressure between the upper side and the lower side of the solution bead to stabilize the bead. A coating solution which has a low viscosity and good wetting properties can thus be applied onto the web at high speeds and in a thin layer form, and a so-called bead-dropping phenomenon is avoided. Therefore, the preparation of a layer for photo-sensitive materials is facilitated.
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