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US 6,444,270 B1Granted
Photo film coating method for coating web-shaped base material
AssigneeFuji Photo Film Co., Ltd.
InventorYasuhito Naruse
Life of this patent
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Abstract
In a coating method using a coating rod, the coating rod is rotated in the reverse direction with respect to the running direction of the web, and the absolute value of V1/V2 is set between 0.0001 and 0.06, where V1 (cm/sec) is a rotating speed of the rod and V2 (cm/sec) is a running speed of the web.
Claims2
A coating method for coating a continuously-running web with a coating liquid, the method comprising the steps of:
- applying an excess of the coating liquid on the web to form a coating layer on the web. and
- removing a surplus of the coating liquid from the coating layer with a rod, the rod being in contact with the coating layer and being rotated in a reverse direction with respect to a running direction of the web,
- wherein μ×V2/σ is at least 0.025 and, an absolute value of V1/V2 is set between 0.0001 and 0.06, where μ(cP) is a viscosity of the coating liquid, σ (dyne/cm) is a surface tension of the coating liquid, V1 (cm/sec) is a rotating speed of the rod and V2 (cm/sec) is a running speed of the web.
Dependencies are inferred from the claim text.