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Coating apparatus and method
| Details |
Inventors: Kanke, Shin;
Assignee: Fuji Photo Film Co., Ltd. (Kanagawa, JP)
Primary Examiner: Fiorilla; Chris
Assistant Examiner: Koch; George
Attorney, Agent or Firm: Young & Thompson
A coating apparatus and method are disclosed in which even if poor coating occurs in a lower-layer, no poor coating occurs in an upper-layer formed on the lower-layer. A pre-wet liquid coating device is disposed between a first coating device at the upstream side of a support web conveying direction, and a second coating device disposed at the downstream side. When an uncoated portion is formed by the first coating device, a pre-wet liquid is coated by a pre-wet liquid coating device, and the coating liquid can be reliably coated by the second coating device. When the pre-wet liquid coating device is removed from the support web, first, the pre-wet liquid coating device is brought into liquid-running out state, and thereafter, removed from the support web. Accordingly, the pool of pre-wet liquid is eliminated and occurrence of a thickly coated portion on the support web can be prevented. |
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DETAILED DESCRIPTION In view of the above-described circumstances, it is an object of the present invention to provide a coating apparatus and method in which even if poor coating occurs in a lower layer, no poor coating occurs in an upper layer formed on the lower layer.
A first aspect of the present invention is a coating apparatus which forms a plurality of layers on a continuously travelling base material, comprising: an upstream-side coating section which coats (applies) a first coating liquid to the base material to form a lower layer; a downstream side coating section disposed at the downstream side of the upstream-side coating section in a direction to which the base material is conveyed, and coating (applying), onto the lower layer, a second coating liquid of which composition is the same as or different from that of the first coating liquid, to thereby form an upper layer; an undercoat liquid coating section disposed so as to move close to or away from the base material, when an uncoated portion, which is a portion to which no first coating liquid is coated, is generated at a time of forming the lower layer, the undercoat liquid coating section being contacted the base-material before the uncoated portion reaches the undercoat liquid coating section and coating (applying) an undercoat liquid to the uncoated portion, and when coating of the first coating liquid is restarted, the undercoat liquid coating section being removed from the base material after a lower layer formed again reaches the undercoat liquid coating section and stopping coating of the undercoat liquid; and a liquid run-out section which, at the latest, just before the undercoat liquid coating section is removed from the base material, stops coating of the undercoat liquid for the base material by making the undercoat liquid coating section into a state of running out of the liquid.
In the above-described coating apparatus, the first coating liquid is coated to the base material by the upstream-side coating section to thereby form the lower layer, and thereafter, the second coating liquid is coated to the lower layer by the downstream-side coating section to thereby form the upper layer
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LCD 
