Patent ID: 7025830
Filing Date: 2006-04-11
Classification: B05C,B05D,G03C

Abstract:
1. A coating apparatus which forms a plurality of layers on a continuously travelling base material, comprising: an upstream-side coating section which coats 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, 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 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; wherein the undercoat liquid coating section is formed as a bar coating device including an undercoating bar which rotates in contact with the base material to coat the undercoat liquid thereto; and the liquid run-out section is formed as a speed reducer which makes the bar coating device into a state of running out of the liquid by reducing the number of rotations of the undercoating bar.