Coating method and apparatus utilizing controlled electrostatic charge
AssigneeFuji Photo Film Co., Ltd.
InventorMasato Yamaguchi
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Abstract
A coating method and coating apparatus with which layer surface defects caused by foreign matter such as dust particles and the like can be greatly reduced. The method and apparatus are characterized in that an static reducing device which reduces static charge on a support is provided. Before a coating solution for an emulsion layer is applied to the support web by a coating device, the static charge level of the support is reduced to 1 kV or less by a static eliminator. Thus, layer surface defects at a coated layer formed by coating are decreased.
Claims9
A method for coating at least a coating solution for an emulsion layer on a support, the method comprising the steps of:
- moving the support continuously while applying a back layer coating solution to a first face of the support;
- after applying the back layer coating solution, reducing a level of the electrostatic charge on the support material to no more than 1 kV;
- and
- within 20 seconds after reducing the level of the electrostatic charge, coating the coating solution for the emulsion layer onto a second face of the continuously moving support opposite the first face.
Dependencies are inferred from the claim text.