| 摘要 |
A web charging apparatus comprising a first grounded electrode being a roller contacting a whole width of a first surface of a moving continuous web, a discharge electrode facing said first grounded electrode across the web, and a second grounded electrode having a horizontal central portion and two distal ends, said second grounded electrode being arranged behind said discharge electrode, relative to said first grounded electrode, both of said distal ends of said second grounded electrode being bent toward the web, wherein a corona discharge is established between said first grounded electrode and said discharge electrode via the web by which electrostatic charges are deposited on a second surface of the web, such that a ratio of surface electrostatic potential at widthwise edge parts of the web to a surface electrostatic potential at a widthwise central part of the web is not less than 0.78 and not more than 1.5, and wherein said web charging apparatus is arranged at an upstream side of a coating apparatus continuously coating the web with a coating solution. <IMAGE>
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