Patent ID: 6086675
Filing Date: 2000-07-11
Classification: H01T

Abstract:
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;a second grounded electrode arranged behind said discharge electrode relative to said first grounded electrode; andan adjuster for moving said second grounded electrode to adjust a distance between said discharge electrode and said second grounded electrode such that a distance between said discharge electrode and said second grounded electrode at a lengthwise central part of said discharge electrode facing a widthwise central part of the web is larger than a distance between said discharge electrode and said second grounded electrode at two distal end parts of said discharge electrode facing widthwise edge parts of 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; andwherein said web charging apparatus is arranged at an upstream side of a coating apparatus continuously coating the web with a coating solution.