Discharging and dust removing method and discharging and dust removing apparatus

A discharging method wherein positive and negative ions are irradiated upon a travelling working object to discharge the working object, comprising the steps of:

• passing the working object between a positive and negative ion producing discharging electrode apparatus and an ion attracting electrode apparatus disposed in an opposing relationship to said positive and negative ion producing discharging electrode apparatus, said positive and negative ion producing discharging electrode apparatus including a positive ion producing electrode and a negative ion producing electrode;
• applying, while the working object passes between said positive and negative ion producing discharging electrode apparatus and said ion attracting electrode apparatus, a positive voltage to said positive ion producing electrode to produce positive ions and a negative voltage to said negative ion producing electrode to produce negative ions;
• and
• simultaneously applying an ac voltage to said ion attracting electrode apparatus to induce positive and negative potentials in the working object to attract the positive and negative ion produced by said positive and negative ion producing discharging electrode apparatus.

A discharging and dust removing method wherein positive and negative ions are irradiated upon a travelling working object to discharge the working object and then air is jetted to the working object to remove dust or some other foreign articles from the working object, comprising the steps of:

• passing the working object between a positive and negative ion producing discharging electrode apparatus and an ion attracting electrode apparatus disposed in an opposing relationship to said positive and negative ion producing discharging electrode apparatus;
• applying;
• while the working object passes between said positive and negative ion producing discharging electrode apparatus and said ion attracting electrode apparatus, positive and negative voltages alternately to said positive and negative ion producing discharging electrode apparatus to alternatively produce positive and negative ions;
• simultaneously applying an ac voltage to said ion attracting electrode apparatus to induce positive and negative potentials in the working object to attract the positive and negative ions produced by said positive and negative ion producing discharging electrode apparatus;
• and
• thereafter jetting air to the working object while the working object is travelling to remove dust or some other foreign articles from the working object.