Curtain coating method and curtain coating apparatus

A curtain coating apparatus comprising:

• a slit from which at least one layer of a coating liquid is ejected,
• a curtain edge guide configured to guide the ejected coating liquid in the form of a curtain liquid film and make the coating liquid fall freely, while providing an auxiliary liquid along a curtain edge guide surface provided in contact with the coating liquid, so as to apply the coating liquid onto a continuously running web, and
• a ledge which supports the curtain liquid film at a bottom of the curtain edge guide,
• wherein the ledge is configured to move to remove a residue of the coating liquid from the ledge,
• wherein the ledge is disc-shaped and is configured to rotate, and
• wherein a radius of the ledge is in a range of 10 mm to 50 mm.