FLUID CONTAINER, RECYCLING METHOD OF FLUID CONTAINER, METHOD FOR PIERCING COVER FILM OF FLUID CONTAINER, PIERCING JIG, AND METHOD FOR MANUFACTURING FLUID CONTAINER

摘要

A piercing method for forming an opening in a cover film welded to an ink cartridge in such a manner as to cover first and second ink inlet holes is provided. The method includes: forming a cut in the cover film in such a manner as to provide a cut piece supported in a cantilever manner in a covering area of the cover film that covers the first and second ink inlet hole; and forming the opening in the cover film by causing the cut piece to hang down in the first and second ink inlet holes.