Sealing method of remanufactured liquid container
A method for sealing an ink cartridge is disclosed. A cover film is bonded to the ink cartridge in such a manner as to cover an ink inlet hole formed in the ink cartridge. An opening is formed in the cover film in such a manner as to communicate with the hole of the ink cartridge. The method includes preparing a seal film and bonding the seal film to the cover film with a bonding strength smaller than the bonding strength of the cover film with respect to the ink cartridge in such a manner that the seal film becomes peelable from the cover film, thereby sealing the opening of the cover film.
1. A liquid container comprising:
a hole forming surface in which a hole is formed;
a cover film bonded to the hole forming surface in such a manner as to cover the hole, the cover film having an opening communicating with the hole; and
a seal film sealing the opening of the cover film, the seal film being bonded to the cover film in such a manner that the seal film becomes peelable from the cover film,
wherein the cover film is formed by stacking a plurality of films including a bonding layer film and a surface layer film, the bonding layer film being welded to the hole forming surface, the surface layer film being arranged to be exposed to the side corresponding to a surface of the cover film,
wherein the seal film is formed by stacking a plurality of films including a first film and a second film, the first film being welded to the surface layer film, the second film being arranged to be exposed to the side corresponding to a surface of the seal film, and
wherein the surface layer film and the second film melt at a melting point higher than the melting point of the first film and exhibit higher heat resistance than the first film.
2. The liquid container according to claim 1 , wherein the cover film is welded to the liquid container, and wherein the seal film is welded to the cover film with a welding strength
smaller than the welding strength of the cover film with respect to the liquid container.
3. The liquid container according to claim 1 , wherein the seal film has a surface that is formed of a resin material and welded to the cover film, and wherein the cover film has a surface that is formed of a resin material of a type different from the type of the resin material of the seal film and welded to the seal film.
4. The liquid container according to claim 1 ,
wherein the bonding layer film and the hole forming surface are formed of resin materials of a same type, and
wherein the surface layer film and the first film are formed of resin materials of different types.
5. The liquid container according to claim 1 , wherein the seal film has a portion that is not bonded to the cover film.
6. The liquid container according to claim 1 , wherein the hole is a liquid inlet hole through which a liquid is introduced into the liquid container, and wherein the cover film has an opening formed in a portion of the cover film that covers the liquid inlet hole.