Patent ID: 6257711
Filing Date: 2001-07-10
Classification: B41J

Abstract:
A liquid filling method for filling a liquid cartridge with liquid for recording to be supplied to a recording head, the method comprising the steps of:providing said liquid cartridge having a negative pressure producing material accommodating portion and a liquid accommodating portion, said negative pressure producing material accommodating portion accommodating a negative pressure producing material and having an air vent and a liquid supply port, and said liquid accommodating portion having a liquid filling opening and accommodating directly the liquid to be supplied to the recording head, said liquid cartridge further including a partition wall between said negative pressure producing material accommodating portion and said liquid accommodating portion, said partition wall having a gap for supplying liquid from said liquid accommodating portion to said negative pressure producing material accommodating portion, said gap being formed between said partition wall and a bottom wall of said cartridge;inserting a liquid filling member through said liquid filling opening and sealing said liquid filling opening, wherein a sealed state is established between said liquid filling opening and said liquid filling member when said liquid filling member is in said liquid filling opening;orienting the liquid cartridge such that said gap is disposed at a top location of said liquid accommodating portion; anddirectly filling the liquid through said liquid filling member into said liquid accommodating portion, with said negative pressure producing material accommodating portion being open to ambience.