Ink container, ink and ink jet recording apparatus using ink container

A liquid container for a liquid jet recording apparatus, comprising:

• a first chamber containing negative pressure producing material and having a liquid outlet arranged, in use, at a lower part of the container and connectable to a liquid jet head to supply liquid from the container to the liquid jet head and an air vent for allowing ambient air into the container, wherein said liquid outlet is provided in a bottom portion of said first chamber,
• a second chamber communicating with the first chamber by a communication path, except for which said second chamber is substantially hermetically sealed and which is disposed in use at the lower part of the container, said second chamber providing a liquid reservoir for the first chamber;
• and
• ambient air introducing means comprising an air path substantially free of negative pressure producing material having an inlet in the first chamber separated from the air vent by the negative pressure producing material and an outlet arranged to be lower than the inlet during use of the container to enable air to be supplied to the second chamber through the negative pressure producing material and the air path as liquid is withdrawn from the liquid outlet.

A liquid container for a liquid jet recording apparatus, comprising:

• a first chamber containing negative pressure producing material and having a liquid outlet connectable to a liquid jet head to supply liquid from the container to the liquid jet head and an air vent for allowing ambient air into the container, wherein said liquid outlet is provided in a bottom portion of said first chamber;
• a second chamber communicating with the first chamber by a communication path, except for which said second chamber is substantially hermetically sealed;
• and
• an ambient air introducing path for introducing the ambient air into said second chamber by permitting air-liquid exchange at said communication path when the liquid is supplied out through said liquid outlet while a liquid level in said first chamber is above said communication path, said ambient air introducing path being provided as a gap formed by said negative pressure producing material being apart from an inside surface of said first chamber.

A liquid container for a liquid jet recording apparatus, comprising:

• a first chamber containing negative pressure producing material and having a liquid outlet connectable to a liquid jet head to supply liquid from the container to the liquid jet head and an air vent for allowing ambient air into the container, wherein said liquid outlet is provided in a bottom portion of said first chamber;
• a second chamber communicating with the first chamber by a communication path, except for which said second chamber is substantially hermetically sealed;
• and
• an ambient air introducing path for introducing the ambient air into said second chamber by permitting air-liquid exchange at said communication path when the liquid is supplied out through said liquid outlet while a liquid level in said first chamber is above said communication path, said ambient air introducing path being provided as a gap formed between said negative pressure producing material and an inside surface of said first chamber.

A liquid container for a liquid jet recording apparatus, comprising:

• a first chamber containing negative pressure producing material and having a liquid outlet connectable to a liquid jet head to supply liquid from the container to the liquid jet head and an air vent for allowing ambient air into the container;
• a second chamber communicating with the first chamber by a communication path, except for which said second chamber is substantially hermetically sealed;
• and
• ambient air introducing means for introducing the ambient air into said second chamber by permitting air-liquid exchange at said communication path when the liquid is supplied out through said liquid outlet while a liquid level in said negative pressure producing material in said first chamber is above said communication path, said ambient air introducing means being formed between said negative pressure producing material and an inside surface of said first chamber.