Patent ID: 6431696
Filing Date: 2002-08-13
Classification: B41J

Abstract:
A liquid accommodating container connected to an ink jet head and accommodating a liquid supplied to said ink jet head, said container comprising:a partition for dividing said liquid accommodating container into a first chamber and a second chamber, said first chamber having a supply portion for supplying the liquid to said ink jet head and an atmosphere communicating section communicated with an atmospheric air, and said second chamber being communicated with said first chamber through a liquid communicating section and being substantially sealed except said liquid communicating section, said second chamber accommodating the liquid to be supplied to said first chamber; and a negative pressure generating member inserted into and held by said first chamber with compression; wherein said first chamber has a cross-section of substantially rectangular shape taken along a plane perpendicular to a direction of insertion of said negative pressure generating member, and inside corners of said rectangular shape are curved with the curved corners extending in the direction of insertion; wherein said negative pressure generating member is compressed in a direction of insertion; and wherein the curved corners of said first chamber are contacted by said negative pressure generating member, which is compressed by the curved corners.