Patent ID: 6183075
Filing Date: 2001-02-06
Classification: B41J

Abstract:
An ink container for containing ink for ink jet recording, comprising:an inner container having a plurality of adjacent accommodating chambers for accommodating the ink and ink supplying portions corresponding to respective accommodating chambers;an outer casing for enclosing an outer side of said inner container, wherein the outer casing is substantially-polygonal-prism shaped, and the inner container has a substantially flat surface which first deforms with consumption of liquid; anda common air vent common to all of said accommodating chambers and formed in said outer casing;wherein a negative pressure is produced in said ink container when the ink is discharged from said ink container;wherein said inner container and outer casing are composed of resin materials which are substantially non-stretched, and adjacent ones of said chambers of said inner container are composed of the substantially non-stretched material and closely contact each other in an initial stage in which said container is filled with the ink and are deformable independently from each other when the ink is discharged from said ink container while producing a negative pressure in the chambers,wherein the resin materials of said inner container and said outer casing have different thermal contraction rates,wherein the inner container has corners corresponding to corners of the outer casing andwherein the outer casing has inner container deformation limiting portions for limiting deformation of said inner container.