Patent ID: 6991326
Filing Date: 2006-01-31
Classification: B41J

Abstract:
1. An ink cartridge, comprising: an ink containing section including an ink absorbing body made of a porous material for retaining ink, the ink cartridge satisfying: where C is a coefficient of C=1.88×10 5 ; μ is a viscosity of the ink in Pa·s; L is a height in meter of the ink absorbing body when the ink absorbing body is contained in a compressed state in the ink containing section; Q is a maximum amount of ink, expressed in cubic meter per second, ejected from a nozzle through which the ink containing section ejects ink; N is a cell density, expressed in the number of pores per inch, of the ink absorbing body before the ink absorbing body is contained in the ink containing section; R is a compressibility, which is a volume ratio of the ink absorbing body when the ink absorbing body is contained in a compressed state in the ink containing section to the ink absorbing body before the ink absorbing body is contained in the ink containing section; S is a cross-sectional area of the ink absorbing body, expressed in square meter, when the ink absorbing body is contained in a compressed state in the ink containing section; T is a surface tension of the ink, expressed in Newton per meter, absorbed in the ink absorbing body; and D is a diameter of the nozzle expressed in meter.