Patent ID: 6419349
Filing Date: 2002-07-16
Classification: B41J

Abstract:
A liquid storage tank comprising:a negative pressure generating member accommodating compartment for accommodating a negative pressure generating member consisting of a fiber material, and having a liquid supplying portion and an atmosphere connecting portion with the atmosphere, a liquid storing compartment for storing liquid to be supplied to the negative pressure generating member accommodating compartment, and having a connecting portion with said negative pressure generating member accommodating compartment and forming an almost closed space, a separating wall separating said negative pressure generating member accommodation compartment from said liquid accommodating compartment and forming said connecting portion and an air importing portion for importing air from said negative pressure generating member accommodating compartment to the liquid accommodating compartment, said air importing portion being formed in the vicinity of said connecting portion, and anti-collapse means to suppress unnecessary collapse in said negative pressure generating member in the vicinity of said air importing portion, said anti-collapse means having a constitution to relax a contact status with a wall facing opposite said separating wall in the vicinity of said air importing portion, said wall having concave portions formed thereon.