Patent ID: 6264319
Filing Date: 2001-07-24
Classification: B41J

Abstract:
A pressure change accommodating device for mounting to a wall of a fluid container over a pressure release aperture through the wall, the pressure change accommodating device comprising:(a) a base plate having a first side, and a second side hermetically sealable to the wall of the fluid container, said base plate including a fluid flow aperture formed from said second side through said first side for aligning with the pressure release aperture through the wall;(b) a fluid impermeable and flexible film material mounted to said first side of said base plate, said fluid impermeable and flexible film material forming a bellows member defining an auxiliary chamber for accommodating a pressure change in an internal pressure of fluid in the fluid container;(c) a protective shell member mounted to said base plate over said fluid impermeable and flexible film material for defining a protective chamber over said fluid impermeable and flexible film material; and(d) a vent hole formed through said shell member for communicating between said protective chamber and an environment external to the pressure change accommodating device.