Method and apparatus for pressurizing ink in a printer ink supply using spring force

摘要

The present invention is a constant pressure ink supply for use in a printing system. The ink supply includes a flexible fluid reservoir for containing a quantity of fluid, and a spring which has an expanded position, and a contracted position. The spring is configured to operatively engage the flexible ink reservoir as the spring transitions from the expanded position to the contracted position and wherein the flexible fluid reservoir is biased by the spring as the spring contracts to produce fluid at a substantially constant fluid pressure at a fluid outlet.