Improved Hydraulic Switching for Printers
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15
A technique is described whereby large-scale integration (LSI) concepts are applied to hydraulic switching elements so as to produce high speed, high resolution printers. In prior art, the use of hydraulic switching elements with latching characteristics has been considered a viable method of providing devices with logic capability. The concept described herein modifies the switching devices so that in one latched state, ink fluid can travel down a pipe, exit and hit a paper surface. In the other latched state, it is switched into another pipe that returns it to the ink reservoir. Arrays of pipes can be etched in a block, by using LSI fabrication techniques, and the open-ended pipe fabricated as shown in Fig. 1, thereby creating a multi-element printing device.