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DIRECTION SIDESHOOTER BUBBLE JET PRINTHEAD

IP.com Disclosure Number: IPCOM000025965D
Original Publication Date: 1989-Jun-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

The roofshooter type thermal ink jet printhead 10, shown in schematic cross-sectional view in Figure 1, is capable of relatively high frequency operation (up to 15 kHz). It is speculated that one of the reasons for this is that the fluid 11 to form the drop 12 moves in the same direction as the main growth component, shown as arrows 16 of bubble expansion (i.e., the drop moves perpendicular to the heater 15 on heater plate 21). Therefore, much of the momentum imparted by the bubble 14 in its favored expansion direction (perpendicular to its plane) can be used to expel the drop from nozzle 13 of nozzle plate 17.