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INK CONNECTION SEALING SURFACE TO ACCOMMODATE A VARIABLE THICKNESS PRINTHEAD DIE

IP.com Disclosure Number: IPCOM000026942D
Original Publication Date: 1994-Aug-31
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal

Abstract

For a certain class of ink jet printheads, it is required to make a reliable seal between the ink delivery system and a substantially flat printhead die having ink inlet holes as shown in Figure 1, wherein Figure 1 is a top view of a thermal ink jet printhead die 10, having a plurality of ink inlet holes 20 and an ink seal area 22. A component (not shown) which has tubing connectors for ink delivery and optional vent, as well as a slotted sealing surface to mate to the printhead die, is known as an ink manifold. A screen printed wet seal approach was developed and deposits a uniform thickness of sealing material, such as silicone, in the narrow sealing regions of a thermal inkjet printhead die. While the printed material is still wet (uncured), the sealing surface of the manifold is brought into contact with the seal material on the printhead die, and the material is allowed to cure. Typically, the manifold has legs on both ends of the die, as well as posts further back to level the manifold. However, there exists a problem in determining the ideal height to make the legs and posts, as well as manufacturing these features to the required tolerances.