Browse Prior Art Database

Original Publication Date: 1998-Jun-30
Included in the Prior Art Database: 2004-Apr-08

Publishing Venue

Xerox Disclosure Journal


A tack pad is proposed which has different stiffness (durometer) in two different areas of the pad. The pad is used to apply a fluid seal during assembly of ink jet cartridges. The fluid seal is a thin sheet of teflon with a mylar stiffener. It has a particular geometry and is coated on both sides with adhesive. The pad presses the fluid seal into contact with a housing which is part of the fmal cartridge assembly. The pad must bend the mylar stiffener in regions where the housing is sloped in order to contact the housing. However, the pad must avoid bending it in regions where the fluid seal must be assembled so as to span grooves in the housing without being pressed down into the grooves. The pad is made with different degrees of stiffness in the specific areas where it either must or must not bend the mylar stiffener. For example, a pad was molded that was 90 durometer in the die placement area and 60 durometer elsewhere.