Patent ID: 8333861
Filing Date: 2012-12-18
Classification: B41J,Y10T

Abstract:
1. A method for forming a reservoir for holding ink in an ink tank for an inkjet printhead, the method comprising: a) providing a housing including a back wall and a side wall extending from the back wall; b) inserting a spring into the housing such that a first end of the spring contacts the back wall of the housing; c) placing a first surface of a plate against a second end of the spring; d) providing a flexible sheet; e) bringing the flexible sheet into contact with the side wall of the housing containing the spring; f) welding the flexible sheet to the edge of the side wall of the housing while applying a first level of vacuum between the flexible sheet and the back wall of the housing; and g) applying heat to the flexible sheet in a region corresponding to the plate while applying a second level of vacuum between the flexible sheet and the back wall of the housing, wherein the second level of vacuum is greater than the first level, thereby causing the sheet to conform to a second surface of the plate that is opposite the first surface of the plate, as well as to internal features of the housing.