Ink channel structure for inkjet printhead

US5594481A · kind A · utility

Assignee

• Hewlett-Packard Company, L.P. · US

Inventors

• Brian J. Keefe · Village of La Jolla, US
• May F. Ho · Lemon Grove, US
• Kenneth J. Courian · Portland, US
• Steven W. Steinfield · San Diego, US
• Winthrop D. Childers · San Diego, US
• Ellen R. Tappon · Corvallis, US
• Kenneth E. Trueba · Corvallis, US
• Terri I. Chapman · Escondido, US
• William R. Knight · Corvallis, US
• Jules G. Moritz, III · Corvallis, US

Key dates

• Filing date: Oct 6, 1994
• Grant date: Jan 14, 1997
• Expiry date: Oct 6, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2202/13
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is an inkjet print cartridge including an ink reservoir; a substrate having a plurality of individual ink firing chambers with an ink firing element in each chamber along a top surface of said substrate and having a first outer edge along a periphery of substrate; the first outer edge being in close proximity to the ink firing chambers. The ink firing chambers are arranged in a first chamber array and a second chamber array and with the firing chambers spaced so as to provide 600 dots per inch printing. An ink channel connects the reservoir with the ink firing chambers, the channel including a primary channel connected at a first end with the reservoir and at a second end to a secondary channel; the primary channel allowing ink to flow from the ink reservoir, around the first outer edge of the substrate to the secondary channel along the top surface of the substrate so as to be proximate to the ink firing chambers. A separate inlet passage defined by a barrier layer for each firing chamber connecting the secondary channel with the firing chamber for allowing high frequency refill of the firing chamber. The separate inlet passage for each firing chamber having peninsulas a…