High density nozzle array for inkjet printhead

US5638101A · 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: Jun 10, 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

Described 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; said ink firing chambers arranged in a first chamber array and a second chamber array and said firing chambers spaced so as to provide 600 dots per inch printing; an ink channel connecting said reservoir with said ink firing chambers, said channel including a primary channel connected at a first end with said reservoir and at a second end to a secondary channel; a separate inlet passage for each firing chamber connecting said secondary channel with said firing chamber for allowing high frequency refill of the firing chamber; a group of said firing chambers in adjacent relationship forming a primitive in which only one firing chamber in said primitive is activated at a time; a first circuit on said substrate connected to said firing elements; and a second circuit on said cartridge connected to said first circuit, for transmitting firing signals to said ink firing elements at a predetermined frequency. The preferred configuration of the nozzle member, ink channels, and firing chambers allows a printing resoluti…