Printing fluid circulation

US12138937B2 · kind B2 · utility

Assignee

• HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

• Daniel D. Dowell · Albany, US
• Ronald J. Ender · Corvallis, US
• Seth Haddix · Corvallis, US
• Jon A. Crabtree · San Diego, US
• Jeffrey F. Bell · Corvallis, US

Key dates

• Filing date: May 29, 2020
• Grant date: Nov 12, 2024
• Expiry date: Oct 4, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2202/12
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An example printing fluid pen comprises a plurality of fluid ports, including an inlet port to direct fluid from a fluid reservoir to a fluid ejection device, and a recirculation port to direct fluid from the fluid ejection device out of the inkjet pen. The example pen also includes a plurality of parallel fluid pressure regulators fluidly coupled with the inlet port, each of the plurality of parallel fluid pressure regulators to receive fluid from the inlet fluid port.