Hewlett-packard Development Company, L.p.

Carlos Chover Lopez

Emilio Angulo Navarro

Francisco Javier Perez Gellida

Francesc Ros Cerro

Joan-Albert Miravet Jimenez

Lluis Hierro Domenech

Oriol Parera Fiestas

Albert Ruzafa Villaret

A fluid supply device includes a variable fluid volume to contain a supply of fluid and a variable gas volume to receive pressurized gas to pressurize the supply of fluid. A method of monitoring the fluid supply device may include controlling a gas pressure of the pressurized gas to feed the fluid from the fluid volume, the gas pressure varying in a plurality of pressurization cycles; monitoring a parameter of the pressurization cycles; and determining a change in fill state of the fluid volume as a function of the monitored parameter.

Refill system and method

An example printing fluid container () comprising a container body () defining a cavity (), and a piston () located within the cavity (), is described. The piston () divides the cavity () into a first chamber () to receive printing fluid and a second chamber (), fluidically isolated from the first chamber (), to receive a positively pressurized fluid.

Printing fluid container

In one example, a platen system for a printer includes a group of interchangeable platens each configured to support a different type of print substrate in the printer.

Interchangeable printer platens

Growing community of inventors

Sant Cugat del Valles, Spain

Carlos Chover Lopez