Hewlett-packard Development Company, L.p.

Francisco Javier Perez Gellida

Mikel Zuza Irurueta

Antonio Gracia Verdugo

Jordi Arnabat Benedicto

Roger Bastardas Puigoriol

Juan Manuel Valero Navazo

Oriol Borrell Avila

Emilio Angulo Navarro

Raimon Castells De Monet

Juan Uroz Soria

Francisco Javier Rodriguez Escanuela

Santiago Sanz Ananos

Ezequiel Jordi Rufes Bernad

Marina Cantero Lazaro

Xavier Soler Pedemonte

Antonio Monclus Velasco

David Claramunt Morera

Jose Antonio Alvarez Tapia

Luis Fernando Martinez Nieto

Elena Laso Plaza

Lluis Hierro Domenech

Jesus Garcia Maza

Carlos Chover Lopez

Laura Sanchez Domingo

Eva Blay Lerin

Roger Bastardas Pulgoriol

David Toissaint

Antonio Garcia Verdugo

Jesus Ruiz Lluch

Ezequiel Jordi Rufes Bernard

Curing apparatus, image forming apparatus and articles of manufacture are disclosed. An example curing apparatus includes a curing unit to heat an area adjacent a substrate travel path, the curing unit having a width less than a width of the substrate travel path, and a controller to reciprocate the curing unit within the substrate width.

Curing apparatus, image forming apparatus, and articles of manufacture

In one example, a vapor control heater for a printer includes a housing, a heating element at least partially enclosed by the housing, and a fan to move air over the heating element and into a flow of air from the printer dryer.

Vapor control heating in a printer

In one example, a printer includes a paper path having a drying area, a printhead near the paper path upstream from the drying area, and a convection dryer to force air simultaneously into an upstream part of the drying area at a first density and into a downstream part of the drying area at a second density less than the first density and to force air into the upstream part of the drying area at a first air speed for a duration and then at a second air speed faster than the first air speed.

Drying control

A drying assembly is disclosed. An example apparatus includes fans; a temperature sensor; a print engine to access instructions to cause a printer to perform a printing operation on media; and a processor responsive to an output of the temperature sensor to control the fans to force air onto the media to cause a substantially uniform temperature to be maintained across a width of the media during the printing operation and to cause a sum of air flow output by the fans to be maintained at a substantially constant value.

Drying assembly

In one example, a print zone heater includes a structure defining a plenum, a heating element, a fan to move air over the heating element into the plenum, and a conduit from the plenum to carry heated air into the print zone.

Print zone heating

In one example, a heating system includes a first heater having a first resistive heating element, a second heater having multiple second resistive heating elements arranged in parallel with a group of the second heating elements having a combined resistance equal to a resistance of the first heating element, and a controller to periodically switch power between the first heating element and the group of second heating elements at a zero crossing of an AC power source.

Heating system control

A convection dryer device is disclosed. The convection dryer uses a first fan speed before the leading edge of media reaches a first location in a drying area and a second fan speed, faster than the first fan speed, after the leading edge of media reaches first location.

In an embodiment, a method of maintaining nozzles in a print-ready condition includes determining image content to be printed in an upcoming print swath, and for each ink color present within the image content, constructing an inked portion of an associated spit bar adjacent to the upcoming print swath to include the present ink color. For each ink color not present within the image content, an empty portion of an associated spit bar is constructed adjacent to the upcoming print swath.

Image content based spit bars

A method of heating a print zone disposed between a print-head and a media support device of a printing system includes supplying a first amount of power to a heating assembly to form and direct heated air in a first temperature range to the print zone of the printing system. The method also includes determining whether a temperature of the printhead is within a warning temperature range and, if so, supplying a second amount of power that is less than the first amount of power to the heating assembly to form and direct heated air in a second temperature range to the print zone. Otherwise, the first amount of power is continued to be supplied to the heating assembly.

Selectively heating a print zone of a printing system

Methods for curing ink printed on a print medium are disclosed. The methods comprise heating air to a temperature suitable for curing the ink, and blowing the air through a plurality of holes onto the print medium.

Printing apparatus and methods

A drying assembly is disclosed. The drying assembly has at least 2 fan units where each fan unit has a fan. The fan speed of each fan is adjusted independently to control the air temperature from the fan. The airflow through all of the fans is maintained at a constant value.

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.

Growing community of inventors

Sant Cugat del Valles, Spain

Francisco Javier Perez Gellida