Hewlett-packard Development Company, L.p.

Roger Bastardas Puigoriol

Francisco Javier Perez Gellida

Mikel Zuza Irurueta

Juan Manuel Valero Navazo

Oriol Borrell Avila

Santiago Sanz Ananos

Antonio Gracia Verdugo

Raimon Castells De Monet

Emilio Angulo Navarro

Xavier Soler Pedemonte

Antonio Monclus Velasco

Ezequiel Jordi Rufes Bernad

Marina Cantero Lazaro

David Claramunt Morera

Francisco Javier Rodriguez Escanuela

Elena Laso Plaza

Jesus Garcia Maza

Eva Blay Lerin

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

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 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

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.

Examples are provided of controlling sheet media dryers. A controller operates a fan at plural duty cycles and correlates a resulting air pressure to each to define empirical data pairs. A parabolic curve fit to the empirical data is used to derive additional data pairs, and a lookup table is defined using the empirical and derived data pairs. The controller uses the lookup table to operate the fan during normal operations of a sheet media dryer.

Control of air-based media dryer

Growing community of inventors

Sant Cugat del Valles, Spain

Roger Bastardas Puigoriol