Koordination von Druck und Temperatur während des Tintenphasenwechsels

Details

Veröffentlichungs-Nr.

EP2484529

Aktenzeichen

EP12153584

Anmeldetag

2. Februar 2012

Veröffentlichung

8. April 2015

Erteilung

8. April 2015

Rechtsraum

EP

IPC

B41J2/175

Abstract

A print head assembly for an ink jet printer includes an ink flow path configured to allow passage of a phase-change ink. A pressure unit is fluidically coupled to the ink flow path to apply a pressure to the ink. The applied pressure is controlled by a control unit during a time that the ink in the ink flow path is undergoing a phase change. During the phase change, a portion of the ink in a first region of the ink flow path is in liquid phase and another portion of the ink in another region of the ink flow path is in solid phase. A constant or variable pressure can be applied at least to the liquid phase portion of the ink during a phase transition from a liquid phase to a solid phase or from a solid phase to a liquid phase. A print head assembly for an ink jet printer thus comprises: an ink flow path (510-520), the ink flow path configured to allow passage of a phase-change ink along the ink flow path; a pressure unit (555) configured apply pressure to the ink; and a control unit (550) configured to control the pressure applied to the ink and to coordinate the pressure applied to the ink with temperature of the ink during a time that the ink in the ink flow path is undergoing a phase change.

Anmelder

Firma

Palo Alto Research Center Incorporated

Land

🇺🇸 USA

Fachgebiete