EP 0493039 A2 19920701 - Thermal ink jet printhead having an increased drop velocity.
Title (en)
Thermal ink jet printhead having an increased drop velocity.
Title (de)
Wärme-Tintenstrahldruckkopf mit gesteigerter Tropfengeschwindigkeit.
Title (fr)
Tête d'impression à jet d'encre thermique avec une vitesse élevée de gouttelettes.
Publication
Application
Priority
US 63115290 A 19901220
Abstract (en)
A thermal ink jet printhead for ejecting and propelling ink droplets on demand is disclosed. The ink droplets travel along a flight path from orifices in the printhead toward a recording medium such as paper by momentarily heating the ink. The printhead includes at least the elongated channel that forms a straight ink flow path therethrough. The channel has an orifice at one end and an inlet at the other end for communicating with an ink reservoir. A heating element is disposed inside the channel and it has a surface that contacts the ink. A constrictor is placed in the channel near the orifice so that the velocity of the ink flow through the orifice is increased. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
B41J 2/1404 (2013.01); B41J 2002/14379 (2013.01); B41J 2202/11 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0493039 A2 19920701; EP 0493039 A3 19930224; JP H071729 A 19950106
DOCDB simple family (application)
EP 91311898 A 19911220; JP 32762091 A 19911211