INK JET HEAD HAVING IMPROVED JET PORT SURFACE, AND INK JET APPARATUS EQUIPPED WITH THE INK JET HEAD

Title:

INK JET HEAD HAVING IMPROVED JET PORT SURFACE, AND INK JET APPARATUS EQUIPPED WITH THE INK JET HEAD

Document Type and Number:

WIPO Patent Application WO/1994/008793

Kind Code:

A1

Abstract:

This invention is directed to prevent an ink jet inactivation state which is induced when ink droplets adhering to the jet port surface of an ink jet head reach the jet port, and is characterized by including a water repellent region in the proximity of the jet port disposed on the jet port surface and a groove-like hydrophilic region inside a region spaced apart by a predetermined distance from the jet port and adjacent to the water repelling region. Since the groove-like hydrophilic region is disposed, the ink droplets adhering to the jet port surface can be taken into the hydrophilic region. Accordingly, excellent recording can be accomplished even under the condition of high speed recording and high frequency driving.

Inventors:

KIMURA MAKIKO (JP)
SUGITANI HIROSHI (JP)
SUGAMA SADAYUKI (JP)
ISHINAGA HIROYUKI (JP)

Application Number:

PCT/JP1993/001495

Publication Date:

April 28, 1994

Filing Date:

October 18, 1993

Export Citation:

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Assignee:

CANON KK (JP)
KIMURA MAKIKO (JP)
SUGITANI HIROSHI (JP)
SUGAMA SADAYUKI (JP)
ISHINAGA HIROYUKI (JP)

International Classes:

B41J2/14; B41J2/16; B41J2/165; (IPC1-7): B41J2/135

Foreign References:

JPH0288247A	1990-03-28
JPS62126937U	1987-08-12

Other References: