Ink jet print head and ink jet printing apparatus provided with said ink jet print head

(19)

(11)

EP 0 960 733 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.01.2000 Bulletin 2000/01

(43)	Date of publication A2:
	01.12.1999 Bulletin 1999/48

(21)	Application number: 99117364.2

(22)	Date of filing: 18.10.1993

(51)	International Patent Classification (IPC)⁷: B41J 2/135, B41J 2/16

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30)

Priority:

19.10.1992 JP 28027592
19.10.1992 JP 28027692

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	93922649.4 / 0631869

(71)	Applicant: CANON KABUSHIKI KAISHA
	Ohta-ku, Tokyo (JP)

(72)	Inventors:
	Kimura, Makiko, c/o Canon K. K. Tokyo (JP) Sugitani, Hiroshi, c/o Canon K. K. Tokyo (JP) Sugama, Sadayuki, c/o Canon K. K. Tokyo (JP) Ishinaga, Hiroyuki, c/o Canon K. K. Tokyo (JP)

(74)	Representative: Tiedtke, Harro, Dipl.-Ing. et al
	Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4 80336 München 80336 München (DE)

(54)	Ink jet print head and ink jet printing apparatus provided with said ink jet print head

(57) An ink jet head, including

(i) a plurality of discharging outlets (D; 4) disposed in an arrangement direction;
(ii) a plurality of ink pathways (31), each of said ink pathways (31) communicating with an associated one of said discharging outlets (D; 4), each of said ink pathways (31) having an energy generating element for generating energy for discharging an ink from said discharging outlet (D; 4); and
(iii) a discharging outlet face (1A; 8) havinga discharging outlet surface, said discharging outlets (D; 4) being arranged in said discharging outlet surface anda water-repellent discharging outlet peripheral region (E; 7) circumscribing said discharging outlets (D; 4), and having a first side and a second side, herewitha recessed hydrophilic region (9) circumscribing said water-repellent discharging outlet peripheral region (E; 7), said recessed hydrophilic region (9) being positioned along the arrangement direction of the discharging outlets (D; 4) on at least one said side of said water-repellent discharging outlet peripheral region (E; 7), said recessed hydrophilic region (9) being separated by a predetermined distance from said water-repellent discharging outlet peripheral region (E; 7).