A device for continuously supplying ink under constant pressure

(19)

(11)

EP 1 561 580 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.03.2006 Bulletin 2006/10

(43)	Date of publication A2:
	10.08.2005 Bulletin 2005/32

(21)	Application number: 04020395.2

(22)	Date of filing: 27.08.2004

(51)

International Patent Classification (IPC):

B41J 2/175^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL HR LT LV MK

(30)

Priority:

06.02.2004 CN 04215291
14.06.2004 CN 04267639

(71)	Applicant: Print-Rite Unicorn Image Products Co. Ltd of Zhuhai
	Zhuhai, Guangdong 519060 (CN)

(72)	Inventors:
	Qingguo, Xiao Zhuhai Guangdong 519060 (CN) Benyou, Jin Zhuhai Guangdong 519060 (CN)

(74)	Representative: Neugebauer, Jürgen et al
	Schroeter Lehmann Fischer & Neugebauer Wolfratshauser Strasse 145 81479 München 81479 München (DE)

(54)	A device for continuously supplying ink under constant pressure

(57) A device for continuously supplying ink under constant pressure comprising an ink storage tank (3) and an ink feeding pipe connecting an ink chamber with a print head. The ink storage tank includes a container having a relatively large ink chamber which has a gas passage connected with the atmosphere. Inside the ink storage tank is a first chamber (33) and a second chamber (35). A gas inlet port (31) connected with the atmosphere is provided inside the first chamber. At the lower part of the partition between the two chambers, there is provided a gas-liquid exchange entryway (37) that allows gas in the first chamber to enter into the second chamber and allows ink in the second chamber to flow into the first chamber. Utilizing an equilibrium principle of gas pressure, constant pressure processes can be designed and manufactured.

Search report