Acoustic ink printhead with apertured member and flowing ink

(19)

(11)

EP 0 550 148 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	18.11.1993 Bulletin 1993/46

(43)	Date of publication A2:
	07.07.1993 Bulletin 1993/27

(21)	Application number: 92310809.6

(22)	Date of filing: 26.11.1992

(51)	International Patent Classification (IPC)⁵: B41J 2/04

(84)	Designated Contracting States:
	DE FR GB

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Priority:

30.12.1991 US 815729

(71)	Applicant: XEROX CORPORATION
	Rochester New York 14644 (US)

(72)	Inventors:
	Quate, Calvin F. Stanford, California 94305 (US) Khuri-Yakub, Butrus T. Palo Alto, California 94306 (US) Hadimioglu, Babur B. Mountain View, California 94040 (US)

(74)	Representative: Reynolds, Julian David et al
	Rank Xerox Ltd Patent Department Parkway Marlow Buckinghamshire SL7 1YL Marlow Buckinghamshire SL7 1YL (GB)

(56)

References cited: :

(54)	Acoustic ink printhead with apertured member and flowing ink

(57) An acoustic ink printhead (10) employing a flowing stream of ink past the ejectors to maintain a fresh ink supply at the ejector sites. An aperatured plate-like member (20) aligned with the ejector sites suppresses sideways droplet ejection components. A secondary pressure field using acoustic pulses or a pulsed heater provides dynamic liquid level control in addition to controlled switching of the ink droplets.

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