Screen for a mosaic ink recorder

US4379304A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Joachim Heinzl · Munich, DE
• Erich Kattner · Munich, DE

Key dates

• Filing date: Jan 21, 1981
• Grant date: Apr 5, 1983
• Expiry date: Jan 21, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2002/14475
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A mosaic ink recorder having a number of outlet nozzles in a nozzle plate for discharging ink droplets on a recording media has a screen with apertures therein which are disposed in groups in registry with the outlet nozzles, the apertures in the screen having a diameter which is substantially less than the diameter of the outlet nozzles. The apertures increase the pressure necessary to break the meniscus of the ink remaining in a channel after discharge of a droplet by a ratio approximately equal to the ratio of the diameter of the aperture to the diameter of the nozzle. The recording head is thus rendered substantially less sensitive to vibration and other disturbances which may otherwise break the meniscus and permit ink to flow in a channel at undesired times. The screen may be a separately attachable element or may be integrated with the body of the recording head.