Ink jet record head

Details Ink jet record head Ink jet record head

2006-08-15

2006-08-15

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S063000

Reexamination Certificate

active

07090334

ABSTRACT:
An ink jet recording head having a nozzle shape capable of promptly curbing meniscus vibrations occurring on refilling and stably performing discharge is provided. In the ink jet recording head, a second discharge port portion has a form in which, with a lower side of a square on a bubbling chamber side, angles on an upper side of the square are curved respectively on any cross section perpendicular to a principal surface of an element substrate on which heaters are formed and going through the center of a discharge port, and these curves are shaped as arcs of circles of a radius R inscribed in the angles on the upper side of the square respectively.

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