Ink-jet head and ink-jet printing apparatus incorporating the sa

Details Ink-jet head and ink-jet printing apparatus incorporating the sa Ink-jet head and ink-jet printing apparatus incorporating the sa

1996-01-26

2000-03-21

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 65, 347 92, B41J 205

Patent

active

060394374

ABSTRACT:
An ink-jet head reduces bubbles retained in a liquid chamber and restricts growth of the bubbles, for facilitating recovery operation. Also, the ink-jet head makes a substrate, on which the electrothermal transducers are arranged, compact. The ink-jet head is formed by fitting the substrate to an upper plate formed with ink ejection openings, nozzle portions communicated with the ink ejection openings and the common liquid chamber, and an ink supply cylinder. The inner surface of the common liquid chamber extending from an ink ejection opening side to an opening portion and the inner surface extending from the side opposite to the ink ejection opening side to the opening portion are tilted in the same direction, to dispense with a horizontally extending portion on the upper portion of the liquid chamber. A recessed portion is formed at the outside of the peripheral wall corresponding to the inner surface.

REFERENCES:
patent: 4313124 (1982-01-01), Hara
patent: 4345262 (1982-08-01), Shirato et al.
patent: 4459600 (1984-07-01), Sato et al.
patent: 4463359 (1984-07-01), Ayata et al.
patent: 4558333 (1985-12-01), Sugitani et al.
patent: 4608577 (1986-08-01), Hori
patent: 4723129 (1988-02-01), Endo et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 5576750 (1996-11-01), Brandon et al.

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