Ink jet head, method for producing ink jet head, and...

Details Ink jet head, method for producing ink jet head, and... Ink jet head, method for producing ink jet head, and...

2005-03-23

2008-08-26

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S071000, C347S040000, C347S047000

Reexamination Certificate

active

07416270

ABSTRACT:
An ink jet head includes a channel unit including a manifold plate and a nozzle plate. The manifold plate has annular grooves. The nozzle plate has annular grooves and nozzles. Each manifold plate annular groove and each nozzle plate annular groove form an annular cavity around one of the nozzles in the channel unit, so that a less rigid region is formed near the nozzle. In a detecting step, the directional deviation of the ink discharged from a nozzle is detected. The detecting step is followed by a deforming step for deforming the nozzle plate by radiating a laser beam to a radiation region in the less rigid region near a defective nozzle. The radiation region varies with the direction and amount in which the ink discharged from the defective nozzle deviates. A nozzle is regarded as defective if the ink discharged from it deviates directionally beyond a specified amount.

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patent: A 2003-326712 (2003-11-01), None

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