Ink jet recording head structure, ink jet printer, powder...

Details Ink jet recording head structure, ink jet printer, powder... Ink jet recording head structure, ink jet printer, powder...

2006-08-29

2006-08-29

Hsieh, Shih-Wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07097286

ABSTRACT:
The ink delivery hole11of the support member10made of ceramics that supports the recording head2consists of the elongated hole12provided with the inclined bottom surface13that opens on the ink jet recording head side and deepens toward the center and the small-diameter hole14that communicates therewith, while surface roughness of at least the inclined bottom surface13of the ink delivery hole11is set in a range from 0.4 to 1.0 μm in terms of arithmetic mean roughness (Ra) and the void ratio is set in a range from 5 to 30%. This constitution prevents bubbles, if ever entered, from staying in the ink delivery hole of the support member that supports the ink jet recording head, and enables it to stably discharge ink droplets of a predetermined quantity.

REFERENCES:
patent: 6109738 (2000-08-01), Miyata et al.
patent: 6568797 (2003-05-01), Yamauchi et al.
patent: 2003/0112300 (2003-06-01), Chung et al.
patent: 2001-130004 (2001-05-01), None

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