Printing head for ink jet printer

Details Printing head for ink jet printer Printing head for ink jet printer

1989-01-27

1989-12-26

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1518, B41J 304

Patent

active

048901261

ABSTRACT:
A printing head for use in an ink jet printer having a head body formed of a photosensitive polyimido resin, a plurality of grooves defined in the head body and an upper plate to be disposed on the head body for covering the grooves for forming a plurality of ink passages. An ink opening area of the ink passage is coated with an ink-phobic organic plasma polymer film while a remaining area of the passage is coated with an ink-philic organic plasma polymer film. When a water-based ink is employed, the ink-philic organic plasma polymer film may contain oxygen atoms and/or nitrogen atoms while the ink-phobic organic plasma polymer film may contain halogen atoms. When an oil-based ink is employed, the ink-philic organic plasma polymer film may contain halogen atoms while the ink-phobic organic plasma polymer film may contain oxygen atoms and/or nitrogen atoms.

REFERENCES:
patent: 4296421 (1981-10-01), Hara et al.
patent: 4368476 (1983-01-01), Oehara
patent: 4376945 (1983-03-01), Hara et al.
patent: 4417251 (1983-11-01), Sugitani
patent: 4504844 (1985-03-01), Ebi
patent: 4707705 (1987-11-01), Hara et al.
patent: 4725862 (1988-02-01), Matsuzaki
patent: 4751532 (1988-06-01), Fujimura
patent: 4801955 (1989-01-01), Miura
Kotla et al.; Bimetallic Differential-Wetting Piezoelectric Printing Device; IBM TDB V15, N5, Oct. 1972, pp. 1418-19.

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