Ink jet head with internal filter

Details Ink jet head with internal filter Ink jet head with internal filter

1993-04-30

1996-02-06

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

291638, 210488, 347 93, B41J 219

Patent

active

054899303

ABSTRACT:
An internal ink filter (12) located within an ink jet print head (10) is formed by overlapping filter portions (100 and 102) of two laminated plates (22 and 24) that comprise the print head. Each plate includes an array of holes (120) in the filter portion. The individual holes have an opening dimension (122) such that the plates can be easily manufactured using conventional techniques, although the opening dimension may be too large for effective filtering. The plates are juxtaposed with the holes of each plate partly overlapping the holes of the other plate. The areas of overlap define a filter pore smaller than the individual holes in each plate.

REFERENCES:
patent: 4046359 (1977-09-01), Gellert
patent: 4639748 (1987-01-01), Drake et al.
patent: 4680595 (1987-07-01), Cruz-Uribe et al.
patent: 4864329 (1989-09-01), Kneezel et al.
patent: 4883219 (1989-11-01), Anderson et al.
patent: 5087930 (1992-02-01), Roy et al.
Excerpt from Apr. 16, 1992 confidential Tektronix internal report "Jolt Fru Investigation" by Don MacLane (4 pages).

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