Method and apparatus for manufacturing a liquid ejection head

Metal deforming – With cutting – By shearing tool-couple

Reexamination Certificate

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Details

C029S890100, C347S068000

Reexamination Certificate

active

07100415

ABSTRACT:
A metallic plate member having at least one through hole to be a part a common liquid reservoir of a liquid ejection head is provided. In a first die, a plurality of first projections are arrayed in a first direction with a fixed pitch. Each of the first projections is elongated in a second direction perpendicular to the first direction. The plate member is mounted on a second die, and a regulating member is inserted into the through hole. The first projections are pressed against a first region in a first face of the plate member which is adjacent to the through hole in the second direction, so as to generate a plastic flow of a material in the plate member into gaps defined between the first projections, while the plastic flow is regulated by the regulating member. A plurality of recesses formed by the first projections and a plurality of partition walls formed by the material flown into the gaps constitutes a part of the pressure generating chambers.

REFERENCES:
patent: 3338084 (1967-08-01), Stegman, Sr.
patent: 4425777 (1984-01-01), Jeglinski
patent: 4574445 (1986-03-01), Bentin et al.
patent: 5144709 (1992-09-01), Rooney
patent: 5485664 (1996-01-01), Huang
patent: 6260272 (2001-07-01), Inose et al.
patent: 6328434 (2001-12-01), Soneda et al.
patent: 2000-108349 (2000-04-01), None
patent: 2000-263799 (2000-09-01), None

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