Ink-jet printhead allowing selectable droplet size

Details Ink-jet printhead allowing selectable droplet size Ink-jet printhead allowing selectable droplet size

1997-02-03

1999-08-03

Hartary, Joseph

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347206, B41J 205

Patent

active

059331666

ABSTRACT:
A thermal ink-jet printhead includes ejectors wherein a heating surface is disposed within a channel retaining liquid ink. The heating element within each ejector includes a converter for converting applied electrical energy to heat energy, and a distributor, for distributing the heat energy over a portion of the heating surface. The structure of the heating element allows the effective area of nucleation within the heating area, the size of which directly affects the volume of the ejected liquid ink droplet, to be varied with voltage and/or pulse width.

REFERENCES:
patent: 4251824 (1981-02-01), Hara et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 4870433 (1989-09-01), Campbell
patent: 4935752 (1990-06-01), Hawkins
patent: 4947189 (1990-08-01), Braun
patent: 5204689 (1993-04-01), Shirato
patent: 5481287 (1996-01-01), Tachihara
Xerox Disclosure Journal, vol. 16, No. 2, p. 91.

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