Function liquid filling apparatus, liquid droplet ejection...

Details Function liquid filling apparatus, liquid droplet ejection... Function liquid filling apparatus, liquid droplet ejection...

2005-05-03

2005-05-03

Huson, Gregory L. (Department: 3751)

Fluent material handling, with receiver or receiver coacting mea

With testing or weighing receiver content

C141S192000

Reexamination Certificate

active

06886607

ABSTRACT:
A function liquid filling device includes: a feed unit for feeding a function liquid in a function liquid tank toward head caps coupled to function liquid droplet ejection heads through the function liquid droplet ejection heads; a detection unit for detecting that the fed function liquid reaches the head caps; and a control unit for stopping the drive of the feed unit based on a result of detection by the detection unit. The detection unit includes: a crystal oscillator disposed in the head cap and/or a waste liquid passage; and a detector for detecting the presence or absence of the function liquid based on a change in a resonance frequency of the crystal oscillator.

REFERENCES:
patent: 5996650 (1999-12-01), Phallen et al.
patent: 6167747 (2001-01-01), Koch et al.
patent: 6-99592 (1994-04-01), None
Patent Abstracts of Japan regarding Publication No. 05-099592, published Apr. 12, 1994.

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