Liquid detecting method and liquid detecting system

Details Liquid detecting method and liquid detecting system Liquid detecting method and liquid detecting system

2008-01-29

2008-01-29

Huffman, Julian D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S007000, C073S29000R

Reexamination Certificate

active

07322667

ABSTRACT:
A liquid detecting method of detecting liquid in a liquid container used on a liquid ejector by use of a liquid sensor. There are included a head cleaning step of performing a head cleaning operation after maintaining for a predetermined time or longer a state there is no flow of fluid into/from the cavity through the liquid supply port and liquid discharge port, and a detecting step of detecting a presence/absence of liquid by applying a drive signal to the piezoelectric device of the liquid sensor after the head cleaning process.

REFERENCES:
patent: 2001/0052627 (2001-12-01), Takahashi et al.
patent: 2003/0103119 (2003-06-01), Sakai et al.
patent: 2001-146024 (2001-05-01), None

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