Printing apparatus and method for determining amount of...

Details Printing apparatus and method for determining amount of... Printing apparatus and method for determining amount of...

2007-05-15

2009-10-13

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S007000, C347S086000

Reexamination Certificate

active

07600847

ABSTRACT:
A printing apparatus and method for detecting the amount of a printing material in a detachable printing material container comprised of a piezoelectric element and a memory in which frequency information is stored. The printing apparatus further comprises an acquiring unit that acquires the frequency information from the memory; a supplying unit that supplies a driving signal to be used for driving the piezoelectric element based on the frequency information of a first driving signal having a first frequency and a second driving signal having a second frequency that is different from the first frequency; a detecting unit that detects a response signal in response to the vibration of the piezoelectric element; a measuring unit that measures vibration frequency contained in the response signal; and a determining unit that determines the amount of the printing material contained in the printing material container based on the measured vibration frequency.

REFERENCES:
patent: 6470744 (2002-10-01), Usui et al.
patent: 2006-088605 (2006-04-01), None

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