Title:
RESIDUAL QUANTITY OF INK DETECTOR AND INK CARTRIDGE
Document Type and Number:
Japanese Patent JP3833544
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a detector for detecting the residual quantity of ink in each of a plurality of ink cartridges being set removably on a print head in which further cost reduction and space saving are achieved.
SOLUTION: A pair of ink detection electrodes are provided on the wall face of each ink tank, adjacent detection electrodes touch to be interconnected electrically when each ink cartridge 1c, 1m, 1y is set in a print head, and impedance elements Cc, Cm and Cy having different impedances are provided in parallel with the impedances Zc, Zm and Zy of respective inks. A decision section 15 can detects an ended ink from the level or the phase difference of an output produced by modulating an input AC signal with a synthesized impedance. Since the residual quantity of ink in a plurality of ink cartridges can be detected individually while minimizing the routing of wiring, further cost reduction and space saving can be achieved.
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Inventors:
Matsuda
Kazuya Masuda
Takuji Hon
Kazuya Masuda
Takuji Hon
Application Number:
JP2002028434A
Publication Date:
October 11, 2006
Filing Date:
February 05, 2002
Export Citation:
Assignee:
Sharp Corporation
International Classes:
B41J2/175; (IPC1-7): B41J2/175
Domestic Patent References:
| JP11502791A | ||||
| JP8127136A | ||||
| JP63033947U | ||||
| JP10226091A | ||||
| JP10166617A | ||||
| JP10193640A | ||||
| JP10000791A | ||||
| JP5330079A | ||||
| JP9174878A |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office
Kenzo Hara
Kenzo Hara
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