Title:
RECORDING DEVICE AND FACSIMILE EQUIPMENT USING THE SAME
Document Type and Number:
Japanese Patent JP3483390
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To detect an exact ink residue amount regardless of the installation environment of a device which is susceptible of a change by determining the presence of an ink residue through the comparison between the quantity of light received by a light receiving element and a specified threshold value, transferring a recording head tentatively to an ink discharge position and detecting again the ink residue amount.
SOLUTION: After the completion of an operation to store a single page, a recording head 5 is transferred to a position near an ink residue amount sensor 110, then an operation to discharge an ink is performed in such a way that the ink traverses a light beam emitted by a light emitting element, and thus the ink residue amount is measured by detection. In addition, the position of the recording head 5 is shifted from its routine position by ±ΔL and again the ink is tentatively discharged so that a position where an ink liquid droplet drops coincides with the photoaxial position of the sensor 110. The ink residue amount detected at a position deviated from the routine position is compared to the ink residue amount detected at the routine position. In this case, if the variation of a photoelectric current through a light receiving element obtained by detecting the ink residue amount at the position deviated from the routine position is more significant than that obtained by detecting the ink residue amount at the routine position, the deviated position is used as a routine position for the following detection of the ink residue amount.
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Inventors:
Takashi Imai
Application Number:
JP4918696A
Publication Date:
January 06, 2004
Filing Date:
March 06, 1996
Export Citation:
Assignee:
Canon Inc
International Classes:
B41J2/175; H04N1/00; H04N1/23; (IPC1-7): B41J2/175; H04N1/00; H04N1/23
Domestic Patent References:
| JP6339344A | ||||
| JP62156965A | ||||
| JP5996969A | ||||
| JP9240008A | ||||
| JP994946A | ||||
| JP8309963A | ||||
| JP7232440A | ||||
| JP7154554A | ||||
| JP5318765A | ||||
| JP5309844A | ||||
| JP5309832A | ||||
| JP5119159A | ||||
| JP550611A | ||||
| JP47159A | ||||
| JP3244548A | ||||
| JP2194967A |
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)