Printing apparatus and control method that includes an optical detector for detecting the presence or absence of an ink tank and ink therein
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 3, 2002
Grant Date -
Jun 13, 2002
app pub date -
Nov 12, 1998
filing date -
Nov 14, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A low-cost printing apparatus and printing control method through which the absence or presence of an ink tank and ink can be determined accurately regardless of the surrounding environment. The printing apparatus obtains the difference between a first signal, which is obtained from light received by a light-receiving element (16) in a case where a light reflecting surface (41) and an optical prism (42) are irradiated with light, and a second signal, which is obtained from light received by the light-receiving element (16) in a case where the light reflecting surface (41) and optical prism (42) are not irradiated with light, compares the difference with a predetermined threshold value and determines whether or not ink is present and/or whether or not the ink tank is present, based upon the result of the comparison.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully