Optical ink level detecting arrangements for ink cartridges

Details Optical ink level detecting arrangements for ink cartridges Optical ink level detecting arrangements for ink cartridges

2006-11-21

2006-11-21

Feggins, K. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07137688

ABSTRACT:
An ink container shell for an ink jet cartridge has an ink chamber provided with an optical ink detection device in the form of a single or multi-segment prism having interface surfaces for reflecting light in a scan plane from a first to a second exterior area relative to the container shell when an ink level in the chamber recedes to a given level. The multi-segment prism provides for scanning a cartridge in different scanning planes. Either a single prism or the multi-segment prism can be separate from the cartridge and interengaged therewith by a snap-fit.

REFERENCES:
patent: 4783137 (1988-11-01), Kosman et al.
patent: 5616929 (1997-04-01), Hara
patent: 6361136 (2002-03-01), Watanabe et al.
patent: 6726313 (2004-04-01), Oda et al.
patent: 6767075 (2004-07-01), Takada et al.
patent: 6869158 (2005-03-01), Kojima et al.
patent: 6966642 (2005-11-01), Hanaoka et al.

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