Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1989-09-01
1991-06-25
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
B41J 2165
Patent
active
050271342
ABSTRACT:
The invented non-clogging cap and service station include a cap that encloses and defines a cavity around a printhead. The cap includes a basin to collect liquid discharged from the printhead and a vent to prevent changes of pressure within the cavity. Capillary spaces are constructed within the cap from walls and ridges in such a way that liquid collecting in the basin moves away from the vent to prevent the vent from clogging. The basin, vent, walls and ridges are typically constructed from a wetting material to facilitate capillary action. An ink drain pan may also be included to receive liquid that overflows the basin. In this manner, the invention provides a vented cap to protect the printhead and uses capillary action to prevent the vent from clogging and causing the cap to malfunction. Furthermore, a wiper may be mounted near the cap to clean the printhead. The cap and wiper together form the invented service station.
REFERENCES:
patent: 4437105 (1984-03-01), Mrazek
patent: 4511906 (1985-04-01), Hara
patent: 4589000 (1986-05-01), Koto
patent: 4684963 (1987-08-01), Naka
patent: 4853717 (1989-08-01), Harmon
Harmon J. P.
Ward Jefferson P.
Hartary Joseph W.
Hewlett--Packard Company
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