Hewlett-packard Indigo B.v.

Ami Shiff

Doron Schlumm

Craig Breen

Sharon Nagler

Martin Chauvin

Haggai Abbo

Shai Druckman

Yuri Baril

Avner Arnstein

Omry Flum

Apparatus for draining liquid droplets from a surface is described. The apparatus comprises an array of oleophilic channels substantially interspersed with oleophobic material, wherein a width of an oleophilic channel is arranged to move liquid associated with said droplets along the oleophilic channel by capillary action and wherein a distance between two successive oleophilic channels is less than a critical droplet diameter, the critical droplet diameter corresponding to a droplet that will separate from the surface. The oleophilic channels act to preferentially attract condensed oil and the oleophobic material acts to repel condensed oil such that formation of droplets is restricted by the oleophilic channel. By selecting an appropriate channel width, the size of droplets is prevented from exceeding a critical size, at which the droplets can no longer be held by surface tension to the condensing surface and drip away from the condensing surface.

Oil vapor condensate drainage using oleophilic channels

Detecting an issue in a digital printer that has an optical element positioned to direct a laser beam towards a photoconductor surface may include sending optical element position commands to move the optical element to compensate for inconsistent movements of a photoconductor drum and creating a record of the optical element position commands.

Issue detection in a digital printer

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Tel Aviv, Israel

Ami Shiff