Hewlett-packard Company

Hewlett-packard Development Company, L.p.

Carl D Geleynse

George Bernhard Clifton

John A Thompson

Michael B Lloyd

Transfer component monitoring methods, image forming devices, data signals, and articles of manufacture are described. According to one aspect, a transfer component monitoring method includes counting a plurality of imaging operations performed by an image forming device to form a plurality of hard images and adjusting a result of the counting to determine wear of a transfer component of the image forming device, wherein the transfer component is configured to assist with a transfer of a developing material to form the hard images.

Transfer component monitoring methods, image forming devices, data signals, and articles of manufacture

An imaging system carries an image defined by a dry powder or liquid toner. The imaging system includes a first transfer roll that electrostatically or adhesively accumulates the color image from a photoconductor, and a second transfer roll in transfixing contact with the first transfer roll. The second transfer roll possessing a central radiant heat source and a radiant heat source located adjacent to the first transfer roll in radiant proximity to an entering media sheet and the transfixing contact between the first and second transfer rolls. The first transfer roll includes at least a first basecoat layer and a topcoat layer. The basecoat layer includes a material that is electrically conductive and exhibits elastomeric and macrocompliant properties enabling the media to wrap through a significant arc under the transfixing contact and heat of the second transfer roll. The topcoat layer includes a specially formulated Fluorosilicone topcoat material that has a low surface energy and exhibits a microcompliance and resiliency enabling the first layer to compliantly mate with the photoconductor surface. The second transfer roll includes an outer, liquid carrier phobic layer and an inner compliant layer for enabling direct transfer of an image from the first transfer roll to a media sheet. The second transfer roll is optionally electrically biased with a polarity to prevent premature transfer of the image on the first transfer roll.

Dry powder or liquid toner image transfixing system

A liquid toner electrophotographic printer includes a movable photoconductor surface, a developer roller, a squeegee roller, a liquid toner cartridge having a supply of liquid toner and a rotatable foam roller, and a transport mechanism including a carriage and air cylinder driven actuation system. The squeegee roller is rotatably mounted on the printer for movement between a first position wherein the squeegee roller is in contact with the photoconductor surface, wherein a drip line of liquid toner forms therebetween, and a second position wherein the squeegee roller is spaced away from the photoconductor. The transport mechanism moves the cartridges between a first position wherein the cartridge foam roller is in contact with the squeegee roller and the developer roller to remove excess liquid toner therefrom and a second position wherein the foam roller is in contact with the photoconductor surface and the squeegee roller, downstream of the squeegee roller, to remove the drip line from the photoconductor surface and the squeegee roller when the squeegee roller is in the second position.

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Eagle, ID, United States of America

Carl D Geleynse