Hewlett-Packard Company

R Scott Johnson

Paul K Mui

Bruce G Johnson

Tim Mitchell Hoberock

Stephen L Testardi

Wayne A Albright

Eric L Bokman

A system for automatically cleaning toner build-up on a roller, such as the fuser pressure roller in an electrophotographic printing device, using the duplexing capability of the device. One embodiment is a method for cleaning a roller in an image forming device. The method includes the steps of: feeding a sheet of print media into the simplex paper path; printing a cleaning pattern on one side of the sheet; routing the sheet through the duplex paper path to invert the sheet; and routing the inverted sheet back through the simplex paper path. When the image forming device includes a fuser, such as with a laser printer, a toner image cleaning pattern is applied to the paper or other sheet media, the toner is fused to the paper, the paper is then routed through a duplexer and back through the fuser. When the cleaning page is fed into the image forming device the second time, it goes through the device with the printed side down. As it passes through the fuser, the toner that makes up the cleaning pattern becomes tacky. The tacky toner cleans the pressure roller as the roller comes in contact with the printed side of the page.

System for cleaning rollers in an image forming device

A multi-functional I/O card guide snap mounts to a mother board and houses a slidably removable I/O card for interfacing the I/O card with the mother board. The card guide includes a snap mountable daughter card for bridging the connection between the I/O card and the mother board. The card guide serves as a guide for accurately and easily slidably interfacing the I/O card with the daughter card, and serves as a connector for interfacing the I/O card and daughter card with the mother board. The card guide provides alignment accuracy between the I/O card and the interfacing daughter card connector because of a short tolerance path therebetween and inherent coplanar accuracy. Advantageously, no custom parts are required like conventional high rise connectors, and no extra mounting space or hardware is required like conventional backplane connector systems.

Multi-functional I/O card guide

There is provided an apparatus for conveying a media's size to a printing system. First there is a rotatable shaft. Several cams are formed around the shaft. Each cam has a lobe extending beyond the radius of the shaft. A number of levers, one for each cam, pivot about a pivot point and have a tab that is adjacent to a corresponding cam. An indicator wheel is also attached to the shaft. The indicator wheel has a first set of faces located around the circumference of the indicator wheel, where each face indicates a media size. The indicator wheel has another set of faces that indicate a second set of media sizes. Finally, there is a slidable lever positioned adjacent to the indicator wheel. When the slidable lever is in a first position, only media sizes in the first set are visible and the presently visible size is the size conveyed to the printing system. Similarly, when the slidable lever is in a second position, only media sizes in the second set are visible and the presently visible size is the size conveyed to the printing system.

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Nampa, ID, United States of America

R Scott Johnson