Lexmark International, Inc.

David Daniel Dreyfuss

Gary Allen Denton

Erik Christopher Bard

William Paul Cook

Peter E Wallin

Alexander D Meade

Todd Lucas Janes

Pramod K Sharma

Jeanne Marie Saldanha-Singh

Various methods and apparatus are disclosed for facilitating the loading, transportation, and modulation of toner particles on a print head, as well as the transfer of toner particles onto a print medium. These methods and apparatus relate to the optimization of various elements on the print head to improve the speed and control of toner particles on the print head, as well as to the alteration of the electric field in the vicinity of the end of the print head.

Printing apparatus with focusing of toner particles

Toner transport device having electrically altered launch runway and

Various methods and apparatus are disclosed for facilitating the loading, transportation, and modulation of toner particles on a print head, as well as the transfer of toner particles onto a print medium. These methods and apparatus relate to the optimization of various elements on the print head to improve the speed and control of toner particles on the print head, as well as to the alteration of the electric field in the vicinity of the end of the print head, and to the use of a scanning print head.

Scanning print head

Optimization of transport parameters for traveling wave toner transport

Various methods and apparatus are disclosed for facilitating the loading, transportation, and modulation of toner particles on a print head, as well as the transfer of toner particles onto a print medium. These methods and apparatus relate to the optimization of various elements on the print head to improve the speed and control of toner particles on the print head, as well as to the alteration of the electric field in the vicinity of the end of the print head, and the transfer of toner particles vertically from the print head.

Traveling wave and vertical toner transfer

Standard, unfixed electrophotographic images are transferred from a photoconductor drum (5) to paper (7) at a nip location with a transfer roller (3). The paper remains in contact with the transfer roller until it is positioned under a ink jet printhead (9), where a second image, typically color highlights, is printed. This configuration requires no additional registration of the two images. The ink jet printhead may be charged to repel stray toner which might clog its nozzles. The transfer member may be a belt or may be large enough to permit movement of the paper at the higher speeds of electrophotographic at the transfer station and at the lower speeds of ink jet printing when the paper is at the ink jet printing station.

Combined electrophotographic and ink jet printing

A printer or other imaging apparatus (1) in which two or more images in registration are transferred from a photoconductor (3) to an intermediate transfer drum (5). The transfer drum has very stable resistivity, which is achieved by the body of the drum being cesium iodide filled polyurethane.

High stability color imaging by transfer roller

An electrophotographic printer employs a intermediate transfer roller of a copolymer of urethane and silicone carbinol. Transfer efficiency is excellent over a period normally coinciding with the full life of a printer or other imaging device.

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Nicholasville, KY, United States of America

David Daniel Dreyfuss