Active biased electrodes for reducing electrostatic fields underneath print heads in an electrostatic media transport

Patent metadata

Field	Value
Publication number	US-8947482-B2
Application number	US-201313837263-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

Embodiments described herein are directed to a system for reducing electrostatic fields underneath print heads in a direct marking printing system. The system includes: one or more print heads for depositing ink onto a media substrate; a media transport for moving the media substrate along a media path past the one or more print heads; a conductive platen contacting the media transport belt; an electrostatic field reducer that includes an alternating current charge device positioned upstream of the one or more print heads; and one or electrically isolated biased electrodes in registration with the ink deposition areas of the one or more print heads. The media transport includes a media transport belt and, when the media is on the transport belt it has an electrostatic field, which can cause printing defects. The electrostatic field reducer and electrodes reduce the electrostatic field on the surface of the media and thereby reduce printing defects.

First claim

We claim:

1. A system for reducing electrostatic fields underneath print heads, the system comprising:
one or more print heads for depositing ink onto a surface of a media substrate in one or more ink deposition areas;
a media transport for moving the media substrate along a media path in a process direction past the one or more print heads, wherein the media transport comprises a media transport belt having a first side and a second side, and wherein the media substrate has an…

Assignees

• Xerox Corp

Inventors

• Ramesh Palghat S
• De Jong Joannes N M
• Fletcher Gerald M

Classifications

• B41J11/007

  Operations & Transport · mapped topic

• B41J11/06 Primary

  Operations & Transport · mapped topic