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Inkjet printed conductive coating for Transfer Assist Blade applications

IP.com Disclosure Number: IPCOM000236334D
Publication Date: 2014-Apr-21
Document File: 3 page(s) / 4M

Publishing Venue

The IP.com Prior Art Database

Abstract

Transfer assist blades (TAB) are used in xerographic printers to facilitate image transfer of toner to the print media substrate (e.g. paper). It is important to control the electrical properties of this component (TAB). This idea proposes the use of an inkjet printed conductive carbon pattern to control the resistivity of the back side of the transfer assist blade. A blade with a controlled conductivity back surface (surface facing the coronode) eliminates print quality defects and provides beneficial transfer field tailoring in the transfer zone. The proposal is to screen print a conductive carbon ink pattern on the back layer of a TAB to provide for a known resistivity. Controlling surface resistance of the TAB back layer (the surface facing the coronode) to between 10^8 to 10^9 ohms eliminates print quality defects and provides beneficial transfer field tailoring in the transfer zone. An alternate technology to accomplish the same idea uses a back layer consisting of a thin film with a tightly controlled surface resistance.

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Inkjet printed conductive coating for Transfer Assist Blade applications

Transfer assist blades (TAB) are used in xerographic printers to facilitate image transfer of toner to the print media substrate (e.g. paper).  It is important to control the electrical properties of this component (TAB). This idea proposes the use of an inkjet printed conductive carbon pattern to control the resistivity of the back side of the transfer assist blade. A blade with a controlled conductivity back surface (surface facing the coronode) eliminates print quality defects and provides beneficial transfer field tailoring in the transfer zone.  The proposal is to screen print a conductive carbon ink pattern on the back layer of a TAB to provide for a known resistivity. Controlling surface resistance of the TAB back layer (the surface facing the coronode) to between 10^8 to 10^9 ohms eliminates print quality defects and provides beneficial transfer field tailoring in the transfer zone.  An alternate technology to accomplish the same idea uses a back layer consisting of a thin film with a tightly controlled surface resistance.

In a xerographic printer, a transfer assist blade (TAB) is used in conjunction with a corona device to perform the Transfer step (moving toner from photoreceptor to media). The TAB has two functions: 1) to provide mechanical pressure (~20%) and electrostatic pressure/tailoring (~80%). The electrostatic pressure/tailoring is conventionally achieved by using a semi-conductive layer on the side exposed to corona (bottom layer). This layer must meet a tight 1 decade 10^8 Ohm resistance specification.  T...