Printing liquid developer

Patent metadata

Field	Value
Publication number	US-10429768-B2
Application number	US-201615748603-A
Country	US
Kind code	B2
Filing date	Jan 28, 2016
Priority date	Jan 28, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

In some examples, a printing liquid developer includes a developer roller that has a hollow tubular base body formed of a material including conductive carbon fiber, a conductive, compliant layer around an outer surface of the hollow tubular base body, and an electrically conductive support separate from the hollow tubular base body and electrically contacted to a surface of the hollow tubular base body.

First claim

What is claimed is:

1. A printing liquid developer for a printing system, comprising:
a developer roller comprising:
a hollow tubular base body formed of a material comprising conductive carbon fiber;
a conductive, compliant layer around an outer surface of the hollow tubular base body; and
an electrically conductive support separate from the hollow tubular base body and electrically contacted to a surface of the hollow tubular base body.

2. The printing liquid developer of claim 1 , wherein the electrically conductive support is electrically contacted to an inner surface of the hollow tubular base body, the inner surface defining an inner bore of the hollow tubular base body.

3. The printing liquid developer of claim 2 , wherein the inner surface is treated to expose the carbon fiber, the electrically conductive support electrically contacted to the exposed carbon fiber.

4. The printing liquid developer of claim 1 , further comprising a printing liquid source to provide the printing liquid to the developer roller.

5. The printing liquid developer of claim 1 , wherein the outer surface of the hollow tubular base body is treated to expose the carbon fiber, the exposed carbon fiber to maintain electrical continuity between the hollow tubular base body and the conductive, compliant layer.

6. The printing liquid developer of claim 1 , wherein the conductive, compliant layer comprises a polymer.

7. The printing liquid developer of claim 1 , wherein the conductive, compliant layer comprises polyurethane.

8. The printing liquid developer of claim 1 , wherein the electrically conductive support is for attachment to a drive mechanism to rotate the developer roller, and the electrically conductive support to receive an electrical current to maintain the developer roller at a specified electrical potential.

9. A printing system comprising:
a photoconductive member; and
a printing liquid developer to transfer a printing liquid to the photoconductive member, the printing liquid developer comprising:
a tubular base body formed of a material comprising conductive carbon fiber, the tubular base body comprising an inner bore;
a conductive, compliant layer around an outer surface of the tubular base body; and
an electrically conductive support separate from the tubular base body and electrically contacted to an inner surface of the tubular base body, the inner surface defining the inner bore.

10. The printing system of claim 9 , wherein the electrically conductive support is press fit into the inner bore of the tubular base body.

11. The printing system of claim 10 , wherein the inner surface of the tubular base body is treated to expose the carbon fiber, the exposed carbon fiber electrically contacted to a connecting member of the support.

12. The printing system of claim 9 , wherein the printing liquid developer is a binary ink developer (BID).

13. The printing system of claim 9 , wherein the photoconductive member is selectively chargeable based on a target image to be formed by the printing system on a media sheet.

14. A method of forming a printing liquid developer, comprising:
arranging a conductive, compliant layer around an outer surface of a hollow tubular base body formed of a material comprising carbon fiber; and
attaching a portion of an electrically conductive support to the hollow tubular base body to make electrical contact between the portion of the electrically conductive support and an inner surface of the hollow tubular base body, the inner surface of the hollow tubular base body defining an inner bore of the hollow tubular base body, and the electrically conductive support being separate from the hollow tubular base body.

15. The method of claim 14 , further comprising:
treating a portion of the inner surface of the hollow tubular base body to expose the carbon fiber, the treated portion of the inner surface of the hollow tubular base body electrically contacted to the portion of the electrically conductive support, wherein the treating comprises grinding or sanding the portion of the inner surface.

Assignees

• Hp Indigo Bv

Inventors

• Sabo David
• Kozmiski Stanley J
• Li guang jin
• Godden John W

Classifications

• G03G2215/025

  using contact charging means having lateral dimensions related to other apparatus means, e.g. photodrum, developing roller · CPC title

• G03G15/0818

  characterised by the structure of the donor member, e.g. surface properties · CPC title

• G03G15/0168

  single rotation of recording member to produce multicoloured copy (G03G15/0163 takes precedence) · CPC title

• G03G15/0233

  Structure, details of the charging member, e.g. chemical composition, surface properties · CPC title

• G03G2215/0855

  Materials and manufacturing of the developing device · CPC title