IP Library Granted Patent US 9,851,652
Granted Patent B2
US 9,851,652 · App. 15/346,159 · Granted Dec 26, 2017

Insert molded bearing for a rotatable component of an image forming device

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Quick Facts
Patent No.
US 9,851,652
App. No.
15/346,159
Granted
Dec 26, 2017
Kind
B2
Abstract

A bearing assembly for supporting a rotatable component of an electrophotographic image forming device according to one example embodiment includes a metal bearing insert molded into an electrically nonconductive plastic shell. The metal bearing includes a bearing surface that defines a cylindrical opening for receiving an axial end of a shaft. The plastic shell covers an entire outer circumferential surface of the metal bearing and an inner axial side of a portion of the metal bearing forming the opening is inset from an inner axial side of the plastic shell such that the plastic shell shields the metal bearing from electrical arcing.

Claims (15)

1. An assembly for an electrophotographic image forming device, comprising:

a photoconductive drum having an outer surface;

a charge roll having an outer surface in contact with the outer surface of the photoconductive drum, the charge roll has a shaft that includes a pair of axial ends; and

a charge roll bearing that includes an electrically conductive metal bearing insert molded into an electrically nonconductive plastic shell, the metal bearing includes a bearing surface that rotatably supports one of the pair of axial ends of the shaft, the plastic shell encapsulates all portions of the metal bearing that are positioned adjacent to the photoconductive drum such that the plastic shell shields the metal bearing from electrical arcing with the photoconductive drum.

2. The assembly of claim 1 , wherein the metal bearing includes a tab extending therefrom away from the photoconductive drum, the tab receives an electrically conductive compression spring that provides an electrical path to the metal bearing and that biases the charge roll bearing toward the photoconductive drum.

3. An assembly for an electrophotographic image forming device, comprising:

a photoconductive drum having an outer surface;

a charge roll having an outer surface in contact with the outer surface of the photoconductive drum, the charge roll has a shaft that includes a pair of axial ends; and

a charge roll bearing that includes an electrically conductive metal bearing insert molded into an electrically nonconductive plastic shell, the metal bearing includes a bearing surface that rotatably supports one of the pair of axial ends of the shaft, the plastic shell covers an entire outer circumferential surface of the metal bearing that is proximate to the photoconductive drum and an inner axial side of the metal bearing is inset from an inner axial side of the plastic shell such that the plastic shell shields the metal bearing from electrical arcing with the photoconductive drum.

4. The assembly of claim 3 , wherein an outer axial side of the metal bearing is inset from an outer axial side of the plastic shell.

5. The assembly of claim 3 , wherein the metal bearing includes a tab extending therefrom away from the photoconductive drum, the tab receives an electrically conductive compression spring that provides an electrical path to the metal bearing and that biases the charge roll bearing toward the photoconductive drum.

6. A bearing assembly for supporting a rotatable component of an electrophotographic image forming device, comprising:

a metal bearing insert molded into an electrically nonconductive plastic shell, the metal bearing includes a bearing surface that defines a cylindrical opening for receiving an axial end of a shaft, the plastic shell covers an entire outer circumferential surface of the metal bearing and an inner axial side of a portion of the metal bearing forming the opening is inset from an inner axial side of the plastic shell such that the plastic shell shields the metal bearing from electrical arcing.

7. The bearing assembly of claim 6 , wherein an outer axial side of the portion of the metal bearing forming the opening is inset from an outer axial side of the plastic shell.

8. The bearing assembly of claim 6 , wherein the metal bearing includes a tab extending therefrom, the tab receives an electrically conductive compression spring that provides an electrical path to the metal bearing and that applies a physical bias to the metal bearing.

Assignments (5)
SECURITY INTEREST Recorded Jan 5, 2026
From: LEXMARK INTERNATIONAL, INC.
To: BANK TRUST COMPANY, NATIONAL ASSOCIATION
Reel/Frame 074202/0192 →
SECURITY INTEREST Recorded Jan 5, 2026
From: LEXMARK INTERNATIONAL, INC.
To: BANK TRUST COMPANY, NATIONAL ASSOCIATION
Reel/Frame 074202/0293 →
SECURITY INTEREST Recorded Sep 23, 2025
From: LEXMARK INTERNATIONAL, INC.
To: CITIBANK, N.A.
Reel/Frame 073007/0118 →
SECURITY INTEREST Recorded Sep 23, 2025
From: LEXMARK INTERNATIONAL, INC.
To: JEFFERIES FINANCE LLC
Reel/Frame 073007/0346 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 14, 2016
From: GILLIAM, TREY DUSTIN; MALE, PHILIP JOHN; PHATAK, GANESH VIVAYAK
To: LEXMARK INTERNATIONAL, INC.
Reel/Frame 040734/0810 →