IP Library Granted Patent US 11,126,112
Granted Patent B2
US 11,126,112 · App. 17/082,731 · Granted Sep 21, 2021

Toner agitator support

Inventors: Brian Scott Carpenter (Lexington, KY); Randal Scott Williamson (Georgetown, KY)
Assignee: Lexmark International, Inc.
G03G15/0889G03G15/087G03G15/0812G03G15/0881G03G2215/0663G03G2215/085
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Quick Facts
Patent No.
US 11,126,112
App. No.
17/082,731
Granted
Sep 21, 2021
Kind
B2
Abstract

A toner container according to one example embodiment includes a housing having a reservoir for storing toner. A rotatable developer roll is mounted on the housing. A doctor blade has a distal end in contact with the outer surface of the developer roll along a length of the developer roll for metering toner on the outer surface of the developer roll. The doctor blade has a proximate end positioned against a portion of the housing. A toner agitator in the reservoir has a shaft. A support in the reservoir is positioned in close proximity to the shaft to limit bending of the shaft. A first end of the support contacts an inner surface of the portion of the housing that the proximate end of the doctor blade is positioned against. The support stiffens the portion of the housing that the proximate end of the doctor blade is positioned against.

Claims (35)

1. A toner container for use in an electrophotographic image forming device, comprising:

a housing having a reservoir for storing toner;

a rotatable developer roll mounted on the housing for transferring toner from an outer surface of the developer roll to a corresponding photoconductive drum during operation of the toner container in the image forming device;

a doctor blade having a distal end in contact with the outer surface of the developer roll along a length of the developer roll for metering toner on the outer surface of the developer roll, the doctor blade has a proximate end positioned against a portion of the housing;

a toner agitator in the reservoir having a shaft; and

a support in the reservoir positioned in close proximity to the shaft to limit bending of the shaft, a first end of the support contacts an inner surface of the portion of the housing that the proximate end of the doctor blade is positioned against, the support stiffening the portion of the housing that the proximate end of the doctor blade is positioned against.

2. The toner container of claim 1 , further comprising a seal positioned between the proximate end of the doctor blade and the portion of the housing that the proximate end of the doctor blade is positioned against.

3. The toner container of claim 1 , wherein the toner agitator is rotatable about a rotational axis defined by the shaft.

4. The toner container of claim 1 , wherein the support is formed integrally with the portion of the housing that the proximate end of the doctor blade is positioned against.

5. The toner container of claim 1 , further comprising a rotatable toner adder roll mounted on the housing and positioned to supply toner in the reservoir to the developer roll, wherein the toner agitator is positioned adjacent to the toner adder roll.

6. The toner container of claim 1 , wherein the support at least partially encircles the shaft.

7. The toner container of claim 1 , wherein the support is positioned in close proximity to the shaft at a point that is closer to a midpoint along a length of the shaft than to a first end of the shaft and a second end of the shaft.

8. The toner container of claim 1 , wherein a longitudinal dimension of the support from the first end of the support to a second end of the support is transverse to a length of the shaft.

9. A toner container for use in an electrophotographic image forming device, comprising:

a housing having a reservoir for storing toner;

a rotatable developer roll mounted on the housing for transferring toner from an outer surface of the developer roll to a corresponding photoconductive drum during operation of the toner container in the image forming device;

a doctor blade having a distal end in contact with the outer surface of the developer roll along a length of the developer roll for metering toner on the outer surface of the developer roll, the doctor blade has a proximate end positioned against a portion of the housing;

a toner agitator in the reservoir having a shaft; and

a support in the reservoir positioned in close proximity to the shaft to limit bending of the shaft, a first end of the support contacts an inner surface of the portion of the housing that the proximate end of the doctor blade is positioned against, the support is formed integrally with the portion of the housing that the proximate end of the doctor blade is positioned against.

10. The toner container of claim 9 , further comprising a seal positioned between the proximate end of the doctor blade and the portion of the housing that the proximate end of the doctor blade is positioned against.

11. The toner container of claim 9 , wherein the toner agitator is rotatable about a rotational axis defined by the shaft.

12. The toner container of claim 9 , further comprising a rotatable toner adder roll mounted on the housing and positioned to supply toner in the reservoir to the developer roll, wherein the toner agitator is positioned adjacent to the toner adder roll.

13. The toner container of claim 9 , wherein the support at least partially encircles the shaft.

14. The toner container of claim 9 , wherein the support is positioned in close proximity to the shaft at a point that is closer to a midpoint along a length of the shaft than to a first end of the shaft and a second end of the shaft.

15. The toner container of claim 9 , wherein a longitudinal dimension of the support from the first end of the support to a second end of the support is transverse to a length of the shaft.

16. A toner container for use in an electrophotographic image forming device, comprising:

a housing having a reservoir for storing toner;

a rotatable developer roll mounted on the housing for transferring toner from an outer surface of the developer roll to a corresponding photoconductive drum during operation of the toner container in the image forming device;

a rotatable toner adder roll mounted on the housing and positioned to supply toner in the reservoir to the developer roll;

a rotatable toner agitator in the reservoir having a shaft, the toner agitator is positioned to mix toner near the toner adder roll; and

a support in the reservoir positioned in close proximity to the shaft to limit bending of the shaft, the support contacts an inner surface of the housing that defines a volume of the reservoir, the support is formed integrally with a portion of the housing,

wherein the support is positioned in close proximity to the shaft at a point that is closer to a midpoint along a length of the shaft than to a first end of the shaft and a second end of the shaft.

17. The toner container of claim 16 , wherein the toner agitator is positioned immediately above the toner adder roll.

18. The toner container of claim 16 , wherein the support at least partially encircles the shaft.

19. The toner container of claim 16 , wherein a longitudinal dimension of the support from a first end of the support to a second end of the support is transverse to a rotational axis of the shaft.

Assignments (6)
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 Oct 28, 2020
From: TONGES, JEFFREY LAWRENCE
To: LEXMARK INTERNATIONAL, INC.
Reel/Frame 054198/0364 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 28, 2020
From: CARPENTER, BRIAN SCOTT; WILLIAMSON, RANDAL SCOTT
To: LEXMARK INTERNATIONAL, INC.
Reel/Frame 054198/0385 →
Continuity (3)
Provisional Application 62954093 · Dec 27, 2019
Provisional Application 63020389 · May 5, 2020
Related Publication 20210200115A1 · Jul 1, 2021