Angled toner paddles for a replaceable unit of an image forming device

Patent metadata

Field	Value
Publication number	US-9360796-B2
Application number	US-201414306416-A
Country	US
Kind code	B2
Filing date	Jun 17, 2014
Priority date	Jun 5, 2014
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A replaceable unit for an electrophotographic image forming device according to one embodiment includes a housing having a reservoir for storing toner and an outlet for exiting toner from the housing. A channel in fluid communication with the outlet has an inlet positioned between the first end and the second end of the reservoir. A rotatable auger is positioned along the channel. Paddles extend from a rotatable shaft in the reservoir. A first set of one or more paddles are positioned between a first end of the reservoir and the inlet of the channel and a second set of one or more paddles are positioned between a second end of the reservoir and the inlet of the channel. The first and second sets of paddles are angled to direct toner away from the first end and the second end of the reservoir, respectively, and toward the inlet of the channel.

First claim

The invention claimed is:

1. A replaceable unit for an electrophotographic image forming device, comprising:
a housing having a reservoir for storing toner and an outlet for exiting toner from the housing, the reservoir has a first end and an opposed second end along a length of the housing;
a channel in the housing along at least a portion of the length of the housing, the channel has an inlet positioned between the first end and the second end of the reservoir, the inlet is in fluid communication with the reservoir for receiving toner from the reservoir and the channel is in fluid communication with the outlet for exiting toner from the channel;
a rotatable auger positioned along the channel for moving toner in the channel toward the outlet;
a rotatable shaft having a first end at the first end of the reservoir and a second end at the second end of the reservoir; and
a plurality of paddles extending from the shaft and rotatable with the shaft, the plurality of paddles includes a first set of one or more paddles positioned between the first end of the reservoir and the inlet of the channel and a second set of one or more paddles positioned between the second end of the reservoir and the inlet of the channel, the first set of one or more paddles are angled to direct toner away from the first end of the reservoir and toward the inlet of the channel and the second set of one or more paddles are angled to direct toner away from the second end of the reservoir and toward the inlet of the channel,
wherein each of the plurality of paddles includes a rigid and substantially straight segment that extends along a length of the shaft and a flexible member on a distal end of the substantially straight segment that extends radially outward past the distal end of the substantially straight segment, a first axial end of the substantially straight segment is angularly offset from a second axial end of the substantially straight segment relative to a longitudinal axis of the shaft such that the substantially straight segment is angled relative to the longitudinal axis of the shaft,
wherein each of the plurality of paddles includes a plurality of ribs extending outward from the distal end of the substantially straight segment, the ribs are angled away from the flexible member trailing the flexible member in an operative rotational direction of the shaft and positioned to limit by contacting the flexible member how far the flexible member flexes counter to the operative rotational direction of the shaft.

2. The replaceable unit of claim 1 , wherein adjacent axial ends of the one or more paddles of at least one of the first set and the second set overlap axially with each other.

3. The replaceable unit of claim 1 , wherein each of the one or more paddles of the first set forms an angle of between about 5 degrees and about 30 degrees in a first direction relative to a longitudinal axis of the shaft and each of the one or more paddles of the second set forms an angle of between about 5 degrees and about 30 degrees in a second direction opposite the first direction relative to the longitudinal axis of the shaft.

4. The replaceable unit of claim 1 , wherein adjacent paddles of the plurality of paddles alternate radially along a length of the shaft.

5. The replaceable unit of claim 1 , wherein at least one of a cross-sectional height and width of the reservoir is reduced at the first end of the reservoir relative to an adjacent portion of the reservoir.

6. A replaceable unit for an electrophotographic image forming device, comprising:
a housing having a reservoir for storing toner and an outlet for exiting toner from the housing, the reservoir has a first end and an opposed second end along a length of the housing;
a channel in the housing along at least a portion of the length of the housing, the channel has an inlet positioned between the first end and the second end of the reservoir, the inlet is in fluid communication with the reservoir for receiving toner from the reservoir and the channel is in fluid communication with the outlet for exiting toner from the channel;
a rotatable auger is positioned along the channel for moving toner in the channel toward the outlet;
a rotatable shaft has a first end at the first end of the reservoir and a second end at the second end of the reservoir, a first portion of the shaft is positioned between the first end of the reservoir and the inlet of the channel and a second portion of the shaft is positioned between the second end of the reservoir and the inlet of the channel;
a plurality of paddles rotatable with the shaft, each of the plurality of paddles is connected to the shaft by a corresponding pair of arms extending radially from the shaft, adjacent paddles of the plurality of paddles alternate radially along a length of the shaft, the plurality of paddles includes a first set of one or more paddles on the first portion of the shaft and a second set of one or more paddles on the second portion of the shaft, the first set of one or more paddles are angled to direct toner away from the first end of the reservoir and toward the inlet of the channel and the second set of one or more paddles are angled to direct toner away from the second end of the reservoir and toward the inlet of the channel; and
a flexible member on a distal end of each of the plurality of paddles, at least a portion of each flexible member has an interference contact with at least a portion of an interior surface of the housing,
wherein each of the plurality of paddles includes a rigid and substantially straight segment that extends along the length of the shaft and the flexible member is positioned on a distal end of the substantially straight segment and extends radially outward past the distal end of the substantially straight segment, a first axial end of the substantially straight segment is angularly offset from a second axial end of the substantially straight segment relative to a longitudinal axis of the shaft such that the substantially straight segment is angled relative to the longitudinal axis of the shaft,
wherein each of the plurality of paddles includes a plurality of ribs extending outward from the distal end of the substantially straight segment, the ribs are angled away from the flexible member trailing the flexible member in an operative rotational direction of the shaft and positioned to limit by contacting the flexible member how far the flexible member flexes counter to the operative rotational direction of the shaft.

7. The replaceable unit of claim 6 , wherein adjacent axial ends of the one or more paddles of at least one of the first set and the second set overlap axially with each other.

8. The replaceable unit of claim 6 , wherein each of the one or more paddles of the first set forms an angle of between about 5 degrees and about 30 degrees in a first direction relative to a longitudinal axis of the shaft and each of the one or more paddles of the second set forms an angle of between about 5 degrees and about 30 degrees in a second direction opposite the first direction relative to the longitudinal axis of the shaft.

9. The replaceable unit of claim 6 , wherein at least one of a cross-sectional height and width of the reservoir is reduced at the first end of the reservoir relative to an adjacent portion of the reservoir.

10. A replaceable unit for an electrophotographic image forming device, comprising:
a housing having a reservoir for storing toner and an outlet for exiting toner from the housing, the reservoir has a first end and an opposed second end;
a rotatable shaft having a first end at the first end of the reservoir and a second end at the second end of the reservoir; and
a plurality of paddle

Assignees

• Lexmark Int Inc

Inventors

• Leemhuis Michael Craig

Classifications

• G03G15/0865 Primary

  Arrangements for supplying new developer · CPC title

• G03G2215/0833

  with varying pitch on one shaft · CPC title

• G03G15/087 Primary

  Developer cartridges having a longitudinal rotational axis, around which at least one part is rotated when mounting or using the cartridge · CPC title

• G03G15/0891

  for conveying or circulating developer, e.g. augers · CPC title

• G03G15/0867

  cylindrical developer cartridges, e.g. toner bottles for the developer replenishing opening · CPC title