Auger for use within an image forming device
View Patent ↗Embodiments for a toner auger for use in an image forming device. The image forming device includes a channel through which toner is moved. The auger is positioned within the channel and has an axis of rotation and at least one offset section extending radially outward from the axis of rotation. The offset section forms a sweep envelope that extends outward from the axis of rotation. The auger may be positioned within the channel for the offset to contact the channel. Contact may cause a vibratory force that prevents the toner from clogging and bridging within the channel.
1. A device to move toner in an image forming apparatus, comprising:
a channel with a first width that is sized to contain the toner; and
a helical wire auger rotatably positioned within the channel to move the toner along the channel;
the auger having a centerline of an axis of rotation positioned within the channel and an offset forming a sweep envelope, a longitudinal section of the sweep envelope greater than the first width of the channel for the auger to contact the channel during rotation, and an open space formed within the sweep envelope between the wire auger and the centerline such that all points along one complete revolution around the wire auger at the offset are positioned on one side of the centerline of the axis of rotation.
2. The device of claim 1 , wherein the auger has a curved configuration with the offset located along a central section between first and second ends of the auger.
3. The device of claim 1 , wherein the channel and the axis of rotation of the auger are both substantially linear.
4. The device of claim 1 , wherein the auger is constructed of an elastic material that deforms during contact with the channel.
5. The device of claim 1 , wherein the channel has a polygonal cross-sectional shape.
6. The device of claim 1 , wherein the channel has a circular cross-sectional shape.
7. A device to move toner within an image forming apparatus, comprising:
a housing having a channel with a first width sized to contain the toner; and
an auger rotatably positioned within the channel to move the toner along the channel;
the auger having an axis of rotation and an offset positioned from the axis of rotation at an axial position along the auger, the offset having a sweep envelope greater than the remainder of the auger, the auger positioned within the channel with the offset contacting the channel during rotation of the auger, the auger including an internal bore generally in the direction of the axis of rotation;
the auger including a second offset positioned at a second axial position along the auger, the second offset being axially spaced apart from the offset.
8. The device of claim 7 , wherein the offset contacts the channel at two points during rotation of the auger.
9. The device of claim 7 , wherein the offset has an edge that is substantially parallel with the axis of rotation.
10. The device of claim 7 , wherein the auger has a curved configuration with the offset positioned at a central area between first and second ends of the auger.
11. The device of claim 7 , wherein the offset is tapered.
12. The device of claim 7 , wherein the axis of rotation and the housing are both substantially linear.
13. The device of claim 7 , wherein the offset is a different size than the second offset.
14. The device of claim 7 , wherein the auger is constructed of an elastic material that deforms during contact with the channel.
15. The device of claim 7 , wherein the auger is vertically positioned within the image forming apparatus.
16. A device to move waste toner within an image forming apparatus, comprising:
a toner cartridge having a channel with a first width that is sized to contain the waste toner;
a photoconductive member positioned within the toner cartridge;
an auger rotatably positioned within the channel to move the waste toner along the channel; and
the auger having an axis of rotation and an offset extending from the axis of rotation at an axial position along the auger, the offset having a sweep envelope greater than a remainder of the auger, the auger positioned within the channel with the offset contacting the channel during rotation of the auger, and a radius of the auger less than a maximum radius of the sweep envelope;
wherein the axis of rotation is positioned entirely outside the auger at the axial position.
17. A method of moving toner in an image forming apparatus, the method comprising the steps of:
rotating a wire auger with a generally spiral shape and a continuous open space within the spiral within a channel and moving the toner along the channel;
contacting an offset section of the auger against the channel during each auger rotation;
building a mechanical force within the auger;
deforming the offset section against the channel; and
continuing rotation of the auger and releasing the mechanical force in the auger.
18. The method of claim 17 , further comprising contacting a central section of the channel with the offset.
19. The method of claim 17 , further comprising contacting the offset section against the channel twice during each auger rotation.
20. The method of claim 17 , further comprising contacting a second offset against the channel at a position that is axially spaced from the offset.
21. The method of claim 20 , further comprising imparting a first vibratory force during contact with the offset and a second larger vibratory force during contact with the second offset.
22. The method of claim 17 , further comprising the step of rotating the auger at a first speed prior to contacting the channel and rotating the auger at a second speed greater than the first speed immediately after releasing the mechanical force.