Developing device, and image forming apparatus including developing device
AssigneeKYOCERA Document Solutions Inc.
InventorYasuhiro Tauchi
Life of this patent
Estimating the term…
Abstract
In a developing device, a sheet member is provided via a gap at a second specific position in a specific region between a position on a downstream side in a first rotation direction relative to a first specific position, and a high-magnetic-force position at which an intensity of a magnetic force is the highest in a second region, on the outer circumferential surface of a developer carrying body. The sheet member limits a layer thickness of a two-component developer carried on the developer carrying body rotating in a second rotation direction. The sheet member is able to elastically deform in accordance with application of a pressing force equal to or greater than a tolerable value in the first rotation direction or the second rotation direction.
Claims9
A developing device comprising:
- a developer reservoir in which a two-component developer is stored;
- a developer carrying body supported so as to be rotatable in a first rotation direction and a second rotation direction, the developer carrying body being configured to rotate in the first rotation direction, thereby carrying the two-component developer stored in the developer reservoir on an outer circumferential surface of the developer carrying body and feeding, in a first region on the outer circumferential surface, toner contained in the two-component developer to a toner carrying body at a next stage;
- a magnetic pole member configured to generate a magnetic force in a direction to separate the two-component developer from the developer carrying body, in a second region on a downstream side in the first rotation direction relative to the first region on the outer circumferential surface of the developer carrying body;
- a layer thickness limiting member provided via a gap at a first specific position on an upstream side in the first rotation direction relative to the first region on the outer circumferential surface of the developer carrying body, the layer thickness limiting member being configured to limit a layer thickness of the two-component developer carried on the developer carrying body rotating in the first rotation direction;
- and
- a sheet member provided via a gap at a second specific position in a specific region between a position on a downstream side in the first rotation direction relative to the first specific position, and a high-magnetic-force position at which an intensity of the magnetic force is the highest in the second region, on the outer circumferential surface of the developer carrying body, the sheet member being configured to limit a layer thickness of the two-component developer carried on the developer carrying body rotating in the second rotation direction, the sheet member being able to elastically deform in accordance with application of a pressing force equal to or greater than a tolerable value in the first rotation direction or the second rotation direction.
Dependencies are inferred from the claim text.