Developing apparatus including first and second agitating members in which the first agitating member includes non-screw portion
AssigneeRicoh Company, Ltd.
InventorsKazuhiko Yuuki, Yoshinori Ozawa
Life of this patent
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Abstract
In a developing apparatus, the interior of a case is divided into a first space positioned on a developer supply side for the supply of a developer to an image bearing member and a second space which is supplied with a replenishing toner, first and second agitating members are included and are adapted to be rotated to agitate and convey the developer are disposed within the first and second spaces, respectively, and a screw member is provided having n threads (n≧2) is used as the first agitating member disposed in the first space, and a screw member having (n−x) threads (x≧0) is used as the second agitating member disposed in the second space.
Claims11
A developing apparatus comprising:
- a case divided into a first space located at a developer supply side for supplying the developer to an image bearing member and a second space for receiving a replenishing toner;
- and
- a first and a second agitating member arranged in the first and the second spaces in such a manner that the first and the second agitating members are positioned parallel to each other and are driven to rotate to agitate and convey the developer,
- wherein the first agitating member arranged in the first space is a screw member having n threads (n>2), and the second agitating member arranged in the second space is a screw member having (n−x) threads (x≧0), and
- wherein a non-screw portion is formed at a portion between the threads of the second agitating member located at a predetermined interval in a convey direction of the developer conveyed by the second agitating member.
An image formation apparatus comprising:
- an image bearing member, and a developer device for supplying developer to an electrostatic latent image formed on the image bearing member,
- wherein the developer device includes a developing apparatus includes:
- a case divided into a first space located at a developer supply side for supplying the developer to an image bearing member and a second space for receiving a replenishing toner;
- and
- a first and a second agitating member arranged in the first and the second spaces in such a manner that the first and the second agitating members are positioned parallel to each other and are driven to rotate to agitate and convey the developer,
- wherein the first agitating member arranged in the first space is a screw member having n threads (n>2), and the second agitating member arranged in the second space is a screw member having (n−x) threads (x≧0), and
- wherein a non-screw portion is formed at a portion between the threads of the second agitating member located at a predetermined interval in the convey direction of the developer conveyed by the second agitating member.
Dependencies are inferred from the claim text.