DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
First Claim
1. A developing device comprising:
- a developer tank that holds a two-component developer comprising a toner and a magnetic carrier; and
a transporting member that stirs and transports the two-component developer in the developer tank,the transporting member comprising;
a first screw comprising a first rotary shaft having a first spiral blade disposed on an outer circumferential face of the first rotary shaft; and
a second screw comprising a second rotary shaft having a second spiral blade disposed on an outer circumferential face of the second rotary shaft,the first screw and the second screw being disposed such that the first rotary shaft and the second rotary shaft are parallel to each other, and rotating to circulate the two-component developer in the developer tank, the developer tank comprising;
a first compartment accommodating the first screw;
a second compartment accommodating the second screw;
a partition that separates the first compartment and the second compartment; and
a circulation zone disposed at an end in an axial direction along the first and second rotary shafts,the circulation zone including an opening in the partition that allows the two-component developer to flow through between the first compartment and the second compartment,the first compartment and the second compartment having bottom faces at different heights, and a protrusion being formed on a bottom face in the circulation zone.
1 Assignment
0 Petitions
Accused Products
Abstract
A developing device includes a developer tank holding a developer, and a transporting member stirring and transporting the developer. The transporting member includes first and second screws each provided with a rotary shaft having a spiral blade disposed on an outer circumferential face of the rotary shaft. The first and second screws are disposed such that the rotary shafts are parallel to each other. The developer tank includes a first compartment accommodating the first screw, a second compartment accommodating the second screw, a partition separating the first compartment and the second compartment, and a circulation zone. The circulation zone includes an opening in the partition that allows the developer to flow through. The first and second compartments have bottom faces at different heights. A protrusion is formed on a bottom face in the circulation zone.
0 Citations
9 Claims
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1. A developing device comprising:
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a developer tank that holds a two-component developer comprising a toner and a magnetic carrier; and a transporting member that stirs and transports the two-component developer in the developer tank, the transporting member comprising; a first screw comprising a first rotary shaft having a first spiral blade disposed on an outer circumferential face of the first rotary shaft; and a second screw comprising a second rotary shaft having a second spiral blade disposed on an outer circumferential face of the second rotary shaft, the first screw and the second screw being disposed such that the first rotary shaft and the second rotary shaft are parallel to each other, and rotating to circulate the two-component developer in the developer tank, the developer tank comprising; a first compartment accommodating the first screw; a second compartment accommodating the second screw; a partition that separates the first compartment and the second compartment; and a circulation zone disposed at an end in an axial direction along the first and second rotary shafts, the circulation zone including an opening in the partition that allows the two-component developer to flow through between the first compartment and the second compartment, the first compartment and the second compartment having bottom faces at different heights, and a protrusion being formed on a bottom face in the circulation zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification