DEVELOPING APPARATUS
First Claim
1. A developing apparatus comprising:
- a developing container for accommodating a developer including magnetic particles;
a developer feeding member, provided in said developing container and having a magnetic shaft, for feeding the developer by rotation of the shaft;
a bearing rotatably supporting said shaft;
a bearing accommodating portion for accommodating said bearing; and
a magnet, provided around said shaft at a position inside said bearing in said bearing accommodating portion, for forming a magnetic seal of magnetic particles by a magnetic field formed between itself and said shaft;
wherein said bearing accommodating portion includes a first space between said magnet and said bearing and a second space which is provided outside of said bearing with respect to a diametrical direction and which is in fluid communication with said first space to receive the developer from said first space.
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Accused Products
Abstract
A developing apparatus includes a developing container for accommodating a developer including magnetic particles; a developer feeding member, provided in the developing container and having a magnetic shaft, for feeding the developer; a bearing rotatably supporting the shaft; a bearing accommodating portion; and a magnet, provided around the shaft at a position inside the bearing in the bearing accommodating portion, for forming a magnetic seal of magnetic particles by a magnetic field formed between itself and the shaft; wherein the bearing accommodating portion includes a first space between the magnet and the bearing and a second space which is provided outside of the bearing with respect to a diametrical direction and which is in fluid communication with the first space to receive the developer from the first space.
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Citations
10 Claims
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1. A developing apparatus comprising:
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a developing container for accommodating a developer including magnetic particles; a developer feeding member, provided in said developing container and having a magnetic shaft, for feeding the developer by rotation of the shaft; a bearing rotatably supporting said shaft; a bearing accommodating portion for accommodating said bearing; and a magnet, provided around said shaft at a position inside said bearing in said bearing accommodating portion, for forming a magnetic seal of magnetic particles by a magnetic field formed between itself and said shaft; wherein said bearing accommodating portion includes a first space between said magnet and said bearing and a second space which is provided outside of said bearing with respect to a diametrical direction and which is in fluid communication with said first space to receive the developer from said first space. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10)
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3. A developing apparatus comprising:
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a developing container for accommodating a developer including magnetic particles, said developer container including a first chamber and a second chamber; a first developer feeding member, provided in said first chamber and having a first magnetic shaft, for feeding the developer by rotation of the first shaft; a first bearing rotatably supporting said first shaft in said first chamber; a first bearing accommodating portion for accommodating said first bearing; a first magnet, provided around said first shaft at a position inside said first bearing in said first bearing accommodating portion, for forming a first magnetic seal of magnetic particles by a magnetic field formed between itself and said first shaft, wherein said first bearing accommodating portion includes a first space between said first magnet and said first bearing and a second space which is provided outside of said first bearing with respect to a diametrical direction and which is in fluid communication with said first space to receive the developer from said first space; a second developer feeding member, provided in said second chamber and having a second magnetic shaft, for feeding the developer by rotation of the second shaft; a second bearing rotatably supporting said second shaft in said second chamber; a second bearing accommodating portion for accommodating said second bearing; and a second magnet, provided around said second shaft at a position inside said second bearing in said second bearing accommodating portion, for forming a second magnetic seal of magnetic particles by a magnetic field formed between itself and said second shaft, wherein said second bearing accommodating portion includes a third space between said second magnet and said second bearing. - View Dependent Claims (4)
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Specification