Cleaning apparatus and cleaning method
First Claim
1. A cleaning apparatus comprising:
- a scraping member for removing a developing agent left on a rotatable drum-like image carrier, a tip portion of the scraping member being in contact with the image carrier;
a receiving member located at an upstream side of the scraping member in a rotation direction of the image carrier, for receiving developing agent from the scraping member in contact with the image carrier; and
a rotational body for feeding and recovering the developing agent received by the receiving member by rotating the developing agent in a predetermined direction, the rotational body rotating in the same direction as the image carrier;
wherein, assuming that a rotation center of the image carrier is 01, a rotation center of the rotational body is 02, a contact point of the image carrier in contact with the scraping member is A, a contact point of the image carrier in contact with the receipt member is B, and further an angle between a line connecting the center 01 to the point A and a line connecting the center 01 to the center 02 is represented by a; and
an angle between the line connecting the center 01 to the point A and a line connecting the center 01 and point B is represented by b, the rotational body is placed at a position satisfying an equation as to the angle a;
1 Assignment
0 Petitions
Accused Products
Abstract
A cleaning apparatus comprising a scraping member for scraping a developing agent left on a rotatable image carrier by brining a tip portion of the scraping member in contact with the rotatable image carrier, a receipt member located at an upstream side of the scraping member in a rotation direction of the image carrier, for receiving the developing agent scraped by the scraping member by bringing a tip portion of the scraping member in contact with the image carrier, and a rotational body for feeding and recovering the developing agent received by the receipt member by rotating the developing agent in a predetermined direction, in which, assuming that a rotation center of the image carrier is 01, a rotation center of the rotational body is 02, a contact point of the image carrier in contact with the scraping member is A, a contact point of the image carrier in contact with the receipt member is B, and further an angle between a line connecting the center 01 to the point A and a line connecting the center 01 to the center 02 is represented by a, and an angle between the line connecting the center 01 to the point A and a line connecting the center 01 and point B is represented by b, the rotational body is placed at a position satisfying an equation as to the angle a:
21 Citations
14 Claims
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1. A cleaning apparatus comprising:
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a scraping member for removing a developing agent left on a rotatable drum-like image carrier, a tip portion of the scraping member being in contact with the image carrier;
a receiving member located at an upstream side of the scraping member in a rotation direction of the image carrier, for receiving developing agent from the scraping member in contact with the image carrier; and
a rotational body for feeding and recovering the developing agent received by the receiving member by rotating the developing agent in a predetermined direction, the rotational body rotating in the same direction as the image carrier;
wherein, assuming that a rotation center of the image carrier is 01, a rotation center of the rotational body is 02, a contact point of the image carrier in contact with the scraping member is A, a contact point of the image carrier in contact with the receipt member is B, and further an angle between a line connecting the center 01 to the point A and a line connecting the center 01 to the center 02 is represented by a; and
an angle between the line connecting the center 01 to the point A and a line connecting the center 01 and point B is represented by b, the rotational body is placed at a position satisfying an equation as to the angle a;
- View Dependent Claims (2, 3, 4, 5)
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6. A cleaning apparatus comprising:
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a scraper member for scraping a magnetic developing agent left on a rotatable image carrier by brining a tip portion of the scraping member in contact with the rotatable image carrier;
a receipt member located at an upstream side of the scraping member in a rotation direction of the image carrier, for receiving the magnetic developing agent scraped by the scraping member; and
a magnetic rotational body for feeding an recovering the magnetic developing agent received by the receipt member by rotating the magnetic developing agent in a predetermined direction the magnetic rotational body rotating in the same direction as the image carrier;
wherein, assuming that a rotation center of the image carrier is 01, a rotation center of the magnetic rotational body is 02, a contact point of the image carrier in contact with the scraping member is A, a contact point of the image carrier in contact with the receipt member is B, and further an angle between a line connecting the center 01 to the point A and a line connecting the center 01 to the center 02 is represented by a; and
an angle between the line connecting the center 01 to the point A and a line connecting A and a line connecting the center 01 and point B is represented by, b the magnetic rotational body is placed at a position satisfying an equation as to the angle a;
- View Dependent Claims (7, 8)
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9. A cleaning method comprising the steps of:
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scraping a developing agent left on a rotatable drum-like image carrier by a scraping member by bringing a tip portion of the scraping member in contact with the rotational image carrier;
receiving the developing agent scraped by the scraping member, using a receipt member which is positioned at an upstream side of the scraping member in a rotational direction of the image carrier by bringing a tip portion of the receipt member in contact with the image carrier; and
recovering the developing agent received by the receipt member by feeding in a predetermined direction with the aid of a rotational body which rotates in the same direction as the image carrier, wherein, assuming that a rotation center of the image carrier is 01, a rotation center of the rotational body is 02, a contact point of the image carrier in contact with the scraping member is A, a contact point of the image carrier in contact with the receipt member is B, and further an angle between a line connecting the center 01 to the point A and a line connecting the center 01 to the center 02 is represented by a; and
an angle between the line connecting the center 01 to the point A and a line connecting the center 01 and point B is represented by b, the rotational body is placed at a position satisfying an equation as to the angle a;
- View Dependent Claims (10, 11, 12, 13)
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14. An image forming apparatus having an image forming means for forming an electrostatic latent image on a rotatable drum-like image carrier, a developing means for developing an image by supplying a developing agent to said electrostatic latent image formed by said image forming means, a transfer means for transferring said image developed by said developing means to a material to be transferred, a fixing means for fixing the developed image, which is transferred by said transfer means, on said material, and a cleaning apparatus provided above said image carrier for removing the developing agent left on the image carrier after the transfer of said developed image,
said cleaning apparatus comprising: -
a scraping means for removing the developing agent left on said image carrier;
a receipt member located at an upstream side of the scraping member in a rotation direction of the image carrier, for receiving the developing agent bringing a tip portion of the scraping member in contact with the image carrier; and
a rotational body for feeding and recovering the developing agent received by said receipt member by rotating the developing agent in a predetermined direction, the rotational body rotating in the same direction as the image carrier, wherein, assuming that a rotation center of the image carrier is 01, a rotation center of the rotational body is 02, a contact point of the image carrier in contact with the scraping member is A, a contact point of the image carrier in contact with the receipt member is B, and further an angle between a line connecting the center 01 to the point A and a line connecting the center 01 to the center 02 is represented by a; and
an angle between the line connecting the center 01 to the point A and a line connecting the center 01 and point B is represented by b, the rotational body is placed at a position satisfying an equation as to the angle a;
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Specification