Image forming apparatus
First Claim
1. An image forming apparatus, comprising:
- a body;
a drawer unit movable between an inside position, in which the drawer unit is inside the body, and an outside position, in which the drawer unit is outside the body;
a first drum cleaner configured to remove waste toner from a first photosensitive drum, the first drum cleaner including a first cleaning blade contacting the first photosensitive drum, and a first screw extending in an axial direction of the first photosensitive drum;
a second drum cleaner configured to remove waste toner from a second photosensitive drum, the second drum cleaner including a second cleaning blade contacting the second photosensitive drum, and a second screw extending in an axial direction of the second photosensitive drum; and
a positioning plate including;
a first positioning dent configured to position the first photosensitive drum relative to the body when the drawer unit is in the inside position; and
a second positioning dent configured to position the second photosensitive drum relative to the body when the drawer unit is in the inside position;
a waste toner conveyer configured to convey the waste toner removed by the first drum cleaner and the second drum cleaner, the waste toner conveyer including a conveyer tube and a conveyer screw arranged inside the conveyer tube, the waste toner conveyer extending in a direction along the positioning plate,wherein, when the drawer unit is in the inside position and when viewed in a direction perpendicular to the axial direction of the first photosensitive drum, the positioning plate is disposed between at least a portion of the drawer unit and the conveyer screw, andwherein, when the drawer unit is in the inside position and when viewed in the direction perpendicular to the axial direction of the first photosensitive drum, the first screw and the second screw extend from a drawer unit side of the positioning plate toward a conveyer screw side of the positioning plate crossing over an upper end of the positioning plate.
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Accused Products
Abstract
An image forming apparatus, including a body with an aperture, a processing unit movable between an inside position and an outside position, and a transfer unit, is provided. The processing unit includes first and second drum cleaners to remove waste toner from first and second photosensitive drums respectively; and a waste toner conveyer including a conveyer tube longitudinally extending in a movable direction of the processing unit, a port, a conveyer screw located inside the conveyer tube, and a shutter movable between an opening position and a closed position to open and close the port. The transfer unit includes a belt unit with a belt arranged to contact the first photosensitive drum and the second photosensitive drum, and a belt cleaner including a container with an opening which communicates with the port of the conveyer tube when the processing unit is in the inside position.
31 Citations
22 Claims
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1. An image forming apparatus, comprising:
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a body; a drawer unit movable between an inside position, in which the drawer unit is inside the body, and an outside position, in which the drawer unit is outside the body; a first drum cleaner configured to remove waste toner from a first photosensitive drum, the first drum cleaner including a first cleaning blade contacting the first photosensitive drum, and a first screw extending in an axial direction of the first photosensitive drum; a second drum cleaner configured to remove waste toner from a second photosensitive drum, the second drum cleaner including a second cleaning blade contacting the second photosensitive drum, and a second screw extending in an axial direction of the second photosensitive drum; and a positioning plate including; a first positioning dent configured to position the first photosensitive drum relative to the body when the drawer unit is in the inside position; and a second positioning dent configured to position the second photosensitive drum relative to the body when the drawer unit is in the inside position; a waste toner conveyer configured to convey the waste toner removed by the first drum cleaner and the second drum cleaner, the waste toner conveyer including a conveyer tube and a conveyer screw arranged inside the conveyer tube, the waste toner conveyer extending in a direction along the positioning plate, wherein, when the drawer unit is in the inside position and when viewed in a direction perpendicular to the axial direction of the first photosensitive drum, the positioning plate is disposed between at least a portion of the drawer unit and the conveyer screw, and wherein, when the drawer unit is in the inside position and when viewed in the direction perpendicular to the axial direction of the first photosensitive drum, the first screw and the second screw extend from a drawer unit side of the positioning plate toward a conveyer screw side of the positioning plate crossing over an upper end of the positioning plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An image forming apparatus, comprising:
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a body; a processing unit movable between an inside position, in which the processing unit is inside the body, and an outside position, in which the processing unit is outside the body; a first drum cleaner configured to remove waste toner from a first photosensitive drum, the first drum cleaner including a first cleaning blade contacting the first photosensitive drum, and a first screw extending in an axial direction of the first photosensitive drum; a second drum cleaner configured to remove waste toner from a second photosensitive drum, the second drum cleaner including a second cleaning blade contacting the second photosensitive drum, and a second screw extending in an axial direction of the second photosensitive drum; a transfer unit including a belt unit and a belt cleaner; and a positioning plate including; a first positioning dent configured to position the first photosensitive drum relative to the body when the processing unit is in the inside position and a portion of the first photosensitive drum is disposed within the first positioning dent; and a second positioning dent configured to position the second photosensitive drum relative to the body when the processing unit is in the inside position and a portion of the second photosensitive drum is disposed within the second positioning dent; a waste toner conveyer configured to convey the waste toner removed by the first drum cleaner and the second drum cleaner, the waste toner conveyer including a conveyer tube and a conveyer screw arranged inside the conveyer tube, the waste toner conveyer extending in a direction along the positioning plate; wherein the conveyer screw is arranged outside the positioning plate in the axial direction of the first photosensitive drum and inside the body when the processing unit is in the inside position, wherein the waste toner conveyer includes a port and a shutter, the shutter being movable between an opening position in which the port is open and a closed position in which the port is closed, wherein the belt unit includes a belt configured to contact the first photosensitive drum and the second photosensitive drum, wherein the belt cleaner includes a container, the container having an opening which communicates with the port of the conveyer tube when the processing unit is in the inside position, and wherein the processing unit is movable from the inside position to the outside position independently of the container of the belt cleaner such that that the container remains inside the body when the processing unit is at the outside position.
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22. An image forming apparatus, comprising:
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a body; a processing unit movable between an inside position, in which the processing unit is inside the body, and an outside position, in which the processing unit is outside the body; a first drum cleaner configured to remove waste toner from a first photosensitive drum, the first drum cleaner including a first cleaning blade contacting the first photosensitive drum, and a first screw extending in an axial direction of the first photosensitive drum; a second drum cleaner configured to remove waste toner from a second photosensitive drum, the second drum cleaner including a second cleaning blade contacting the second photosensitive drum, and a second screw extending in an axial direction of the second photosensitive drum; a transfer unit including a belt unit and a belt cleaner; and a positioning plate including; a first positioning dent configured to position the first photosensitive drum relative to the body when the processing unit is in the inside position and a portion of the first photosensitive drum is disposed within the first positioning dent; and a second positioning dent configured to position the second photosensitive drum relative to the body when the processing unit is in the inside position and a portion of the second photosensitive drum is disposed within the second positioning dent; a waste toner conveyer configured to convey the waste toner removed by the first drum cleaner and the second drum cleaner, the waste toner conveyer including a conveyer tube and a conveyer screw arranged inside the conveyer tube, the waste toner conveyer extending in a direction along the positioning plate; wherein the conveyer screw is arranged outside the positioning plate in the axial direction of the first photosensitive drum and inside the body when the processing unit is in the inside position, wherein the waste toner conveyer includes a port and a shutter, the shutter being movable between an opening position in which the port is open and a closed position in which the port is closed, wherein the belt unit includes a belt configured to contact the first photosensitive drum and the second photosensitive drum, wherein the belt cleaner includes a container, the container having an opening which communicates with the port of the conveyer tube when the processing unit is in the inside position, and wherein an entirety of the container of the belt cleaner is disposed lower than the processing unit when the processing unit is in the inside position.
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Specification