Image-forming device

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• a voltage supplying member (16) for supplying a voltage corresponding to the image signal to the control electrodes (10);
• an image receiving member (7) for receiving the developer (2) passed through;
• and
• a backside electrode (6) for drawing the developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein an external electrode (22) receiving a desired voltage is installed outside at both ends of a control electrode row (5) where the control electrodes (10) are arranged.

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of an electrode row (31), arranged in an area which is adjacent to said developer carrier (1) in said developer passing controller (3), is narrower than the width of a developer layer held on said developer carrier (1), viewed from a direction perpendicular to a moving direction of said image receiving member (7), and both ends of the electrode row (31) are arranged inside both ends of the developer layer.

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• a maintaining member (32) for maintaining a distance from a developer layer on said developer carrier (1) to said developer passing controller (3) constantly by contacting a developer layer on said developer carrier (1) and the developer passing controller (3);
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of an electrode row (31), arranged in an area which is adjacent to said developer carrier (1) in said developer passing controller (3), is narrower than the width of the maintaining member (32), viewed from a direction perpendicular to a moving direction of the image receiving member (7), and both ends of the electrode row (31) are arranged inside both ends of said maintaining member (32).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of said image receiving member (7) is wider than the width of the backside electrode (6), viewed from a direction perpendicular to a moving direction of said image receiving member (7), and both ends of said image receiving member (7) are arranged outside both ends of the backside electrode (6).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of the developer passing controller (3) is wider than either of the width of the developer carrier (1) and the width of the backside electrode (6), viewed from a direction perpendicular to a moving direction of said image receiving member (7), and both ends of the developer passing controller (3) are arranged outside either of both ends of the developer carrier (1) and both ends of the backside electrode(6).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• a maintaining member (32) for maintaining a distance from a developer layer on said developer carrier (1) to said developer passing controller (3) constantly by contacting the developer layer on said developer carrier (1) and the developer passing controller (3);
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of the developer layer is narrower than the width of the maintaining member (32), viewed from a direction perpendicular to a moving direction of the image receiving member (7), and both ends of the developer layer are arranged inside from both ends of the maintaining member (32).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• a maintaining member (32) for maintaining a distance from a developer layer on said developer carrier (1) to said developer passing controller (3) constantly by contacting the developer layer on said developer carrier (1) and the developer passing controller (3);
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of the developer passing controller (3) is wider than the width of the maintaining member (32), viewed from a direction perpendicular to a moving direction of the image receiving member (7), and both ends of the developer passing controller (3) are arranged outside both ends of the maintaining member (32).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• a maintaining member (32) for maintaining a distance from a developer layer on said developer carrier (1) to said developer passing controller (3) constantly by contacting the developer layer on said developer carrier (1) and the developer passing controller (3);
• an image receiving member (7) for receiving said developer (2) passed through;
• and
• a backside electrode (6) for drawing said developer (2), the backside electrode being installed at the back side of the image receiving member (7),
• wherein the width of said developer carrier (1) is wider than the width of the maintaining member (32), viewed from a direction perpendicular to a moving direction of said image receiving member (7), and both ends of said developer carrier (1) are arranged outside both ends of said maintaining member (32).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged he to surround the surroundings of the developer passing holes;
• an image receiving member (7) for receiving said developer (2) passed through;
• a backside electrode (6) for drawing said developer (2) with electromagnetic force, the backside electrode having an opening (33) and being installed at the back side of the image receiving member (7);
• and
• an airflow generating member (34) for drawing said developer (2) adhered to the developer passing controller (3) with airflow,
• wherein the width of the opening (33) is wider than the width of an electrode row (31) located in a region which is adjacent to the developer carrier (1) in said developer passing controller (3), viewed from a direction perpendicular to a moving direction of said image receiving member (7), and both ends of the opening (33) are arranged outside both ends of the electrode row (31).

An image forming device comprising:

• a developer carrier (1) for carrying a charged developer (2);
• a developer passing controller (3) for controlling the passing of said developer (2) by applying a voltage corresponding to an image signal to a plurality of control electrodes (10), the developer passing controller having a plurality of developer passing holes (4) through which the developer (2) passes and said control electrodes being arranged to surround the surroundings of the developer passing holes;
• an image receiving member (35) for receiving said developer (2) passed through, the image receiving member (35) having a second opening (38);
• a backside electrode (6) for drawing said developer (2) with electromagnetic force, the backside electrode having a first opening (33) and being installed at the back side of the image receiving member (35);
• and
• an airflow generating member (34) for drawing said developer (2) adhered to the developer passing controller (3) to the first opening (33) through the second opening (38) with airflow,
• wherein the width of said first opening (33) is wider than the width of said second opening (38), viewed from a direction perpendicular to a moving direction of said image receiving member (35), and both ends of said first opening (33) are arranged outside both ends of said second opening (38).