Monocomponent developing device
AssigneeMinolta Camera Kabushiki Kaisha
InventorsYuji Enoguchi, Toshiya Natsuhara, Masashi Yamamoto
Life of this patent
Estimating the term…
Abstract
A developing device adjoins a rotatably arranged photoreceptor, and is internally provided with a rotatably disposed developing roller confronting the photoreceptor. A cylindrically formed flexible film member having a peripheral length longer than that of the developing roller and loosely mounted thereover is included. A first member for forming a slack portion of the film member, for example, a regulating blade or a cleaning blade, and a second member for controlling the position of the slack portion of the film member, for example, a magnet is provided in the developing device.
Claims8
A developing device disposed adjacently to a rotatably arranged photoreceptor, which comprises:
- a rotatably disposed developing roller confronting said photoreceptor;
- a cylindrically formed flexible member having a peripheral length longer than that of said developing roller and loosely mounted thereover;
- and
- positioning means to position said flexible member partly into contact with and out of contact with said photoreceptor, said positioning means including means to form a first slack portion of the flexible member at a location confronting said photoreceptor for the flexible member to contact with the photoreceptor while the remaining portion of the flexible member is in contact with the developing roller and to form a second slack portion of the flexible member at a location remote from the location confronting said photoreceptor for the flexible member to be out of contact with the photoreceptor.
A developing device disposed adjacently to a rotatably arranged photoreceptor, which comprises:
- a rotatably disposed developing roller confronting said photoreceptor;
- a cylindrically formed flexible member having a peripheral length longer than that of said developing roller and loosely mounted thereover;
- and
- positioning means, which includes magnetic means, to position said flexible member partly into contact with and out of contact with said photoreceptor for forming a first slack portion of the flexible member at a location confronting said photoreceptor for the flexible member to contact with the photoreceptor while the remaining portion of the flexible member is in contact with the developing roller during the development and forming a second slack portion of the flexible member at a location remote from the location confronting said photoreceptor for the flexible member to be out of contact with the photoreceptor during non-development.
A developing device disposed adjacently to a rotatably arranged photoreceptor, which comprises:
- a rotatably disposed developing roller confronting said photoreceptor;
- a cylindrically formed flexible member having a peripheral length longer than that of said developing roller and loosely mounted thereover;
- a rotatably arranged regulating roller which presses said flexible member at one of an upstream side and downstream side from a region where the development is carried out with respect to a direction of the rotation of the developing roller;
- and
- controlling means for controlling said regulating roller so as to rotate in a first predetermined direction for forming a first slack portion of the flexible member at a location confronting said photoreceptor for the flexible member to contact with the photoreceptor while the remaining portion of the flexible member is in contact with the developing roller during the development and so as to rotate in a direction opposite to the first predetermined direction for forming a second slack portion of the flexible member at a location remote from the location confronting said photoreceptor for the flexible member to be out of contact with the photoreceptor during non-development.
A developing device disposed adjacently to a rotatably arranged photoreceptor, which comprises:
- a rotatably disposed developing roller confronting said photoreceptor;
- a cylindrically formed flexible member having a peripheral length longer than that of said developing roller and loosely mounted thereover;
- a rotatably arranged guide member located in each end of said developing roller to hold said flexible member in contact with the developing roller;
- and
- controlling means for controlling said guide member to rotate the same for forming a first slack portion of the flexible member at a location confronting said photoreceptor for the flexible member to contact with the photoreceptor while the remaining portion of the flexible member is in contact with the developing roller during the development and rotated further to form a second slack portion of the flexible member at a location remote from the location confronting said photoreceptor for the flexible member to be out of contact with the photoreceptor during non-development.
Dependencies are inferred from the claim text.