Image forming apparatus having control unit
First Claim
Patent Images
1. An image forming apparatus comprising:
- an image supporting member;
a developer supporting member for attaching developer to the image supporting member to form a developer image;
a transfer unit for transferring the developer image to a recording medium;
a fixing unit for fixing the developer image to the recording medium at a fixing temperature;
an external temperature detection unit for detecting an environmental temperature outside the image forming apparatus;
a sheet number storage unit for storing a number of the recording media;
an ID motor powered time measuring unit for measuring a period of powered time of an ID motor;
a fixing motor powered time measuring unit for measuring a period of powered time of a fixing motor; and
a control unit for changing a target temperature according to the environmental temperature and the number of the recording media so that the fixing temperature of the fixing unit becomes the target temperature, said control unit setting the fixing temperature according to the environmental temperature, the period of powered time of the ID motor, and the period of powered time of the fixing motor.
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Abstract
An image forming apparatus includes an image supporting member; a developer supporting member for attaching developer to the image supporting member to form a developer image; a transfer unit for transferring the developer image to a recording medium; a driving unit for driving at least one of the image supporting member, the developer supporting member, and the transfer unit; an external temperature detection unit for detecting an environmental temperature outside the image forming apparatus; and a control unit for setting a driving speed of the driving unit according to the environmental temperature.
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Citations
20 Claims
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1. An image forming apparatus comprising:
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an image supporting member; a developer supporting member for attaching developer to the image supporting member to form a developer image; a transfer unit for transferring the developer image to a recording medium; a fixing unit for fixing the developer image to the recording medium at a fixing temperature; an external temperature detection unit for detecting an environmental temperature outside the image forming apparatus; a sheet number storage unit for storing a number of the recording media; an ID motor powered time measuring unit for measuring a period of powered time of an ID motor; a fixing motor powered time measuring unit for measuring a period of powered time of a fixing motor; and a control unit for changing a target temperature according to the environmental temperature and the number of the recording media so that the fixing temperature of the fixing unit becomes the target temperature, said control unit setting the fixing temperature according to the environmental temperature, the period of powered time of the ID motor, and the period of powered time of the fixing motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An image forming apparatus comprising:
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an image supporting member; a developer supporting member for attaching developer to the image supporting member to form a developer image; a transfer unit for transferring the developer image to a recording medium; a fixing unit for fixing the developer image to the recording medium at a fixing temperature; an external temperature detection unit for detecting an environmental temperature outside the image forming appparatus; a sheet number storage unit for storing a number of the recording media; an ID motor powered time measuring unit for measuring a period of powered time of an ID motor; a fixing motor powered time measuring unit for measuring a period of powered time of a fixing motor; and a control unit for changing a target temperature according to the environmental temperature and the number of the recording media so that the fixing temperature of the fixing unit becomes the target temperature, said control unit determining whether a continuous printing operation or an intermittent printing operation is performed according to the environmental temperature, the period of powered time of the ID motor, and the period of powered time of the fixing motor.
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Specification