Image forming apparatus and method of controlling the same
AssigneeSamsung Electronics Co., Ltd.
InventorsJoong-gwang Shin, Sung-min Park
Life of this patent
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Abstract
An image forming apparatus includes a photosensitive medium to be charged with a predetermined potential by a charging member, an exposing unit to expose the photosensitive medium to vary a charging level of the photosensitive medium, a developing unit to form an image for one or more colors on the photosensitive medium, a transfer medium to transfer the image from the photosensitive medium, a cleaning unit to clean the transfer medium, and a controller to control an optical power of the exposing unit to be lower than that during forming of the image when a toner band is applied to lubricate at least one of the cleaning unit and the transfer medium.
Claims18
An image forming apparatus, comprising:
- a photosensitive medium to be charged with a predetermined potential by a charging member;
- an exposing unit to expose the photosensitive medium to vary a charging level of the photosensitive medium;
- a developing unit to form an image for one or more colors on the photosensitive medium;
- a transfer medium to transfer the image from the photosensitive medium;
- a cleaning unit to clean the transfer medium;
- and
- a controller to control an optical power of the exposing unit to be lower than that during forming of the image when a toner band is applied to lubricate at least one of the cleaning unit and the transfer medium.
A method of controlling an image forming apparatus, comprising:
- forming a first color image on a photosensitive medium, and transferring the image to a transfer medium;
- forming a second color image on the photosensitive medium, and transferring the image to the transfer medium to superimpose the second color image on the first color image;
- and
- applying a toner band to lubricate a cleaning unit which cleans the transfer medium at an interval between the forming the first color image operation and the forming the second color image operation;
- wherein the toner band is applied in a density lower than a density of the first and second color images.
An image forming apparatus, comprising:
- a photosensitive medium to be charged with a predetermined potential by a charging member;
- an exposing unit to expose the photosensitive medium to vary a charging level of the photosensitive medium;
- a developing unit to form an image for one or more colors on the photosensitive medium;
- a cleaning unit to clean the photosensitive medium;
- and
- a controller to control an optical power of the exposing unit to be lower than that during forming of the image when a toner band is applied to lubricate at least one of the cleaning unit and the photosensitive medium.
An image forming apparatus, comprising:
- a photosensitive medium formed with a visible image on a surface thereof by a toner;
- a potential applicator to apply a potential to the photosensitive medium;
- a developing unit to supply the toner to the photosensitive medium to form an image;
- a cleaning unit to clean the photosensitive medium;
- and
- a controller to control the potential applied by the potential applicator so that a density of the toner is lower than that during forming of the image if a toner band is applied to lubricate at least one of the cleaning unit and the photosensitive medium.
An image forming apparatus, comprising:
- a cleaning unit to clean a transfer medium;
- and
- a controller to determine whether a toner band to lubricate at least one of the cleaning unit and the transfer medium is applied and, if so, to control a level of optical power of an exposing unit to be lower than a level of the optical power of the exposing unit during forming of an image.
A method of operating an image forming apparatus, the method comprising:
- cleaning a transfer medium;
- and
- determining whether a toner band to lubricate at least one of a cleaning unit and the transfer medium is applied and, if so, controlling a level of optical power of an exposing unit to be lower than a level of the optical power of the exposing unit during forming of an image.
An image forming apparatus, comprising:
- a transfer medium;
- a cleaning unit having a cleaning position to clean the transfer medium;
- a toner band generator to generate a toner band to lubricate at least one of the cleaning unit and the transfer medium to prevent the cleaning unit from unintentionally being moved from the cleaning position due to friction between the cleaning unit and the transfer medium.
A method of operating an image forming apparatus, the method comprising:
- applying a cleaning unit to clean a transfer medium;
- and
- forming a toner band having a predetermined width and a length corresponding to a width of the transfer medium during a warm-up operation of the image forming apparatus to lubricate at least one of the cleaning unit and transfer medium.
Dependencies are inferred from the claim text.