Image forming apparatus and method for reducing image banding of the image forming apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsSoo Yong Kim, Sang Bum Woo, Chang Yong Sung, Jae Il Yu
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Abstract
An image forming apparatus and a method of reducing image banding of the image forming apparatus is provided. The image forming apparatus includes: a photoconductor unit on which an electrostatic latent image is formed; and a conveying unit configured to convey printing medium at a first conveying velocity toward the photoconductor unit, and configured to convey the printing medium at a second conveying velocity that is lower than the first conveying velocity when the printing medium approaches the photoconductor unit.
Claims18
An image forming apparatus comprising:
- a photoconductor unit including a photoconductor drum on which an electrostatic latent image is formed;
- a transfer unit including a transfer roller to transfer the electrostatic latent image formed on the photoconductor unit to a printing medium, wherein a nip is formed between the photoconductor drum and the transfer roller;
- a controller to:
- determine an arbitrary point as an acceleration start point, wherein a distance between the arbitrary point and the nip is less than a radius of the photoconductor drum, and
- determine a deceleration start point that is farther from the nip than the determined acceleration start point based on the determined acceleration start point;
- and
- a conveying unit including at least one conveying roller that:
- conveys the printing medium at a first conveying velocity toward the determined deceleration start point,
- conveys the printing medium at a second conveying velocity that is lower than the first conveying velocity from the determined deceleration start point toward the determined acceleration start point, and
- conveys the printing medium at a third conveying velocity that is different from the second conveying velocity from the determined acceleration start point toward the nip.
A method of reducing image banding of an image forming apparatus, comprising:
- determining an arbitrary point as the acceleration start point, wherein a distance between the arbitrary point and a nip formed between a photoconductive drum of a photoconductor unit and a transfer roller of a transfer unit is less than a radius of the photoconductor drum;
- determining a deceleration start point that is farther from the formed nip than the determined acceleration start point based on the determined acceleration start point;
- conveying a printing medium toward the determined deceleration start point, at a first conveying velocity;
- conveying the printing medium at a second conveying velocity that is lower than the first conveying velocity from the determined deceleration start point toward the determined acceleration start point;
- conveying the printing medium at a third conveying velocity that is different from the second conveying velocity from the determined acceleration start point toward the nip;
- and
- entering the printing medium into the nip at the third conveying velocity.
Dependencies are inferred from the claim text.