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US 10,197,951 B2Granted
Image forming apparatus, image forming system and recording medium
AssigneeKonica Minolta, Inc.
InventorsShota Sakurai, Hiroshi Morimoto, Wataru Watanabe, Kazuteru Ishizuka, Tatsuya Furuta
Life of this patent
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Abstract
An image forming apparatus includes: a conveyance section configured to convey a sheet in a direction opposite to a first conveyance direction during image formation, the direction being a second conveyance direction; and a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip.
Claims19
An image forming apparatus comprising:
- a conveyance section configured to convey a sheet in a direction opposite to a first conveyance direction during image formation, the direction being a second conveyance direction;
- and
- a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip;
- wherein the distortion correction section humidifies the sheet to thereby correct distortion of the sheet;
- the distortion correction section comprises a pair of humidification rollers configured to humidify the sheet, and
- the distortion correction section causes the pair of humidification rollers to be in pressure-contact with the sheet when the sheet is conveyed in the second conveyance direction and distortion occurs in the sheet, and the distortion correction section causes the pair of humidification rollers to separate from each other when the sheet is conveyed in the second conveyance direction and no distortion occurs in the sheet.
3 more elements
An image forming system composed of a plurality of units including an image forming apparatus, the image forming system comprising:
- a conveyance section configured to convey a sheet in a direction opposite to a first conveyance direction during image formation, the direction being a second conveyance direction;
- and
- a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip;
- wherein the distortion correction section humidifies the sheet to thereby correct distortion of the sheet;
- the distortion correction section comprises a pair of humidification rollers configured to humidify the sheet, and
- the distortion correction section causes the pair of humidification rollers to be in pressure-contact with the sheet when the sheet is conveyed in the second conveyance direction and distortion occurs in the sheet, and the distortion correction section causes the pair of humidification rollers to separate from each other when the sheet is conveyed in the second conveyance direction and no distortion occurs in the sheet.
3 more elements
A computer-readable recording medium storing therein a program for causing a computer of an image forming apparatus to execute processing comprising:
- conveying a sheet in a direction opposite to a first conveyance direction during image formation, the direction being a second conveyance direction;
- and
- correcting, on an upstream side of a transfer nip in the first conveyance direction when the sheet is conveyed in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip;
- wherein the program causes the computer of the image forming apparatus to execute processing further comprising humidifying the sheet to thereby correct distortion of the sheet;
- the image forming apparatus comprises a pair of humidification rollers configured to humidify the sheet, and
- the program causes the computer of the image forming apparatus to execute processing further comprising causing the pair of humidification rollers to be in pressure-contact with the sheet when the sheet is conveyed in the second conveyance direction and distortion occurs in the sheet, and causing the pair of humidification rollers to separate from each other when the sheet is conveyed in the second conveyance direction and no distortion occurs in the sheet.
3 more elements
Au image forming apparatus comprising:
- a conveyance section wherein the conveyance section is configured to convey a sheet in a conveyance path section in a direction opposite to a first conveyance direction in the conveyance path section during image formation, the direction being a second conveyance direction;
- and
- a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip;
- wherein the distortion correction section humidifies the sheet to thereby correct distortion of the sheet;
- the distortion correction section comprises a pair of humidification rollers configured to humidify the sheet, and
- the distortion correction section causes the pair of humidification rollers to be in pressure-contact with the sheet when the sheet is conveyed in the second conveyance direction and distortion occurs in the sheet, and the distortion correction section causes the pair of humidification rollers to separate from each other when the sheet is conveyed in the second conveyance direction and no distortion occurs in the sheet.
3 more elements
An image forming system composed of a plurality of units including an image forming apparatus, the image forming system comprising:
- a conveyance section wherein the conveyance section is configured to convey a sheet in a conveyance path section in a direction opposite to a first conveyance direction in the conveyance path section during image formation, the direction being a second conveyance direction;
- and
- a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip;
- wherein the distortion correction section humidifies the sheet to thereby correct distortion of the sheet;
- the distortion correction section comprises a pair of humidification rollers configured to humidify the sheet, and
- the distortion correction section causes the pair of humidification rollers to be in pressure-contact with the sheet when the sheet is conveyed in the second conveyance direction and distortion occurs in the sheet, and the distortion correction section causes the pair of humidification rollers to separate from each other when the sheet is conveyed in the second conveyance direction and no distortion occurs in the sheet.
3 more elements
A computer-readable recording medium storing therein a program for causing a computer of an image forming apparatus to execute processing comprising:
- conveying a sheet in a conveyance path section in a direction opposite to a first conveyance direction in the conveyance path section during image formation, the direction being a second conveyance direction;
- and
- correcting, on an upstream side of a transfer nip in the first conveyance direction when the sheet is conveyed in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip;
- wherein the program causes the computer of the image forming apparatus to execute processing further comprising humidifying the sheet to thereby correct distortion of the sheet;
- the image forming apparatus comprises a pair of humidification rollers configured to humidify the sheet, and
- the program causes the computer of the image forming apparatus to execute processing further comprising causing the pair of humidification rollers to be in pressure-contact with the sheet when the sheet is conveyed in the second conveyance direction and distortion occurs in the sheet, and causing the pair of humidification rollers to separate from each other when the sheet is conveyed in the second conveyance direction and no distortion occurs in the sheet.
3 more elements
Dependencies are inferred from the claim text.