Abstract: There is provided a printing apparatus, including: an obtaining portion and a printing portion. The obtaining portion obtains information regarding an image in which visibility is made to deteriorate on a sheet on which the image is printed. The printing portion overwrites an image having a printing surface pattern on the sheet by using an ink ribbon based on the obtained information.

Abstract: There is provided a printing apparatus, including: an obtaining portion and a printing portion. The obtaining portion obtains information regarding an image in which visibility is made to deteriorate on a sheet on which the image is printed. The printing portion overwrites an image having a printing surface pattern on the sheet by using an ink ribbon based on the obtained information.

Abstract: In accordance with an embodiment, an image forming apparatus comprises a deflector, a photoconductor, a mirror, a displacement mechanism and a control section. The deflector deflects laser light emitted from alight source to an optical path of each color in a horizontal scanning direction. The photoconductor is located in each optical path and forms an image of each color through development of an electrostatic latent image formed by being exposed by the laser light. The mirror is located in each optical path and reflects the laser light to each corresponding photoconductor. The displacement mechanism is arranged on each mirror and displaces the mirror in order to correct an inclination shift between images of respective colors. The control section corrects a magnification of the image of each color in the horizontal scanning direction according to an inclination correction amount of the image of each color.

Abstract: In accordance with an embodiment, an image forming apparatus comprises a deflector, a photoconductor, a mirror, a displacement mechanism and a control section. The deflector deflects laser light emitted from a light source to an optical path of each color in a horizontal scanning direction. The photoconductor is located in each optical path and forms an image of each color through development of an electrostatic latent image formed by being exposed by the laser light. The mirror is located in each optical path and reflects the laser light to each corresponding photoconductor. The displacement mechanism is arranged on each mirror and displaces the mirror in order to correct an inclination shift between images of respective colors. The control section corrects a magnification of the image of each color in the horizontal scanning direction according to an inclination correction amount of the image of each color.

Abstract: In accordance with an embodiment, an image forming apparatus comprises a deflector, a photoconductor, a mirror, a displacement mechanism and a control section. The deflector deflects laser light emitted from a light source to an optical path of each color in a horizontal scanning direction. The photoconductor is located in each optical path and forms an image of each color through development of an electrostatic latent image formed by being exposed by the laser light. The mirror is located in each optical path and reflects the laser light to each corresponding photoconductor. The displacement mechanism is arranged on each mirror and displaces the mirror in order to correct an inclination shift between images of respective colors. The control section corrects a magnification of the image of each color in the horizontal scanning direction according to an inclination correction amount of the image of each color.

Abstract: In accordance with an embodiment, an image forming apparatus comprises a deflector, a photoconductor, a mirror, a displacement mechanism and a control section. The deflector deflects laser light emitted from a light source to an optical path of each color in a horizontal scanning direction. The photoconductor is located in each optical path and forms an image of each color through development of an electrostatic latent image formed by being exposed by the laser light. The mirror is located in each optical path and reflects the laser light to each corresponding photoconductor. The displacement mechanism is arranged on each mirror and displaces the mirror in order to correct an inclination shift between images of respective colors. The control section corrects a magnification of the image of each color in the horizontal scanning direction according to an inclination correction amount of the image of each color.

Abstract: According to one embodiment, a printing apparatus includes a conveying unit, a printing unit, a display unit, and a control unit. The conveying unit conveys a sheet. The printing unit prints an image on the sheet conveyed by the conveying unit. The display unit performs display for causing a user to select necessity of re-printing on the sheet on which the image is printed. The control unit controls, if the necessity of the re-printing of the sheet is selected, the conveying unit to back-feed the sheet and controls the printing unit to perform re-printing after the back-feed of the sheet is completed.

Abstract: According to one embodiment, a printing apparatus includes a conveying unit, a printing unit, a display unit, and a control unit. The conveying unit conveys a sheet. The printing unit prints an image on the sheet conveyed by the conveying unit. The display unit performs display for causing a user to select necessity of re-printing on the sheet on which the image is printed. The control unit controls, if the necessity of the re-printing of the sheet is selected, the conveying unit to back-feed the sheet and controls the printing unit to perform re-printing after the back-feed of the sheet is completed.

Abstract: There is provided a printing apparatus, including: an obtaining portion and a printing portion. The obtaining portion obtains information regarding an image in which visibility is made to deteriorate on a sheet on which the image is printed. The printing portion overwrites an image having a printing surface pattern on the sheet by using an ink ribbon based on the obtained information.

Abstract: According to one embodiment, a printing apparatus includes a conveying unit, a printing unit, a display unit, and a control unit. The conveying unit conveys a sheet. The printing unit prints an image on the sheet conveyed by the conveying unit. The display unit performs display for causing a user to select necessity of re-printing on the sheet on which the image is printed. The control unit controls, if the necessity of the re-printing of the sheet is selected, the conveying unit to back-feed the sheet and controls the printing unit to perform re-printing after the back-feed of the sheet is completed.

Abstract: An image forming device includes a photoreceptor drum including a target surface that is scanned in a main scanning direction and a sub-scanning direction, an exposure head including a plurality of light emitting segments aligned in parallel to the main scanning direction, an exposure driving unit which selectively drives the plural light emitting segments, a storing unit which stores a profile where the respective positions of the plural light emitting segments correspond to a correction amount from the main scanning direction toward the sub-scanning direction at every position, and a correcting unit which smoothes a local change of the correction amount in the profile.

Abstract: An image forming device includes a photoreceptor drum including a target surface that is scanned in a main scanning direction and a sub-scanning direction, an exposure head including a plurality of light emitting segments aligned in parallel to the main scanning direction, an exposure driving unit which selectively drives the plural light emitting segments, a storing unit which stores a profile where the respective positions of the plural light emitting segments correspond to a correction amount from the main scanning direction toward the sub-scanning direction at every position, and a correcting unit which smoothes a local change of the correction amount in the profile.

Abstract: According to one embodiment, if it is designated by operation of a control panel that a printed halftone image for test is defective, a number of revolutions of a polygon mirror is finely adjusted by a predetermined rate and a frequency of a serial data signal is finely adjusted by the rate.

Abstract: An image forming apparatus includes a laser exposure device including plural laser oscillators, at least two pattern detection sensors to detect a pattern of forced light emission lines formed on a transfer belt by forced light emission of the plural laser oscillators at a time of initialization of the laser exposure device, and a shift amount calculation part to calculate a position shift amount between the forced light emission lines from output signals of the pattern detection sensors.

Abstract: According to one embodiment, if it is designated by operation of a control panel that a printed halftone image for test is defective, a number of revolutions of a polygon mirror is finely adjusted by a predetermined rate and a frequency of a serial data signal is finely adjusted by the rate.

Abstract: A test pattern image stored in advance is printed on a paper sheet. When the printed test pattern image is scanned by a scanning unit, a difference between the density of the scanned test pattern image and absolute density set in advance is detected. An exposure amount of a process unit is adjusted according to the detected density difference.

Abstract: A test pattern image stored in advance is printed on a paper sheet. When the printed test pattern image is scanned by a scanning unit, a difference between the density of the scanned test pattern image and absolute density set in advance is detected. An exposure amount of a process unit is adjusted according to the detected density difference.

Abstract: In an embodiment of the invention, a detection pattern in the form of a right-angled isosceles triangle is used, and the detection pattern is scanned with a laser beam before occurrence of change with time and a laser beam after occurrence of change with time. The quantity of color shift in a sub scanning direction due to change with time is measured on the basis of the difference in scanning length between when the detection pattern is scanned with the laser beam before occurrence of change with time and when the detection pattern is scanned with the laser beam after occurrence of change with time. In accordance with the measured quantity of color shift, the writing start line of a laser beam from a laser oscillator is shifted.