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Class Information
Number: 399/138
Name: Electrophotography > Image formation > Operator adjusted density
Description: Subject matter wherein a means or method is provided for an operator to select or adjust the relative lightness or darkness of a reproduced image.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8554094 Image forming apparatus and image quality control method Oct. 8, 2013
8467101 Image forming apparatus for adjusting dot size Jun. 18, 2013
8223385 Printer job visualization Jul. 17, 2012
8179568 Minimizing dot graininess in dot-on-dot printing devices May. 15, 2012
8175483 Image forming apparatus and gradation correction test chart May. 8, 2012
7187884 Graphical representation of setting values of printing image and machine parameters for an electrophotographic printer or copier Mar. 6, 2007
6668142 Image forming apparatus with reference density changed according to low frequent and high frequent modes Dec. 23, 2003
6650849 Method of and apparatus for controlling image density of toner image based on high and low-density correlation data Nov. 18, 2003
6559876 Image forming apparatus with exposure reduction mode May. 6, 2003
6512562 Protective film for polarizing plate Jan. 28, 2003
6377766 Electrophotographic apparatus having a printing density controller for dropout and non-dropout color Apr. 23, 2002
6112041 Image forming apparatus with density adjustment Aug. 29, 2000
5999175 User interface for selecting scanner sensitivity Dec. 7, 1999
5974278 Image formation apparatus Oct. 26, 1999
5799231 Variable index distributed mirror Aug. 25, 1998
5797066 Light source drive controlling device for use in image forming apparatus Aug. 18, 1998
5754919 Electrostatic recording apparatus utilizing superimposition of colors in a toner image to record a multicolor image May. 19, 1998
5745819 Reproduction machine having image deletions reducing control system and method Apr. 28, 1998
5745255 Electrophotographic digital printer having data expansion means responsive to desired image quality and type of recording medium used Apr. 28, 1998
5722005 Image forming apparatus with control of charging, exposure and development according to image density steps Feb. 24, 1998
5668635 Facsimile system operable in toner save mode, depending upon type of original image data Sep. 16, 1997
5661564 Facsimile system operable in toner save mode, depending upon importance of original image Aug. 26, 1997
5655185 Image forming apparatus and method Aug. 5, 1997
5392097 Image processing apparatus Feb. 21, 1995
5355200 Printer with print density switching means Oct. 11, 1994
5335047 Printing plate making apparatus for two different kinds of masters Aug. 2, 1994
5331379 Image forming apparatus capable of changing the surface potential of a photosensitive member Jul. 19, 1994
5317373 Method and apparatus for user customized colorants in an electrophotographic printing machine May. 31, 1994
5287149 Image forming apparatus having image transfer electrode contactable to transfer material Feb. 15, 1994
5249018 Electrophotographic image forming apparatus with user-adjustable forming condition default Sep. 28, 1993
5146269 Image forming apparatus having self-diagnostic function Sep. 8, 1992
5140363 Image projector Aug. 18, 1992
5111235 Method of operating electrophotographic printing apparatus May. 5, 1992
5055877 Copying apparatus with moveable screen and method Oct. 8, 1991
5030994 Electrophotographic apparatus with multiple speed mode Jul. 9, 1991
5021312 Apparatus and method for controlling the quantity of developer delivered to a film processing head Jun. 4, 1991
5019873 Color tone adjustable image recording apparatus May. 28, 1991
5010372 Black-and-white and color copier operable at different processing speeds Apr. 23, 1991
4990953 Copying apparatus Feb. 5, 1991
4967211 Printing machine with toner density balance in solid areas and line strokes Oct. 30, 1990
4959687 Bias power source controller for an image forming apparatus Sep. 25, 1990
4943834 Image forming apparatus capable of detecting, analyzing and displaying an originals spectroscopic color data Jul. 24, 1990
4912513 Developing apparatus with variable developing bias voltage Mar. 27, 1990
4879579 Image recording apparatus Nov. 7, 1989
4853738 Color quality improvements for electrophotographic copiers and printers Aug. 1, 1989
4821068 Image forming apparatus Apr. 11, 1989
4785330 Multiple image forming system Nov. 15, 1988
4772919 Electrophotographic copying machine Sep. 20, 1988
4745489 Image recording apparatus for recording only the image area of a film May. 17, 1988
4740814 Preview system for an electrophotographic printing machine Apr. 26, 1988

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