Copy quality monitoring for magnetic images
AssigneeXerox Corporation
InventorsJohn F. Knapp, Robert J. Gruber, Steven B. Bolte
Life of this patent
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Abstract
An electrophotographic printing machine in which a magnetic toner image is transferred to a copy sheet from a photoconductive member and fused thereto. The toner image fused to the copy sheet is magnetized and the intensity of the magnetic field generated by the toner image detected to provide a continuous indication of the quality of the toner image fused to the copy sheet.
Claims12
An electrophotographic printing machine of the type in which a magnetic toner image is transferred to a copy sheet from a photoconductive member and fused thereto, including:
- means for magnetizing the toner image fused to the copy sheet;
- and
- means for detecting the intensity of the magnetic field generated by the toner image fused to the copy sheet with the magnetic field intensity being proportional to the ratio of the mass of toner particles to area of toner particles on the copy sheet.
An apparatus for monitoring the quality of a magnetic toner image fused to a copy sheet, including:
- mean for magnetizing the toner image fused to the copy sheet;
- and
- means for detecting the intensity of the magnetic field generated by the toner image fused to the copy sheet with the magnetic field intensity being proportional to the ratio of the mass of toner particles to the area of toner particles on the copy sheet.
Dependencies are inferred from the claim text.