Abstract: In an image forming apparatus detachably connecting an imaging process unit including a non-volatile memory, information recorded in the non-volatile memory is partially encrypted.

Abstract: The advertisement managing device receives an advertisement request from an advertisement client terminal. The customer managing device specifies a copying machine adapted to the advertisement request, and advertisement contents requested to be advertised are transmitted to the specified copying machine. When the advertisement managing device receives an estimation request, an estimation result inclusive of the approximation of an advertisement charge is returned to the advertisement client terminal.

Abstract: The advertisement managing device receives an advertisement request from an advertisement client terminal. The customer managing device specifies a copying machine adapted to the advertisement request, and advertisement contents requested to be advertised are transmitted to the specified copying machine. When the advertisement managing device receives an estimation request, an estimation result inclusive of the approximation of an advertisement charge is returned to the advertisement client terminal.

Abstract: The advertisement managing device receives an advertisement request from an advertisement client terminal. The customer managing device specifies a copying machine adapted to the advertisement request, and advertisement contents requested to be advertised are transmitted to the specified copying machine. When the advertisement managing device receives an estimation request, an estimation result inclusive of the approximation of an advertisement charge is returned to the advertisement client terminal.

Abstract: In an image forming apparatus detachably connecting an imaging process unit including a non-volatile memory, information recorded in the non-volatile memory is partially encrypted.

Abstract: The advertisement managing device receives an advertisement request from an advertisement client terminal. The customer managing device specifies a copying machine adapted to the advertisement request, and advertisement contents requested to be advertised are transmitted to the specified copying machine. When the advertisement managing device receives an estimation request, an estimation result inclusive of the approximation of an advertisement charge is returned to the advertisement client terminal.

Abstract: A method for a charge control and multi-step deflection control type ink jet printer is disclosed which renders halftone by multi-step gradation. When an ink ejected from a nozzle is to be charged, a charging voltage is suitably varied to cause a shift in deflection by a pitch smaller than one dot pitch in the deflection direction, thereby selectively causing dots in the deflection direction to overlap and separate from each other. The pitch for developing the shift is variable to control the overlapping or separating degree of the dots in order to accomplish gradation in numerous densities.

Abstract: An image forming method for a color dot matrix printer prevents image quality from being deteriorated at the boundary between two nearby image areas which are developed by consecutive main scans. A paper is fed in a subscan direction by an amount which is one half of the width of a plurality of deflection steps, which is covered by one main scan, thereby developing an overlapping print area. The overlapping print area is subdivided at desired one of the deflection steps either column by column or color by color, an image segment in each of the resulting subregions being printed out by one of consecutive main scans.

Abstract: A control system for a charge deflection type ink jet printer which prints out one character line of print data by a plurality of strokes on a paper is disclosed. Data associated with odd scanning lines are printed out by one printing stroke of a carriage, then the paper is fed by a predetermined amount, and then data associated with even scanning lines are printed out. Thereafter, the paper is fed by an amount produced by subtracting a number of dots corresponding to a predetermined number of odd or even scanning lines from a number of dots corresponding to the total number of the odd and even scanning lines.

Abstract: A deflection control ink jet recording apparatus is capable of compensating for dislocation of dots at all the deflection steps. A deflection amount is adjusted with respect to two points to determine a correlationship between the amplification gain, charge code and deflection amount, so that an amplification gain and a charge code free from dislocation is set for each deflection step. A charge code compensation value is detected to add it to or subtract it from a predetermined charge code assigned to each deflection step, thereby setting a charge voltage code to be assigned to each deflection step in a printout operation.

Abstract: An ink jet head prints an image by superposing individual dot matrices of at least two colors. A computing unit receives electrical input signals representing the image and generates and feeds corresponding electrical signals representing the individual matrices of the at least two colors to the head means for printing. The computing means includes matrix generator means for generating the matrices in such a manner that the total number of dots to be printed in all of the matrices is limited to a first predetermined value which is less than the maximum possible total number of dots which can be printed in all of said individual dot matrices, and the total number of dots to be printed in the matrices which are formed by superposed dots of different colors is limited to a second predetermined value which is less than said first predetermined value.

Abstract: The present ink-jet printer produces ink droplets successively ejected toward a recording medium wherein those ink droplets to be used for printing are charged and deflected through an electric field to be deposited on the recording medium and those ink droplets not to be used for printing are usually not charged and collected in a gutter. However, the last ink droplet of a first series of ink droplets not to be used for printing is charged by a small amount when followed by a second series of ink droplets to be used for printing thereby preventing the first ink droplet of the second series from catching up with the last ink droplet of the first series.