Image forming apparatus, imposition method for booklet-shaped prints, and booklet-shaped prints

An image forming apparatus comprising:

• an image output section which folds at a folding line, binding a plurality of sheets, both sides of each of which have been printed, and outputting a booklet-shaped print;
• and
• a controller provided with a processing unit and a memory, the controller comprising:
• a shifting section which shifts drawing information to be printed on each page of at least one set of spread two pages other than central pages of the booklet-shaped print so that the drawing information is separated from a bound position;
• and
• a synthesizing section which synthesizes the drawing information near a bound side of one page of the two pages, information based on the drawing information, or predetermined background information, in a blank portion formed by a shift on a bound side of an other page of the two pages,
• wherein, when a number of pages of the plurality of sheets is a predetermined value or larger,
• the shifting section shifts the drawing information on each page of at least one set of spread two pages of the booklet-shaped print so that the drawing information is separated from the bound position;
• and
• the synthesizing section synthesizes drawing information near the bound side of one page of the two pages, information based on the drawing information, or predetermined background information, in a blank portion formed by a shift on a bound side of an other page of the two pages, and
• when the number of pages of the plurality of sheets is less than the predetermined value, the shifting section does not perform the shifting and the synthesizing section does not perform the synthesizing.

An imposition method for a booklet-shaped print in an image forming apparatus binding a plurality of sheets, both sides of each of which have been printed, and outputting the booklet-shaped print, the imposition method comprising:

• shifting drawing information to be printed on each page of at least one set of spread two pages of the booklet-shaped print so that drawing information is separated from a bound position;
• and
• synthesizing the drawing information near a bound side of one page of the two pages, information based on the drawing information, or predetermined background information, in a blank portion formed by a shift on a bound side of an other page of the two pages,
• wherein, when a number of pages of the plurality of sheets is a predetermined value or larger, the method executes the steps of shifting and synthesizing, and when the number of pages of the plurality of sheets is less than the predetermined value, the method does not execute the steps of shifting and synthesizing.

An imposition method for a booklet-shaped print in an image forming apparatus folding at a folding line, binding a plurality of sheets, both sides of each of which have been printed, and outputting the booklet-shaped print, the imposition method comprising:

• shifting drawing information to be printed on each page of at least one set of spread two pages other than central pages of the booklet-shaped print so that the drawing information is separated from a bound position;
• and
• synthesizing the drawing information near a bound side of one page of the two pages, information based on the drawing information, or predetermined background information, in a blank portion formed by a shift on the bound side of an other page of the two pages,
• wherein, when a number of pages of the plurality of sheets is a predetermined value or larger, the method executes the steps of shifting and synthesizing, and when the number of pages of the plurality of sheets is less than the predetermined value, the method does not execute the steps of shifting and synthesizing.