Abstract: The sheet conveying apparatus includes a conveying belt including a placement area having a suction hole, and configured to convey a sheet with a vacuum force from the suction hole, a sheet supply unit capable of supplying a sheet to a supply position of the sheet with respect to the conveying belt; and a control unit configured to control the conveying belt so as to further move the conveying belt after the conveying belt conveys a last sheet to be conveyed. The control unit causes the conveying belt to wait after moving the placement area to a predetermined position in an area from a position in an upstream direction with respect to the moving direction of the conveying belt to the supply position in a conveying amount of the conveying belt corresponding to a time required for the sheet supply unit to convey a next first sheet to the supply position.

Abstract: The sheet conveying apparatus includes a conveying belt including a placement area having a suction hole, and configured to convey a sheet while being sucked by the suction hole; a sheet supply unit capable of supplying a sheet to a supply position of the sheet with respect to the conveying belt; and a control unit configured to control the conveying belt so as to further move the conveying belt after the conveying belt conveys a last sheet to be conveyed, and cause the conveying belt to wait after moving the placement area to a predetermined position in an area from a position in an upstream direction with respect to the moving direction of the conveying belt to the supply position in a conveying amount of the conveying belt corresponding to a time required for the sheet supply unit to convey a next first sheet to the supply position.

Abstract: An inkjet image forming device records a test pattern 901 composed of plural lines running along the nozzle array, at least one end positions of the lines being shifted in increments of one unit amount, using a first line recording head 202. After that, the same test pattern as the test pattern described above is sequentially recorded using the second and the subsequent line recording heads, 203-205. The lines of each recorded test pattern are detected by an optical sensor 210 provided downstream of the plural line recording heads. Based on the detection results of the lines of the test patterns recorded by the line recording heads, the amounts of nozzle array direction registration errors between the line recording head, which is one of the plural line recording heads and is used as the base, and other line recording heads are detected. Based on the amounts of errors, the registration of the line recording heads is corrected.

Abstract: An inkjet recording device having a line type recording head detects the conveyance speed of a recording medium (S401) and changes the conveyance-direction recording resolution of the recording head and the driving control method of the recording head according to the detected conveyance speed (S403-S413). The change of this driving control method is that the pulse width of a driving pulse applied to the recording elements of the recording head is changed based on coefficients determined according to the detected conveyance speed or that the divided driving interval used for divided driving control is changed. Changing the driving control method in this way allows the user to print at a desired conveyance speed with no concern for various print settings.

Abstract: A barcode generation system that generates an appropriate barcode, which satisfies the usage condition of each user, quickly and with a minimum consumption of ink and paper. A test chart is printed on a printing device 200 based on a test chart image 706 provided for printing black bars and white bars of a barcode wherein each of the black bars and white bars has the width of one of a plurality of different numbers of dots, and the output test chart 704 is read by an image scanner 110. An information processing device 100 analyzes the image, which has been read, and generates a relation table 800. In addition, based on information on a barcode type and a narrow bar width, the information processing device 100 calculates, by referring to the relation table 800, the correction values (barcode correction values 707) for the widths of the bar elements constituting the barcode.