JPH07108718A - Printer with print omission preventing function - Google Patents

Abstract

PURPOSE:To flexibly print without considering a sheet size by preventing omission of printing when print data larger than a sheet width is received from a host apparatus. CONSTITUTION:This printer comprises a sheet width setter 2 for inputting sheet width information, a sheet width register 3 for storing the sheet width information, a print controller 5 for controlling print data to be fed from a host apparatus 9, and a lithographic memory 6 for storing the print data. The printer further comprises a printing width register 4 for detecting a printing width of the data stored in the memory 6 by the controller 5 and storing the width, a comparator 7 for outputting a comparison result of a value of the register 3 with that of the register 4 to the controller 5, and a print data rotating unit 8 for judging whether the data stored in the memory 6 is rotated at 90 deg. in response to the result or not to print it on a sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing device having a print defect prevention function, and more particularly to a printing device having a print defect prevention function when print data larger than a paper width is received from a host device.

[0002]

2. Description of the Related Art Referring to FIG. 3, which shows a block diagram of a first example of a conventional printing apparatus, a printing control unit 11 for controlling print data input from a higher-level apparatus 9 is provided in the printing apparatus 10.
A drawing memory 12 for converting print data into a printable form and storing the same in accordance with a command from the print control unit 11; And part 13. When print data is input from the higher-level device 9, the print control unit 11 converts the print data into a printable form and stores it in the drawing memory 12. The print data stored in the drawing memory 12 is printed by the print unit 1 according to a command from the print control unit 11.
3, and the printing unit 13 prints on paper and outputs it.

Further, in the second example of the conventional printing apparatus disclosed in Japanese Patent Laid-Open No. 62-80081, before printing one page, the print data amount of the page is compared with the paper size in use. Then, the result is displayed on a display unit, and the operator is prompted to replace the paper to prevent the print data from being lost or protruding.

[0004]

The first example of the conventional printing apparatus prints the print data stored in the drawing memory regardless of the paper width, and therefore, when the print width is larger than the paper width, as shown in FIG. As shown in (a), the characters on the right side of the paper (G and H in this case) are missing.

Further, in the second example of the conventional printing apparatus, it takes time and effort to replace the paper.

[0006]

A printing apparatus having a print defect prevention function of the present invention comprises a paper width setting means for inputting paper width information, a paper width storage means for storing the paper width information, and a host device. Print control means for controlling the print data sent, drawing storage means for storing the print data, print width of the print data stored in the drawing storage means by the print control means, and the print width is detected. A print width storage means for storing a width, a comparison means for outputting a comparison result of the values of the paper width storage means and the print width storage means to the print control means, and a drawing storage means in accordance with the comparison result. Print data rotation means for determining whether or not to rotate the stored print data by 90 ° and printing the print data on a sheet.

Further, the printing apparatus having the print defect prevention function of the present invention is characterized in that the paper width setting means comprises an externally operable setting switch for inputting paper width information.

Further, the printing apparatus having the print defect prevention function of the present invention is characterized in that the paper width setting means comprises sensors horizontally arranged at both ends of the paper running portion.

Further, the printing apparatus having the print defect prevention function of the present invention is characterized in that the paper width information is inputted from the host apparatus.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. Referring to FIG. 1, which is a block diagram showing an embodiment of the present invention, a printing apparatus 1 of this embodiment includes a paper width setting unit 2 for inputting paper width information, and a paper width register 3 for storing the paper width information. The print control unit 5 that controls the print data sent from the higher-level device 9, the drawing memory 6 that stores this print data, and the print width of the print data that is stored in the drawing memory 6 by the print control unit 5 A print width register 4 that detects and stores the print width, a comparison circuit 7 that outputs the comparison result of the values of the paper width register 3 and the print width register 4 to the print control unit 5, and a drawing memory according to the comparison result. The print data rotating unit 8 determines whether or not the print data stored in 6 is rotated by 90 ° and prints the print data on a sheet.

FIG. 2 is a diagram showing the positional relationship between the paper running and the printed characters. The operation of this embodiment will be described with reference to FIG. 2 together with FIG. Before starting the printing operation, the maximum print width in the print direction of the paper to be printed is input to the paper width register 3 using the paper width setting unit 2 in advance. Then, when the printing operation is started, print data is stored in the drawing memory 6 from the higher-level device 9 through the print control unit 5. The print width register 4 detects the print width of the print data stored in the drawing memory 6 and holds the value of the print width. Next, the comparison circuit 7 compares the maximum print width held in the paper width register 3 with the print width of the print data held in the print width register 4, and if the maximum print width of the paper is as shown in FIG. When the print width of the actual print data is larger than the width, the comparison circuit 7 outputs a message to that effect to the print control unit 5.
Then, the print control unit 5 issues a command to the print data rotating unit 8, and the print data rotating unit 8 rotates the print data stored in the drawing memory 6 by 90 ° and prints it on the paper as shown in FIG. 2B. Output.

The paper width setting unit 2 of this embodiment can be constituted by a setting switch that can be operated from the outside or a sensor horizontally arranged at both ends of the paper running unit. Further, the paper width information can be directly input to the paper width register 3 from the host device.

[0013]

As described above, according to the present invention,
Print defects can be prevented by rotating the print data by 90 ° and printing on the paper according to the comparison result of the values of the paper width and the print width.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a positional relationship between paper running and printed characters.

FIG. 3 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1 Printing Device 2 Paper Width Setting Section 3 Paper Width Register 4 Print Width Register 5 Print Control Section 6 Drawing Memory 7 Comparison Circuit 8 Print Data Rotating Section 9 Upper Device

Claims (4)

[Claims] 1. A paper width setting means for inputting paper width information, a paper width storage means for storing this paper width information, a print control means for controlling print data sent from a host device, and this print data. And a print width storage means for detecting the print width of the print data stored in the draw storage means by the print control means and storing the print width, the paper width storage means and the print width storage means. Comparison means for outputting the result of comparison with the print width storage means to the print control means, and whether or not to rotate the print data stored in the drawing storage means by 90 ° according to the comparison result And a print data rotating unit for printing on a sheet of paper. 2. The printing apparatus having a print defect prevention function according to claim 1, wherein the paper width setting means comprises an externally operable setting switch for inputting paper width information. 3. A printing apparatus having a print defect prevention function according to claim 1, wherein the paper width setting means is composed of sensors horizontally arranged at both ends of the paper running unit. 4. The printing apparatus having a print defect prevention function according to claim 1, wherein the paper width information is input from the upper apparatus.