JPH05185701A - Printer - Google Patents

Abstract

PURPOSE:To make it possible to print at correct position at all times by a method wherein checking is performed as for the position of blank in addition to the checking of the absence or presence and size of the blank. CONSTITUTION:In the printer concerned, a blank position sensor 9, which detects the tip of blank and its left or right end, and a printing position correcting circuit 10, which sends the correction information of the deviation from the standard printing position calculated on the basis of the information sent from the blank position sensor 9 to an image data outputting section 5, is provided. Thus, the deviation of blank to the standard printing position is corrected, resulting in allowing to print at correct position at all times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer device which prints on paper which has been cut to a predetermined size.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing an example of a conventional printer device.

A conventional printer device (page printer device) that prints on paper (cut paper) that has been cut to a predetermined size in advance is a data input from the upper device 20, as shown in FIG. A receiving unit 12, a data analyzing unit 13 that analyzes the data received by the data receiving unit 12, a print image data generating unit 14 that generates print data based on the analysis result of the data analyzing unit 13, and a print image data generating unit. The image data output unit 15 for sending the image data generated by the unit 14 to the printing mechanism unit 18, and the printing mechanism unit 1.
8, a mechanism control unit 16 for controlling the operation, a paper sensor 17 for checking the presence / absence of a sheet for printing, and a size of the sheet for printing, and an image data output unit 15 that operates under the control of the mechanism control unit 16. A print mechanism unit 18 that prints input image data, a printer control unit 11 that controls the operations of the data receiving unit 12, the data analysis unit 13, the print image data generating unit 14, the image data output unit 15, and the mechanism control unit 16. Is equipped with.

In the page printer device thus constructed, the data analysis unit 13 analyzes the data received by the data reception unit 12, and the print image data generation unit 14 is based on the analysis.
In, it is expanded to bitmap data. When one page of data is completed by repeating this operation, the paper sensor 1
7, the presence / absence of paper is checked, and when there is paper, the mechanism control unit 16 activates the printing mechanism unit 18. After a lapse of a certain time from the activation of the print mechanism unit 18, the image data output unit 15 sends the image data expanded into bitmap data in the print image data generation unit 14 to the print mechanism unit 18, and the print mechanism unit 18 Print on paper.

[0005]

As described above, the conventional page printer apparatus checks the presence / absence of paper and the size of paper, but does not check the position of paper. The printing position is determined only from the position of the paper and the rotation time of the paper feed motor.

Therefore, there is a drawback in that the accuracy of the printing position is poor because an error occurs in the printing position due to the accuracy of the position where the paper is placed and the accuracy of the paper feeding. In particular, when printing on preprinted paper, OCR paper, or the like, there is a drawback that the print result may be printed at a position outside the frame.

[0007]

SUMMARY OF THE INVENTION A printer device of the present invention comprises a paper position sensor for detecting the position of the leading edge and the left edge or the right edge of a sheet at the start of printing, and a print reference position based on information from the sheet position sensor. From the print position correction circuit that calculates the deviation from the print position and sends the correction information to the image data output unit, and corrects the image data input from the print image data generation unit by the correction information input from the print position correction circuit. And an image data output unit for sending to the printing mechanism unit.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the embodiment of FIG.

In FIG. 1, the data receiving unit 2 inputs data from the host device 20. The data analysis unit 3 analyzes the data received by the data reception unit 2. The print image data generation unit 4 generates print data expanded into bitmap data based on the result analyzed by the data analysis unit 3.
The image data output unit 5 sends the image data generated by the print image data generation unit 4 to the printing mechanism unit 8. The mechanism control unit 6 controls the paper feeding operation by rotating the paper feeding motor of the printing mechanism unit 8. The paper sensor 7 is provided in the vicinity of the paper tray and checks the presence or absence of cut paper for printing and the size thereof. The printing mechanism unit 8 includes a paper feed motor and a printing unit, and the mechanism control unit 6
The image data input from the image data output unit 5 is printed by the control. The paper position sensor 9 has a plurality of light receiving units, and detects the timing when the paper passes and the deviation of the paper from the left and right reference positions. The print position correction circuit 10 generates print position correction information based on the information from the paper position sensor 9. The printer control unit 1 controls the operations of the data reception unit 2, the data analysis unit 3, the print image data generation unit 4, the image data output unit 5, and the mechanism control unit 6.

Next, the operation of the printer device configured as described above will be described with reference to FIG.

The data sent from the host device 20 is
The data is received by the data receiving unit 2. The data received by the data receiving unit 2 is analyzed by the data analyzing unit 3. When the analyzed data is the data to be printed, the data is sent to the print image data generation unit 4 and developed there into bitmap data of the print image image. Normally, the print image data generation unit 4 has a memory having a capacity of one page or more, and holds print data expanded into bitmap data in this memory until data for one page is prepared. The data receiving unit 2 and the data analyzing unit 3 also have a buffer memory and simultaneously process a plurality of data. When one page of data is stored in the memory of the print image data generation unit 4, the image data output unit 5 sends it to the printing mechanism unit 8 to print it.

In the printing operation of the printing mechanism unit 8, first, the paper sensor 7 checks whether or not there is a sheet, and if there is a sheet, the mechanism control unit 6 starts the printing mechanism unit 8
Rotate the paper feed motor to start the paper conveyance. When the paper reaches the position of the paper position sensor 9, the paper position sensor 9
Detects the leading edge of the paper (step 21 in FIG. 2). Then, the left edge or the right edge of the paper is detected (step 22) and the information is sent to the print position correction circuit 10. The print position correction circuit 10 calculates the deviation from the preset print reference position based on the input information (step 23) and sends the correction information to the image data output unit 5. The image data output unit 5 corrects the print data according to the information input from the print position correction circuit 10 and sends it to the print mechanism unit 8. The printing mechanism unit 8 waits for a certain period of time from the start (step 24), and prints one dot line at a time when the leading edge of the paper reaches a predetermined position. When the paper is in the proper position, white data (non-printing data) is output for the number of dots specified in advance (step 2
After 5), print data is output (step 26). When the paper position sensor 9 detects the deviation of the paper, the number of white data (non-printing data) is adjusted according to the magnitude of the deviation to perform the correction.

[0014]

As described above, the printer device of the present invention calculates the deviation from the printing reference position based on the information from the paper position sensor that detects the leading edge of the paper and the left or right edge of the paper and the information from the paper position sensor. By providing a print position correction circuit for sending the correction information to the image data output unit, it is possible to correct the deviation of the paper with respect to the print reference position and always print at the correct position. .

[Brief description of drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment of FIG.

FIG. 3 is a block diagram showing an example of a conventional printer device.

[Explanation of symbols]

 1 Printer Control Section 2 Data Reception Section 3 Data Analysis Section 4 Print Image Data Generation Section 5 Image Data Output Section 6 Mechanism Control Section 7 Paper Sensor 8 Printing Mechanism Section 9 Paper Position Sensor 10 Printing Position Correction Circuit 11 Printer Control Section 12 Data Reception Unit 13 data analysis unit 14 print image data generation unit 15 image data output unit 16 mechanism control unit 17 paper sensor 18 printing mechanism unit 20 upper device 21 to 26 steps

Claims (2)

[Claims] 1. A paper position sensor that detects the position of the leading edge and the position of the left edge or the right edge of a sheet at the start of printing, and the deviation from the print reference position is calculated based on the information from the sheet position sensor, and the correction information is imaged. A printer device, comprising: a print position correction circuit for sending to a data output unit. 2. A sheet position sensor that detects the position of the leading edge and the position of the left edge or the right edge of the sheet at the start of printing, and the deviation from the print reference position is calculated based on the information from the sheet position sensor, and the correction information is imaged. A print position correction circuit for sending to a data output unit, and an image data output unit for correcting the image data input from the print image data generation unit by the correction information input from the print position correction circuit and sending it to the printing mechanism unit. A printer device comprising: