JPH0564942A - Printing device - Google Patents

Abstract

PURPOSE:To provide a printing device wherein, when printing is restarted after a temporary interruption of operation caused by abnormality during printing, omissions of printing are not produced. CONSTITUTION:When a printing stop signal is outputted from a printing mechanism 6 during the operation of a printing device 1, the character data stored at the address out of the character data stored in a buffer memory 5 and the character data which have been stored following the storage of said character data in the buffer memory 5 are read out in the order of storage thereof, wherein a printing monitor 7 is provided to deliver the character data having been read out to a device of higher rank. When a printing stop signal is outputted from the printing mechanism 6 during the printing operation and the printing operation is stopped, character data which have not been printed are sent to the device of higher rank by the action of the monitor 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing device, and more particularly to a printing device for printing character data sent from a host device such as an information processing device at a predetermined position on a paper surface.

[0002]

2. Description of the Related Art A conventional printer 10 has a buffer memory 50 for temporarily storing input character data and a buffer memory 50 read from the buffer memory 50, as shown in the block diagram of FIG. The printing mechanism unit 6 that prints character data on a predetermined sheet, and the printing mechanism unit 6 and the buffer memory 50 are controlled so that the characters corresponding to the character data stored in the buffer memory 50 described above are printed. It is composed of a print control unit 4 for controlling the print mechanism unit 6 for printing on the upper side.

When character data is input from a host device (not shown) such as an information processing device, the buffer memory 5
This character data is temporarily stored in 0, and the print control unit 4
Controls the printing mechanism unit 6 and the buffer memory 50 to read the character data stored in the buffer memory 50,
A character corresponding to the read character data is controlled by the print control unit 4 by the control signal output from the print control unit 4 to print the character at a predetermined position on a predetermined sheet.

When characters are printed on a predetermined sheet by the printing device 10 as described above, the sheet is printed by the printing mechanism section 6.
When the sheet is fed by the printer and the sheet is not positioned at the predetermined printing position, or when the operator of the printing device 10 is performing a printing operation, the lid of a case (not shown), which is a part constituting the printing device 10, is placed. When opened, or when the paper jams in the printer during printing,
A detector (not shown) provided in advance in the printing mechanism section 6 for detecting an abnormality detects this abnormality, generates a print stop signal, and outputs it to the print control section 4. Upon receiving the print stop signal, the print control unit 4 stops the print operation by the print mechanism unit 6. When the cause of this abnormality is removed, the output of the print stop signal is stopped, and the print operation is restarted.

[0005]

In the above-mentioned conventional printing apparatus, is the unprinted character data stored in the buffer memory stored as it is when the above-mentioned abnormality, that is, the printing failure occurs? Alternatively, since it is uncertain whether or not the character data will disappear when an abnormality occurs, it is unclear as to how much character data is printed out of the character data output to the printing device 10 when viewed from the host device. Therefore, as described above, when the printing device 10 becomes normal after the abnormality occurs and the printing operation is restarted, it is not known from which character data the printing data should be sent to the printing device 10. However, there is a disadvantage that double printing is performed.

An object of the present invention is to detect, when the printing mechanism section 6 generates and outputs the above-mentioned printing stop signal, a character data portion which has not been printed yet and which is stored in the buffer memory and remains. By providing a print monitoring unit that sends out the remaining unprinted data, the host device that received the character data sent from this print monitoring unit
It is an object of the present invention to provide a printing device which makes it possible to know the first character data to be sent when the operation of the printing device is restarted.

[0007]

According to the printer of the present invention, character data output from a higher-level device such as an information processing device is temporarily stored in a buffer memory and is read from the buffer memory under the control of a print controller. When a character according to character data is printed on a sheet placed at a predetermined position by a printing mechanism section controlled by the printing control section and the printing mechanism does not exist at a predetermined position on the sheet during printing, or other In a printing device in which the printing mechanism section detects that an abnormal state has occurred due to the following, sends a printing stop signal to the printing control section to stop the printing operation, When the address of the buffer memory where the character data to be printed is stored is always detected and the print stop signal is output, A print monitoring unit is provided that reads out the character data after the first character of the unprinted character data on the fixed paper from the buffer memory in the order stored in the buffer memory and sends the read character data to the host device. Is configured.

[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 printing apparatus of the present invention.

As shown in FIG. 1, the printing apparatus 1 of the present embodiment, in addition to the same printing mechanism section 6 and printing control section 4 as the printing apparatus 10 already described with reference to FIG. Character data that has been received and temporarily stored, is output to the printing mechanism unit 6 in the order in which the character data designated by the control signal from the print control unit 4 is stored, and when the print output signal is received, the character that is not printed and is stored inside The buffer memory 5 that outputs the data to the host device in the order in which the data is stored, and the print mechanism unit 6 should perform the next printing by reading from the buffer memory 5 for printing under the control of the print control unit 4 during the printing operation. The address of the buffer memory 5 in which the character data is stored is always detected, and when the above-mentioned print stop signal is received, it should be printed after the character data detected at that time. Buffer memory as described above the non-printing data all are composed of print monitoring unit 7 for outputting the higher-level apparatus read above from the buffer memory in the order in which they were stored.

Therefore, when the above-mentioned printing apparatus 1 becomes abnormal and the printing mechanism section 6 detects this abnormality and the printing apparatus 1 stops the printing operation, the printing monitoring section 7 operates and is stored in the buffer memory 5. Since all the character data that has not been printed and remains is sent to the upper device connected to this printer, the upper device prints from which character data when the printer 1 is in the normal state and printing is restarted. It is possible to know whether to restart the transmission of the character data to the device 1.

[0012]

As described above, the printing apparatus of the present invention includes the print monitoring unit 7 for monitoring the address of the character data in the buffer memory 5 to be printed next by the print monitoring unit 7 by the print monitoring unit 7. When the printing mechanism restarts printing, the host device outputs unprinted character data to the host device based on the above-mentioned address when the print stop signal is output from the printing mechanism. It is possible to determine from which character data the transmission of the character data should be restarted, and it is possible to prevent double printing and print omission when printing based on the character data on a predetermined paper by the printing device. Have an effect.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing an example of a conventional printing apparatus of this type.

[Explanation of symbols]

 1 printing device 4 printing control unit 5 buffer memory 6 printing mechanism unit 7 printing monitoring unit

Claims (1)

[Claims] 1. Character data output from a higher-level device such as an information processing device is temporarily stored in a buffer memory, and a character according to the character data read from the buffer memory under the control of the print controller is read by the print controller. The printing mechanism controlled by means of printing on a paper placed in a predetermined position, and the fact that the printing mechanism is not in the predetermined position of the paper during printing or that an abnormal state is caused by other factors is described above. In a printing device that detects a printing mechanism section and sends a printing stop signal to the printing control section to stop the printing operation,
When the address of the buffer memory in which the character data to be printed next is stored during the printing operation controlled by the print control unit is constantly detected and the print stop signal is output, the predetermined value is output from the buffer memory. A print monitoring unit that reads out character data after the first character of the unprinted character data on the paper from the buffer memory in the order stored in the buffer memory and sends the read character data to the host device. Characteristic printing device.