JPH02213930A - Printing device - Google Patents

Abstract

PURPOSE:To decrease the transmission opportunity of print data and to reduce the load of a host device by storing continuously the print data received once from the host device even after the printing data is printed. CONSTITUTION:The subject device is provided with a reception means 9 to receive the printing data from a host computer 1, a memory means 10 which stores the printing data received by the means 9, a data processing means 9 which processes the printing data stored in the means 10, and a print means which prints the printing data received by the means 9 or the printing data stored in the means 10. Thus the printing data received once from the computer 1 is continuously stored even after the printing the data is printed. This stored data is processed as necessary and can be printed again. Thus it is possible to decrease the retransmission opportunity of the printing data and to reduce the load of the computer 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing device that receives and prints print data sent from a host device such as a host computer.

[Prior Art] Laser beam printers that receive print data from a host computer and perform printing are conventionally known.

In such a laser beam printer, if the data that has already been printed requires modification, the modification is performed on the host computer, and the modified print data is sent to the printer and printed again. It looks like this.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, all of the print data for a predetermined unit (one job) is transferred from the host computer to the printer every time correction is made, so only a small part of the print data is corrected. Even in this case, it is necessary to perform transfer operations for one job, which has the drawback of placing a large burden on the host computer.

An object of the present invention is to provide a printing device that can reprint print data without placing a burden on a host computer or the like that supplies the print data.

[Means for Solving the Problems] The present invention provides a receiving means for receiving print data sent from a host device, a storage means for storing the print data received by the receiving means, and a method for storing the print data stored in the storage means. The present invention is characterized by comprising a data processing means for processing the print data received by the receiving means, and a printing means for printing the print data received by the receiving means or the print data stored in the storage means.

[Function] In the present invention, the print data sent from the host device can be stored even after printing, and can be processed as appropriate and printed again, reducing the chances of resending the print data.1. The burden on the host device can be reduced.

〔Example〕

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

This printing device is a laser beam printer configured as a page printer, and receives print data transferred page by page from the host computer 1 via channel 2 and channel controller 3, and prints it using an electrophotographic method. be.

This printing device includes a CPU 9 that controls the entire device, a ROM 6 that stores control programs for the CPU 9 and various data, and a RAM 7 that stores data such as various flag information and calculation results processed by the CPU 9. ,
The RAM 7 has a disk 1O for storing print data transferred from the host computer 1, and an operation section 8 for inputting various inputs to the CPU 9. The RAM 7 stores specified file names input from the operation section 8. Buffer FB, flag MF that indicates the file change method, buffer BB that stores the specified block number
, buffers R and B for storing specified record numbers, and buffer NB for storing the number of deleted records.

This printing device also includes an input interface unit 5 for inputting the print data, and a data page buffer 1 for temporarily storing data output from the CPU 9 in units of pages.
2 (DB), and a character pattern generation unit 11 that converts the character code in this data page buffer 12 into a character pattern and outputs it to the output page buffer 13 (FB).
An output interface unit 14 generates a video signal from the dot information in the output page buffer 13, and an output device 15 receives the video signal and actually outputs an image.

FIG. 2 is a flowchart illustrating the operation of reprinting the print data received from the host computer 1 in the printing apparatus as described above.

First, data based on instructions from the operation unit 8 is stored in the buffer and flag areas in the ROM 7 (51-35), that is, the designated file name is stored in the buffer FB (Sl), and the flag Store the file change method in the MF area (32), where the flag M
The value of F and how to change the file are shown.

MF=1: Add data to the beginning of the file on the disk 10.

MF=2: Add data to the end of the file on the disk 10.

Mfl”=3: Add data after the specified block record of the file on the disk 10.

MF-4: File specification block on disk 10 +
Delete the record after 7 records and add data.

MF=5: The specified number of records after the specified block record of the file on the disk IO are deleted and no data is added.

By using the above five types of file modification methods, disk 10
Modify the above file.

Furthermore, the designated block number is stored in the buffer BB marked J (S4), the designated record number is stored in the buffer RB (S4), and the number of records to be deleted is stored in the buffer NB (35).

Next, based on the file name stored in buffer FB,
The file FB on the disk 10 is opened (SS), and the value of the flag MF is determined (S7, S8).

When the flag MF is 1, every time one record is received from the host computer 1 (S9), a tit merge is performed on the file FB on the disk 10 (S19), and when all the reception is completed, the file FB is closed (
SL, 0), open the changed file FB S
11) The data is called up and sequentially transferred page by page to the output device via the data page buffer 12, the output page buffer 13, and the output interface section 14.S12.520) The output device prints it out on recording paper. (S21).

The file FB is closed by cylinder-outing all the file FBs, and the process ends (S
13).

Further, in the above S8, if the flag MF is 2, after seeking to the end of the file FB on the disk 10 (318), the processes from S9 onwards are performed.

Also, in S7 above, flag MF is 3.4 or 5.
In this case, first seek the file FB on the disk lO to the RB record of the BB block (S
14) If flag MF is 4 or 5 (S 1
5) , delete the subsequent NB records 516), and if the flag MF is 4 (S17), perform the processing from S9 onwards, and conversely, if the flag MF is 5, perform the above S9
Perform the processing from 10 onwards.

Moreover, in the above S15, if the flag MF is 3,
The processing from S9 onwards is performed as is.

As described above, in this printing apparatus, when printing data that has been previously received from the host computer 1 is modified and desired to be printed again, the host computer 1 can also process almost the same data without having to resend it. can reduce the burden of

In the above embodiment, the method of changing the print data is to specify the location of the file data and delete it or receive new print data from the host computer 1 and add it. By providing a file data display section, a character data input section, and processing functions such as insertion and deletion, a configuration may be adopted in which more detailed modification processing is performed.

[Effects of the Invention j] According to the present invention, the print data sent from the host device can be stored even after printing, can be processed as appropriate and printed again, and there is no opportunity to resend the print data. 2, which has the effect of reducing the burden on the host device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a flowchart illustrating the operation of reprinting the print data received from the host computer 1 in the printing apparatus of the same embodiment. DESCRIPTION OF SYMBOLS 1... Host computer, 2... Channel, 3... Channel controller, 4... Printing device, 5... Input interface section, 6... ROM. 7."RAM, 8...Operation unit. 9...CPU. 10...Disk, 11...Character pattern generation unit, 12...Data page buffer. 13...Output page buffer 14... Output interface section, 15... Output device. Patent applicant: Canon Co., Ltd. Agent: Arata Yokubo Figure 1 Figure 2

Claims (1)

[Claims] Receiving means for receiving print data sent from a host device; Storage means for storing print data received by the receiving means; Processing the print data stored in the storage means. A printing device comprising: a data processing means for printing; and a printing means for printing print data received by the receiving means or print data stored in the storage means.