JP2654015B2 - Document processing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document processing apparatus, and more particularly, to a document processing apparatus that converts input document information into pattern information and outputs the pattern information.

[Conventional technology]

2. Description of the Related Art Conventionally, a dot type double-sided recording apparatus such as a laser beam printer which records pattern information on both sides of a sheet by a sheet reversing mechanism has been proposed. A conventional document processing apparatus that outputs pattern information to a recording apparatus of this type stores input document information in a buffer memory in page units, and then converts the input document information into pattern information by an image pattern generator (character generator). I was

[Problems to be solved by the invention]

However, such a conventional character processing apparatus outputs an error notification when the buffer memory is full of document information and interrupts the subsequent processing.

Therefore, when the error notification is generated and no intervention is performed by the operator (operator), there is a problem that the subsequent data processing does not proceed.

An object of the present invention is to provide a document processing apparatus capable of avoiding interruption of data processing even when document information overflows, in view of such a conventional problem.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a document processing apparatus which converts input document information into pattern information and outputs the pattern information to a double-sided printing system having a recording medium reversing mechanism. Storage means, the first storage means for storing the document information of the front page read out from the storage means, and the third storage for storing the document information of the back page read out from the first storage means Means,
When the second storage means is full, the third storage means is provided with a document editing means for creating a blank page.

[Action]

According to the present invention, when the front page memory is full during the front page document editing process, a blank back page is automatically created and output to the duplex recording apparatus. However, even if an overflow occurs, interruption of data processing can be avoided and processing can be continued.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a basic configuration of an embodiment of the present invention. In the figure, a is a data source for outputting document information, and B is a document editing means for editing the document information from the data source a in page units. The document editing means b inputs the document information from the data source a and stores it in the first storage means c, and then stores the document information of the front page read out from the first storage means c in the second storage means d And the document information of the back page read out from the first storage means c is stored in the third storage means e, and the document information is converted into pattern information by the pattern generation means f. Output to a double-sided recording system g having an inversion mechanism. Further, when the second storage means d is full, the document editing means b creates a blank page in the third storage means e, converts the document information into pattern information, and outputs it to the double-sided recording system g. .

FIG. 2 shows a circuit configuration of an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a data source such as a host computer which outputs document information (print information) in a character code. This character code includes graphic characters (graphic characters) and functional characters (control characters). Graphic characters are characters (alphabetic characters, kana, kanji), numbers and symbol characters (space characters, special characters) that can be recorded on a printing device. And the function character includes a transmission control character, a format control character, a device control character, an information separation character, and a special control character for designating start, change, and stop of the control function.

Reference numeral 2 denotes a document processing apparatus including components 3 to 13, which inputs the above-described document information from the data source 1, performs predetermined document editing processing in page units, and converts the document information into dot-patterned character pattern information. The data is converted and output to a dot-type double-sided recording device (double-sided printer) 14 described later. 3 is an input buffer (memory) for inputting and storing document information from the data source 1 and 4 is a control means as shown in FIGS. 3 and 4 previously stored in an internal ROM (read only memory) 5. CPU for controlling the entire apparatus according to the present invention
(Central processing unit), 6 is an internal RAM (random access memory) used as a work area of the CPU 4. Required data and the like are stored in the ROM 5 in advance in addition to the control means (program).

Reference numeral 7 denotes a control code register for analyzing a control command (control character) in the document information. Reference numeral 8 previously stores dot pattern information corresponding to graphic characters (graphic characters) such as characters and symbols recordable by the recording device 14. Image pattern generator (character generator).
Reference numeral 9 denotes a first page buffer (page buffer 1) dedicated to a table page for storing one page of document information of an odd page (table page), and stores the document information of the table page read from the input buffer 3 by the CPU 4. Store. Reference numeral 10 denotes a first page memory (page memory 1) dedicated to a front page for storing pattern information obtained by converting the document information of the first page buffer 9 into an image pattern by the generator 8 for one page as an output image. Reference numeral 11 denotes a second page buffer (page buffer 2) dedicated to a back page for storing one page of document information of an even page (back page), and stores the document information of the back page read from the input buffer 3 by the CPU 4. Store.
Reference numeral 12 denotes a second page memory (page memory 2) dedicated to a back page for storing one page of output image information obtained by converting the document information of the second page buffer 11 by the image pattern generator 8.

Reference numeral 13 denotes a two-sided printer such as a laser beam printer which outputs the output data (pattern information) of the image memories 10 and 12 described above.
This is a printer interface unit for outputting to 14. The double-sided printer 13 has a dot-type double-sided recording function for actually outputting pattern information on the front and back of a sheet based on output data from the printer interface unit 13, and has a sheet reversing mechanism for that. This paper reversing mechanism is a well-known technology,
Detailed description is omitted.

FIG. 3 shows the overall control operation of the CPU 4 of FIG.
The figure shows the details of the page buffer write processing of FIG. Next, an operation example of the embodiment of the present invention will be described with reference to the flowcharts of FIGS.

First, step according to the output start signal from the data source 1.
In S20, the document information from the data source 1 is stored in the input buffer 3. Thereafter, when the output end signal is received from the data source 1 and all the document information is stored in the input buffer 1, the process proceeds to step S21, where the input buffer 3 is input in word units.
The document information in is read out sequentially. Next, in step S22, it is determined whether or not the read character is a control command. In the case of a negative determination, the process proceeds to a process of writing to a page buffer in step S23 described later. In the next step S24, an analysis of what control instruction is performed is performed with reference to the control code register 7.

As a result of the analysis, if the control instruction is a page break instruction, the process proceeds from step S25 to step S26, closes the page buffer 9 or 11 currently written, and proceeds to the next step.
In S27-1, it is determined whether or not the closed page buffer is the page buffer 11 for the back side. If the determination is affirmative, the document information in the first and second page buffers 9, 11 is transferred to the image pattern generator 8. And converts the pattern information into corresponding image memories 10 and 12, and outputs the pattern information from the image memories 10 and 12 to the printer 14 through the printer interface unit 13. After the printout is performed, the process proceeds to step S29. If it is determined in step S27-1 that the front page buffer 9 has been closed, the process proceeds to step S27-1.
Proceed to S29.

If it is determined in step S25 that the control command is not a page break command, the process proceeds from step S25 to step S28, where processing such as line feed and tab movement corresponding to the command is performed, and the process proceeds to step S29.

In step S29, it is determined whether or not all the document information (data) in the input buffer 3 has been read out. If the determination is negative, the process returns to step S21 to repeat the above processing.

On the other hand, when the document information read from the input buffer 3 is not a control command, it is a graphic character such as a pseudonym or a number, and a negative determination is made in step S22. , 11 graphic character writing processing, and the flow advances to step S29.

When the data reading from the input buffer 3 is completed, an affirmative determination is made in step S29, so the process proceeds to step S30, where the page buffers 9, 11 are closed, and the contents of the page buffers 9, 11 are read by referring to the image pattern generator 8. After being converted into pattern information and expanded in the corresponding image memories 10 and 12, respectively, the pattern information of the output image read from the image memories 10 and 12 is output to the printer 14 and printed out on the front and back of the paper. Then, the present process ends. If data reading is completed during writing of the front page, the back side is output as a blank page.

Next, the flowchart of FIG. 4 will be described. First, in step S32, it is determined whether a front page (odd page) or a back page (even page) is currently being created by referring to a flag set in the internal RAM 6, and a front page is created. If so, the process proceeds to step S33. In step S33, it is determined from the value of the internal counter whether or not the page buffer 9 dedicated to the front page is full (overflow). The document information (character code) input at S21 and read from the buffer 3 is written into the page buffer 9 together with the print position information counted by the CPU 4, and the process returns to the main routine and proceeds to step S29 in FIG.

When the page buffer 9 dedicated to the front page is full, step S33 is affirmative, so the process proceeds to step S35 to close the page buffer 9 (close), and then the page buffer 11 dedicated to the back page in step S36. Is created on a blank page by writing a blank (space),
In step S37, the contents of both page buffers 9, 11 are converted into pattern information using the image pattern generator 8, and are developed in the corresponding image memories 10, 12. Subsequently, in step S38, the pattern information of the image memories 10 and 12 is output to the double-sided printer 14 having the sheet reversing mechanism through the printer interface unit 13, and the printer 14 records the contents of the first image memory 10 on the surface of the sheet. Then, the contents of the second image memory 12 are recorded on the back side of the sheet. Therefore, in this case, information is recorded only on the front side of the sheet, and the back side is blank. Thereafter, the process returns to the main routine, and the steps shown in FIG.
Proceeding to S29, and returning from step S29 to step S21 to continue the processing, the information of the overflowed portion without interruption is started to be written from the first page buffer 9 dedicated to the front page.

On the other hand, if it is determined in step S32 that the back page has been created, the process proceeds to step S39, where it is determined from the value of the internal counter whether the page buffer 11 dedicated to the back page has been filled, and it is still full. If not, the document information (character code) read out from the input buffer 3 in step S21 is written into the page buffer 11 together with the print position information counted by the CPU 4, and the process returns to the main routine and proceeds to step S29 in FIG. move on.

If it is determined in step S39 that the page buffer 11 is full, the flow advances to step S41 to close the page buffer 11 for the back page, and in the next step S42, the contents of both page buffers 9, 11 are subjected to image pattern generation. The image data is converted into pattern information by using the image memory 10,
Expand to Subsequently, in step S43, the image memory 10,
The 12 pattern information is output to the duplex printer 14 through the printer interface unit 13 and the contents of the image memories 10 and 12 are recorded on the front and back sides of the sheet by the printer 14, and thereafter, the process returns to the main routine from step S29 in FIG. Returning to step S21, the above processing is continued. Therefore, in this case as well, the processing is continued without interruption, and the information of the overflowed portion on the back surface is written from the first page buffer 9 for the front surface.

In the above embodiment, for simplicity of explanation, each of the page buffers 9, 11 and the image memories 10, 12 is assumed to have a storage capacity of one page. May be stored, and the front and back surfaces of a plurality of pages may be printed at a time.

In this embodiment, if the front page page buffer 9 becomes full during the front page creation, a blank back page is automatically created, but before the back page creation, the page buffer 9 becomes full. To the host computer of the data source 1 and output a blank back page.
The operator may be able to select and instruct whether to write the remaining data as back page data into the back page page buffer 11 or skip the remaining data. In this case as well, when there is no intervention of the operator's selection instruction for a predetermined time, the interruption of the processing can be avoided by automatically outputting the document data on the blank back page.

〔The invention's effect〕

As described above, according to the present invention, when the front page memory is full during the front page document editing process, a blank back page is automatically created and output to the duplex recording apparatus. Therefore, even if the document information overflows into the memory, the data processing can be prevented from being interrupted, and the processing can be continued.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of the embodiment of the present invention, FIG. 2 is a block diagram showing a circuit configuration of the embodiment of the present invention, FIG. 3 is a flowchart showing an operation example of the embodiment of FIG. FIG. 4 is a flowchart showing details of the page buffer reading process of FIG. 1. Data source, 2. Document processing device, 3. Input buffer, 4. CPU, 5. ROM, 6. RAM, 7. Control code register, 8. Image pattern generator, 9. ... Page buffer (for front side), 10 ... Image memory (for front side) 11 ... Page buffer (for back side), 12 ... Image memory (for back side), 13 ... Printer interface, 14 ... dot Double-sided recording device (for example, a laser beam printer).

Claims (2)

(57) [Claims] A) a document processing apparatus for converting input document information into pattern information and outputting the pattern information to a double-sided recording system having a recording medium reversing mechanism; b) a first apparatus for inputting and storing the document information Storage means; c) second storage means for storing the document information of the front page portion read from the first storage means; and d) storing document information of the back page portion read from the first storage means. And e) document editing means for creating a blank page in the third storage means when the second storage means is full. apparatus. 2. The apparatus according to claim 1, wherein said document editing means, when said second storage means is full, outputs the overflowing document information to said second storage means after outputting said blank page. A document processing apparatus characterized by storing in a storage means and outputting it as a front page.