JPS6211366A - Digital copying device - Google Patents

Abstract

PURPOSE:To efficiently execute a long-size copy in a facsimile-cum-copying device etc. of an ordinary paper recording type that uses cut paper, by repeating transfer until picture signals stored in a memory becomes the number of lines corresponding to the length of recording paper or the end of an original is detected. CONSTITUTION:When starting of copying is instructed by a key switch 5, a DMA transfer plug for DMA transferring to a page memory 6 is set to a direct memory access DMA controller 4 and a reading start signal that makes a reading device 2 start reading is outputted. On receiving the reading start signal, the device 2 feeds an original for one line by a step motor, and at the same time, outputs read picture signals for one line to a series parallel SP converting circuit 3. The picture signals SP converted by the circuit 3 are transferred to a memory 6 by the controller 4. Transfer of the signals is repeated until picture signals stored in the memory 6 reaches the number of lines corresponding to the length of recording paper or the end of the original is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION U) Industrial Field of Application This invention relates to digital copying devices, and more particularly to plain paper recording type facsimile and copying devices using cut paper.

(b) Conventional technology Recently, plain paper recording type facsimile machines have been put into practical use that incorporate electrophotographic PPC (plain paper copier) technology in the printing section for the purpose of high-speed, high-definition recording. Such a facsimile device is disclosed, for example, in the article ``Ultra-high-speed facsimile device'' on pages 197 to 206 of Telecommunication Research Institute Research and Practical Application Report Vol. 66, No. 11 (1984).

By the way, the facsimile machine mentioned above is not close to that of a copying machine in both image quality and speed.If you pay attention to the copying speed and resolution, the medium speed of PPC with a resolution of 16 lines/11A4 size and 15 to 60 sheets/min. comparable to a machine. Therefore, this facsimile device can be used as a digital copying device.

&) Problems to be Solved by the Invention There are cases in which a copying machine that uses cut sheets of recording paper cut to a predetermined size is used to copy the entire document of a so-called "long document" that exceeds the predetermined size. be. When copying this long document, it must be recorded on multiple sheets of recording paper.

In order to divide a long document into multiple sheets in this way, it is necessary to divide the long document into multiple sheets when scanning the document, and then scan and record each divided document. This is fine, but the copying process is troublesome when using the praying method.

It is also conceivable to record on a plurality of sheets of recording paper and then paste the recording sheets together. At this time, if the sheets are not pasted together carefully, some copy data may be missing.

(b) Means for resolving the interpolation point The present invention provides a reading means for reading and receiving an original conveyed by a drive whA and outputting an electrical signal, and a signal read by the reading means is stored. a storage means for recording based on the image signal stored in the storage means; a storage state detection means for detecting that the memory state of the storage means has been stored up to a predetermined area; The apparatus includes a transfer means for transferring a stored image signal between the two specified storage areas, and a stop means for stopping the reading operation of the reading ab means in response to the output of the detection means.

(e) Operation When copying a long document, the first recording is to read and record image data corresponding to the recording paper length. To record the second and subsequent images, first, the last end of the image signal stored in the storage means is transferred to the leading end of the storage means, and new image data is read and stored following the forward end of the transfer arrow. When the memory state in the storage means is stored up to a predetermined area, reading and previous storage are stopped, and recording is performed based on the image signal in the storage means. In this way, when copying a long document, an overlapping portion with the immediately previous recording is automatically provided, and the document is divided and recorded onto a plurality of sheets of recording paper.

(f) Embodiment FIG. 1 is a block diagram of a digital copying apparatus according to an embodiment of the invention. The copying apparatus includes a system control section (1). The system control section (1) is constructed of a microcomputer and performs the previous work shown in FIG. 6, which will be described later.

A reading device (2) serving as a reading means is connected to the system control unit (1), optically reads and scans the original to be copied line by line, and photoelectrically converts the results using a CCD or the like to generate a binary image signal. Output.

This binarized signal is led to a serial-to-parallel conversion circuit (hereinafter referred to as an SP conversion circuit) (3).

Key switch (5) connected to system control unit (1)
derives the copy setting, copy start signal 8, etc.

DMA (direct memory) acts as a transfer means.
Access] Controller (4) is a system control unit (1
), the image signal from the reading device (2) '! The image signal written in the page memory (6) is transferred via DMA to the page memory (6) as a storage means via the 1-5P conversion circuit (3), and the image signal is transferred from parallel to serial. -PQ Calligraphy H Collection-) (7
) and the recording device (9) via the interface (8).
). The page memory (6) has a capacity to store at least an image (i! number) equivalent to one page of a manuscript.

The recording device (9) includes a printing unit using an electrophotographic method, an electrostatic recording method, a thermal recording method, or the like, and records a copy image based on an input image signal.

FIG. 2 shows a case where the page memory (6) is addressed in units of image signal lines, and in this embodiment, the Qt%an line corresponds to the recording paper length.

Next, the specific operation of this embodiment will be explained with reference to the flow diagram of FIG. 6, focusing on the operation of the system control section.

When the start of copying is instructed by the key switch (5), in step S1, a DMA controller (4) is used to transfer the DMA to the page memo (January 6).
Set the transfer plug and proceed to step S2.

In step S2, a reading start signal for starting reading is output to the reading device (2), and the process proceeds to step S6. In step S5, a DMA start signal for starting DMA transfer is output to the DMA controller (4), and the process proceeds to step S4. Upon receiving the reading start signal, the reading device (2) uses a step motor to feed the document by 12 inches, and outputs the read image signal for one line to the SP conversion circuit (3)K. The image signal subjected to serial/parallel conversion by the SP conversion circuit (3) is transferred to the page memory (61) by the DMA controller (4).

In step S4, it is determined whether a predetermined number of lines have been read. That is, as shown in FIG. 2, the image signal stored in the page memo I is a line corresponding to the recording paper length. It is determined whether or not the process has been completed up to jc(n+1). If the process has not been completed, the process proceeds to step S5, and if it has been completed, the process proceeds to step S6.

In step S5, it is determined whether reading has been completed to the end of the document. If the end of the document is detected, the process advances to step S6, and if the end of the document is not detected, the process returns to step S2.

In this way, the fin attack (n+1
) or until the end of the document is detected.

In step S6, a DMA transfer flag for DMA transfer of the signal from the page memory (6) to the recording device (9) is set for the DMA controller (4),
Proceed to step S7. In step S7, the recording device (9
) to start recording, and the process proceeds to step S8. In step S8, DM
A DMA start signal for starting DMA transfer is output to the A controller (4), and the process advances to step S9. In this way, the image signal for one line is
), it becomes a serial signal through the PS conversion circuit (7), enters the recording bag IIf (91) from the interface (8), and is recorded.Then, in step S9, it is determined whether or not recording has been completed up to the reading end line. That is, in this embodiment, the process waits until the recording of n lines shown in FIG.

When the recording of n lines is completed, the process advances to step S10, and in step S10, it is checked whether or not the edge of the document has been recorded.
J cut off. In step 510, when it is detected that the recording up to the level of exhaustion is detected, the process proceeds to step S11, and step 5
At step 11, the original is ejected and the operation ends.

In the case of a long document, since the edge of the document has not been detected at the time when the first and second recording is completed, the process advances to step S12 and performs the operation for recording the second document.

That is, in step 512, the page memory (6
), a DMA transfer flag for transferring the end portion of the image data to the leading end is set, and in step S16, a DMA transfer start number a is output, the DMA transfer is started, and the DMA transfer is ended in step 514. Wait until

When the DMA transfer in the page memo (January 6) is completed, the process advances to step 515 and starts reading and storing again → Tom. Furthermore, the end and leading edge of the image data are as shown in Figure 2.
The m-n line corresponds to the o-line, and the data of the m-n line is transferred to the o-k line. +1 to the transfer data width is determined by experiment.

Steps 815 to 519 for reading and storing the second and subsequent sheets perform operations similar to steps 81 to S5, and store di fg 9 in the page memory (6).

Since the operations for the second and subsequent sheets, that is, steps 515 to S19, are substantially the same as the operations for the first sheet, steps 81 to S5, a brief explanation will be given focusing on the differences. After the start of reading, the #1 line is written at address 0 on the first sheet, but it is written at address +1 on the second and subsequent sheets. Also, each time one line is read, it is checked whether or not the end of the line has been read (step 519), and if the end of the line is not detected, the data is continued and stored up to address n in Figure 2. Thereafter, medical records are performed in step S6, and the above-described operations are repeated until the end of the document is detected.

It is confirmed that the edge of the document has been read (step 51).
9), the process returns to step S6, where recording is immediately started, recording is performed up to the edge of the document, and the copying operation for a long document is completed.

The above-mentioned embodiments mainly focus on the case of long manuscripts (#9)
The image signals are sequentially transferred to and recorded, and the copying is completed.

In addition, when copying a plurality of copies, the image signal written in the page memory (6) is configured to be recorded by the recording device (9) for a predetermined number of copies, and then reading and storing are resumed.

When set in the reading jl This also prevents missing copy data and facilitates the work of pasting together copies.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the embodiment of Kazuo Kimoto, Fig. 2 is a schematic diagram showing the storage state of the page memory as a storage means, and Fig. 6 is a rounded flow diagram explaining the operation of the system control unit. It is. (1)...System system@Miyako, (2)...Reading device, (4)...DMA controller, (6)...Page memory, (9)...Recording device. Sanyo'4 Bond Co., Ltd.

Claims (1)

[Claims] (1) A reading means that reads and scans the document conveyed by the drive system and outputs an electrical image signal, a storage means that stores the image signal read by this reading means, and an image signal that is stored in this storage means. recording means for recording based on the image signal stored in the storage means; storage state detection means for detecting that the storage state of the storage means has been stored up to a predetermined area; the image signal stored in the storage means after the output of the detection means; and stop means for stopping the reading operation of the reading means in response to the output of the detection means. A digital copying apparatus, wherein a recording means records a predetermined amount of image data, and after recording a predetermined amount, the transfer means transfers an image signal between the storage areas, and the reading means restarts the reading operation.