JPS609913B2 - How to cut continuous paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting continuous paper used in printing devices and the like, and particularly to a new paper cutting method that is effective when applied to non-impact printers equipped with a fixing section.

2. Description of the Related Art Printing devices are generally used as output devices for electronic computers, and impact printers and non-impact printers are known as printing devices. However, it is also well known that a paper processing device for cutting, folding, etc. paper is coupled to this printing device. Incidentally, in this type of printer, continuous paper with perforations is used, and it is desirable that the paper be cut on a job-by-job basis and processed without waste.

For example, in the case of an impact printer, a paper cutting section is provided within one sheet of continuous paper from the printing position, so that the paper can be cut even during up to four jobs (one sheet). However, with non-impact printers, developing,
Since fixing is required as a post-processing for printing by transfer, it is not possible to arrange a paper cutting section near the printing position for reasons such as disturbing the printed content on the paper surface. Therefore, it is common to provide the cutting layer at a position several sheets away from the printing position. In view of the above-mentioned conventional situation, this invention has developed a new method that allows cutting into the minimum number of sheets even when the paper cutting unit is placed at a distance equivalent to several sheets of continuous paper from the printing quality. The present invention aims to provide a method for cutting continuous paper.

Briefly stated, the present invention provides a paper processing device in which a paper cutting section is arranged at a distance equivalent to several sheets of continuous paper from a printing position, and in which a paper cutting command associated with each of a series of jobs is individually issued. The paper cutting commands are sequentially stored in the storage means, and each time the paper cutting position corresponds to the paper cutting section, the stored paper cutting commands are successively stored from the previous storage means to sequentially execute predetermined paper cutting. It is characterized by the following. Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a diagram showing an overview of a general laser printer to which the present invention is applied and a paper processing device attached thereto, in which 1 is continuous paper, 2 is a paper hopper, 3 is a photosensitive drum, 4 is a transfer unit, and 5 is a paper processing device attached thereto. A fixing section, 6 a paper cutting section, and 7 a paper stacker.

Note that, although not limited thereto, in the case shown in the figure, the transfer section 4 and the paper cutting section 6 are arranged at a distance equivalent to three sheets of continuous paper. Therefore, in this embodiment, the paper is cut after the paper has been fed for three sheets after the cutting command is issued. FIG. 2 is a block diagram illustrating a specific example of the present invention that allows such a cutting operation to be processed without any trouble even for a plurality of consecutive cutting commands, and in the case of the figure, four consecutive cutting commands are processed. It is shown as something that can be dealt with.

This paper cutting control unit has four storage means 11 to 1.
4, memory selection means 15, OR gate 16, and AND gate 17. Storage means 11
-14 have a function of individually temporarily storing cutting commands CS for each job, and reading out the stored command CS2 by inputting, for example, three feed signal pulses PS for each sheet. In the example, it is configured by counters. Further, the memory selection means 15 is for selectively inputting the cutting command CS into the memory means 11 to 14, and is formed using, for example, a ring counter. Then, the AND gate officer 7 performs an AND operation between the storage command CS2 that has passed through the OR gate 16 and the paper feed stop signal FS from a print control section (not shown), and generates an effective cutting command CS3. be. Next, the cutting operation of the above structure will be explained with reference to FIG. 3, which schematically shows the printed content and the position to be cut.

In FIG. 3, CP to CP3 indicate three cutting positions of the paper 1, and in this case, three cutting operations are required according to three jobs. First, in response to the first disconnection command,
The ring counter 15 counts the number "1", and thereby selects the first counter 1 and executes the corresponding instruction CS,
Enter. As a result of this step 3, the counter 11 clears the count up to that point to "0", and sequentially inputs the sheet feed signal PS to sequentially advance to "1", "2", . . . . When the count value of "3" is shown, the storage command CS2 is outputted and inputted to the AND gate 17 via the OR gate 16. Therefore, when the AND gate 17 receives the paper feed stop signal FS from the print control section, it executes the effective cutting command C according to the relationship with the storage command.
S3 will be output. Thus, this disconnection command C
If S3 is input to the paper cutting section 6 shown in the first figure, the predetermined first cutting position CP will be cut. Following this, the second cutting command increments the ring counter 15 to a count value of "2".

As a result, the second counter 12 is selected and the cutting command is input, so that the counter 12 clears the counting contents as described above and also outputs the sheet feed signal PS.
will be sequentially advanced. In addition, during the period of this stepping operation, that is, when the count value is "2", the following 3
The third disconnection command has been issued, and by incrementing the ring counter 15, this command is temporarily stored in the third counter 13 in the same manner as described above. Therefore, even if the third command occurs before the cutting operation based on the second cutting command is executed, there is no possibility that the cutting operation will be hindered. Thereafter, the cutting operations based on the respective cutting commands are sequentially performed in the manner described above. As is clear from the above description, the present invention is, in short, a paper processing apparatus in which a paper cutting section is arranged at a distance equivalent to several sheets of continuous paper from a printing position, in which a The cutting commands are sequentially stored in separate storage means, and each time the position of the paper to be cut corresponds to the paper cutting section, the stored paper cutting commands are sequentially output from the storage means to cut the predetermined paper. This feature is characterized in that the cutting is performed sequentially, and even in the case of the smallest job, the paper can be cut in a predetermined manner, eliminating waste and being extremely useful in improving economic efficiency.

In particular, its practical effects are extremely great when applied to non-impact printers having a fixing section. It goes without saying that the essence of the invention is not limited to the above-described embodiments.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an overview of a non-impact printer and a paper processing device to which this invention is applied, Fig. 2 is a block diagram of an example for realizing this invention, and Fig. 3 explains the operation of this invention. This is a diagram for 1: Continuous paper, 2: Paper hopper, 3: Photosensitive drum, 4:
Transfer section, 5: Fixing section, 6: Paper cutting section, 7: Paper stacker, 11 to 14: Storage means, 15: Memory selection means, 16
: or gate, 17: and gate. Traditional Figure 2 Traditional Figure 3

Claims (1)

[Claims] 1. In a paper processing device in which a paper cutting unit is arranged at a distance corresponding to several sheets of continuous paper from a printing position, paper cutting commands associated with each of a series of jobs are sequentially stored in separate storage means. The method is characterized in that the paper cutting commands stored in the storage means are sequentially outputted each time the position of the paper to be cut corresponds to the paper cutting section, and predetermined paper cutting is sequentially executed. How to cut continuous paper.