JPS5821725Y2 - Automatic marking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that can mark media of various lengths at desired positions.

When printing on paper with a certain length, such as a bank passbook, print a reading mark on one end of the paper in advance, and check whether or not there is an entry in a field such as the date field that is always displayed next to the mark. By doing this, the desired position is determined.

This means that it cannot be used when the length is undefined or the writing format is inconsistent.

In addition, when filing a copy after making a copy, it is generally desired to know the center position of the paper, but since the size of the paper is undefined, conventional copiers cannot print the center position mark, making handling inconvenient.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and to provide an apparatus that is capable of applying a predetermined mark at a desired position even on media of different lengths with a relatively simple configuration.

Embodiments of the present invention shown in the drawings will be described below.

FIG. 1 shows a schematic diagram of the present invention applied to a copying machine.

A well-known CPY is used in the copying section.

Arrow A indicates the location and direction in which the paper PP as a moving medium is inserted, and arrow B indicates the location and direction in which the paper bearing the mark of the copying invention is discharged.

H1 and H1 indicate photodetectors, in which a light emitting element and a light receiving element are opposed to each other, and the passage of the medium is detected by blocking the light emitted from the light emitting element.

PR indicates a mark printing mechanism section controlled by the detection output of the photodetector H2.

Processing becomes easier when the center positions of the printing mechanism unit PR and the detection device H2 are on the same line perpendicular to the paper moving direction.

R1 and R2 are part of the medium moving rollers, both have the same diameter and the same rotation speed, and are provided immediately before each of the photodetectors H1 and Hl.

R3 and R4 are also moving rollers, which are used to change the moving direction of the paper PP, and have an appropriate size.

A light sensing device is therefore provided along the path along which the paper PP travels, thereby detecting the length of the medium.

That is, if the radius of roller R1 is r (m) and the number of rotations is n times/second, then the paper feed speed S is S = 2πr-n (m7
seconds)・−・・−・(1)

Letting ti (seconds) be the time during which the light-receiving element of the photodetector H1 is shielded from light due to the passage of the paper, the length L of the paper is given by L-5-tl (m) (2) .

Therefore, when printing a mark at, for example, the center position in the length direction of the paper, the rear light detection device H2 detects the position corresponding to the length L/2 from the leading edge of the paper, and the printing mechanism PR
All you have to do is make it work.

Measure the length from the leading edge of the paper using the photodetector H2,
Considering the delay time of 12 seconds for driving the printing mechanism, H
The time T from the time when the medium reaches the position directly below 2 until the printing mechanism is driven is equal to:

Therefore, by measuring time, it is sufficient to convert it into length.

Next, FIG. 2 shows an example of a specific apparatus for converting time measurements into lengths for H1 and H2PR shown in FIG. 1.

In FIG. 2, CPU is a central control unit including a clock pulse oscillator, CTC is a counter that counts pulses for time measurement, MEM is a device that stores the output of the counter CTC,
BS is a bus line that connects the central control unit and other devices, MSC is a printing mechanism control circuit, OPC is an operation panel control circuit, and B is an operation panel.

FIG. 3 shows a time chart for explaining the operation of FIG. 2.

Figure 3 A clock pulse is a pulse transmitted from the central control unit CPU, Figure 3 B count gate ■ shows the state of the first gate provided in the pulse input circuit of the pulse counter CTC, and the knob for starting the copying operation is shown. When operated on panel B, it opens.

When the paper to be copied reaches the photodetector H1, a detection pulse waveform shown in FIG. 3C rises.

With this waveform, the currant game) IN 2 shown in the third diagram.
The gate) opens immediately and the panels are counted as shown in Figure 3E.

When the light detection device H1 detects the passage of paper, the count gate II is closed, the count value of the counter CTC is stopped at n, and the count value is temporarily stored in the storage device MEM.

The count gate I is closed, and then the value n stored in the storage device MEM is calculated in the central control unit CPU, and a clock pulse value corresponding to the value of T is stored in the storage device MEM as described later.

After the memorization is completed, open the currant game (FIG. 3F) and wait.

After the normal copying operation is completed in the copier CPY, when the paper moves and is detected by the photodetector H2, a pulse rises as shown in Fig. 3 G and the count gate IV is opened (Fig. 3 H)
, then count the clock pulses again as shown in Figure 3,
When the counted value becomes equal to a certain value stored in the storage device MEM, the printer PR is driven.

The counting of the counter CTC is stopped and then reset.

Assuming that the period of the lock pulse is tc (seconds), the number N1 of clock pulses for the time t1 in equation 2) is calculated as follows: N1=t1/lc...(5) Delay time t2 in equation (3) The number of clock pulses for
2 is N2= t 2/jc (6) Therefore (
4) (5) From equation (6), the number of pulses N corresponding to the time T is given, and since N2 is a constant, the value of N can be easily calculated by counting N1, and is therefore stored in the storage device MEM. It is also easy to do so.

When the next sheet of paper is inserted, the light detecting device H1°H1 operates in the same way and marks can be printed.

At this time, if you know that the length of the paper is the same as the previous time, you can omit the detection operation using Hl, perform only the detection using Hl, and repeat it to print the mark with a simple operation. can.

FIG. 4 shows an operation flowchart of the central control unit CPU and the counter CTC when marking the distance from the leading edge of the paper.

The moving medium here is not limited to paper, and may be a synthetic resin sheet or a thin metal plate.

Of course, the length from the tip can be set to a value other than ÷, and the mark is not limited to printing, but can also be punched at a desired position, so the term mark is interpreted in a broad sense, including the attachment of small pieces.

In this way, according to the present invention, it is possible to accurately and easily measure the length from the leading edge of the medium and print a mark or punch a hole at a predetermined position.

Since the position is determined in relation to the length from the leading edge of the medium, it is sufficient to control the medium so that it travels between the detection means at a predetermined speed, which simplifies the control device and allows an extremely wide range of applications.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a diagram schematically showing the case where the present invention is applied to a copying machine, Fig. 2 is a diagram showing an example of a specific device used in Fig. 1, and Fig. 3 is a diagram showing an example of a specific device used in Fig. 1. FIG. 2 shows a time chart for explaining the operation, and FIG. 4 shows an operation flow chart. CPY... Copying section, Hl, H2... Light detection device, PR... Mark printing mechanism section, R1-
R4...Roller, PP...Paper, CPU
... Central control unit, CTC ... Clock pulse counter, MEM ... Memory device, BS.
...Bus line.

Claims (1)

[Scope of utility model registration request] A conveyance path for conveying the medium, a first detector provided on the conveyance path to detect the leading and trailing ends of the medium being conveyed, and a detection method for detecting the medium based on the output of the first detector and the conveyance speed of the medium. a calculation unit that calculates the length; a calculation unit that determines a position on the medium to be marked based on the length of the medium calculated by the calculation unit; and a calculation unit that is located on the transport path and downstream of the first detector. a second detector for detecting the leading edge of the medium; a transport distance from the medium edge obtained in response to the medium detection output of the second detector matches the position specified by the calculation unit; 1. An automatic mark-applying device on a medium, comprising: a mark-applying section that applies a mark when a mark is applied to a medium.