JPS59148A - Method for displaying position information in web - Google Patents

Abstract

PURPOSE:To display exactly position information at prescribed positions in a web, by forming plural holes disposed in the lengthwise direction of the web by laser and forming position codes consisting of arrangement of holes different from each other. CONSTITUTION:Specific position codes 100 are formed at fixed intervals in the lengthwise direction of a web 1 at the side edge part of one side of the running web 1, and the running web 1 is guided by a follower roll 4 and the number of revolutions of the follower roll 4 is detected by a revolution detector 5 and this detected signal is supplied to a controlling part 3. By transferring a command signal corresponding to the position codes 100 to be formed to a laser oscillator 2 through a laser oscillation power source 21 is accordance with the detected signal from the controlling part 3, the laser oscillator 2 is operated and holes are made by irradiating laser light to prescribed positions of the web 1 to form the position codes 100 consisting of arrangement of holes different from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for displaying positional information on the web.

Generally, in the production of photographic film, the band-shaped base K
In this method, a web that is not coated with a re-optical layer and that overlaps with a true film material is widened and cut, and then this web is cut in the width and length directions to store the photographic film in a cartridge. -(2) It is necessary to remove any defects such as scratches or dirt on the photosensitive surface of the photographic film before storing it in the web. For this reason, a rotation detector is installed on the transport roller that transports the web. On the other hand, a defect detector is installed on the running path of the web, records the position of the defective part in the longitudinal direction with reference to the leading edge of the web, and removes the part containing the defective part based on this record. was.

However, in this method, slippage occurs between the web and the conveying roller, or the lengthwise dimension of the photographic film changes depending on temperature conditions, so the position signal of the detected defect may differ from the actual position. The coincidence is poor, and therefore, the photographic film has to be discarded in excess of the detected position error, resulting in a reduction in yield. In some cases, a part of the web is cut off midway in order to be used as a trench inspection sample, but in this case, the position of the leading edge changes, so the above method, which uses the leading edge as a reference, cannot determine the location of the defect. There was also the problem that it would get stuck.

(3) In order to deal with such problems, it has been proposed to display position information in advance at regular intervals along the length of the web. According to this method, by recording the position information immediately before the defective part and the length from that position information to the position of the defective part, it is possible to reduce the difference between scissors on the measuring scale, and to locate the defective part. It has the advantage that it can be detected accurately.

Conventionally, this has involved pasting a label on the web or printing a symbol to form a position code. There is a risk of printing errors, especially in the method of printing symbols, which requires contact between the printing machine and the web. Since the process must be temporarily stopped, the efficiency of the web manufacturing operation becomes low. Therefore, depending on the position code by pasting a label or printing a symbol, it is possible to detect the position of the defective part with high accuracy.
) The present invention was developed based on this background, and provides a method that can reliably display location information at the expected location on the web. It is characterized by a step of forming different position codes at regular intervals in the length direction of the web on the side edges of the web that is running in a fixed direction. The step of forming a hole is a step of forming a position hood consisting of a mutually different arrangement of holes by forming holes with a laser at one or more points selected from a plurality of points lined up in the length direction of the web. At the point.

The method of the present invention will be fully explained below with reference to one drawing.

In the method of the present invention, as shown in FIG. 1, specific position codes 100 are formed at regular intervals in the length direction of the web I on one side line of the running web I. This position code 100 &''ii has a hole at one or more points selected from a plurality of equally spaced points lined up in the length direction of the web. 5) It is distinguished from

Here, the method of drilling holes at points selected from a plurality of equally spaced points with a position code of 100Vc is performed as follows. As shown in FIG. 2, the running web 1 is guided by a driven roller 4, the number of rotations of the driven roller 4 is detected by a rotation detector 5, and this detection signal is supplied to the control section 3. Then, a command signal corresponding to the position code 100 to be formed on the web IK is emitted from the control unit 3 in accordance with the detection signal and in accordance with the running speed of the web 1, and this command signal is transmitted to the laser oscillation power source 211. By transmitting the laser beam to an oscillator 2, for example a carbon dioxide laser oscillator, the laser oscillator 2 is operated, and the laser beam is irradiated at a predetermined position on the web to make a hole, thereby forming a position code 100. As shown in FIG. 2, a reader 6 may be provided, and the signals read there may be displayed on a display 62 for confirmation via a signal processing section 61.

In displaying the position information using the position code 100, for example, the length (6) from the leading edge of the web 1 can be expressed in meters and the numerical value can be displayed as binary information. The total length of is 10
00 m, specify 10w1 equally spaced points in each position code 100, and indicate 375 points from the leading edge, so corresponding to this display, 10w1 points are specified as shown in Figure 3 (B) K.
Points A1 and A among equally spaced points A1'+-'A10
2. Drill holes in A3, A5, A6, A7, and A9. In other words, the holed part Vi corresponds to "1" expressed in binary system A
It corresponds to "0" displayed in partial binary system without one hole. Here, the hole can have a diameter of 0.5 m, for example, and the distance between A1 and AIO can be, for example, 2 (111). ~ Point A on the front side (left side in the figure) of the first point A1 of AIO] ~ A
At positions separated by a length M, which is larger than the mutual spacing between the IOs, a leading cord 200 is formed with a distance B2 between two six-fold lines aligned in the length direction of the web 1, and a point (7-inch Al- Al0ri・The point AIO at the rear of our house is also on the rear side (
On the right side of the figure, a trailing cord -300 is formed by opening one 60 at a distance M, which is larger than the distance between points A1 to AIO. By forming the leading hood 200 and trailing code 300 in this manner, the order in which the position codes 100 should be read is displayed, so that the position codes 100 can be read thereafter regardless of the running direction of the web 1. .

In the present invention, as described above, the position code 100 is formed by drilling holes in the web 1 using a laser. Since the process is carried out without contact between the ms and the web 1, the 11 holes can be drilled while the web is running, and there is no risk of reducing the efficiency of the web manufacturing operation.Moreover, the time required to drill the holes is 0,
Since it is extremely short at 25 m1ee, the position hood 100 can be reliably formed at a predetermined position with high accuracy even if the web travel speed is high.

In addition, if a carbon dioxide laser oscillator is used as the laser oscillator 2 as in the example above, the web will not be made of photographic film material because the wavelength of the laser is long. If there is a laser, holes can be made with high efficiency, but it is not limited to carbon dioxide laser, and various lasers can be used depending on the material of the web used.

In the present invention, when the web Itl is run at a constant speed, the rotation detector 5'5r is not used and the control m3
Pressure may also be applied to issue a command signal corresponding to the position hood 100 to be formed on the web 1 at regular time intervals.

Note that the position code formed according to the present invention is not limited to use for detecting defects, but may also be used, for example, for measuring the total length of a manufactured web.

As described above, according to the present invention, it is possible to provide a method for reliably displaying location information at a predetermined location on the web.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a part of a web having a position code formed by the method of the present invention, FIG. 2 is an explanatory diagram schematically showing an apparatus for carrying out the method of the present invention, and FIG. A)F
Explanatory diagram showing an example of display of i-location information, Figure 3 (B) #
-1t is a plan view showing a position code corresponding to the position information of FIG. 3(A). 1... Web 2... Laser oscillator 2
1...Laser oscillation power supply 3...Control unit 4...Followed roller 5...
・Time, waste detector 6...Reader 100...Position code 200...Start hood 300...Tail code

Claims (1)

[Claims] 1) The step of forming position codes that are different from each other at constant length intervals in the length direction of the web on the side edges of the running web, and the step of forming the position codes includes 1 selected from multiple points lined up in the length direction
By forming holes with a laser at the above points,
A method for displaying location information on a web, comprising the step of forming a location hood consisting of a mutually different array of holes.