JPS59126915A - Apparatus for inspecting number and print missing of paper or the like - Google Patents

Abstract

PURPOSE:To detect simultaneously numbers and print missing of a printed picture pattern by providing a mark sensor and an edge sensor at a part on an apparatus on which a printed matter is passed. CONSTITUTION:The mark sensor and edge sensor 5 for detecting print missing, and a contact switch 6 for number calculation are provided in a stage when the paper or the like is passed through by a feeding apparatus A. The apparatus A consisting of a conveyer and a roll group collects smoothly the printed matter to an accumulating part 7 of the printed matter. In the apparatus 5 for print missing inspection, the passing of a printed matter B of e.g. post card, etc, is inspected by the edge sensor 8 using an optical fiber 9. The presence or absence of the picture pattern is inspected by the mark sensor 10 for detecting picture pattern of postage stamp.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a number of sheets of paper and a deprinting detection device. In particular, by counting postcards, certificates, gift certificates, stock certificates, etc. in the form of hand stamps, and at the same time detecting whether or not a predetermined pattern has been unprinted, these two processes, which were previously performed separately, can be combined into one device. This is intended to save labor and guarantee quality.

Traditionally, in the inspection process for small-scale securities such as postcards, certificates, gift certificates, and stock certificates, visual inspection was used to check for deprinting, misregistration, uneven coloring, etc.; There was a process of manually counting and summarizing the number of sheets. Since the pattern was inspected visually, defective products (for example, unprinted products) could sometimes be mixed in, which caused a big problem.

In addition, as a device for detecting unprinting of printed matter, for example, there is a full-size inspection device, but in this case, a special mark is printed on the margin outside the finished area of the printing paper using the same plate as the image, and it is read by an optical sensor. It detects off-printing and misregistration based on the presence or absence of marks and differences in their positions. However, this device cannot be used conveniently if the finished paper is so full that there is not enough space to print the special mark.

In that case, other methods were needed, such as full-size needle inspection or visual inspection using hand stamps.

The device of the present invention solves the above-mentioned drawbacks and complications, and its gist is that a mark sensor and an Esso sensor are installed on a part of the device through which the printed matter passes, and the printed matter is printed at the same time as the printed matter. The reason is that it is possible to detect out-of-printing of designs.

The device of the invention will now be described by way of an illustrated embodiment.
The figure is an explanatory diagram of the number of sheets and the deprinting detection device of the present invention. 1
2 indicates the accumulation of sheets of the previous product, such as postcards, 2 and 3 are feed rolls, and 4 is a two-sheet fixing device. A mark sensor for detecting unprinting, an edge sensor 5, and a contact switch 6 for calculating the number of sheets are provided in the process of paper passing through the feeding device A. The printed matter is smoothly collected in the printed matter accumulating section 7 by the feeding device Aid conveyor and the roll group. FIG. 2 is an explanatory diagram of the deprinting detection device 5, where B is a printed matter such as a postcard, and 8 is an edge sensor using an oxidized fiber 9 to detect the passage of the printed matter. Reference numeral 10 is a mark sensor for detecting a stamp pattern, which detects the presence or absence of a pattern. All of these sensors can be commercially available.

FIG. 3 is an operating characteristic diagram of this device. For example, a is the scanning line of the mark sensor of postcard B, and b is the scanning line of the edge sensor. C is stamped. C is the width of one postcard. ■ is a mark sensor signal, ■ is an edge sensor signal, ■ is judgment synchronization, and ■ is NG high output. d is the stamp in the diagram, d' is the stamp part, ■
In , C' indicates a good product, C" is a detection part when stamp B is present, d is absent, and d' is a signal part indicating that there is no stamp in the stamp part. The upper part of the line is a clear part. The lower part is the dark part, but the mark sensor and edge sensor can be used for both black and white and color depending on the pattern of the object to be inspected, but in either case, it is easy to detect the difference between the white background and the color of the printed part The mounting position of the 3° mark sensor is 6 to 10 mm from the product passing position, and the minimum detection mark width is 0.1.
E 3ML-M2B5 type etc. can be used, and in actual use it is detected in a range of 2 to 31 mm.

Also, the number of products is determined according to the function of the main device.

If a defective product from off-printing passes, the mark sensor O detects it, outputs an NG high output (for example, a buzzer), and stops counting at that point. In that case, the defective products will reach the accumulation section 7 in FIG. 1, so after removing them, the operation of starting the negative number again is performed.

Although the color, shape, position, density, etc. of the pattern to be detected differs depending on the item, it is possible to detect a wide range of patterns by adjusting the sensor position, orientation, and threshold level.

In this way, the above-mentioned inconvenience and complexity of the conventional technology has been significantly improved by the present invention.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the apparatus of the present invention, FIG. 2 is an explanatory diagram of the deprinting detection apparatus, and FIG. 3 is an operational characteristic diagram of this apparatus. ■・ ・Collection of postcards, etc. before the number of sheets 2.3 ・Feed roll 4 ・Two-sheet fixing device 5... Unprinting sensor 6...
Number calculation switch 7 ・Paper accumulation section 8 Era/so sensor 9...
・Off 0 fiber 10 ・・Mark sensor a for pattern detection ・Scanning line b of the postcard mark sensor ・・Scanning line C of the same edge sensor...
・Width of one postcard ■・・・Mark sensor signal ■・・Edge sensor signal ■・・Judgment synchronization ■・・NG output A
...Feeding device B in the device of the present invention...Postcard C...Stamp C'...
...Good product C"...Defective product d...
・Detection part d' when stamp B is present...Similarly, detection part when stamp B is not present Patent applicant Toppan Printing Co., Ltd.

Claims (1)

[Claims] In a counting machine that counts the number of sheet-fed printed matter with a printed pattern using a feeding method, a mark sensor and an Esso sensor are installed on a part of the device through which the paper passes, and it is possible to remove the printed pattern at the same time as counting the number of sheets. A count and off-printing detection device characterized by detecting.