JPS6179657A - Detecting method for misregistering - Google Patents

Abstract

PURPOSE:To enable to easily distinguish the degree of misregistering of a printing body from the position relation between a detecting mark and a processing part, by a method wherein the detecting mark of printing shear of a pattern along the appearance shape of the processing part is printed at the same time with the printing body approaching to the processing part. CONSTITUTION:The misregistration detecting mark 7 is a U letter pattern along the appearance shape of an oval hole 62, and it is necessary that this mask 7 is printed at the same time with printing bodies 51, 52 (at the same printing process). This is because it is required that the position discrepancy of printing bodies 51, 52 appears as it is the position discrepancy of the detecting mark 7. When the position discrepancy of printing bodies 51, 52 occur a to the left direction and b to the under direction, the position discrepancy of the detecting mark also occurs as A=a, B=b, so the discrepancy of the position relation between the oval hole 62 are produced. The degree of the position discrepancy of the detecting mark 7 to the right and left direction can be distinguished by the degree one of two arms parts 71, 72 of the U-letter pattern leaves the oval hole 62, and the other is missing without being printed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing misalignment detection method that can easily visually determine misalignment of characters, etc. printed on a display panel or the like.

[Conventional technology]

Various characters and the like are printed on the display panel of the radio receiver. Examples of printing methods include hot stamping as shown in FIG. In this method, a heating head 2 is lowered from above via a roll-shaped printing ribbon 1, and characters, etc. corresponding to the shape of printed characters 3 on the lower surface are printed on a display panel 4 using the principle of thermal transfer.

FIG. 3 shows an example of the display panel 4 after printing, and 51.degree. 52 is a printed material. In this example, the printed body 51 is rTUNEJ representing tuning, and the printed body 52 is rTONEJ representing tone, rsWJ representing switch, r P U S HJ representing Bousochet type,
A set of rVOLJs representing a home. 61
．． Reference numeral 62 denotes a through hole for operation shafts for switches, volume controls, etc., which is formed in a fixed position by pressing or the like when forming the display panel 4.

[Problem that the invention seeks to solve]

Since the printed bodies 51 and 52 are printed in a separate process on the display panel 4 in which the holes 61 and 62 have been formed in advance, the printed bodies 51 and 52 may be misplaced due to misalignment of the display panel 4 in the printing process. It is possible that the position may deviate from the original position.

Conventionally, hide gauges, loopers, etc. have been used to detect this printing misalignment and pink up non-standard display panels, but it is inconvenient to use measuring tools each time for parts that are produced in large quantities. There was a drawback that it took a lot of time to inspect all products. In the present invention, a detection mark for determining positional deviation is simultaneously printed separately from the printed material for display, and misalignment of the printed material for display can be easily detected based on the positional relationship between the mark and non-protruding processed parts such as holes. It enables detection.

Means for Solving Problem c] The present invention provides printed material such as characters at a predetermined position of a printing target such as a display panel having a non-protruding processed part such as a recess, a hole, or a notch at a predetermined position. When printing, at the same time, print a printing deviation detection mark in a pattern that follows the external shape of the processed part in proximity to the non-protruding processed part.1. The present invention is characterized in that the degree of misalignment of the printed material is detected from the positional relationship between the detection mark and the processing section.

[Effect]

Non-protruding portions, such as recesses and holes, which are preformed in fixed positions on a printing object such as a display panel, provide reference positions for detecting misalignment of printed materials such as characters.

However, the printed material and the processing section are generally separated, and it is not easy to determine the degree of positional deviation even if the positional relationship of rain sounds is directly compared.

Therefore, if a printed misalignment detection mark with a pattern that follows the external shape of the processed area is printed close to the processed area at the same time as the printed material, the degree of misalignment of the printed material can be easily checked based on the positional relationship between the detection mark and the processed portion. can be determined (without using special measuring tools). This will be explained in detail below with reference to illustrated embodiments.

〔Example〕

FIG. 1 is a plan view showing an embodiment of the present invention, in which (al indicates the state before printing and a mountain) and (C1 indicates the state after printing. 7 is a printing misalignment detection mark, and an oblong hole 62. This mark 7 is a 0 character pattern that follows the external shape of the printed material 5.
1.52 must be printed at the same time (in the same printing process). This is because it is desired that the positional deviations of the printed bodies 51 and 52 appear as they are as the positional deviations of the detection marks 7.

Fig. 1 (bl is a state where there is no printing shift. In this case, the distance between the inner edge of the detection mark 7 and the outer edge of the oblong hole 62 is equal (although it is possible to have close contact with the distance 0, If a gap is created, fine positional deviations can be detected.) Figure 1 (C1 shows a case where a positional deviation a to the left and a position b downward to the printed material 51, 52 have occurred. In this case, the detection mark 7 also has A=a.

Since a positional deviation B=b occurs, a deviation occurs in the positional relationship with the oblong hole 62. The degree of displacement of the detection mark 7 in the left-right direction is the two arms of the 0-character pattern 71.72
This can be determined by the degree to which one of the two is separated from the oblong hole 62 and the other is not printed and is chipped. Further, the degree of downward positional deviation can be determined by the degree of separation between the bottom part 73 of the 0-shaped pattern and the oblong hole 62, and the degree of upward positional deviation can be determined by the extent to which the bottom part 73 is missing. 0 surrounding the detection mark 7 and the oblong hole 62
A letter-shaped pattern may be used, and if part of the pattern is missing as a result of printing misalignment, it may be determined that the product is defective.

FIG. 2 shows another embodiment of the present invention, taking as an example a display panel that prints on both the front and back sides. (al is display panel 4
This is a plan view showing the surface of , in addition to what is shown in FIG. 1, a printed body 53 and holes 63 to 65 are shown. Printed material 51~
53 and the detection pattern 7 are printed simultaneously, for example by silk screen printing technique. The operating shaft of a tuning rotary button 81 is inserted through the round hole 61 as shown in FIG. . Since the detection mark 7 is shielded from the outside by this operation button 82, the aesthetic appearance is not spoiled. The hole 63 is for adjusting the antenna trimmer, and the rectangular hole 64 is for inserting the preset button 83. The elongated hole 65 is a window for displaying a frequency scale, and a transparent scale plate 9 is fixed thereto from the back side as shown in FIG. 2 (5).

This scale plate 9 is printed with a printed material 54 (AM53 70~160XLOK) necessary as a frequency scale using the real stamp technique.
Hz and 2 columns of 5CALE O.1.2 to 10) are printed so as to form a normal image when viewed from the surface. At this time, a printing deviation detection mark 7' is simultaneously printed at a position that cannot be seen from the window 65. A U-shaped recess 91 is previously formed at this position by press working. FIG. 2+d) is an enlarged view of this part, and the detection mark 7' is printed inside the recess 91 if there is no printing misalignment. However, if there is a printing misalignment, the detection mark 7
Since a portion of the detection mark 7' overlaps the recess 91, the edge of the detection mark 7' is chipped or partially discontinuous, and printing misalignment can be determined from the degree of this.

Although the holes 62 and the recesses 91 are used as reference non-protruding portions on each side described above, cutouts may also be used in addition to these. Further, the printing deviation detection mark 7° 7' may have a similar pattern as long as it follows the external (outside or inside) shape of this type of non-protruding processed portion. It is preferable that the detection mark is located in a part that is hidden from view by other parts, but if it cannot be hidden, it may be incorporated into another part of the design so as not to spoil the aesthetics. . Also, 2
Printing deviations in the rotational direction can be easily detected by printing detection marks on more than one location at the same time.

〔Effect of the invention〕

As described above, according to the present invention, printing misalignment can be easily detected visually without using a measuring tool, and the quality of the print finish can be easily determined in a short time based on the degree of misalignment.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing another embodiment of the invention, Fig. 3 is an explanatory diagram of a conventional printing misalignment detection method, and Fig. 4 is an explanatory diagram showing a conventional printing misalignment detection method. It is an explanatory diagram showing an example of a method. In the figure, 4 is a display panel, 51 to 54 are printed bodies, 6 and 2 are holes, 7 and 7' are printing deviation detection marks, 9 is a scale plate, 9
1 is a recessed portion. Applicant Fujitsu Ten Co., Ltd. Representative Patent Attorney Minoru Aoyagi Figure 1 (d) Figure 2

Claims (1)

[Claims] When printing text such as letters at a predetermined position on a printing target such as a display panel that has a non-protruding processed part such as a recess, a hole, or a notch at a predetermined position, at the same time, it is necessary to A printing misalignment detection method comprising printing a printing misalignment detection mark in a pattern that follows the external shape of the processed portion, and detecting the degree of misalignment of the printed body from the positional relationship between the detection mark and the processed portion. .