Panel label limiting device and panel label pasting system

By designing the panel label limiting device, the coordinated effect of the base, ruler and limit block is used to achieve accurate positioning and limiting assistance for the label pasting position, solving the problem of unfixed label pasting position and easy distortion and inclination, and improving the neatness and cleanliness of the panel.

CN222973823UActive Publication Date: 2025-06-13SHANGHAI ZHENGFAN TECH +1
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Patent Information

Application Number
CN202422044529.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-21
Publication Date
2025-06-13
Estimated Expiration
2034-08-21

AI Technical Summary

Technical Problem

During the preparation of semiconductor materials, the label is not fixed, resulting in the label being easily distorted and inclined, affecting the neatness and aesthetics of the panel.

Method used

A panel label limiting device is designed, including a base, a first ruler, a second ruler and a limit block. Through the synergy of these components, precise positioning and limiting assistance of the label pasting position are achieved.

Benefits of technology

It effectively solves the problem of unfixed label pasting position and easy distortion and inclination of labels, improves the positioning accuracy and neatness of panel labels, and meets the cleanliness requirements of 10,000-level clean room.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a panel label limiting device and a panel label pasting system, and belongs to the technical field of semiconductor material manufacturing. The panel label limiting device comprises a base, a first scale rod, a second scale rod and a limiting block. The first scale rod is mounted at the top of the base and extends in a first preset direction; the second scale rod is connected with the first scale rod and can slide in the first preset direction, the second scale rod extends in the second preset direction, and the second preset direction is perpendicular to the first preset direction; the limiting block is connected with the second scale rod and can slide in the second preset direction, and a gap is formed between the bottom of the limiting block and the bottom of the base so that the panel can be inserted below the base and abut against the side face of the base; and the joint between the limiting block and the second scale rod is used for limiting the label. By using the panel label limiting device, the problems that in the label pasting process, the pasting position is not fixed, and the label is prone to being distorted and inclined can be solved.
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Description

Technical Field

[0001] This application relates to the technical field of semiconductor material manufacturing. Specifically, it relates to a panel label limiting device and a panel label pasting system. Background Art

[0002] In the prior art, various high-purity gas sources are usually used in the preparation process of semiconductor materials. Among them, the panel assembly corresponding to the high-purity gas source and the subsequent label pasting process are usually carried out in a class 10,000 clean room. At present, the label pasting position mainly relies on the subjective judgment of the human eye, resulting in problems such as non-fixed pasting positions and easy distortion and inclination of the labels, thus affecting the neatness and aesthetics of the panels in the same batch. Summary of the Utility Model

[0003] The purpose of this application is to provide a panel label limiting device and a panel label pasting system. Using this panel label limiting device can accurately position the label pasting position on the panel and also play a role in limiting and assisting the label during pasting, thus solving problems such as non-fixed pasting positions and easy distortion and inclination of the labels during the label pasting process. At the same time, this panel label limiting device also has the advantages of simple structure and small volume, and can meet the cleanliness requirements of a class 10,000 clean room.

[0004] The embodiments of this application are implemented as follows:

[0005] In a first aspect, an embodiment of this application provides a panel label limiting device, including a base, a first scale rod, a second scale rod, and a limiting block. The first scale rod is installed on the top of the base and extends along a first preset direction; the second scale rod is connected to the first scale rod and can slide along the first preset direction. The second scale rod extends along a second preset direction, and the second preset direction is perpendicular to the first preset direction; the limiting block is connected to the second scale rod and can slide along the second preset direction. There is a gap between the bottom of the limiting block and the bottom of the base, so that the panel can be inserted below the base and abuts against the side of the base; and the connection between the limiting block and the second scale rod is used to limit the label.

[0006] In the above technical solution, the panel label limiting device is composed of a base, a first scale rod, a second scale rod and a limiting block. Among them, the second scale rod can slide on the first scale rod along a first preset direction, and the limiting block can slide on the second scale rod along a second preset direction. Through the position adjustment in two directions, the limiting block can be adjusted to a specific position on the panel for pasting labels. At the same time, there is a gap between the bottom of the limiting block and the bottom of the base, so that the panel can be inserted under the base and abutted against the side of the base, thereby realizing the assembly of the limiting device and the panel. The connection between the limiting block and the second scale rod is used to limit the label, and can play a role in assisting the label limiting during the label pasting process. Through the combined action of multiple functional structures, problems such as the non-fixed pasting position and the easy distortion and inclination of the label during the label pasting process can be solved. At the same time, the panel label limiting device also has the advantages of simple structure (i.e., less particulate pollutants carried inside) and small volume (i.e., small space occupation), and can meet the use requirements of a ten-thousand-class clean room.

[0007] In some alternative embodiments, the first scale rod is detachably connected to the top of the base.

[0008] In the above technical solution, setting the first scale rod to be detachably connected to the top of the base helps to replace and repair it when some functional structures fail or are damaged.

[0009] In some alternative embodiments, the first scale rod includes a first scale rod body and connectors located at both ends of the first scale rod body. The two connectors are respectively detachably connected to the corresponding areas at the top of the base, and there is a gap between the bottom of the first scale rod body and the top of the base. One end of the second scale rod is slidably sleeved outside the first scale rod body.

[0010] In the above technical solution, setting the first scale rod in the form of a combination of a first scale rod body and connecting blocks at both ends, so that the connection area and the scale area of the first scale rod are separately arranged, has the advantage of a more reasonable layout. In addition, there is a gap between the bottom of the first scale rod body and the top of the base, and one end of the second scale rod is slidably sleeved outside the first scale rod body, so that the second scale rod can be more conveniently and firmly fixed on the first scale rod body.

[0011] In some alternative embodiments, the first scale rod body includes a first rod body and a first scale. The cross-sectional shape of the first rod body in a direction perpendicular to the first preset direction is rectangular, and the first scale is installed on the top of the first rod body.

[0012] In the above technical solution, the first scale rod body is composed of a first rod body and a first scale. Specifically, a first rod body with a rectangular cross-section is adopted, and the first scale is installed on the top of the first rod body, which has the advantages of being convenient for setting the scale and convenient for technicians to observe the scale value.

[0013] In some alternative embodiments, the first scale rod body further includes limiting members. In the second preset direction, limiting members are provided on both sides of the first rod body, and the upper end of each limiting member protrudes above the top of the first rod body, so that the first scale is located between the top of the first rod body and the two limiting members.

[0014] In the above technical solution, by adding limiting members with upper ends protruding above the top of the first scale rod body and installing the first scale between the top of the first rod body and the limiting members, the probability of the first scale being worn during use can be reduced, thus effectively protecting the first scale.

[0015] In some alternative embodiments, the second scale rod includes a second scale rod body and a connecting block located at one end of the second scale rod body. The connecting block is slidably sleeved outside the first scale rod, and the limiting block is slidably sleeved outside the second scale rod. In the second preset direction, the side of the limiting block close to the connecting block can be in contact with the side surface of the base.

[0016] In the above technical solution, the second scale rod is configured in a form where the second scale rod body and the connecting block located at one end cooperate with each other, so that the connection area and the scale area of the second scale rod are separately arranged, which has the advantage of a more reasonable layout. In addition, in the second preset direction, the side of the limiting block close to the connecting block is arranged to be able to be in contact with the side surface of the base, so that the overall structure of the limiting device is more compact. At the same time, it also helps to improve the positioning accuracy of the pasting position.

[0017] In some alternative embodiments, the bottom of the connecting block abuts against the top of the base.

[0018] In the above technical solution, the bottom of the connecting block is arranged to abut against the top of the base, so that the top of the base can bear the connecting block, which helps to improve the installation stability of the connecting block.

[0019] In some alternative embodiments, a protective layer is provided on one side of the base for fitting the panel and / or the bottom of the limiting block.

[0020] In the above technical solution, by providing a protective layer on the side of the base and the limiting block for fitting the panel, it can effectively prevent metal particles from being generated during the contact and friction process between the panel and the corresponding structure, so as to better meet the cleanliness requirements of a ten-thousand-class clean room.

[0021] In some alternative embodiments, the panel label limiting device further includes a first positioning member and a second positioning member. The first positioning member is connected to the second scale rod and is used to fix the second scale rod to the first scale rod; the second positioning member is connected to the limiting block and is used to fix the limiting block to the second scale rod.

[0022] In the above technical solution, the panel label limiting device is additionally provided with a first positioning member and a second positioning member capable of positioning the second scale rod and the limiting block respectively, so as to fix the entire limiting device after adjusting the limiting block to a specific position for pasting labels on the panel, so that the same standard can be used to paste labels on other panels of the same batch, that is, only one adjustment of the limiting device is required to paste labels on multiple panels of the same batch, which helps to reduce the workload.

[0023] In a second aspect, an embodiment of the present application provides a panel label pasting system, including the panel label limiting device provided in the embodiment of the first aspect.

[0024] In the above technical solution, the panel label pasting system adopts the panel label limiting device provided in the embodiment of the first aspect, which can accurately position the pasting position of the label on the panel and also play a role in limiting and assisting the label during pasting, thereby solving the problems of unfixed pasting position and easy distortion and inclination of the label during the label pasting process; at the same time, the panel label limiting device also has the advantages of simple structure and small volume, and can meet the cleanliness requirements of a class 10,000 clean room. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0026] Figure 1 Schematic diagram of the structure of a panel label limiting device provided by an embodiment of the present application;

[0027] Figure 2 Cross-sectional view of the first scale rod body provided by the first embodiment of the present application;

[0028] Figure 3 Cross-sectional view of the second scale rod body provided by the second embodiment of the present application;

[0029] Figure 4 Schematic diagram of the structure of a second scale rod provided by an embodiment of the present application;

[0030] Figure 5 For Figure 1 Partial enlarged view of the A position in

[0031] Figure 6 Schematic diagram of the structure of a panel label pasting system provided by an embodiment of the present application.

[0032] Icons: 10 - Panel label limiting device; 100 - Base; 200 - First scale rod; 210 - First scale rod body; 211 - First rod body; 212 - First scale; 213 - Limiting member; 220 - Connecting member; 300 - Second scale rod; 310 - Second scale rod body; 320 - Connecting block; 400 - Limiting block; 500 - First positioning member; 600 - Second positioning member; 1 - Panel label pasting system; 20 - Panel; a - First preset direction; b - Second preset direction. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0035] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] The following specifically describes a panel label limiting device and a panel label pasting system of the present application.

[0040] Refer to Figure 1 , in a first aspect, an embodiment of the present application provides a panel label limiting device 10, including a base 100, a first scale rod 200, a second scale rod 300, and a limiting block 400. The first scale rod 200 is installed on the top of the base 100 and extends along a first preset direction a; the second scale rod 300 is connected to the first scale rod 200 and can slide along the first preset direction a, the second scale rod 300 extends along a second preset direction b, and the second preset direction b is perpendicular to the first preset direction a; the limiting block 400 is connected to the second scale rod 300 and can slide along the second preset direction b, and there is a gap between the bottom of the limiting block 400 and the bottom of the base 100, so that a panel can be inserted below the base 100 and abutted against the side surface of the base 100; and the connection between the limiting block 400 and the second scale rod 300 is used to limit the label.

[0041] In the present application, the panel label limiting device 10 is composed of a base 100, a first scale rod 200, a second scale rod 300, and a limiting block 400. Among them, the second scale rod 300 can slide on the first scale rod 200 along the first preset direction a, and the limiting block 400 can slide on the second scale rod 300 along the second preset direction b. Through the position adjustment in two directions, the limiting block 400 can be adjusted to a specific position on the panel for pasting the label; at the same time, there is a gap between the bottom of the limiting block 400 and the bottom of the base 100, so that the panel can be inserted below the base 100 and abutted against the side surface of the base 100, thereby realizing the assembly of the limiting device and the panel; the connection between the limiting block 400 and the second scale rod 300 is used to limit the label, which can play a role in limiting and assisting the label during the label pasting process. Through the combined action of multiple functional structures, problems such as the non-fixed pasting position and the easy distortion and inclination of the label during the label pasting process can be solved; at the same time, the panel label limiting device 10 also has the advantages of simple structure (that is, less particulate contaminants carried inside) and small volume (that is, small space occupation), and can meet the use requirements of a ten-thousand-class clean room.

[0042] Refer to Figure 1, as an example, the first scale rod 200 is detachably connected to the top of the base 100.

[0043] In this embodiment, setting the first scale rod 200 to be detachably connected to the top of the base 100 helps with replacement and maintenance when some functional structures malfunction or are damaged.

[0044] In other possible embodiments, the first scale rod 200 and the base 100 may also be integrally provided.

[0045] Refer to Figure 1 , as an example, the first scale rod 200 includes a first scale rod body 210 and connectors 220 located at both ends of the first scale rod body 210. The two connectors 220 are respectively detachably connected to the top of the corresponding area of the base 100 and there is a gap between the bottom of the first scale rod body 210 and the top of the base 100. One end of the second scale rod 300 is slidably sleeved outside the first scale rod body 210.

[0046] In this embodiment, the first scale rod 200 is set in the form of a combination of the first scale rod body 210 and the connecting blocks 320 at both ends, so that the connection area and the scale area of the first scale rod 200 are separately arranged, which has the advantage of a more reasonable layout; in addition, there is a gap between the bottom of the first scale rod body 210 and the top of the base 100, and one end of the second scale rod 300 is slidably sleeved outside the first scale rod body 210, so that the second scale rod 300 can be more conveniently and firmly fixed on the first scale rod body 210.

[0047] It should be noted that the form of the detachable connection is not limited. For example, it can be a bolt connection, that is, corresponding threaded holes are provided in both the connector 220 and the top of the base 100, and the two are detachably connected by bolts.

[0048] Refer to Figure 2 and Figure 3 , as an example, the first scale rod body 210 includes a first rod body 211 and a first scale 212. The cross-sectional shape of the first rod body 211 in a direction perpendicular to the first preset direction a is rectangular, and the first scale 212 is installed on the top of the first rod body 211.

[0049] In this embodiment, the first scale rod body 210 is composed of the first rod body 211 and the first scale 212. Specifically, the first rod body 211 with a rectangular cross-section is adopted, and the first scale 212 is installed on the top of the first rod body 211, which has the advantages of facilitating the setting of the scale and facilitating technicians to observe the scale value.

[0050] Refer to Figure 3, as an example, the first scale rod body 210 further includes a limiting member 213. On both sides of the first rod body 211 in the second preset direction b, limiting members 213 are provided. The upper end of each limiting member 213 protrudes from the top of the first rod body 211, so that the first scale 212 is located between the top of the first rod body 211 and the two limiting members 213.

[0051] In this embodiment, the first scale rod body 210 is provided with a limiting member 213 whose upper end protrudes from the top of the first rod body 211, and the first scale 212 is installed between the top of the first rod body 211 and the limiting member 213, which can reduce the probability of the first scale 212 being worn during use, thereby effectively protecting the first scale 212.

[0052] In other possible embodiments, the first scale 212 may also directly protrude from the top of the first rod body 211.

[0053] Refer to Figure 4 , as an example, the second scale rod 300 includes a second scale rod body 310 and a connecting block 320 located at one end of the second scale rod body 310. The connecting block 320 is slidably sleeved outside the first scale rod body 210, and the limiting block 400 is slidably sleeved outside the second scale rod body 310. In the second preset direction b, the side of the limiting block 400 close to the connecting block 320 can be attached to the side surface of the base 100.

[0054] In this embodiment, the second scale rod 300 is set in the form of a combination of the second scale rod body 310 and the connecting block 320 located at one end, so that the connection area and the scale area of the second scale rod 300 are separately arranged, which has the advantage of a more reasonable layout; in addition, in the second preset direction b, the side of the limiting block 400 close to the connecting block 320 is set to be able to be attached to the side surface of the base 100, so that the overall structure of the limiting device is more compact. At the same time, it also helps to improve the positioning accuracy of the pasting position.

[0055] It should be noted that the form of the second scale rod body 310 is not limited, and it can be specifically set according to the form of the first scale rod body 210.

[0056] As an example, the bottom of the connecting block 320 abuts against the top of the base 100.

[0057] In this embodiment, the bottom of the connecting block 320 is set to abut against the top of the base 100, so that the top of the base 100 can bear the connecting block 320, which helps to improve the installation stability of the connecting block 320.

[0058] As an example, a protective layer (not shown in the figure) is provided on one side of the base 100 for fitting the panel 20 and / or the bottom of the limiting block 400.

[0059] In this embodiment, a protective layer is provided on the sides of the base 100 and the limiting block 400 that are used to fit the panel, which can effectively prevent metal particles from being generated during the contact and friction between the panel and the corresponding structure (the materials of the panel and the limiting device are usually metal materials), so as to better meet the cleanliness requirements of a class 10,000 clean room.

[0060] Refer to Figure 5 , as an example, the panel label limiting device 10 further includes a first positioning member 500 and a second positioning member 600. The first positioning member 500 is connected to the second scale rod 300 and is used to fix the second scale rod 300 to the first scale rod 200; the second positioning member 600 is connected to the limiting block 400 and is used to fix the limiting block 400 to the second scale rod 300.

[0061] In this embodiment, the panel label limiting device 10 is additionally provided with a first positioning member 500 and a second positioning member 600 that can respectively position the second scale rod 300 and the limiting block 400, so as to fix the entire limiting device after adjusting the limiting block 400 to a specific position for attaching a label on the panel, so that the same standard can be used to attach labels to other panels 20 of the same batch, that is, only one adjustment of the limiting device is required for attaching labels to multiple panels of the same batch, which helps to reduce the workload.

[0062] It should be noted that the forms of the first positioning member 500 and the second positioning member 600 are not limited, and they can be set according to the conventional selection in the art. For example, both the first positioning member 500 and the second positioning member 600 are bolts. Specifically, screw holes are opened in the corresponding areas where the second scale rod 300 is slidably connected to the first scale rod 200, and the depth of the screw holes extends to the surface of the rod body of the first scale rod 200. One end of a bolt (i.e., the first positioning member 500) is installed in the screw hole. After the second scale rod 300 moves to a specific position on the first scale rod 200, only the bolt needs to be rotated until the bottom of the bolt abuts against the surface of the first scale rod 200 to fix the second scale rod 300 to the first scale rod 200. Similarly, screw holes are opened in the corresponding areas where the limiting block 400 is slidably connected to the second scale rod 300, and the depth of the screw holes extends to the surface of the rod body of the second scale rod 300. One end of a bolt (i.e., the second positioning member 600) is installed in the screw hole. After the limiting block 400 moves to a specific position on the second scale rod 300, only the bolt needs to be rotated until the bottom of the bolt abuts against the surface of the second scale rod 300 to fix the limiting block 400 to the second scale rod 300.

[0063] It should be noted that the structures or functional units in the panel label limiting device 10 that are not specifically described can be set according to the conventional selection in the art.

[0064] Refer toFigure 6 , in a second aspect, an embodiment of the present application provides a panel label pasting system 1, including a panel label limiting device 10 provided in the embodiment of the first aspect.

[0065] In the present application, the panel label pasting system 1 adopts the panel label limiting device 10 provided in the embodiment of the first aspect, which can accurately position the pasting position of the label on the panel 20 and also play a role in limiting and assisting the label during pasting, thereby solving problems such as the unfixed pasting position and the easy distortion and inclination of the label during the label pasting process; at the same time, the panel label limiting device 10 also has the advantages of simple structure and small volume, and can meet the cleanliness requirements of a ten-thousand-class clean room.

[0066] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A panel label limiting device, characterized in that: include: Pedestal; A first scale rod, which is mounted on the top of the base and extends along a first preset direction; a second scale rod, the second scale rod being connected to the first scale rod and being slidable along the first preset direction, the second scale rod extending along a second preset direction, the second preset direction being perpendicular to the first preset direction; A limit block is connected to the second scale rod and can slide along the second preset direction, and there is a gap between the bottom of the limit block and the bottom of the base so that the panel can be inserted under the base and abut against the side of the base; and the connection between the limit block and the second scale rod is used for limiting the label.

2. The panel label limiting device according to claim 1, characterized in that: The first scale rod is detachably connected to the top of the base.

3. The panel label limiting device according to claim 2, characterized in that: The first scale rod includes a first scale rod body and connecting pieces at both ends of the first scale rod body, the two connecting pieces are detachably connected to the top of the corresponding area of ​​the base respectively so that there is a gap between the bottom of the first scale rod body and the top of the base, and one end of the second scale rod is slidably mounted outside the first scale rod body.

4. The panel label limiting device according to claim 3, characterized in that: The first scale rod body comprises a first rod body and a first scale. The cross-section of the first rod body perpendicular to the first preset direction is a rectangle. The first scale is installed on the top of the first rod body.

5. The panel label limiting device according to claim 4, characterized in that: The first ruler rod body also includes a limiting piece. In the second preset direction, the limiting pieces are arranged on both sides of the first rod body, and the upper end of each limiting piece protrudes from the top of the first rod body, so that the first ruler is located between the top of the first rod body and the two limiting pieces.

6. The panel label limiting device according to claim 3, characterized in that: The second scale rod includes a second scale rod body and a connecting block located at one end of the second scale rod body, the connecting block is slidably mounted outside the first scale rod body, the limit block is slidably mounted outside the second scale rod body, and in the second preset direction, a side of the limit block close to the connecting block can be fitted with a side surface of the base.

7. The panel label limiting device according to claim 6, characterized in that: The bottom of the connecting block abuts against the top of the base.

8. The panel label limiting device according to any one of claims 1 to 7, characterized in that: A protective layer is provided on one side of the base for adhering to the panel and / or on the bottom of the limiting block.

9. The panel label limiting device according to any one of claims 1 to 7, characterized in that: The panel label limiting device also includes a first positioning member and a second positioning member, wherein the first positioning member is connected to the second scale rod for fixing the second scale rod to the first scale rod; and the second positioning member is connected to the limiting block for fixing the limiting block to the second scale rod.

10. A panel label pasting system, characterized in that: It comprises the panel label limiting device as claimed in any one of claims 1 to 9.