JP2003128309A - Automatic label splicing apparatus and automatic label splicing method in label pasting machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A label sticking machine capable of reducing the time and cost of automatic label sticking work without having to stop the entire label sticking machine and the conveyor when replacing or replenishing labels L1 and L2. To provide an automatic label splicing apparatus and a label automatic splicing method in a machine. A first label supply unit (21) focuses on automatically joining one label roll to another label roll.
Alternatively, the first or second label
And the vacuum drive roller 33 capable of supplying the upstream label holding roller 30 and the downstream label holding roller 31, the upstream drive roller 32, and the joining label L3.
A first end detection sensor 26, a second end detection sensor 27, a joint end detection sensor 34,
And a label slack imparting section 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label automatic joining device and a label automatic joining method in a label sticking machine, and more particularly to a label sticking machine for feeding a label wound in a roll into a strip and sticking it to an article. And an automatic label splicing method.

[0002]

2. Description of the Related Art A conventional label sticking machine will be outlined with reference to FIGS. FIG. 9 is a schematic side view of a conventional label sticking machine 1, and FIG. 10 is a plan view of a label 2 loaded in the label sticking machine 1. The label sticking machine 1 includes a label supply unit 3 and a label guide. It has a unit 4, a label positioning sensor 5, a label peeling unit 6, a label sticking unit 7, and a mount winding unit 8. As shown in FIG. 10, in the label 2, a plurality of label pieces 10 are temporarily attached to the front surface of the strip-shaped mount 9 at a predetermined interval, and the position detection mark 11 is provided on the back surface of the mount 9. Printed,
The mark 11 can be detected by the label positioning sensor 5.

The label supply unit 3 winds and holds the label 2 in a roll shape, and drives the mount take-up unit 8 to feed the label 2 into a strip shape in the direction of the label guide unit 4 and the label peeling unit 6. Can be supplied to.

The label peeling unit 6 has a peeling plate 12, and only the mount 9 of the label 2 is reversed by the peeling plate 12 so that the label piece 10 faces the sticking roller 13 of the label sticking unit 7. The article M to which the label 2 (label piece 10) is attached is transferred by the conveyor 14, and the label attaching unit 7
By operating the sticking roller 13 in FIG.
Is attached to the article M.

Generally, necessary information is printed on the label 2 in advance in many cases, but if necessary, the printing section 15 for printing on the label strip 10 upstream of the label peeling section 6 is provided. Can be provided.

In the label applicator 1 having such a structure, when the label 2 is replaced or replenished, the entire label applicator 1 from the label supply unit 3 to the label guide unit 4, the label peeling unit 6 and the mount take-up unit 8 can be used. Since it is necessary to stop the conveyor 14, there is a problem that workability in the label sticking step is reduced and time and cost are required.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is not necessary to stop the entire label applicator and the conveyor in the label applicator at the time of label replacement or replenishment. An object is to provide a splicing device and an automatic label splicing method.

Another object of the present invention is to provide an automatic label joining device and an automatic label joining method in a label sticking machine that can realize continuous operation of the label sticking machine.

It is another object of the present invention to provide a label automatic joining device and a label automatic joining method in a label sticking machine, which does not need to stop the label transfer even when the label is replaced or replenished.

It is another object of the present invention to provide an automatic label joining device and an automatic label joining method in a label sticking machine which can reduce the time and cost of the automatic label sticking operation.

[0011]

That is, according to the present invention, a spare label roll is provided in advance, and when one label roll is lost, another label roll can be automatically spliced. Focusing on that, the first invention is an automatic label splicing device in a label sticking machine for feeding a label wound in a roll shape into a strip shape, and sticking the label to an article. A first label supply unit that winds a label in a roll shape and a second label supply unit that winds a second label in a roll shape separately from the first label supply unit are provided. The first or second label can be fed from the label supply unit in a strip shape to be supplied to the label joint portion, and the label joint portion can temporarily hold the first or second label. An upstream label holding roller and a downstream label holding roller, an upstream drive roller that cooperates with the upstream label holding roller, a downstream label holding roller that cooperates with the first label and the second label The vacuum drive roller capable of sucking and supplying the splicing label for splicing the label, and the end portion of the first label can be detected, and the downstream label holding roller and the vacuum drive roller can be used to The first end detection sensor that outputs a signal that enables the first label to be sandwiched, the end portion of the second label that can be detected, and the first label by the downstream label holding roller and the vacuum drive roller. A second end detection sensor that outputs a signal that enables the second label to be sandwiched; Of the first label or the second label can be detected, and the first label or the second label can be held between the upstream label holding roller and the upstream drive roller. A label end detection sensor that outputs a signal indicating that the label is loosened so that the joined strip-shaped label can be loosened by a predetermined length on the downstream side of the label joint. It is an automatic label splicing device in a label sticking machine, which is provided with a section.

A first upstream label tension holding roller for guiding the first label and having a one-way clutch, and a second roller for guiding the second label and having a one-way clutch are provided upstream of the label joint portion. 2 upstream label tension holding roller, and a downstream label tension holding roller for guiding the joined label and having a one-way clutch is provided on the downstream side of the label joint portion, and the vacuum drive roller is , Can have a one-way clutch.

The upstream label holding roller is the first
Alternatively, it is possible to provide an upstream cylinder that comes into contact with and separates from the second label, and a downstream cylinder that comes into contact with and separates the downstream label holding roller from the first or second label.

The splicing label can be fed out from the feeding portion in a strip shape, peeled off in the vicinity of the vacuum driving roller, and fed to the vacuum driving roller.

A second invention is an automatic label joining method in a label applicator for feeding a label wound in a roll into a strip and applying the label to an article.
A first label supply unit that winds the first label in a roll shape and a second label supply unit that winds the second label in a roll shape separately from the first label supply unit are provided. The first or second label can be fed in a strip shape from any of the label supply units and can be supplied to the label joint portion, and the first label or the second label can be supplied at the label joint portion. Hold, match each end, and apply the splicing label sucked and supplied by the vacuum drive roller to the transfer of the first label and the second label, and apply it across this end. By doing so, the first label and the second label are joined together, which is an automatic label joining method in a label sticking machine.

In the label automatic joining device and the label automatic joining method in the label sticking machine according to the present invention,
A first label supply section of the first label roll and a second label supply section in the form of a second label roll are provided, and at the label joint section, the first label or the second label supply section is provided.
Temporarily hold the label of No. 1, match each end, and attach the joint label to this end to
Since the label and the second label are automatically joined, when one label supply unit runs out of label, the label can be supplied in a strip shape from the other label supply unit, and the label can be attached. The machine does not run out of label rolls. Therefore, it is not necessary to stop the label sticking machine and the conveyor even when the label is replaced, and the label sticking work can be efficiently performed, which contributes to improvement in workability and cost reduction.

According to the first aspect of the invention, the label splicing portion has an upstream drive roller that cooperates with the upstream label holding roller and a vacuum drive roller that cooperates with the downstream label holding roller and sucks the splicing label. , First
Since the end detection sensor, the second end detection sensor, the joint end detection sensor, etc. are provided,
The ends of the label and the second label can be aligned and joined together in accordance with the transfer of the second label.

According to the second aspect of the invention, in particular, the label joint portion holds the first label or the second label and aligns their respective ends to align the transfer of the first label and the second label. Moreover, since the first label and the second label are joined by sticking the splicing label across this end, it is necessary to effectively stop the first label or the second label. Without, automatic splicing operation can be performed efficiently.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an automatic label joining device 20 in a label sticking machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 together with an automatic label joining method. However, the same parts as those in FIGS. 9 and 10 are designated by the same reference numerals, and the detailed description thereof will be omitted. Figure 1
FIG. 3 is a side view of the automatic label splicing device 20, wherein the automatic label splicing device 20 includes a first label supply unit 21, a second label supply unit 22, a label splicing unit 23, and a splicing label supply unit 24. And a label slackening unit 25.

The first label supply section 21 winds the first label 2 (hereinafter referred to as "first label L1") in a roll shape. The second label supply unit 22 is provided at a position different from that of the first label supply unit 21, and the second label 2
(Hereinafter, referred to as "second label L2") is wound into a roll. From either of the label supply units 21 and 22, the first label L1 or the second label L2 is connected to the label joining unit 2
3 can be supplied.

The label splicing section 23 does not operate when the label sticking machine 1 is operating normally, and simply allows the first label L1 or the second label L2 to pass therethrough. Label L1 or second label L2
When there are no more, these are held and their ends are aligned and joined by a joint label L3 (described later). The label joint portion 23 includes a first end detection sensor 26 and a second end detection sensor 27.
And a first upstream label tension holding roller 28 and a second upstream label tension holding roller 29.
An upstream label holding roller 30 and a downstream label holding roller 31, an upstream drive roller 32 and a vacuum drive roller 33, a joint end detection sensor 34, and a downstream label tension holding roller 35.
And a guide roller 36, and the label 2 (first label L1 or second label L
2) can be guided to the label slackening unit 25.

The first end detection sensor 26 can detect the end portion of the first label L1, and the first label L1 or the second label L2 by the downstream label holding roller 31 and the vacuum drive roller 33. It outputs a signal that enables pinching. The second end detection sensor 27 is capable of detecting the end portion of the second label L2, and holds the first label L1 or the second label L2 by the downstream label holding roller 31 and the vacuum drive roller 33. Output the signal that enables it.

The first upstream label tension holding roller 28 has a one-way clutch that allows the first label L1 to rotate only in the transfer direction. The first label L1 holds the first label L1 and holds the downstream label tension. The necessary tension is applied to the first label L1 in cooperation with the sandwiching by the holding roller 35 to prevent the first label L1 from loosening in the label joint portion 23. The second upstream label tension holding roller 29 has a one-way clutch that allows rotation of the second label L2 only in the transfer direction, holds the second label L2, and holds the downstream label tension holding roller 35. Second in cooperation with pinching by
The necessary tension is applied to the label L2 to prevent the first label L1 from loosening in the label joint portion 23.

The upstream label holding roller 30 is a driven roller which freely rotates, and reciprocally drives the upstream label holding roller 30 so as to come into contact with and separate from the first label L1 or the second label L2 by the upstream cylinder 37, and at the same time, upstream. It is possible to temporarily hold the first label L1 or the second label L2 in cooperation with the side driving roller 32 and transfer the first label L1 or the second label L2 in the downstream direction. The downstream label holding roller 31 is a driven roller that freely rotates, and reciprocally drives the downstream label 38 so as to come into contact with and separate from the first label L1 or the second label L2, and also the vacuum drive roller 33. In cooperation with the first label L1 or the second label
It is possible to temporarily hold the label L2 of No. 1 and transfer it to the downstream direction.

The upstream drive roller 32 has the end portion of the first label L1 and the front end portion of the second label L2 (or the front end portion of the first label L1 and the end portion of the second label L2) attached to each other. The second label L2 or the first label L1 is fed to the label joining portion 39 to be formed. The vacuum drive roller 33 sucks the splicing label L3 supplied from the splicing label supply unit 24 to splice the first label L1 and the second label L2, and supplies the suction label L3 to the label joining unit 39.

The joint end detecting sensor 34 has its detecting portion at the label joint 39. That is, the joint end detection sensor 34 detects the positions of the ends of the first label L1 and the second label L2 in the label joint 39, and either the first label L1 or the second label L2. One of the end portions can be detected, and by the output of this detection signal, the upstream label holding roller 30 and the upstream drive roller 32 start nipping and transferring the first label L1 or the second label L2, and vacuum drive. Label L for splicing with roller 33
It is possible to start suction of No. 3 and start driving of the splicing label supply unit 24.

Downstream label tension holding roller 35
Has a one-way clutch that allows the bonded label 2 to rotate only in the transfer direction, and cooperates with the first upstream label tension holding roller 28 or the second upstream label tension holding roller 29, Tension is applied to the first label L1 and the second label L2 that are joined at the label joint portion 23, and the first label L1 and the second label L2 are attached at the label joint portion 23.
Do not sag.

The splicing label supply unit 24 includes a splicing label L3 supply unit 40, a splicing label peeling plate 41 provided in the vicinity of the vacuum drive roller 33, and a mount winding unit 4.
2 and a label positioning sensor 43.

The construction of the splicing label L3 is substantially the same as that of the label 2 shown in FIG. 10, except that the vacuum driving roller 3 is arranged so that the adhesive surface on the back surface thereof faces the label joining portion 39.
It has a length and a size necessary for connecting the first label L1 and the second label L2 while being sucked by the peripheral surface of the third label L3. That is, the pitch of the splicing label L3 is determined according to the distance between the label positioning sensor 43 and the vacuum drive roller 33, and the required length across the first label L1 and the second label L2.

By rotating the mount winding unit 42, only the mount 9 of the joint label L3 is reversed by the joint label peeling plate 41, and the joint label L3 can be supplied to the vacuum drive roller 33. By the suction and rotation by the drive roller 33, the label bonding portion 39
The joint label L3 is transferred to the portion.

The label slackening unit 25 loosens the joined band-shaped label by a predetermined length while maintaining a predetermined tension, and the label peeling unit also performs the automatic joining operation in the label joint unit 23. 6 and label attaching part 7 (FIG. 9)
Label 2 (first label L1 or second label L
The purpose is to allow a sufficient time to supply 2) continuously. That is, the label slackening unit 25 includes a swing plate 44, a swing shaft 45 of the swing plate 44, a plurality of (two) looseness imparting rollers 46 rotatably attached to the swing plate 44, and a looseness. A plurality of (3) slack imparting rollers 47 rotatably attached separately from the imparting roller 46,
Have.

Label 2 upstream (label joint portion 23 side)
If a tension that pulls on the
4 rotates in the counterclockwise direction in the figure around the swing shaft 45 to allow the required length to be extended to the label peeling section 6 side, and when this tension is released, the swing plate 44 loses its own weight. To rotate clockwise. The label 2 extends from the label slackening unit 25 to the label peeling unit 6 (FIG. 9).

FIG. 2 shows a label 2 (first
2 is a plan view of the label L1 and the second label L2) of FIG. 1, for example, where the joint label L3 is on the back surface of the mount 9 across the terminal end L1E of the first label L1 and the front end L2F of the second label L2 First by joining from
The label L1 and the second label L2 are automatically connected. However, when the end portion L1E of the first label L1 and the front end portion L2F of the second label L2 are brought into close contact with each other, the label piece 10 at each end portion
It is desirable that the pitch Q between the label strips 10 is equal to the normal pitch P between the label strips 10 in other portions, but the label strip 10 is actually controlled by the control using the label position detection sensor 5 in the label sticking machine 1. Since the label is peeled off properly at the label peeling portion 6, there is no particular problem.

An operation of automatically joining the first label L1 and the second label L2 with the joining label L3 in the automatic label joining device 20 having such a structure will be described with reference to FIGS. FIG. 3 is a flowchart of the operation, FIGS. 4 to 8 are side views of the main parts in each state, and FIG. 4 is a side view of the main parts showing a normal operating state of the label sticking machine 1. As shown in FIG. 4, in a state where the first label L1 is fed out in a strip shape from the first label supply unit 21 and the label piece 10 is attached to the article M, the second label L2 is the second upstream side. While being held by the side label tension holding roller 29, the upstream label holding roller 30 is in a standby state. Second label L2
Up to the position shown in FIG. 4 at the time of the previous setting (a position where it can be nipped by the upstream label holding roller 30 and the upstream drive roller 32 and detected by the joint end detection sensor 34). Shall be extended. The upstream label holding roller 30, the downstream label holding roller 31, the upstream drive roller 32, and the vacuum drive roller 33 are in a stopped state and are not specially driven. The vacuum drive roller 33 is also not performing the suction operation.

In step S1 of FIG. 3, assuming that the first label L1 is lost, for example, as shown in FIG. 5, the first end detection sensor 26 has the first label L1.
The end portion L1E of the is detected. At this time, the required tension on the first label L1 is held by the first upstream label tension holding roller 28 and the downstream label tension holding roller 35 in the same manner as during normal operation.

Upon detection by the first end detection sensor 26, the downstream cylinder 38 operates (step S
2) The downstream label holding roller 31 is pressed against the vacuum drive roller 33 with a predetermined pressing force. The vacuum drive roller 33 starts its rotation without starting the suction operation, that is, without sucking the joint label L3. However, the rotation speed of the vacuum drive roller 33 is affected by the pulling in the label sticking machine 1, and therefore is made slightly faster.

In step S3, when the junction end detection sensor 34 detects the end portion L1E of the first label L1 (FIG. 6), the upstream cylinder 37 operates in step S4, and the upstream label holding roller 30 moves upstream. The side drive roller 32 is pressed with a predetermined pressing force.

Next, in step S5, the upstream drive roller 32 starts its rotational drive (FIGS. 6 and 7), the vacuum drive roller 33 starts suction, and the splicing label L3 is sucked by the vacuum drive roller 33. That is, the splicing label L3 is driven by the splicing label supply unit 24 and the splicing label peeling plate 4 is driven.
1, the vacuum drive roller 33 is peeled off.
I will move to the surface of. While the splicing label L3 rotates and moves together with the vacuum drive roller 33 in the label joining portion 39, the first label L1, the second label L2, and the splicing label are provided between the downstream label holding roller 31 and the vacuum drive roller 33. L3 is crimped and the first
The end portion L1E of the label L1 and the front end portion L2F of the second label L2 are joined (FIG. 7). Joint label L3
Can rotate the vacuum drive roller 33 and perform the bonding operation in the label bonding portion 39, so that the bonding operation with the second label L2 can be smoothly performed without stopping the transfer of the first label L1. It can be carried out.

FIG. 8 is a side view of an essential part in a state where the first label L1 and the second label L2 have been joined together, and as shown in FIG. The side drive roller 32 and the vacuum drive roller 33 rotate and suck, and the splicing label supply unit 24 is driven until the label splicing sensor 43 detects the next splicing label L3. Thus, the second label L2 is loaded in the label sticking machine 1 instead of the first label L1, and the label 2 (second label L2) is continuously supplied from the second label supply unit 22. Will be done.

In step S6, it is determined whether label joining has been performed normally. This determination can be performed by detecting the label 2 by the joint end detection sensor 34 or the label positioning sensor 5 (FIG. 9), for example, and an error signal is output in step S7 to output an alarm sound or an alarm display. I do.

If the label splicing operation is normally performed, the upstream side cylinder 37 and the downstream side cylinder 38 are returned to their original positions (FIG. 1) in step S8, the upstream drive roller 32 is rotated, and the vacuum drive roller 3 is rotated.
The rotation and suction of 3 are stopped.

As described above, while the second label L2 is being supplied in the form of a strip instead of the first label L1,
If the first label supply unit 21 can be loaded with a new roll-shaped first label L1 and the second label L2 is exhausted, the first label supply unit 21 outputs the first label L1 in the same manner as described above. Label L1 can be automatically hung on the second label L2.

[0043]

As described above, according to the present invention, the first label supply section and the second label supply section are provided, and suction and suction are performed in the label joint section where the first label and the second label merge. Since the splicing label is automatically joined to the first label and the second label by using the rotating vacuum driving roller, it is necessary to stop the labeling machine and the conveyor for loading or exchanging the label. Therefore, workability and efficiency can be improved, and cost reduction can be expected.

[Brief description of drawings]

FIG. 1 is a side view of an automatic label joining device 20 in a label sticking machine according to an embodiment of the present invention.

FIG. 2 is a plan view of labels 2 (first label L1 and second label L2) that are joined together according to the same embodiment.

FIG. 3 is a flowchart of the same operation.

FIG. 4 is a side view of relevant parts showing a normal operating state of the label sticking machine 1.

FIG. 5 is a side view of essential parts of a state in which the first end detection sensor 26 has detected the end portion L1E of the first label L1.

FIG. 6 is a side view of relevant parts in a state in which the joint end detection sensor 34 detects the end portion L1E of the first label L1.

FIG. 7 is a main part of a state in which the end label L1E of the first label L1 and the front end L2F of the second label L2 are joined while the joint label L3 is rotationally moved together with the vacuum drive roller 33. It is a side view.

FIG. 8 is a side view of essential parts in a state where joining of the first label L1 and the second label L2 has been completed.

FIG. 9 is a schematic side view of a conventional label sticking machine 1.

FIG. 10 is a plan view of the label 2 loaded in the label sticking machine 1.

[Explanation of symbols]

1 Label pasting machine (Fig. 9) 2 Label 3 Label supply section 4 Label guide section 5 Label positioning sensor 6 Label peeling section 7 Label pasting section 8 Mount board winding section 9 Strip mount 10 Label piece 11 Position detection mark 12 Label Peeling plate 13 of peeling unit 6 Peeling roller 14 of label sticking unit 7 Conveyor 15 Printing unit 20 Automatic label splicing device in label sticking machine 1 (embodiment, FIG. 1) 21 First label supply unit 22 Second label supply Section 23 Label splicing section 24 Splicing label supply section 25 Label slack imparting section 26 First end detection sensor 27 Second end detection sensor 28 First upstream label tension holding roller 29 Second upstream label tension holding roller 30 upstream label holding roller 31 downstream label holding roller 32 upstream drive roller 33 bar Cue drive roller 34 Joint end detection sensor 35 Downstream label tension holding roller 36 Guide roller 37 Upstream cylinder 38 Downstream cylinder 39 Label joining section 40 Joint label L3 supply section 41 Joint label peeling plate 42 Mount paper winding section 43 label positioning sensor 44 rocking plate 45 rocking shaft 46 slack imparting roller 47 slack imparting roller M article (FIG. 9) L1 first label (label 2) L1E end portion L2 of first label L1 Label (Label 2) L2F Front end L3 of second label L2 Jointing label Q End end L1E of first label L1 and front end L2F of second label L2 at respective ends when they are fitted closely Pitch between label strips 10 (FIG. 2) P First label L1 and second label L1 Normal pitch between the label piece 10 in the bell L2 (FIG. 2)

Claims (5)

[Claims] 1. An automatic label joining device in a label applicator for feeding a label wound in a roll into a band and applying the label to an article, wherein the first label is wound in a roll. One label supply unit and a second label supply unit that winds a second label in a roll shape separately from the first label supply unit are provided. Alternatively, the second label can be fed in a strip shape and can be supplied to the label joint portion, and the label joint portion can temporarily hold the first or second label on the upstream label holding roller and the downstream label. A holding roller, an upstream drive roller that cooperates with the upstream label holding roller, and a first label and a second roller that cooperate with the downstream label holding roller. And it can be supplied vacuum driven roller a splicing label by suction to take over Le, together can detect the end of the first label,
A first end detection sensor that outputs a signal that enables the first label to be held by the downstream label holding roller and the vacuum drive roller, and the end portion of the second label can be detected.
A second end detection sensor that outputs a signal that enables the downstream label holding roller and the vacuum drive roller to clamp the second label, and either the first label or the second label. A joint end detection sensor that can detect the end of the label and that outputs a signal that enables the upstream label holding roller and the upstream drive roller to clamp the first label or the second label. ,
And a label slack imparting portion that can slacken the joined band-shaped label by a predetermined length on the downstream side of the label joint portion. Automatic joining device. 2. A first upstream label tension holding roller which guides the first label and has a one-way clutch, and a second one which guides the second label and are provided on the upstream side of the label joint portion. A second upstream label tension holding roller having a second label tension holding roller, and a downstream label tension holding roller having a one-way clutch and guiding the joined label on the downstream side of the label joint portion. The automatic label joining device in the label applicator according to claim 1, wherein the roller has a one-way clutch. 3. An upstream cylinder for bringing the upstream label holding roller into contact with and separating from the first or second label, and the downstream label holding roller for the first or second label.
2. The automatic label splicing device in the label applicator according to claim 1, further comprising: a downstream cylinder that comes into contact with and separates from the label. 4. The splicing label is fed from the supply section in a strip shape, peeled off in the vicinity of the vacuum drive roller, and supplied to the vacuum drive roller. Label automatic joining device in the label pasting machine. 5. An automatic label joining method in a label applicator for feeding a label wound in a roll into a band and applying the label to an article, wherein the first label is wound in a roll. One label supply unit and a second label supply unit that winds a second label in a roll shape separately from the first label supply unit are provided. Alternatively, the second label can be fed out in a strip shape and can be supplied to the label joint portion, and at the label joint portion, the first label or the second label can be held and the respective end portions can be aligned to each other to form a vacuum. By joining the splicing label sucked and supplied by the driving roller with the transfer of the first label and the second label, and by applying the splicing over the end portion, Labels automatic joining method in the label sticking machine, characterized in that joining the first label and the second label.