JP2019001546A - Packaging bag and sealing device thereof - Google Patents

Abstract

To provide a packaging bag and a sealing device thereof suitable for printing a use-by date, an expiration date, or the like.SOLUTION: A bag main body A includes: a first heat seal portion 12 formed across a width thereof from one end to the other; a second heat seal portion 13 formed parallel to the first heat seal portion and across the width of the bag main body from one end to the other; and a printing area 14 made up of a non-sealing portion having substantially the same length as the first and second heat seal portions, and formed between the first heat seal portion 12 and the second heat seal portion 13. And the sealing device includes a first row mechanism X for sealing the first heat seal portion 12 and a second row mechanism Y for sealing the second heat seal portion 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag for packaging sweets, medical devices, and the like and sealing the opening, and a sealing device for sealing the opening.

As this type, for example, a sealing device disclosed in Patent Document 1 has been conventionally known.
This conventional sealing device prints information such as the expiration date of food in advance on the mating surface of the heat seal portion corresponding to the mouth portion of the packaging bag, and then heats the mating surface including the printed portion. Sealing is performed so that the information such as the expiration date can be seen through from the heat seal portion.
However, since the high heat of the heat seal acts on the printed portion, there is a problem that printed characters are likely to be blurred or disturbed.

  The conventional packaging bag also has a problem that an optical read signal such as a matrix type two-dimensional code cannot be printed in the opening. This is because it is almost impossible to optically read the matrix type two-dimensional code from above the heat seal portion.

As a solution to such a problem, for example, a packaging bag shown in FIG. 7 can be considered. The packaging bag shown in FIG. 7 has a heat seal portion 2 formed of a concavo-convex row group in the opening 1 of the bag body a. The heat seal portion 2 is formed across both ends in the width direction of the opening 1 along the opening edge of the opening 1.
A flat print area 3 is formed at a predetermined portion in the area of the heat seal portion 2.

When the opening 1 of the bag body a filled with contents is sealed, the flat printing area 3 in the process of carrying the bag body a after filling the contents via a conveying means such as a belt conveyor (not shown). Is to be formed.
However, when the printing area 3 is formed in the conveying process as described above, the opening 1 of the bag body a is stopped at a position corresponding to a predetermined heat sealing mechanism (not shown), and the stopped state is maintained to heat the bag. At the same time as sealing, a flat print area 3 is formed.

The heat seal mechanism sandwiches the opening 1 of the bag main body a having been packed with the contents between a pair of heaters having corrugated teeth formed on the opposing surface, and heat-presses the heater. A recess corresponding to the printing area 3 is formed, and the teeth are not pressed against the position corresponding to the recess.
Therefore, the printing area 3 corresponding to the concave portion is formed at a predetermined location of the heat seal portion 2 formed of the concave / convex row group.

And while stopping the bag main body a in the position corresponding to the said heat seal mechanism, the said heat seal part 2 and the flat printing area 3 are formed simultaneously in the stop position.
When the print area 3 is formed as described above, the bag body a is transported, and predetermined information is printed on the print area 3 by a printer (not shown) provided on the downstream side in the transport direction.

JP 2004-268925 A

  Since the conventional packaging bag shown in FIG. 7 forms a partially flat print area 3 in the heat seal portion 2, when printing information on the print area 3, the print area 3 and The relative position to the printer not shown must be determined accurately. Therefore, there is a problem that it is difficult to match the relative positions of the two.

  Furthermore, since the printing area 3 is formed in a narrow range within the area of the heat seal portion 2, the area cannot be increased. For this reason, there is a problem that the amount of information to be printed in the print area 3 must be reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging bag and a sealing device thereof that can improve the efficiency of formation of a printing area and printing processing, and can take a sufficiently large printing area.

  The packaging bag according to the first aspect of the invention is a bag that is previously closed except for the opening of the bag body. The packaging bag thus configured, for example, seals the opening after filling with contents such as sweets and medical tools, but extends to the widthwise end of the bag body along the opening edge of the opening. A heat seal portion is formed.

The heat seal part is composed of a first heat seal part and a second heat seal part, and these first and second heat seal parts are provided parallel to each other, and between the first and second heat seal parts, Although the non-seal part of the same length as those of the first and second heat seal parts is formed, this non-seal part becomes a printing area.
Therefore, the non-seal portion is formed over both ends in the width direction of the bag body, and as a result, the printing area is formed long in the width direction of the bag body.

  The packaging bag of 2nd invention has the characteristics in the unevenness | corrugation group being formed in any one or both of the said 1st heat seal part or the 2nd heat seal part.

The sealing device of the third invention is a device for sealing the opening of the packaging bag of the first invention.
Then, a conveying means for conveying the bag main body filled with the contents and a portion of the first seal line width where the first heat seal portion of the bag main body conveyed by the conveying means is formed are heated. The first heat sealing means for sealing and the second heat seal width portion where the second heat seal portion of the bag main body conveyed by the conveying means is sandwiched and heat sealed, and the first heat A second heat sealing means provided in parallel with a gap corresponding to the printing area is provided, and a printer provided at a position corresponding to the printing area and for printing in the printing area. ing.

As described above, the first and second heat sealing means are aligned on the first and second seal line widths, and the pair of first and second seal line widths are parallel to each other while maintaining an interval corresponding to the print area. Therefore, an interval corresponding to the print area composed of the non-seal portion is maintained between the first and second seal line widths.
In the third aspect of the present invention, the first and second heat sealing means are not limited in configuration as long as they can be heated and pressed to such an extent that the opening of the bag body can be sandwiched and the opening can be heat sealed. For example, the structure which contacts the opening part of the bag main body which moves while rotating like a roller, and may transmit heat may be sufficient, and the member which pinches and heats the bag main body which has stopped may be sufficient.

  According to a fourth invention based on the third invention, the first heat seal member corresponds to the first seal line width portion, and a pair of upper and lower first seal belts spanned between pulleys, The first seal belt comprises a pair of first heaters that are slidably opposed to each other when the first seal belt is running, and the second heat seal means corresponds to the portion of the second seal line width, and A pair of upper and lower second seal belts spanned between pulleys, and when the second seal belt is running, the second seal belt is in sliding contact with the second seal belt so as to be opposed to the upper and lower sides of the second seal belt. And a pair of second heaters provided at intervals corresponding to the print area. The heat of the first and second heaters is transmitted to the first and second seal line width portions via the first and second seal belts, and the first and second seal line width portions are sealed.

  The fifth invention is based on the fourth invention, and is provided on the downstream side in the transport direction with respect to the first heater, and the first seal line width portion is pressure-bonded to the first heat seal portion so as to be uneven. And a pair of upper and lower first press rollers for forming the second heater and the second heater on the downstream side in the transport direction, and crimps the second seal line width part to the second heat seal part. One or both of a pair of upper and lower second pressure rollers for forming a group are provided.

6th invention presupposes 3rd invention, and the said 1st heat seal means has the length more than the width direction length of the opening part of the said bag main body, and the width | variety equivalent to the said 1st seal line width. A pair of upper and lower first heat seal members, wherein the second heat seal means has a length equal to or greater than the width direction length of the opening of the bag body and a width equivalent to the second seal line width. The first and second heat seal members are arranged at intervals corresponding to the print area, and the first and second heat seal members are the first and second heat seal members, respectively. The portion corresponding to the heat seal portion is sandwiched and sealed.
In the seventh invention, an unevenness group is formed on one or both of the facing surfaces of the pair of first heat seal members of the sixth invention and the facing surfaces of the pair of second heat seal members. .

According to the packaging bag of the present invention, the non-seal part is formed between the first and second heat seal parts extending to the width direction end of the bag body along the opening edge of the opening of the bag body. Since the portion is used as a printing area, character information, symbols such as a matrix type two-dimensional code, symbols, and the like can be printed on almost the entire width of the opening of the bag body.
As described above, since the printing area has a size corresponding to the entire width of the opening of the bag body, it is easy to align the printer that prints character information and the like in this printing area, and the efficiency of the printing process is improved. .

  In addition, since the first and second heat seal portions are formed on both sides of the print area, foreign matter enters the print area from the outside of the bag body, or a piece of product enters the bag body. There is nothing. If foreign matter enters the print area, the surface of the print area may become uneven, making it impossible to print cleanly or making it difficult to see the printed information. There is no such thing.

  According to the second invention, at least one of the first and second heat seal portions has a stronger pressing force when the concavo-convex group is formed. Therefore, the seal strength of the heat seal part in which the unevenness group is formed can be kept higher than that of the flat heat seal part.

  According to the 3rd to 7th sealing devices, the above-mentioned printing area which consists of the non-seal part formed between the 1st and 2nd heat seal parts is kept in a non-heating state. That is, the heat of the heater does not act on the printing area. Therefore, the printer for printing in the printing area may be provided either before or after the heater.

If, after printing in the printing area, the part is heat-pressed, the printed characters or the like will disappear or blur due to the influence of heat. Therefore, there is a restriction that the printer must be provided on the downstream side of the heater with respect to the transport direction. However, according to the present invention, the installation location of the printer is not limited as described above.
In this way, since the printing area is not heated, a thermal printer can be used as a printer.For example, unlike printing using printed characters, information to be printed in the printing area is not limited to character information, such as a matrix type two-dimensional code. Various forms of printing such as symbols and designs are possible.

According to the fourth and fifth inventions, the opening of the bag main body can be continuously sealed during the conveyance process of the bag main body, and the non-seal part which is the printing area can also be continuously formed, so that the working efficiency is extremely good. Become. Moreover, even if the width of the bag body is different, the same device can be used.
In particular, according to the fifth aspect, the unevenness group can be formed on either one or both of the first and second heat seal portions to increase the seal strength.

According to the sixth and seventh inventions, the first and second heat seal portions and the print area can be formed at a time by being sandwiched between the pair of upper and lower first and second heat seal members.
In addition, since the first and second heat seal portions are formed by being sandwiched between heat seal members longer than the width of the opening of the bag body, the first and second heat seal portions may be warped. Absent. For example, when the first and second heat seal portions are pressed by the pressure roller, the first and second heat seal portions may be warped in accordance with either the upper or lower roller surface. If the first and second heat seal parts are warped, then when printing is attempted thereafter, the first and second heat seal parts are caught on the printer head, causing a problem that printing cannot be performed successfully. In the present invention, such a problem does not occur.
In particular, in the seventh invention, the seal strength of the first and second heat seal portions can be increased by the unevenness group.

It is a front view of the packaging bag of 1st Embodiment of this invention. It is a schematic plan view of the sealing device of the first embodiment. It is explanatory drawing which showed the relationship between the 1st, 2nd heater and the seal belt which comprise the 1st, 2nd heat seal means of 1st Embodiment. It is the figure which showed the 1st, 2 pressure roller of 1st Embodiment roughly. It is a schematic side view of the sealing device of 2nd Embodiment. It is the schematic of the 1st, 2nd heat seal member of the sealing device of 2nd Embodiment. It is a front view of the conventional packaging bag.

The bag main body A of the packaging bag shown in FIG. 1 has its portions other than the opening 11 closed in advance, and after filling the opening 11 with contents such as food and medical tools, the opening 11 is opened. It is to be sealed.
And in the said opening part 11, the 1st heat seal part 12 which consists of a linear uneven | corrugated group along the opening edge is formed over the edge part of the width direction of the bag main body A. As shown in FIG.

In addition, the second heat seal portion 13 is formed in parallel with the first heat seal portion 12 and is formed of a linear uneven group. The second heat seal portion 13 is an end of the bag body A in the width direction. It is formed between the parts.
The flat print area 14 is formed of a non-sealed portion having the same length as that of the first and second heat seal portions 12 and 13 while maintaining a gap between the first and second heat seal portions 12 and 13. Is formed. This print area 14 is formed while maintaining a non-heat-bonded state.

Next, the sealing device of 1st Embodiment for sealing the said packaging bag is demonstrated based on FIGS.
As shown in FIG. 2, the first row mechanism X corresponding to the first heat seal portion 12 and the second row mechanism corresponding to the second heat seal portion 13 are provided on one side surface in the width direction of the belt conveyor 15. Y is provided.
The width direction of the belt conveyor 15 is a direction orthogonal to the moving direction of the belt conveyor 15 indicated by an arrow 16 in the drawing.

The elements of the first row mechanism X are provided in two upper and lower rows, and the upper row is in the order of the driven pulley 17, the first heater 18, and the cooling blower 19 in order from the upstream side to the downstream side in the direction of the arrow 16 shown in the figure. The drive pulley 20 and the first pressure roller 21 are included.
The lower row includes a driven pulley (not shown), a first heater 22 (see FIG. 3), a cooling fan (not shown), a driving pulley (not shown), and a first pressure roller 23. (See FIG. 4).

The elements of the second row mechanism Y are provided in two upper and lower rows, and the upper row in order from the upstream side to the downstream side in the direction of the arrow 16 in the drawing, the driven pulley 24, the second heater 25, and the cooling fan 26. , Comprising a driving pulley 27 and a second pressure roller 28.
The lower row includes a driven pulley (not shown), a second heater 29 (see FIG. 3), a cooling fan (not shown), a driving pulley (not shown), and a second pressure roller 30. (See FIG. 4).

The upper and lower two rows of the same elements of the first row mechanism X are provided facing each other in the vertical direction. Similarly, the upper and lower two rows of the same elements of the second row mechanism Y are provided facing each other in the vertical direction. Yes.
Further, the same elements of the first row mechanism X and the second row mechanism Y are provided at the same position in the direction of the arrow 16 so that they are opposed to each other on a plane.

In each of the first and second pressure-bonding rollers 21, 23, 28, and 30, an uneven group corresponding to the uneven group of the first and second heat seal portions 12 and 13 of the bag body A is formed. The group rotates while meshing with each other.
The driven pulleys 17 and 24 in the upper row, the driving pulleys 20 and 27, and the driven pulleys in the lower row (not shown) and the driving pulleys rotate coaxially.
In addition, the first press roller 21 and the second press roller 28 in the upper row, and the first press roller 23 and the second press roller 30 in the lower row rotate coaxially.

  The driven pulley and the driving pulley in the lower row (not shown) that are opposed to each other in the vertical direction between the driven pulley 17 in the upper row and the driving pulley 20 in the upper row of the first row mechanism X as described above. As shown in FIG. 3, the first seal belt 31 in the upper row and the first seal belt 32 in the lower row are hung in parallel.

  Further, between the driven pulley 24 and the driving pulley 27 in the upper row of the second row mechanism Y, and between the driven pulley and the driving pulley in the lower row (not shown) facing the both pulleys in the vertical direction, As shown in FIG. 3, the second seal belt 33 and the second seal belt 34 are hung in parallel.

  As shown in FIG. 3, each of the seal belts 31 to 34 that are hung in parallel as described above is configured such that one side that is hung in parallel is sandwiched between the first and second heaters and is in sliding contact. Moreover, at least the first and second heaters 18 and 25 in the upper row are pressed against the first and second heaters 22 and 29 in the lower row by the spring force of the spring 35, as shown in FIG. .

Therefore, between the first and second heaters 18 and 25 and the first and second heaters 22 and 29, as shown in FIG. 3, the first and second seal belts 31 and 33 in the upper row and the first and second seal belts 31 and 33 in the lower row are arranged. The first and second seal belts 32 and 34 pass through the first heaters 18 and 22 and the second heaters 25 and 29 while sliding.
Each of the first and second seal belts 31 to 34 as described above is made of stainless steel having a high thermal conductivity or a heat resistant resin material such as a fluorine resin on the surface.

  Furthermore, the pair of drive pulleys 20 and 27 in the upper row and the pair of drive pulleys in the lower row (not shown) are the driven pulleys 36 and 37 in the upper row and the lower row (not shown) provided at the most downstream in the arrow 16 direction. The pair of driven pulleys in the side row are linked via the upper timing belts 38 and 39 and the lower timing belts 40 and 41 (see FIG. 4). Therefore, when the timing belts 38 to 41 travel, the first and second pressure rollers 21 and 23 and the second pressure rollers 28 and 30 are rotated.

The first and second row mechanisms X and Y as described above have the first and second seal line widths 42 and 43 corresponding to the first and second heat seal portions 12 and 13 formed in the bag body A to be conveyed. All are aligned on the extension line.
That is, the distance L1 between the first heaters 18 and 22 and the second heaters 25 and 29 and the distance L2 between the first pressure rollers 21 and 23 and the second pressure rollers 28 and 30 are the print area 14 of the bag body A. This corresponds to the width of.

Further, a printer capable of continuous printing in the printing area 14 of the traveling bag body A between the first pressure roller 21, 23, the second pressure roller 28, 30 and the driven pulleys 36, 37, etc. 44 is provided.
The printer 44 in this embodiment may be on the upstream side of the heater.

Next, a process for sealing the opening 11 of the bag body A will be described.
First, the first and second seal line widths 42 and 43 corresponding to the first and second heat seal portions 12 and 13 of the bag body A are set on the extended lines of the first row mechanism X and the second row mechanism Y. .
Then, the first seal line width 42 portion of the bag body A is sandwiched between the first seal belts 31 and 32, and the second seal line width 43 portion is sandwiched between the second seal belts 33 and 34.

If the drive pulleys 20 and 27 in the upper row and the drive pulley in the lower row (not shown) are rotated with the first and second seal line widths 42 and 43 of the bag body A sandwiched as described above, The bag body A is conveyed in the direction of arrow 16.
When the portion of the first seal line width 42 reaches a position corresponding to between the first heaters 18 and 22, and the portion of the second seal line width 43 reaches a position corresponding to between the second heaters 25 and 29. As shown in FIG. 3, the first heaters 18 and 22 heat the first seal line width 42 through the first seal belts 31 and 32, and the second heaters 25 and 29 are the second seal belts 33 and 32, respectively. The part of the second seal line width 43 is heated via 34.

  When the first and second seal line widths 42 and 43 are heated as described above, the pressure contact force of the first heaters 18 and 22 and the second heaters 25 and 29 caused by the spring force of the spring 35 is changed to the first and second seal lines. Since it acts on the seal line widths 42 and 43, the first and second seal line widths 42 and 43 are bonded.

In the first embodiment, a pair of upper and lower first seal belts 31 and 32 corresponding to the portion of the first seal line 42, and a pair of upper and lower first heaters 18 that are in sliding contact with the first seal belts 31 and 32, 22 constitutes the first heat sealing means of the present invention.
Further, a pair of upper and lower second seal belts 33 and 34 corresponding to the portion of the second seal line 43 and a pair of upper and lower second heaters 25 and 29 slidably contacting these second seal belts 33 and 34, The second heat sealing means of the invention is configured.

  As described above, after the first and second seal line widths 42 and 43 are sealed by the first heaters 18 and 22 and the second heaters 25 and 29, the first and second seal line widths 42 and 43 are cooled. The air is cooled slightly by the blowers 19 and 26 and introduced between the first pressure rollers 21 and 23 and the second pressure rollers 28 and 30.

  If the first seal line width 42 is introduced between the first press rollers 21 and 23 and the second seal line width 43 is introduced between the second press rollers 28 and 30, these first and second seal line widths 42, 43 is more strongly pressure-bonded by the residual heat of the first and second heaters 18, 22, 25, and 29.

The portions of the first and second seal line widths 42 and 43 pressure-bonded by the first and second heaters 18, 22, 25 and 29 as described above are further pressurized by the first and second pressure-bonding rollers 21, 23, 28 and 30. The reason for wearing is to form the first and second heat seal portions 12 and 13 made of the uneven group. Since the first and second heat seal portions 12 and 13 formed in this way have a larger adhesion area by the unevenness group, the seal strength is further increased.
In addition, the form of the said uneven | corrugated group is not restricted to the linear unevenness | corrugation extended in the length direction of a 1st, 2 heat seal part like this 1st Embodiment. Various forms such as lattices and dots can be used as long as they are formed with concavities and convexities that engage with each other provided on the surfaces of the upper and lower pressure rollers.

  The bag body A in which the first and second heat seal parts 12 and 13 are formed is further conveyed in the direction of the arrow 16 to reach the position of the printer 44, and the expiration date, the expiration date, etc. are printed. The print information may be a character, a figure, or a symbol such as a matrix type two-dimensional code.

In the sealing device according to the first embodiment as described above, the first and second heat seal portions 12 and 13 and the printing area 14 between the first and second heat seal portions 12 and 13 are continuously formed on the bag body A. The working efficiency can be dramatically improved.
Moreover, if the printer 44 capable of continuously printing on the printing area 14 of the bag body A to be transported is used, it is not necessary to stop the transport of the bag body A during the sealing operation. Work efficiency is improved.

The belt conveyor 15, the first seal belts 31 and 32, and the second seal belts 33 and 34 constitute the conveying means of the present invention.
Further, in the packaging bag A, the first and second heat seal portions 12 and 13 do not need to be provided with a concave and convex group, and only one of the first and second heat seal portions 12 and 13 has a concave and convex group. May be formed.
When any one of the first and second heat seal portions 12 and 13 is a flat surface, the corresponding pressure roller among the pressure rollers 21, 23, 28, and 30 of the sealing device is changed to a roller having a smooth surface. Alternatively, the pressure roller itself may be omitted.

The sealing device of the second embodiment shown in FIGS. 5 and 6 is also a device for making the packaging bag shown in FIG. 1, but the configuration of the first and second heat sealing means is different from that of the first embodiment.
In this second embodiment, when the conveyance direction when conveying the bag body A using a conveyor (not shown) which is a conveyance means of the present invention is an arrow 16, the printer 44 and the printing status are inspected in order from the upstream side. A camera 45 and first and second heat sealing members 46, 47, 48 and 49 constituting first and second heat sealing means are provided.
In addition, in FIG. 5, the belt conveyor which conveys the bag main body A shall be provided in the near side of the paper surface.

As shown in FIG. 6, the first heat seal means includes a pair of first heat seal members 46 and 47 that face each other in the vertical direction. Each of the first heat seal members 46 and 47 is a metal member having a length L1 and a width W1, and a heater is provided therein. The length L1 is equal to or greater than the width of the opening 11 of the bag body A shown in FIG. 1, and the width W1 is equal to the first seal line width 42 shown in FIG.
In addition, on the opposing surfaces of the first heat seal members 46 and 47, linear uneven groups that mesh with each other are formed.
The first heat seal members 46 and 47 heat-seal the portion of the opening 11 corresponding to the first heat seal portion 12.

On the other hand, the second heat sealing means is provided with a distance W3 corresponding to the printing area 14 from the first heat sealing members 46 and 47, which are the first heat sealing means, and is a pair of second heats that are vertically opposed to each other. It consists of seal members 48 and 49. Each of these second heat seal members 48 and 49 is a metal member having a length L2 and a width W2, and a heater is provided therein. The length L2 is equal to or longer than the width of the opening 11 of the bag body A shown in FIG. 1, and the width W2 is equivalent to the second seal line width 43 shown in FIG.
In addition, on the opposing surfaces of the second heat seal members 48 and 49, linear uneven groups that mesh with each other are formed.
And these 2nd heat seal members 48 and 49 heat-seal the part corresponding to the 2nd heat seal part 13 of the said opening part 11. As shown in FIG.

In FIG. 6, the first and second heat seal members 46, 47, 48, and 49 are shown as separate rod-shaped members, but the upper first and second heat seal members 46 and 48, and the lower first heat seal members 46 and 48, The 1, 2 heat seal members 47 and 49 may be integrally supported, or may be integrated via a connecting portion (not shown). In any case, the pair of first heat seal members 46 and 47 and the pair of second heat seal members 48 and 49 are configured to sandwich the opening 11 of the bag main body A simultaneously or substantially simultaneously.
If the first and second heat seal members 46, 47, 48, and 49 are heat-sealed with the opening 11 of the bag body A interposed therebetween, the first and second heat seal portions 12 and 13 shown in FIG. And the print area 14 are formed simultaneously.

The process of sealing the bag body A with the sealing device of the second embodiment is as follows.
On the upstream side along the arrow 16, various information such as the expiration date is printed by the printer 44 on the portion corresponding to the printing area 14 of the bag body A, and the printing status is confirmed by the camera 45. The opening 11 can be sealed with the two heat seal members 46, 47, 48 and 49. The camera 45 is for confirming the printing status, and the captured image is recorded by a computer (not shown). The captured image may be checked by a computer, and if the printing is unclear or the printed information is incorrect, the conveyance of the packaging bag A may be stopped.

Also in the second embodiment, since the printing area 14 which is a non-sealing part is formed between the first heat sealing part 12 and the second heat sealing part 13 formed in the bag body A, the printer 44 is Even if it is provided on the upstream side of the first and second heat seal members 46, 47, 48, 49 along the conveying direction of the bag body A, the characters printed in the print area 14 are blurred due to the action of heat. There is no such thing.
However, the printer 44 may be provided on the downstream side of the first and second heat seal members 46, 47, 48, and 49.

In addition, since the print area 14 extends over the entire width of the opening 11 of the bag body A, the amount of information to be printed can be increased, and the positioning between the printer 44 and the print area 14 is required to have a very high accuracy. Not.
In the second embodiment, at the positions corresponding to the first and second heat seal members 46, 47, 48, 49, the conveyance of the bag body A is stopped and the entire width of the opening 11 of the bag body A is once. Therefore, it is difficult for the seal strength to partially vary in the first and second heat seal portions 12 and 13.

Moreover, since the structure which clamps the bag main body A with a roller is not used in 2nd Embodiment, the 1st, 2nd heat seal parts 12 and 13 do not warp by the outer peripheral shape of a roller. If printing is performed after heat sealing, if the first and second heat sealing portions 12 and 13 are warped, the warped ends may collide with the printer head and the printing position may be shifted. Although this occurs, such a problem does not occur in the second embodiment, so that the degree of freedom of the installation position of the printer 44 is maintained.
However, when the width of the bag body A is frequently changed or when continuous processing is required, the apparatus of the first embodiment using a belt or a roller is more advantageous.

Note that the unevenness group formed on the opposing surfaces of the first heat seal members 46 and 47 and the second heat seal members 48 and 49 is not limited to a linear shape, and the unevenness group may be omitted in the first embodiment. It is the same.
However, if an uneven group is formed in any of the first and second heat seal portions 12 and 13, the seal strength can be increased as compared with a flat heat seal portion.
The material of the first and second heat seal members is not limited to metal. A resin or the like may be used as long as heat resistance and rigidity are satisfied. For example, the first and second heat seal members can be constituted by rod-shaped members in which heating wires are covered with a heat-resistant resin.

  In addition, the bag body whose opening is heat-sealed by the sealing device of the first and second embodiments may have any form as long as the portion other than the opening for filling the product is closed in advance. . For example, two sheets are stacked and the surrounding three sides are sealed in advance, one side of a cylindrical member is sealed, one sheet is folded and two sides other than the opening are sealed Any of these may be used.

  It is ideal for applications such as printing expiration dates on food packaging bags.

A ... bag body, 11 ... opening, 12 ... first heat seal part, 13 ... second heat seal part, 14 ... printing area, 18, 22 ... first heater, 21, 23 ... first press roller, 25, 29 ... 2nd heater, 28, 30 ... 2nd press roller, 31, 32 ... 1st seal belt, 33, 34 ... 2nd seal belt, 42 ... 1st seal line width, 43 ... 2nd seal line width, 44 ... printer, 45 ... camera, 46, 47 ... first heat seal member, 48, 49 ... second heat seal member, L1, L2 ... length of first, second heat seal member, W1, W2 ... first, second, Width of heat seal member, W3... Interval between first and second heat seal members

Claims (7)

A packaging bag that is pre-closed except for the opening of the bag body,
In the opening,
A first heat seal portion formed along the opening edge of the opening and across the widthwise ends of the bag body;
A second heat seal portion formed in parallel with the first heat seal portion and formed across both ends of the bag body in the width direction;
Between the first heat seal part and the second heat seal part, a non-seal part formed with substantially the same length as the first and second heat seal parts is provided,
A packaging bag having the non-sealed portion as a printing area.   The packaging bag according to claim 1, wherein a concavo-convex group is formed on one or both of the first heat seal part and the second heat seal part. A packaging bag sealing device according to claim 1,
Conveying means for conveying the bag body filled with contents;
First heat sealing means for sandwiching and heat-sealing a portion of the first seal line width in which the first heat seal portion of the bag body conveyed by the conveying means is formed;
While sandwiching and heat-sealing the second seal line width portion where the second heat seal portion of the bag body conveyed by the conveyance means is formed, the portion corresponding to the first heat seal means and the printing area A second heat sealing means provided in parallel at a distance;
A packaging bag sealing device provided at a position corresponding to the printing area and provided with a printer for printing in the printing area. The first heat sealing means includes
A pair of upper and lower first seal belts corresponding to the portion of the first seal line width and spanned between the pulleys, and a pair of slidingly opposed to the upper and lower sides of the first seal belt when the first seal belt is running. The first heater of
The second heat sealing means corresponds to the portion of the second seal line width, and a pair of upper and lower second seal belts spanned between the pulleys, and the second seal belt of the second seal belt when the second seal belt is running. The first seal and a pair of second heaters provided at a distance corresponding to the print area while sliding in opposition to the top and bottom of the second seal belt during travel,
The heat of the first and second heaters is transmitted to the first and second seal line width portions via the first and second seal belts, and the first and second seal line width portions are sealed. The sealing device of the packaging bag of Claim 3. A pair of upper and lower first press rollers provided on the downstream side in the transport direction with respect to the first heater, and for pressing the portion of the first seal line width to form a concavo-convex group in the first heat seal portion; ,
A pair of upper and lower second pressing rollers provided on the downstream side in the transport direction with respect to the second heater, and for pressing the portion of the second seal line width to form a concavo-convex group in the second heat seal portion; The packaging bag sealing device according to claim 3 or 4, wherein either or both of the above are provided. The first heat seal means comprises a pair of upper and lower first heat seal members having a length equal to or greater than the width direction length of the opening of the bag body and a width equivalent to the first seal line width,
The second heat seal means comprises a pair of upper and lower second heat seal members having a length equal to or greater than the width direction length of the opening of the bag body and a width equivalent to the second seal line width,
The first and second heat seal members are arranged at intervals corresponding to the print area, and the first and second heat seal members sandwich the portions corresponding to the first and second heat seal portions, respectively. The packaging bag sealing device according to claim 3, wherein the sealing device is configured to be sealed.   For forming a concavo-convex group in the first and second heat seal portions of the bag body on one or both of the opposed surfaces of the pair of first heat seal members and the opposed surfaces of the pair of second heat seal members The packaging bag sealing device according to claim 6, wherein the unevenness group is provided.

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