JP2005516860A - Bag closure assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closing body assembly (1) including a complementary closing body shaped part (2) and a panel (6a, 6b) for fixing the closing body assembly to an inner surface of a bag. Regarding the assembly.
SOLUTION: A sealing band (11, 13) disposed on an outer surface of a fixed panel (6a, 6b), and the panel (6a) formed on one fixed panel (6a) are connected to a first outer portion (61a). And a pre-cut or weakening line (10) in which the sealing band provided on the panel is limited to the outer part, and a sealing band provided on the inner part of at least one panel (dividing into the second inner part (62)) 12), and each inner sealing band is arranged in an inner portion of the fixed panel.

Description

The present invention relates to the field of packaging bags, and in particular to the manufacture of closure assemblies, and more particularly, the manufacture of bags that include tamper-evident closure assemblies.

  Many packaging bags and many systems have been proposed for manufacturing these bags, particularly for securing closure assemblies with tamper detection means to the bags.

  FIG. 1 shows an example of a known closure assembly 1. Complementary shaping 2 for opening and closing the mouth 3 of the bag is included. The complementary shaping part 2 is advantageously opened and closed by a moving slider 4.

  It can also be seen that the means providing the function of revealing the initial protection and opening includes a strip 5 that initially extends across the mouth of the bag and must be broken to access the contents of the bag. 1

  The tampering detection means 5 is known per se, and the user can know whether the bag containing the product has already been opened. With the fixing sheet 6, the complementary shaped part can be fixed to the closure 7 of the bag.

  The sheet 6 is fixed during a welding process in which the fixed sheet is passed between the welding jaws 8.

  Fixing the sheet to the mouth of the bag has not been completely satisfactory, although much research has been done in this very special field.

  Specifically, the fixed sheets must not be welded together and must not be welded to the tamper detection means.

  Thus, it is necessary to provide an intermediate portion 9 between the inner surfaces of the sheets so that the tamper detection means 5 can be correctly positioned or the sheets 6 are not welded together.

  An example of such a known bag is described and illustrated in French Patent 2,778,362.

  The present invention proposes an improved system for securing a sheet to a bag surface.

  In particular, a closed body assembly is proposed in which the tamper detection means is not made of a sheet containing a weak line.

To this end, the present invention provides a closure assembly that includes a complementary closure feature and a securing sheet for securing the closure assembly to the inner surface of the bag.
-Welding strips provided on the outer surface of the fixing sheet,
-A score line or weak line formed on one fixed sheet, the fixed sheet being divided into a first outer part and a second inner part, the outer welding strip provided on the sheet being limited to that outer part; A score line or weakening line, and a welding strip provided on an inner part of at least one of the sheets, each inner welding strip being disposed on an inner part of the stationary sheet, We propose an assembly characterized by having it.

  The invention advantageously comprises the following features, alone or in any technically possible combination thereof.

The outer weld strip of the sheet without score lines extends over the entire width of the sheet;
The outer weld strip of the sheet without score lines extends only over the outer part of the sheet;
The closure feature is a complementary male / female mold;
The closure shaped part includes a movable slider;

  The invention further relates to a bag comprising a closure assembly according to the invention, and a closure assembly and a method and machine for producing a bag comprising these assemblies.

  Other features, objects and advantages of the present invention will become apparent upon reading the following description of exemplary, non-limiting embodiments with reference to the accompanying drawings.

  As mentioned above, the present invention relates to the automatic manufacturing of reclosable assemblies for bags. These bags are provided with a closure assembly including a stationary sheet that forms tamper detection means.

  The present invention can be similarly applied to an automatic bag making machine having a horizontal travel and an automatic bag making machine having a vertical travel.

  Furthermore, the present invention provides an automatic bag making machine in which filling is performed at a location that is geographically remote from the manufacturing site during the process following manufacturing, and a general process in which filling and closing are performed in a single location in a continuous process. The same applies to "Form, Fill, and Seal" (FFS) type manufacturing machines with the English words used in

  Thus, the present invention preferably and advantageously applies to FFS type machines with vertical travel.

  FIG. 2 schematically shows a closure assembly 1 according to the invention.

  Complementary shaped part 2 that can open and close the mouth of the bag is included.

  The complementary shaping part 2 is advantageously opened and closed by a moving slider 4. However, the assembly may not include a slider.

  The complementary closure shaped part 2 is advantageously male / female. However, other types of complementary shaping are also conceivable.

  The fixing sheets 6a and 6b support the shaping part 2 so that these sheets can be fixed to the wall of the bag.

  A weak line or score line 10 parallel to the shaped part is formed on one sheet 6a. The score line 10 extends substantially in the center of the sheet 6a. Thus, the score line 10 divides the sheet 6a into two parts, an outermost first part 61a and an innermost second part 62a with respect to the bag.

  By analogy, in the context of the present application, for the second sheet 6b, the part 61b is called the “outer part” and the part 62b is called the “inner part”.

  In the description herein, the expression “welding strip” includes all of the fixing sheets to the bag wall, for example heat welding, in particular “hot melt” type welding, as well as adhesive bonding, etc. The possibility of being included.

  A welding strip 11 is provided on the outer surface of the outer portion 61a of the sheet 6a, which can fix the sheet 6a to the inner surface of the bag wall.

  On the other hand, no welding strip is provided on the inner surface of the portion 61a. The same applies to the inner surface of the part 61b. Thus, the inner surfaces of the portions 61a and 61b cannot be welded together. According to one variant, the material of the fixing sheet is such that the inner surfaces do not adhere to each other during the welding process. The same results can be obtained by surface treatment processes known to those skilled in the art.

  The inner surface of the part 62b is provided with a welding strip 12, which faces the part 62a with or without a welding strip. Advantageously, the portion 62a is not provided with a strip, which saves welding material and allows the welding to be performed relatively cleanly. Of course, the weld strip can be secured to portion 62a but not 62b. 6 and 7 differ from FIG. 2 only in the placement of the weld strips in the inner portions of the sheets 6a and 6b.

  Thus, portions 62a and 62b can be welded together as the closure assembly passes between the welding shoes.

  The purpose of such welding is to form a tamper-sensitive element that serves to make it clear that the initial opening has been made.

  A welding strip 13 that can fix the sheet 6b to the inner surface of the bag is provided on the outer surface of the sheet 6b.

  FIG. 3 schematically shows the upper part of a bag 20 in which the closure assembly 1 according to the invention is provided in the mouth 3. The fixing of the sheets 6a and 6b takes place during the welding process or the adhesive bonding process in which these sheets 6a and 6b pass between the welding jaws or the coupling jaws 8.

  After welding, the outer surfaces of the sheets 6a and 6b are fixed to the inner surface of the wall 7 of the reclosable bag 20. Similarly, a thermal welding process welds the inner surfaces of portions 62a and 62b together. Therefore, the assembly 1 constitutes a tamper detection type closing body, and the welded portion 12 is hermetically sealed.

  The tamper detection closure can be opened by the score line 10 by the user.

  FIG. 4 schematically shows the function of the opening after the tamper detection device is first opened, ie after the score line 10 has been cut.

  After opening the shaped part by the slider 4, the user applies sufficient force to the sheets 6a and 6b to break the weakening line or score line 10. After the line of weakness or score line 10 is broken, portion 62a remains welded to sheet 6b and portion 61a remains welded to the bag wall.

  Arrow 21 schematically indicates that the user can access the contents of the bag. Therefore, the user can open and close the shaped part 2 as desired.

  Furthermore, the present invention relates to the manufacture of the assembly 1. According to this manufacturing method, the complementary shaping part 2 is welded to the fixing sheets 6a and 6b. Further, the fixing sheets 6a and 6b may be extruded as a single part on the shaping portion.

  In order to clarify the explanation, a scored line or a weakened line 10 is formed on one sheet having the reference numeral 6a.

  A weld strip is then applied to the sheets 6a and 6b.

  The welding strip provided on the outer surface of the sheet extends on the outer part with respect to the score line or weakening line 10 of the sheet 6a and over the entire surface of the sheet 6b.

  A welding strip provided on the inner surface of the sheet extends over the inner part with respect to the score line or weakening line 10 of one or both of the sheets 6a and 6b. No welding strip is provided on the inner surface of the outer part with respect to the score line 10. Advantageously, the welding strip is provided only on the inner part.

  The complementary shaping advantageously includes a movable slider to assist in opening and closing. The slider can be manufactured from metal or plastic.

  The bag wall may be formed of any material such as plastic material, cardboard, or paper.

  The invention further relates to a method for securing a closure assembly to a mouth of a reclosable bag.

  According to this method, the closure assembly is formed to be passed through the mouth of the bag formed by means known per se, and movement takes place between the welding shoes. With the welding shoe, the welding strip can be fixed to the bag wall and the inner parts of the fixing sheet can be welded together.

  The welding of the fixed sheet to the inner surface of the bag wall can be performed simultaneously on the two walls, or after welding the first sheet while performing various operations such as filling the bag, the second sheet is Can be welded.

  A machine for manufacturing a closure assembly includes means that can apply a weld strip to a suitable surface of a stationary sheet. Further included is a means by which a weakening line or score line can be formed on one of the fixed sheets.

  A machine for securing the closure assembly to the bag mouth includes means for threading the closure assembly through the bag mouth level between which the securing assembly can be welded to the closure. These means may in particular be a welding shoe. The moving means may be a length direction moving means or a lateral direction moving means.

  The machine has a bag forming means known per se upstream of the closure.

  Bags can be filled with products at the bag manufacturing site. This can be done, for example, prior to securing the closure assembly.

  After the assembly is secured to the bag mouth, a means can be provided for welding the securing assembly to the wall of the bag where no tamper detection closure is formed if the filling is performed at the same location or at another location. .

  Thus, filling can be performed through the internal space between the fixed sheets.

  These means may include, for example, means disposed between the interior of the stationary sheet during the welding process. In the variant shown in FIG. 5, the welding strips 11 and 13 are applied only to the outer surfaces of the parts 61a and 61b. Thus, only the outer part is first welded. The tamper detection part is formed by welding the parts 62a and 62b after filling the bag.

  The filling of the bag can be performed according to other variants. For example, a fixed sheet can be fixed to the inner surface of one wall of the bag, the bag can be filled with the tamper detection element already formed, and then the other sheet can be fixed to the other wall.

  Thus, filling can be performed from the outside between the bag wall and the fixed sheet.

  Furthermore, filling can be done through the end of the bag opposite the mouth to which the closure assembly is secured.

  The fixing machine may include means for performing a “hot melt” type of welding. In addition, an adhesive bond jaw may be included.

  It must be said that the above explanation does not assume the position of the machine. For example, vertical movement or horizontal movement may be used, and the closure assembly may be fixed in the length direction or in the lateral direction with respect to the movement direction of the packaging foil.

1 is a schematic view of a prior art bag with a closure assembly with a tamper detection sheet provided with a weakening line. FIG. 1 is a schematic view of a closure assembly according to the present invention. FIG. FIG. 3 is a schematic view of a closure assembly disposed at the mouth of a plastic bag. 1 is a schematic view of a closure assembly according to the present invention with a tamper detection element open. FIG. It is the schematic which shows embodiment which fills a packaging bag after fixation of a closure body element. FIG. 3 is a schematic view of a closure assembly in which a fixation strip is provided on an opposite seat compared to the embodiment shown in FIG. FIG. 7 is a schematic view of a closure assembly combining the embodiments of FIGS. 2 and 6.

Claims (19)

In a closure assembly (1) comprising a complementary closure feature (2) and a securing sheet (6a, 6b) for securing the closure assembly to the inner surface of the bag,
Welding strips (11, 13) provided on the outer surface of the fixing sheet (6a, 6b),
A scored line or weakened line (10) formed on one fixed sheet (6a), wherein the fixed sheet (6a) is divided into a first outer part (61a) and a second inner part (62a), and the sheet The outer weld strip provided on the inner portion of the sheet is defined by a scored line or a weakened line (10), and a weld strip (12) provided on an inner portion of at least one of the sheets, An assembly, characterized in that each inner weld strip comprises a weld strip (12) disposed on the inner portion of the fixed sheet.   2. An assembly according to claim 1, wherein the outer weld strip of the sheet (6b) not provided with the score lines extends over the entire width of the sheet.   The assembly according to claim 1 or 2, wherein the outer weld strip of the sheet (6b) not provided with the score line extends only over the outer part (61b) of the sheet (6b). Feature assembly.   4. Assembly according to claim 1, 2 or 3, characterized in that the closure-shaped part (2) is a complementary male / female type.   The assembly according to any one of claims 1 to 4, characterized in that the closed body shaped part (2) comprises a movable slider (4). A bag including a body folded back to itself and a mouth to which a closure assembly including a complementary closure body is secured, and further comprising a securing sheet for securing the closure assembly to the inner wall of the bag;
Welding strips (11, 13) provided on the outer surface of the fixing sheet (6a, 6b),
A scored line or weakened line (10) formed on one fixed sheet (6a), wherein the fixed sheet (6a) is divided into a first outer part (61a) and a second inner part (62a), and the sheet The outer weld strip provided on the inner portion of the sheet is defined by a scored line or a weakened line (10), and a weld strip (12) provided on an inner portion of at least one of the sheets, A bag, characterized in that each inner welding strip comprises a welding strip (12) arranged in the inner part of the fixed sheet.   The bag according to claim 6, characterized in that the outer weld strip of the sheet (6b) not having the score lines extends over the entire width of the sheet.   The bag according to claim 6 or 7, wherein the outer welding strip of the sheet (6b) not provided with the score line extends only over the outer part (61b) of the sheet (6b). Characteristic bag.   9. Bag according to claim 6, 7 or 8, characterized in that the closure-shaped part (2) is a complementary male / female type.   10. Bag according to any one of claims 6 to 9, characterized in that the closed body shaped part (2) comprises a movable slider (4). Closure assembly (1) comprising a complementary closure feature (2) and a securing sheet (6a, 6b) for securing the closure assembly to the inner surface of the bag wall (7). In a method for manufacturing
Forming a scored line or a weakening line (10) in one fixed sheet (6a) that divides the fixed sheet (6a) into a first outer part (61a) and a second inner part (62a);
Applying a welding strip (11, 13) to the outer wall of the fixed sheet (6a, 6b), wherein the outer welding strip provided on the sheet including the weakening line or score line is limited to the outer part of the sheet. And applying a welding strip (12) to the inner wall of at least one of the strips at the inner portion of the fixed sheet.   12. A method according to claim 11, further comprising the step of securing a movable open / close slider to the complementary closure feature (2). A closure body assembly (1) comprising a complementary closure body shape and a method for producing a reclosable bag for securing a fastening sheet for securing the closure assembly to the bag,
Forming two walls (7) defining the mouth (3);
Welding the welding strips (11, 13) on the inner surface of the wall (7) of the bag to the outer surface of the fixed sheet at the mouth level, one of which can be broken when first opened Including a scored line or a weakened line, and the outer weld provided on the sheet is limited to the outer part,
Filling the bag (20) with the product,
Welding the inner surfaces of the sheets (6a, 6b) to each other by means of a welding strip (12) provided on at least one of these sheets, wherein each welding strip inside the sheet is connected to the fixed sheet A method comprising: a step disposed in an inner portion.   14. The method of claim 13, wherein the step of filling the bag is performed prior to securing the closure assembly.   15. A method according to claim 13 or 14, further comprising the step of securing a movable open / close slider (4) to a complementary closure body shape (2).   16. The method of claim 13, 14, or 15, wherein the step of welding the weld strip is a "hot melt" weld type. A closure assembly comprising a complementary closure body shape (2) and a fastening sheet (6a, 6b) for securing the closure assembly to the inner surface of the wall of the bag (20) is manufactured. Machine for
Means for forming a weakening line or score line (10) on one of the fixing sheets, dividing the fixing sheet into a first outer part and a second inner part;
Means capable of applying welding strips (11, 13) to the outer wall of the fixed sheet, wherein the outer welding strip provided on said sheet is limited to its outer part, and means for welding strip (12) to said sheet A means capable of being applied to at least one of the inner wall and the inner portion of the fixed sheet. A reclosable bag comprising means for securing the closure assembly (1) including a complementary closure profile (2) and a securing sheet (6a, 6b) for securing the closure assembly to the bag In a machine for manufacturing (20),
Means capable of forming two walls constituting the mouth (3);
Means capable of welding the welding strips (11, 13) arranged on the outer surface of the fixed sheet to the inner surface of the wall (7) at the level of the mouth, one of the sheets being torn when first opened. Means comprising a scored line or a weakened line, wherein the outer weld provided on the sheet is limited to the outer part;
Means for filling the bag with the product, and the inner surface of the sheet can be welded together by a welding strip provided on at least one of the sheets, each welding strip inside the sheet being an inner part of the fixed sheet Means disposed on the machine.   19. A machine according to claim 18, comprising means capable of performing a "hot melt" weld type welding.

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