JPS6312430A - Method of packaging various product in package made of sheetmaterial and device executing said method and finished package thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for packaging various products in packages made of strip or thin film material, an apparatus for carrying out the method, and the finished package thereof. The products to be packaged can be powdered or individual items such as cigarettes, chocolate bars, fruits, etc. In the following description, the term "thin film material" refers to a heat-weldable plastic film, but the present invention is also applicable to thin paper or metal (aluminum) sheets coated with other materials such as plastic or adhesive on one or both sides. It can also be applied to synthetic materials, etc., and this adhesive, size can be
Activated by pressure, solvent, and can form a joint upon contact. Similarly, tissue paper coated with heat, pressure or solvent activated substances can be used, but only where the bond is to be made.

[Conventional technology]

BACKGROUND OF THE INVENTION As is well known in the packaging field, low-cost products such as powdered detergents are sold in boxes of various sizes and types that greatly influence the final cost of the product.

Therefore, these products are being developed to meet the demands of markets where the supply of box-type packaging materials is low and where the need to supply consumers with very cheap products by significantly reducing the proportion of packaging costs to the final cost. A need has arisen for more economical packaging.

[Problem that the invention seeks to solve]

The technical objective of the present invention is therefore to meet the needs of a particular consumer group by devising a method of achieving cheaper and more productive packaging for products of the above type.

[Means for solving problems]

The purpose is to provide packaging strips located in vertical planes that are connected along the bottom edge and along equidistant transverse lines defining a series of adjacent compartments with openings along the top edge in the longitudinal direction. forming at least one eyelet along each transverse joint line at a predetermined distance near the edge of the opening; , a conveyor is arranged to travel along a closed path of a loop including an arc of circular arc, and the conveyor is provided with a suspension device that engages the eyelet, so that the section is positioned at least along the arc of the path of the conveyor. simultaneously driving adjacent metering means to move along an inner path such that openings in compartments along the arc open; and metering means disposed concentrically along the arc. , packaging various products in a package made of sheet material, comprising the steps of: inserting a certain amount of the product into the compartment along the circular arc through the open opening; and finally closing the compartment. achieved by the method.

In an advantageous embodiment of this method, the bag is partially pIWed at the transverse joint line by a gIW line extending from the bottom edge to the vicinity of the eyelet, thus resulting in a bag that is joined in the area containing the eyelet.

In another advantageous embodiment of this method, the longitudinal section is folded to obtain two sections joined along the bottom edge.
It is formed by folding the packaging strip in half longitudinally. A bellows section is formed along the folded edge and forms a bottom that makes efficient use of the capacity of the bag, which can be held upright when filled.

Another object of the present invention is to provide an apparatus for carrying out the above method, which apparatus is for packaging various products in sheet material packages, the apparatus being joined along the bottom edge. , and means for conveying in a vertical plane a packaging strip comprising two longitudinal sections joined along an equidistant transverse joining line defining a series of adjacent compartments having an opening along the top edge; and means for forming at least one eyelet a predetermined distance along each transverse joining line near the upper edge;
A conveyor moving along a closed path in a loop including a straight section and a circular arc, the conveyor comprising means for suspending a section in the transverse line, the section extending at least along the arc along the path of the conveyor. The conveyor is arranged to move along an inner path of the conveyor so that adjacent suspension means are brought closer together and the openings of the compartments along the arc are opened. It is characterized in that it comprises metering means adapted to insert a quantity of product into the compartment and means for closing the compartment.

The invention also relates to paragauges obtained by the method described above.

Other advantages and features of the invention will be understood from the following description of a preferred embodiment, illustrated by non-limiting example in the accompanying drawings.

〔Example〕

Referring to Figures 2 and 3, the device includes a base 1 comprising two upright members supporting a frame 3 for rotation about a horizontal axis. A spool 4 holding heat-sealable plastic strips for package production is attached to the frame 3.
is rotatably mounted on one side of the The other side of the frame 3 carries a reserve spool 5 from which material is taken when the spool 4 is emptied.

The strip 6 unwound from the spool 4 is guided by a set of compensating rollers 7 to provide a reserve when changing the spool and to compensate for tension variations on the strip resulting from variations in the speed at which the strip is withdrawn, etc. carried by means.

A folding means 8 arranged downstream of the correction roller 7 folds the strip 6 longitudinally along the center, so that the two adjacent longitudinal sections 9.10 thus formed are located in a horizontal plane, but as will be shown later. During the injection process, it is placed in a vertical plane with the folded edge facing down. The means 8 is a so-called bellows type base 11
It is desirable that the design creates the following (see Figure 4).

After leaving the means 8, the strip 6 passes through the guide rollers 12, 13.
, and then to a device 14, where the image parts 9, 10 are joined along a weld line 15 transverse to the direction of travel A of the strip.

As shown in FIG. 5, the transverse weld lines 15 define a pair of adjacent compartments 16, the top edges 17.18 of which provide openings for the introduction of packaging material into the compartments. Part 9,
10 is welded over a height from the base 11 to a predetermined distance from the apex, forming a line 15, thus leaving the two apical edges 17, 1.8 open. . At certain locations, the top edge of the weld line is provided with an enlarged area in which an eyelet 20 is formed by means of perforation means 14a attached to the device 14. In operation, the device 14 transfers the strip to a conveyor 21 that includes a flexible loop 22, such as a strip of steel, wrapped around a pair of large diameter pulleys 23, 24 in a horizontal position. A further guide means 25 arranged between the welding means 14 and the conveyor belt 21 comprises a correction roller 26 arranged to guide the strip 6 in a vertical plane during its progress, as well as a further roller 2
Including 7,28. A plurality of flakets 29 fastened to the loop 22 extend inwardly to form the column 3 with the book 31 at its end.
0 respectively. The block 31 protrudes outward,
The tip is provided with a pin 32 that engages with the small hole 20 and functions as a hanging means.

The strip 6 is suspended from the pin 32 using the small hole 20;
If the compartment 16 does not contain a certain amount of product, it is conveyed under the old amount head 33. But H? Before reaching the bottom of the head 33, the strip 6 is cut at the weld line 15 and becomes an independent bag 34. The cut line extends close to the eyelet 20 so that the series of bags 34 thus created are joined in the expanded area 19.

Rotary blade 3 located between the pulleys 23 and 24 of the strip passage
5 cooperates with the fixed blade 36 on the opposite side to cut the strip 6 at the melting wire J 15.

Before reaching the tubular channel of the metering head 33, the top edge 17.18 is opened in a V-shape by folding means 37 (FIG. 4). The means 37 further include a tongue 38 shaped for bending the inner edge 18 through 90 degrees.

One of the main advantages of the invention is that the vertical plane B along the conveyor path of the bag 34, and more particularly along the annular portion below the metering head 33, is formed by the flexible loop 22. It is retracted inward by 5 with respect to the plane C of . Therefore, as the bag 34 moves along the annular portion, the pins 32 move closer together so that the ff117 bordering the opening at the top of the bag
．． Loosen 18 (see Figure 9). As will become clearer later, the opening is then opened and a quantity of product is inserted into the bag.

If the pitch of the pin 32 in plane C is denoted by p'', while the pitch of the pin 32 in plane B and along the semicircle where the loop 22 is in contact with the pulley 24 is denoted by ``f'', the pitch of the pin 32 in plane C is Because of the inner path, "O go"<"p".

In order to insert the pin 32 into the eyelet 20, the pin is inserted into the loop 22.
It has a length that extends further outward, and the spacing between the small holes 20 is set to be 5 times larger than the spacing between the pins 32.

Special care is required to insert the pin 32 into the eyelet in the strip at the exit of the pulley 23.

In fact, due to working tolerances, the elasticity of the strip, and also the elongation due to tension and traction forces that the strip undergoes, the pitch "d" of the eyelets is subject to large variations, which jeopardizes the engagement of the pin and eyelet.

In order to ensure the above-mentioned engagement, the structure is as follows. When the pin 32 comes to the position where the free tip of the pin touches the strip 6 (the position indicated by the broken line in FIG. 9), the small hole is located downstream in any case, and the relationship "d"<"n□/" is satisfied. However, in this case It, l! , , l) is the distance between the contact point of the pin and the strip 6 and the last eyelet already engaged with the preceding pin, which is y from the center of the pulley 23 in plane B.
It can be easily calculated if [ju ``r'' and the height h'' of the pin from the surface B are known.

During the arc path defined between the above two positions, the pin 32
The tip of the pin has a longer curve than the curve of the eyelet 20, thus allowing the pin to approach the eyelet that precedes it.

However, in order for the pins 32 to approach and engage their respective eyelets, we must also take into account the fact that the pins, which describe an angle 'α', do not push the wrapping strip 6 outwardly from position X to position Y. d
” > ”12. , .

The guide 27a then moves the compartment relative to the block 31, ie along the path inside the loop 22.

In order to facilitate the step of transferring the bag to the pin 32, the passage of the bag 16 is inclined inwards by 5 degrees with respect to the straight portion of the loop 22.

The metering head 33 consists of a plurality of means 39 arranged along its periphery concentric with the pulley 24. The means 39 have the same angular velocity as the pulley 24 and each means 39 along a semi-circular path between the angles D and E where the loop 22 is tangent to the pulley 24 is positioned above each bag carried on the conveyor 21. vertically aligned at .

Each metering means (FIG. 8) includes a frame 40 rotating integrally with a pulley 24, the frame 40 having a dispensing funnel 4 at the bottom.
A drive means 43 carries a vertically movable hopper 41 in which the discharge funnel 42 is adjusted by means of a stationary cam or the like.
It is raised and lowered by

In detail, each metering means remains elevated in the section E to D, while leaving the angular position on the other hand, each hopper 41
descends to engage the respective bag and rises again before reaching position E. In the lowered or bag-engaging position, suitable drive means eject a predetermined amount of product.

The frame 40 has two lower arms 44.45 articulated with a pair of levers 46.47, each lever comprising:
When each metering means is in position above its respective bag, area 1
Both ends of the opening on the bag 9 form grippers that grip the top edge of the bag 34.

The clippers 46,47 have toothed sections each engaging a rank 48,49 which is vertically movable by means of a drive means 50,51. To insert the funnel 42 into the mouth of the descender, an opening means is inserted between the edges 17 and 18, and the opening means is then expanded so that the mouth can receive the funnel 42. The opening means includes two pairs of lugs 52.53, each lug located at the bottom end of a respective pair of levers 54.55. The lever 54.55 is joined above the arm 44.45 to a projection 56.57 from the frame.

The lever 55 has a forwardly projecting extension 58,59;
Its tip connects with a bar 60 driven by means 61.

Link 62 (only one shown in the figure) is connected to lever 5
5 and constitutes a joint between lever 55 and the upper extension of lever 54. As is clear from the foregoing, when the means 61 is actuated, the levers 54, 55 and the lugs 52.53 swing in opposite directions, intruding between the edges 17.18 and then expanding the mouth 34 of the bag.

[For production]

The above device operates as follows.

The strip 6 is unwound from the spool 4 and longitudinally centrally folded by means 8 and guided by a device 14 where the transverse welding is carried out so that the strip 6 can be suspended from the pin 32 of the conveyor 21. A line 15 and an eyelet 20 are formed.

While moving between the pulleys 23, 24, the bag 34 is moved by the blades 35, 36.
Cut using. Directly downstream of the blades 35, 36, the adjacent top edges 17, 18 of the strip are folded into a V-shape by means 38. As described above, the inner edge 18 is folded by the tongue portion 38 by more than 90 degrees.

This extra folding operation allows the two pairs of lugs 52, 53 associated with the various weighing devices to be placed on the weighing head without causing any conflicts that might occur if the inner edge 18 were to remain upright. This is to allow movement between the edges 17, 18 during rotation. It is added that during this stage, the lug remains at the same height as the hopper moves vertically.

When the bag 34 is tangentially engaged with the metering head, under appropriate commands, the grippers 46, 47 subsequently close and grip the bag at the opposite ends of the bag mouth.

Between the position and the diametrically opposite position E, where the strip 6 leaves the metering head, the bag 34 is filled. More specifically, the mouth of the bag is first expanded by the opening actuation of the lugs 52,53, and then the hopper 41 is lowered and enters the bag from above.

The expansion of the mouth of the bag is not due to the elasticity of the material, but because the inner path followed by the bag 34 is shorter than the outer path of the loop 22 of the conveyor 21, during the circular movement between positions D and E, the grippers 46, 47 Note that this is due to the looseness of the edges 17,18 held between them.

As the funnel 42 enters each bag 34, a quantity of product is released into the bag.

Before the bag leaves the weighing hend, the hopper 41 rises, the clipper 46.47 opens, and moves the bag towards the device 63, which welds the top edge 17.18 and seals the bag. Close.

The blade 64 then cuts the remaining joint of the eyelet 20 to completely separate the bag.

As the bag leaves the metering head, the loose greenery defining the opening for injecting the product is pulled flat and folded together before entering the welding device 63. Therefore device 63
can be welded without creating creases or wrinkles.

Many modifications and variations of the invention are possible. In one embodiment, the device 14 includes welding bars 65 on both sides, between which the strip 6 travels. The welding bar 65 is attached in the traveling direction (
In alternating steps corresponding to A), it is mounted on a carriage 66 which is driven by a guide 67 at the same speed as the advancement of the strip and thus accompanies the strip during the transverse welding.

Preferably, the strip 6 first passes through the guide means 25 and the rollers 27, 28 before being transferred by the belt 68 to the conveyor 21.
It is carried up to.

The small hole 20 can be formed using a cutting means connected to the welding bar and driven during the welding process.

Preferably (FIG. 6), the transverse weld lines 15 each include a pair of adjacent lines 69,70, between which the cutting lines are aligned with the blade 35.
．． 36. Furthermore, there are two small holes 7 on the top and bottom.
1.72, the upper eyelet 71 engages the carrier pin 32, while the lower eyelet 72 prevents the separation of the bag even when the cut by the last blade 64 is not properly aligned with the cut by the blades 35, 36. guaranteed.

In a second variant, means are connected to the welding bar 65 for making a preliminary score line 73 in the transverse weld to mark the preferred line for separating the bag. In this case, blade 3
5.36 is replaced by a restraining means which breaks the pre-cut and separates the bag in the semi-circular area where the metering device operates (FIG. 7).

In another embodiment, the guide rollers 27, 28 can be driven by a motor, so that the strip 6 can be reliably inserted into the pin 32 even if there is some variation in the axial distance between the holes carrying the bags. can do. As the strip is carried on the conveyor 21, a drive can increase or decrease the speed of the strip in order to properly align the eyelets 71 with the pins 32.

In another modification of the invention (FIG. 4), a plate 74 is connected to the post 30, adapted to serve as a bearing surface below the bag after product filling, to reduce the forces exerted on the eyelets 20. The plate can be adjusted by vibrating means to stabilize the product, thus improving bag filling.

If the bag needs to be labeled with instructions regarding its contents, a centering device can be provided to place the label in the center of the bag.

In a further modification, instead of folding one strip longitudinally along its center, the sections 9.10 can be obtained from different spools. In this case, another welding means welds the bottom longitudinally.

It will be noted that because of the bellows portion 11, when the bag leaves the welding means 63 after being separated by the blade 64, it remains in an upright configuration, making it more suitable for subsequent operations.

Even if the strip 6 is not a heat-sealable plastic, but a synthetic material comprising a paper or metal (aluminum) strip covered on one or both sides with a heat-sealable plastic layer, The basic inventive ideas are further applicable.

With suitable modifications, the device can also be used if the strip 6 is a single sheet of paper. However, in this case the longitudinal portion 9,1
0 is coated in its bonding area with a layer activated by solvent, heat or pressure.

The layer may either be attached to the strip originally or it may be applied by dispensing means.

It is clear that the invention disclosed herein is susceptible to many modifications and applications without departing from the scope of the inventive concept.

Furthermore, any material, size, or shape can be used as desired.

[Brief explanation of drawings]

1 is a perspective view showing the operation of the apparatus for packaging powder products in heat-sealable plastic films according to the present invention; FIG. 2 is a schematic plan view of the apparatus of FIG. 1; and FIG. 3 is the apparatus of FIG. 2. 4 is a sectional view of the bag support means taken along the line IV-TV in FIG. 1, FIG. 5 is an inverted side view of the completed bag, and FIGS. 6 and 7 are Elevation view showing two examples of deformed bags, No. 8
The figure is a perspective view of the measuring means, and FIG. 9 is a schematic plan view of the conveyor. 1-1.3... Frame, 4... Spool, 5. Spare spool, 6... Strip, 7. 26. 27. 28...
Correction roller, 3, 37...Folding means, 12°1
3, 25. 27...Guide roller, 14.63...
- Welding means, 20. 71. 72 ・Small hole, 15,
69°70...Welding line, 16.Division, 21..Conveyor, 22..Loop, 23.24...Pulley, 29.
...Bracket, 30...Column, 31...Block,
32 ・Pin, 33...Measuring head, 34...Bag, 3
5,36.64...Blade, 39...Measuring means, 40.
...Frame, 41...Hopper, 42...Funnel, 4
4.45 ・Ryo-no・, 46°47・・Lever (clipper), 48.49・・Rank, 50. 51.
61... Drive means, 52.53... Lug, 54.
55...Lever, 60...Bar, 62...Link,
65...Welding bar, 66...Carrying.

Claims (1)

[Scope of Claims] 1) The packaging strip (6) located in the vertical plane (B) is connected along the bottom edge (11) and the longitudinal top edge (1
7, 18) A series of adjacent compartments (16) with openings along them
providing said strip (6) comprising two longitudinally adjacent sections (9, 10) connected along an equidistant transverse line (15) defining an edge (17, 18) of said opening; ) forming at least one eyelet (20) at a predetermined distance along each transverse joining line and moving along a closed path of the loop (22) including an arc (α); A conveyor (21) is arranged, and the conveyor is provided with a suspension device (32) that engages with the eyelet (20), so that the section (16) is located at least along the arc (α) of the conveyor (21). The adjacent suspension means (
32) at the same time, and the section (16
) in a section (16) along said arc (α) by means of metering means (33, 39-43) arranged concentrically along said arc (α); A method of packaging various products in a sheet material package, characterized in that it comprises the steps of inserting a quantity of the product through its open opening and finally closing the compartment (16). 2) according to claim 1, characterized in that said two longitudinal parts (9, 10) are formed by folding the packaging strip (6) in the longitudinal direction along the center; A method of packaging various products in packages made of sheet materials. 3) After the formation of the eyelet (20), the sections (16) are separated from each other at the transverse line (15) by a separation line to obtain a bag (34) joined in the area containing the eyelet (20); A method of packaging various products in a sheet material package according to claim 1 or 2, characterized in that: 4) said two longitudinal portions (9, 10) are joined along an equidistant transverse line extending from a lower edge defining said bottom edge (11) to a predetermined distance from a top edge; Sheet material according to claim 3, characterized in that it defines a compartment (16) with an opening delimited by the unjoined edges (17, 18) of the parts (9, 10). A method of packaging various products in manufactured packages. 5) according to any one of claims 1 to 4, characterized in that the transverse joining line (15) has an enlarged area (19) in which a respective eyelet (20) is formed in a specific section; A method of packaging various products in the sheet material packages described. 6) The section (16) extends from the bottom edge (11) to the top edge (17).
, 18), wherein the various products are packaged in a package made of sheet material according to claim 2, characterized in that they can be separated by a preliminary score line (73) extending along the transverse direction line (15) up to 18). how to. 7) Claims 1 to 5, characterized in that the transverse joining line (15) each comprises a pair of adjacent joining lines (69, 70) with a cutting line formed between them. A method of packaging various products in sheet material packages as described in any of the above. 8) Various products in the sheet material package according to any one of claims 1 to 7, characterized in that the bellows-like portion is formed along the center fold line of the strip (6). How to package. 9) An apparatus for packaging various products in packages made of sheet material, comprising a series of adjacent compartments ( Means ( 2
7, 28), means for forming at least one eyelet (20) at a predetermined distance along each transverse joining line (15) near said upper edge (17, 18); Arc (α
), the conveyor (21) moving along a closed path in a loop comprising a section (16) at said transverse line (15);
) for suspending the conveyor (2
As a result of being arranged so as to move along the inner path of the path 1), the adjacent hanging means (29 to 32) approach each other,
The conveyor (21) is arranged concentrically with the arc (α) and the opening of the compartment (16) along the arc (α) opens, and a certain amount of product is placed in the compartment (16) along the arc (α). A device characterized in that it comprises metering means (33, 39-43) adapted to insert the compartment (16) and means (36) for closing the compartment (16). 10) The device comprises means (8) for centrally folding the packaging strip longitudinally to form the two longitudinal parts (9, 10). The device according to item 9. 11) The device has a separation line (
means (35, 36) for partially separating the compartments (16) at said transverse joining line (15);
11. Device according to claim 9 or 10, characterized in that by including an eyelet (20), a bag is obtained which is joined in the area containing the eyelet (20). 12) The conveyor (21) is connected to a pair of horizontal pulleys (23, 24)
), to which are fastened equally spaced brackets (29), from which each post (30) extends perpendicularly; Carrying at its upper end a pin (32) projecting outwardly so as to engage with and support the small hole (20) of the strip (6);
A patent characterized in that the pin (32) has a length such that its tip is outside the path of the conveyor (21), and the strip (6) is formed so as to be located inside the path. Apparatus according to claim 9. 13) The measuring means (33, 39-43) is connected to the conveyor (2
1) is arranged along a circumferential edge concentric with the arc (α) of the strip (6) and is movable vertically between a raised position and a lowered position for engaging the section (16) of the strip (6). An apparatus according to claim 9. 14) One of the pulleys (24) is connected to the measuring means (33, 39)
~43), and define the arc concentric with the other pulley (23).
defines a second circular arc (α) tangent to the straight section, and the eyelet (20) is slightly larger than the spacing between two adjacent pins (32) along the straight section; The pin (32) is located at the point where the other pulley (24) is tangent to the straight line part.
13. Device according to claim 12, characterized in that they have a mutual spacing that is smaller than the spacing between the strips (6) and the point where the next pin (32) abuts. 15) the device comprises gripping means (46, 47) adapted to grip the ends of the opening of the compartment (16) and metering means (33);
, 39-43), expanding means (52-61) adapted to expand the opening of the compartment to receive the openings of the compartments (52-61). 16) Said expansion means (52-61) are engaged between the edges (17, 18) of the strip (6) bounding the opening to widen the opening and provide the metering device ( 16. Device according to claim 15, characterized in that it comprises a plurality of pairs of lugs (52, 53) adapted to insert the lugs (33, 39-43). 17) The device allows the top edges (17, 18) of the strip (6) to
comprising folding means (37) adapted to fold into a shape;
Folding means (3) whose inner edge is folded at 90 degrees
8) is arranged upstream of the metering means (33, 39-43) so that the expansion lugs (52, 53) can be engaged between the edges (17, 18). Equipment described in Section. 18) Claims 9 to 1, characterized in that a vibration means is provided to stabilize the product in the bag.
The device according to any of paragraph 7. 19) A device according to any one of claims 9 to 17, characterized in that the device includes a device for centering the printed font in the sections. 20) comprises a section (16) defined along the longitudinally centerline folded strip (6) by a transverse joining line (15), the transverse joining line (15) extending from the fold; From the remote side, a large area (
19) A sheet material package characterized by having the following. 21) The package according to claim 20, characterized in that two upper and lower small holes (71, 72) are formed in the wide area. 22) Claim 20 or 21, characterized in that the bellows-type portion (11) is formed on the folded side.
Packages listed in section. 23) Plastic strip (6) to which the package can be heat welded
), or made of synthetic materials, including strips of paper or metal (aluminum) covered on one or both sides with heat-sealable plastic, or with areas activated by solvents, heat, pressure, etc. The second claim characterized in
The package described in item 0.