JP2007508206A - Method and apparatus for packaging goods with a film of plastic material, and the packaging thus obtained - Google Patents

Abstract

According to a method for packaging articles with a film of plastic material, a band of plastic film (6) is supplied to conveying means (5), while a strip of glue (18) is applied along a longitudinal edge of the band of plastic film (6) and zones of glue (19), regularly spaced apart, are applied crosswise to the band of plastic film (6). A series of articles (2) to be packaged are supplied to the conveying means (5), above the band of plastic film (6) in positions between the transversal zones of glue (19) and then the longitudinal edges of the band of plastic film (6) are folded to form a tube around the articles (2), so as to overlap the edges of the band of plastic film (6). The edges of the band of plastic film (6) are pressed to stabilize joining and the transversal zones of glue (19) are also pressed while cutting at the same time the band of plastic film (6) crosswise in portions located between the transversal zones of glue (19), in order to obtain single packages of articles (2).

Description

  The present invention relates to a method for packaging goods with a film of plastic material and to an apparatus for carrying out this method. The invention also relates to packaging obtained using the method and apparatus described above.

  Printed goods such as books, newspapers, magazines, etc. are often packaged by a protective film of plastic material, usually transparent, eg cellophane.

  Goods are packaged by a well-known machine that is uniformly spaced from the packaging station to the device, has conveying means for supplying the goods, and forms a plastic film wrap around the goods. In the machine described above, the plastic film band is continuously supplied to the conveying means, aligned with the means for supplying the goods to be packaged, and operates continuously.

  Goods are optimally spaced on plastic film bands wound over them and moved in a row by suitable folding means, so that they have a tubular shape with overlapping longitudinal edges . Each wrap is then acted on the overlapping edges of the plastic film to cause each wrapping by means of a longitudinal welding means and a subsequent transverse welding means to create a transverse weld between adjacent products. Closed around one product. The plastic film is then cut between the lateral welds to obtain a single package.

  In known devices, the device used for the welding of the overlying edges of a plastic film has an essentially circular welding surface and is arranged on a surface that is longitudinal with respect to the line supplying the plastic film. Usually includes a welding member.

  The pressing means is located downstream of the welding member acting on the commodity wrapped with the plastic film.

  European patent EP 0.220.759 describes a longitudinal welding device in which the above-mentioned welding member is carried by vibrating around a horizontal axis transverse to the direction of forward movement of the product. The welding members are heated to create a coating with plastic bands at the stacked edges, thus sealing them together.

  Furthermore, according to another known solution, the transverse welding means are activated while moving alternately at the same speed along the longitudinal feeding direction of the goods wrapped in plastic film bands. The plastic film band is sealed laterally during the forward stroke of the welding means.

  The longitudinal and lateral welding of the plastic film described above requires a significant amount of time for the entire packaging cycle.

  The welding time cannot be reduced without compromising the quality of the resulting packaging, which is an obvious limitation in the manufacture of known packaging machines.

  The object of the present invention is to solve the above-mentioned problems, in particular by significantly increasing the production rate, by proposing an efficient and fast product packaging method with plastic material films.

  Another object of the invention is to propose an apparatus for carrying out the above method with a simple, reliable and versatile structure.

The object described above is obtained according to the content of the claims by a method of packaging goods with a film of plastic material and is characterized in that it comprises the following steps:
-Continuous supply of plastic film bands to the conveying means;
-Application of at least one strip of glue along the longitudinal edge of the plastic film band;
-The application of at least one series of sheet glue (19) which is transversely spaced relative to the plastic film band;
-Regular movement of the packaged series of goods to the transport means on a plastic film band fed to the same transport means, each at a position delimited between the lateral sheet glues;
A plastic film on a product that takes the shape of a tube around the product being packaged so as to overlap the longitudinal edges of the plastic film band, with the longitudinal strip of glue remaining between the opposing edges of the band Folding of the longitudinal edge of the band;
-Bonding of the edges of the plastic film band along the longitudinal strip and the transverse surface glue;
-Transverse cutting of plastic film bands at the part located between the lateral sheet glues to obtain a single package of goods.

The method described above is carried out by an apparatus for packaging merchandise with a film of plastic material and is characterized in that it consists of:
Conveying means for continuous feeding of plastic film bands;
Glue application station where appropriate glue is applied;
First glue application means located at the glue application station for applying at least one band of glue along the longitudinal edge of the plastic film band;
A second glue application means located at the glue application station for applying at least one series of lateral planar glues uniformly spaced from the plastic film band;
Fold the longitudinal edge of the plastic film band on the product so that it takes a tubular shape around the product that is wrapped and moved along the conveying means, along with the longitudinal edge of the plastic film band to be overlaid, and Fixed folding means such that the directional band paste remains between the opposing longitudinal edges of the band;
Means for stabilizing the bonding of the longitudinal edges of the plastic film band along the longitudinal strip and the transverse planar paste;
Means for transversely cutting a plastic film band at the part located between the lateral surface glues to obtain a single package of goods.

  By using the method and associated machine for performing the method described herein, the transverse direction is closed by means of the strip and the longitudinal edges of the sheets joined together by means of the strip A package is obtained which includes a product wrapped in a sheet of plastic material having a plurality of ends.

Properties that characterize the present invention will be pointed out in the following description of some preferred but non-limiting embodiments with respect to the disclosed figures. put it here,
FIG. 6 is a side view of the entire apparatus for packaging merchandise with a film of plastic material according to the proposed method. A part of a film of plastic material is shown. FIG. 2 shows details of the enlarged k in FIG. Fig. 2 is a plan view of the proposed device. FIG. 6 is a corresponding top view of a plastic film band during product packaging. FIG. 6 is a partial side view of a lateral direction in another embodiment of the proposed apparatus.

Preferred embodiments for carrying out the invention

  With reference to the above figures, reference numeral 1 denotes an apparatus for wrapping a product 2, such as a book, newspaper, magazine, etc., with a plastic material, preferably a transparent protective film such as cellophane.

  By means of a conveying line 3 provided in a known manner, the goods 2 to be wrapped are regularly supplied to the device 1 by suitable drive means 4.

  The device 1 includes a transport belt 5 that operates continuously in the direction indicated by arrow A.

  The plastic film band 6 is continuously fed onto the conveyor belt 5 and is thereby withdrawn from the entry area of the product 2 to be packaged. The plastic film band 6 is rewound from the bobbin 16.

  Upstream of the area where the goods 2 to be packaged enter the transport belt 5, the plastic film band 6 passes through a station C where the appropriate glue, heated appropriately, is applied.

  Station C is located, for example, in a region corresponding to the vertical path of band 6 extending between suitable deflection rollers 7.

  In the station C, there are a first glue applying means 8 and a second glue applying means 9 such as a well-known type of spray nozzle.

  The first glue applying means 8 is intended to apply a band-like glue 18 along the longitudinal edge of the plastic film band 6; the second glue applying means 9 is used for the plastic film 6 (see FIG. 1A). The intention is to apply a series of planar glues 19 that are uniformly spaced transversely to the band.

  It is desirable that the band-like paste 18 is applied to the same side of the plastic film band 6, in particular to the plastic film band 6 side to be rotated inside the package 2, as is the case of the lateral surface-like paste 19.

  The longitudinal edge of the plastic film band 6 is intended to wrap the plastic film band 6 in the shape of a tube around the product 2 to be packaged and hits the folding means 10 which are moved in turn by the transport belt 5.

  The folding means 10 guides the edges of the plastic film band 6 so as to cross over the product 2 and overlap substantially along the longitudinal axis in the middle of the transport belt 5 (see particularly FIG. 2).

  The rotating presser belt 11 intended to act on the stacked edges of the plastic film band 6 in the direction of forward movement A of the conveying belt 5 downstream of the folding means 10 is covered substantially by a longitudinal planar glue 18. Exists to stabilize edge coupling in the region to be processed.

  The position of the rotating presser belt 11 can be adjusted vertically by suitable actuation means.

  The cutting means 12 is located downstream of the rotating presser belt 11 defined by a series of deflection wheels 14 in a region corresponding to the wheel made on the conveyor belt 5.

  The cutting means 12 is intended to cut the plastic film band 6 in the transverse direction in a region corresponding to the joined part of the transverse planar glue 19 in order to obtain a single package of the goods 2.

  In this case, the cutting | disconnection means 12 has the suitable cutting member T provided in those peripheral surfaces, and contains a pair of reverse rotation roller 13A and 13B of an upper part and a lower part, respectively.

  The cutting member T is carried radially in the region 19 by the upper wheel 13A and is located between the two presser elements 60A and 60B that are intended to press the two side-by-side transverse portions 19A and 19B. including. The portions 19A and 19B are separated when the region 19 is cut by the blade 50.

  Thus, according to the method of packaging the product 2, the band-like glue 18 is applied to the plastic film band 6 at the station C as in the lateral surface-like glue 19 that is uniformly spaced on the plastic film band 6. It is applied along the longitudinal edges.

  The glue can be applied in that it is a continuous method or in any other suitable way as required by the use.

  In FIG. 4, the first glue applying means 8 has a pair of counter rotating wheels 15, contacts the plastic film band 6, and applies a continuous band-like glue 18 along the longitudinal edge of the plastic film band 6. As such, another embodiment of a device fed by a suitable glue tank 17 is shown.

  The plastic film band 6 together with the glue applied to it is continuously fed to the transport belt 5 on which the goods 2 to be packaged are regularly transported at each position defined between the lateral planar glues 19. Is done.

  The folding means 10 then folds the edges of the plastic film band 6 to form a tube around the packaged goods 2 conveyed in sequence on the transport belt 5 and contacts the opposite edges of the plastic film band 6 The edges of the plastic film band 6 are overlapped with the longitudinal planar paste 18.

  The rotating presser belt 11 then acts on the overlapping edges of the plastic film band 6 in the region having the substantially longitudinal planar glue 18 to stabilize the edges in the longitudinal connection.

  The plastic film band 6 wrapped in a tubular shape around the product 2 is attached to the counter-rotating rollers 13A and 13B of the cutting means 12 that stabilizes the joint with the lateral planar paste 19 by the operation of the small presses 60A and 60B. The band 6 is cut in the lateral direction by the cutting member T.

  Note that the plastic film band 6 is cut laterally by the blade 50 along the part joined by the lateral planar glue 19, more precisely in the middle of the region 19, ie between the parts 19A and 19B. (See FIG. 3).

  Thus, the proposed method achieves the purpose of packaging goods with a film of plastic material in an efficient and fast way, in particular it reduces the packaging cycle period and thereby significantly increases productivity.

  The resulting package shown in FIG. 3 partially bonded to a plastic band is a magazine wrapped in a sheet 6 of plastic material having ends 19A, 19B closed by band paste between the upper and lower parts of the sheet. , Including products such as books and newspapers. The longitudinal edges of the sheets are also joined to each other by strip glue 18.

  In particular, the result is that the longitudinal connection of the edges of the plastic film wrapped around the product in a tubular shape, and the lateral connection of the same tubular plastic film between two adjacent products, at a suitable work station. This is achieved by the fact that it is obtained by the use of a suitable glue applied to the plastic film.

  In other words, the longitudinal and lateral bonding of the edges of the plastic film eliminates all the heat-welding means necessary to seal the plastic band and all the associated problems well known to those skilled in the art. The proposed method obtained by heat welding solves the technical problems of known equipment.

  It is also pointed out that this result is obtained with a simple, reliable and versatile device.

The proposed invention has been described by way of example only and not limitation with respect to the disclosed figures. It is therefore evident that any changes or modifications applied thereto, as described above and claimed below, remain within the protective scope of this technical solution.

Claims (10)

A method of packaging goods with a film of plastic material, comprising the following steps:-continuous feeding of plastic film band (6) to conveying means (5);-longitudinal edge of said plastic film band (6) Application of at least one strip of glue (18) along the line;-application of at least one series of planar glue (19) spaced uniformly laterally to the plastic film band (6); The said of the series of products (2) packaged on the plastic film band (6) fed to the same conveying means (5), respectively, at a position delimited between the lateral planar glue (19) Regular movement to the conveying means (5); stays between the opposite edges of the band (6) at the longitudinal edges of the plastic film band (6); The longitudinal edge of the plastic film band (6) on the product together with the longitudinal strip glue (18) to take a tubular shape around the product (2) to be packaged Folding the edge of the plastic film band (6) along the longitudinal strip (18) and the transverse paste (19);-to obtain a single package of goods (2) A process characterized in that it comprises a transverse cut of said plastic film band (6) at the part located between the transverse planar glues (19). 2. The method according to claim 1, wherein the longitudinal strip (18) and the lateral planar paste (19) are applied on the same side as the plastic film band (6). How to be attached. 3. The method according to claim 2, wherein the longitudinal strip (18) and the lateral planar paste (19) are rotated in the plastic film band (2) inside a package of goods (2). A method characterized in that it is applied on the same side as 6). 2. A method according to claim 1, wherein the longitudinal strip (18) is applied continuously along one of the longitudinal edges of the plastic film band (6). Characterized method. 2. The method according to claim 1, wherein the longitudinal strip (18) and the transverse planar paste (19) are upstream of the region into which the product (2) to be packaged enters the conveying means (5). Characterized in that it is applied to the plastic film band (6) of the station (C) located in A device for packaging products with a film of plastic material, having the following configuration, a conveying means (5) continuously supplied with a plastic film band (6); a glue application station (C) to which an appropriate glue is applied First glue application means (8) located at the glue application station for applying at least one band glue (18) along the longitudinal edge of the plastic film band (6); A second glue application means (9) located at the glue application station for applying at least one series of laterally planar glue (19), spaced uniformly from the band (6); Tubular around the product (2) packaged and moved along the conveying means (5) with the longitudinal edge of the plastic film band (6) Fold the longitudinal edges of the plastic film band on the product (2) to take a shape, and the longitudinal strip (18) is between the opposing longitudinal edges of the band (6) Fixed folding means (10), such as staying in the longitudinal direction of the plastic film band (6) along the longitudinal strip (18) and the transverse planar paste (19) Means (11, 13) for stabilizing the bonding of the plastic film band (6) in the part located between the lateral surface glues (19) in order to obtain a single package of the goods (2) A device characterized in that it comprises means (12) for transversely cutting the surface. 7. A device according to claim 6, wherein said means for transversely cutting said plastic film band (6) is a pair of counter-rotating rollers (13A, 13B) at least one of which carries a radial blade (50). ), And in the step relating to the cutting of the transverse strip (19) by the blade (50) so as to separate the two parts (19A, 19B), the adjacent part (19A) of the transverse planar glue (19) , 19B) for compressing the device, characterized in that it comprises two presser elements (60A, 60B) located on either side of the blade (50). Packaging obtained by the method of claim 1, wherein the strip (19) and the lateral ends (closed by the longitudinal edges of the sheets joined together by the strip (18)) 19A, 19B) packaging including goods wrapped in plastic material sheet (6). 9. Packaging according to claim 8, wherein the band paste (19) is applied to each lateral end (19A, 19B) between the upper and lower parts of the sheet (6) wrapped around the product in a tubular shape. Existing packaging. 9. Packaging according to claim 8, wherein the strip (18) is present between the longitudinally stacked edges of the sheet (6) wrapped in a tubular shape around the product.

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