EP0466980A1 - Palletized loads wrapped with stretchable film, process and apparatus for making them - Google Patents
Palletized loads wrapped with stretchable film, process and apparatus for making them Download PDFInfo
- Publication number
- EP0466980A1 EP0466980A1 EP90201933A EP90201933A EP0466980A1 EP 0466980 A1 EP0466980 A1 EP 0466980A1 EP 90201933 A EP90201933 A EP 90201933A EP 90201933 A EP90201933 A EP 90201933A EP 0466980 A1 EP0466980 A1 EP 0466980A1
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- European Patent Office
- Prior art keywords
- film
- load
- folded
- rolled
- edges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/02—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
- B65B11/025—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders by webs revolving around stationary articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
- B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles
Definitions
- This invention relates to loads, formed by a plurality of units, wrapped in stretchable film and anchored to a pallet, the process and apparatus to produce such packages.
- the invention relates to stretchable film with folded or rolled edges, which is spiraling around a load, combined with fixing the load to a pallet by roping the lower edge of the film where it circles around the pallet thus increasing the stability of the entire package while reducing material consumption, duration of wrapping operation and improve at the same time handling of the palletized load.
- the principle of stretch wrapping is that a stretchable film is guided from an unwind and stretching location around a load by relative rotation between a load and the film supply in a spiral configuration.
- the load is mounted on a table, which turns around a vertical axis and is thereby winding the film around the load.
- the film supply moves along a vertical path such that a wrapper spiraling around the load is produced.
- the vertical path of the film usually starts at one end of the load, top or bottom, moves to the other end of the load and returns to the starting point to allow the next load to be wrapped in the same manner. Together the rotation and the vertical path up and down create double layers of film with opposite spiraling direction.
- EP-A 298 799 discloses equipment for stretching adhesive film to such an extent that the rupture resistance of the edges requires enhancement by wrinkling some of the film edge together. Furthermore it describes controlling the amount of film wrinkled at the edges to create narrow film sections allowing breathability of the load.
- a drawback common in stretch film applications is that in order to ensure stability a high degree of vertical overlap of the spiralling stretch film layers is used.
- many layers of stretch film are wrapped horizontally around the pallet and part of the lowest layer of units. Despite this effort sufficient stability was often not achieved resulting in consumer and customer dissatisfaction with disorderly loads on a pallet at inflated stretch film consumption.
- the film attaching the load to the pallet also covers the holes in the pallet designated for forklifts to handle pallets.
- An additional objective of the process of the invention is to reduce the time required to wrap a load into stretchable film and attach the load to the pallet.
- the present invention relates to loads made of a plurality of units assembled on a pallet, wrapped in stretchable film in a spiraling configuration to stabilize said load and at the same time attach said load to the pallet.
- the stretchable film combines folded or rolled edges, which stabilize the load when spiraled around it, and has a roped lower edge when banderolling over the transition zone between load and pallet.
- the roped lower edge is distinguished from the folded or rolled edges by comprising more stretch film than said folded or rolled edges.
- the roped lower edge comprises 2 to 10, more preferably 5 to 10 times the amount of stretch film used for the folded or rolled part of the edges.
- the folded or rolled edges of the film are made of less than 30 mm, more preferably 10 mm to 20 mm, of stretch film width.
- the package is characterized in that the roped lower edge is located around the upper part of the pallet, sufficiently high to prevent the rope of stretch film or the stretch film membrane extending towards the load from being damaged by, for example, forklifts which are usually employed to lift pallets.
- the packages can contain any common packaging aids, like for example but not limited to top- or bottom covers, layer separating sheets, corner stabilizers or soft protectors around pointy corners, although these can be eliminated in most instances.
- the load (2) consists of a plurality of units (21) which themselves are often packages of several subunits.
- the load (2) is spirally wrapped in stretchable film (1) to protect and stabilize the contents.
- individual bandages of stretch film (1) applied around the load (2) overlap the previous bandage, often more than by 50% of the film width, creating a unity of the overall package.
- the load (2) is also attached to a handling and transport aid, most often a pallet (3), to enhance stability by the rigid support structure for ease of handling and transport. This is accomplished when the bandages at the bottom (123) of the load (2) are applied horizontally, extending over the load (2) and over the pallet (3).
- the load (2) is spirally wrapped with a stretch film (1) with both edges folded or roped (111, 211, 112, 212) thus enhancing its stability while allowing reduction of the amount of overlap of consecutive bandages or combinations thereof.
- the other part of the invention is to firmly attach the stabilized load (2) to a pallet (3) by roping the lower edge (115) of the film (1) of the horizontal bandages at the bottom of the load (123).
- This roped lower edge (115) is distinguished from the folded or rolled lower edge (112) in that it is made of more stretch film material than the folded or rolled lower edge (112).
- the folded or rolled film edges are formed by folding or rolling less than 30 mm, preferably 10 mm to 20 mm. This combines the advantage of improved stability and minimizes the stretch film width reduction per edge.
- the roped lower edge (115) of the stretch film (1) does not extend over the openings (31) of the pallet (3). This ensures that the stretch film (1) and the roped edge (115) are not damaged when handling or transporting the pallet (3), e.g. by using a forklift or similar equipment.
- Stretch film edges (111, 211, 112, 212, 115) can be folded or rolled or be roped towards the inside or the outside of the load (2).
- the stretch film (1) to the load (2) with only part of its total length folded or rolled or roped.
- the first part of the film can have flat edges (11, 12) to cover the package once with flat film and the later part can have folded or rolled and roped edges (111, 211, 112, 212, 115) in accordance with the invention or vice versa.
- Another possibility to achieve the stabilizing effect to the load (2) is to fold one or several center parts of the film in a Z configuration producing a Z-fold (113). This would require a more complicated process but has the advantage of eliminating upper and/or lower folded or rolled edges (111, 211, 112, 212) of subsequent spiralling banderols to overlap and thereby exert especially high partial pressure onto the load (2). It is particularly advantageous to have an upper folded or rolled edge (111, 211) and one center Z-fold (113).
- loads (2) requiring breathability can be packed using the invention.
- spiralling steep enough to eliminate overlap, or folding and rolling enough of the stretch film width, to prevent overlapping of successive bandages of stretch film (1) can be used to allow breathability.
- the invention can essentially be produced with any available stretch film materials usually employed. Film materials having a single sided self adherence are preferred since they will help stabilize the folded or rolled and the roped edges.
- this standard process is complemented by folding or rolling and by roping of the film edges (111, 211, 112, 212, 115) to yield the stretched stretch film (1) for the invention.
- Placing standard equipment parts like a roller or a folding board or a folding bar (51, 52, 6) as an obstacle into the path of the film edge (11, 12) gradually bends the film edge (11, 12) thus producing the desired result (111, 211, 112, 212, 115).
- the depth and angle at which these standard equipment parts (51, 52, 6) are placed into the path of the film edge (11, 12) is decisive whether folding or rolling or roping occurs.
- the desired film edge configuration can easily be defined taking characteristics of load (2), film (1) and handling needs into account.
- a controller engages the roping equipment only during the time when the bandages at the bottom (123) are produced.
- the controller is not shown in the figures but can be, for example, a mechanical, electrical or magnetic sensor combined with a suitable activator to move the roping equipment.
- a preferred execution is to use a purely mechanical sensor/activator combination.
- Nip-rolls pressing the formed edge, folded or rolled or roped, (111, 211, 112, 212, 115) tightly together.
- Nip-rolls are not shown in the figures. They may be particularly advantageous where stretch film (1) of little or no adhesiveness is used.
- the combination of the lower edge folding or rolling step with the roping step is achieved by using, relative to the stretch film (1), movable equipment or equipment mounting.
- a standard CEKA Dominant satellite stretch wrapper is used as a basis. Loads consisting of soft polybag loads are assembled on a pallet. The conventional corner cardboard parts which used to be necessary to complete the loads such that they have acceptable stability are omitted.
- On the satellite two bars are installed perpendicular to the plane of the stretch film with a slight angle in the flow direction of the film. The bars are installed on brackets upstream of the stretch rollers. The bars create obstacles reaching 15 mm into the path of the stretch film measured from the stretch film edges. The bars bend the self adhesive side of the film edges towards the self adhesive side of the film and the fold thus formed is pressed together when the film is stretched around the stretch rollers. Nip rolls are not necessary since the self adhesiveness is sufficient to overcome the internal material resilience.
- a roping roll of hourglass shape is installed on a bracket which is movable by a lifting magnet.
- the magnet is controlled by an electro magnetic switch turning on when the horizontal banderols are produced attaching the load to the pallet.
- the hourglass shaped roll can be installed on a bracket which fixes it at the desired height by being mechanically limited to move further down when the horizontal banderols are being produced.
- the hourglass shaped roping roll when engaged extends 150 mm into the film width.
- the axis of the roping roll is approximately perpendicular to the plane of the film.
- the roping roll In the engaged position the roping roll is at level with the upper part of the pallet but not on or below the level of the handling openings in the pallet.
- the following table shows variables and especially the improvements achieved by executions according to the invention in comparison to equivalent executions according to known techniques.
- the stretch film material is polyethylene and the application equipment is a CEKA Dominant satellite stretch wrap machine.
- Stability in these examples was graded by putting the products on a 24° slope and measure the bending of a 2 m high load versus a line perpendicular to the pallet. Grade positive was given for less than 5 cm bending and grade negative was given for more than 10 cm bending. Loads tipping over were excluded, but noted.
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- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Basic Packing Technique (AREA)
- Packages (AREA)
- Pallets (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Packaging Of Machine Parts And Wound Products (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Dry Shavers And Clippers (AREA)
- Push-Button Switches (AREA)
- Stringed Musical Instruments (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Wrappers (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Eyeglasses (AREA)
Abstract
Description
- This invention relates to loads, formed by a plurality of units, wrapped in stretchable film and anchored to a pallet, the process and apparatus to produce such packages.
- More particularly the invention relates to stretchable film with folded or rolled edges, which is spiraling around a load, combined with fixing the load to a pallet by roping the lower edge of the film where it circles around the pallet thus increasing the stability of the entire package while reducing material consumption, duration of wrapping operation and improve at the same time handling of the palletized load.
- There are many different packaging materials available for loads consisting of a plurality of units standing on a pallet. A widely used type of packaging material is a stretchable film wrapped around the load and the pallet. Loads wrapped in stretchable film, as well as processes to achieve this and a variety of machines capable to carry out such processes are well known in the art, however stability problems of the complete package have so far often been resolved by employing extra material such as cardboard corner packaging aids and extra layers of stretch film itself.
- The principle of stretch wrapping is that a stretchable film is guided from an unwind and stretching location around a load by relative rotation between a load and the film supply in a spiral configuration. In one execution the load is mounted on a table, which turns around a vertical axis and is thereby winding the film around the load. At the same time the film supply moves along a vertical path such that a wrapper spiraling around the load is produced. The vertical path of the film usually starts at one end of the load, top or bottom, moves to the other end of the load and returns to the starting point to allow the next load to be wrapped in the same manner. Together the rotation and the vertical path up and down create double layers of film with opposite spiraling direction. However more than two layers or wide overlaps are often needed, especially to attach the load to a pallet, in order to ensure sufficient stability of the package. Good examples of such packaging, processes and apparatuses are contained e.g. in US-patent 3,863,425, UK-patent GB 2,063,809, German patent DE-2 724 100 or European patents EP-A 306 573 and EP-A 22 135.
- Another process of application is to have a stationary load and rotate the entire unwinding and stretching equipment around the load. This alternative application is frequently called satellite application and is especially useful if rotating the load causes problems or is impossible. Descriptions of this and similar alternatives are disclosed in
DE 3 414 964, US-appl. 411,995 or EP-A 279 871 and are widely used by the industry. - Further improvements in the technical field that have been disclosed are all based on these two basic stretch wrap applications. However they all suffer from the drawback of high film consumption and frequently require packaging aids to provide the necessary stability.
- Developments towards more economic usage of the film are described in US-4,497,159 and GB-2 083 002 by increasing the elongation of the film and thus reducing the amount of film per package.
- Similarly developments were made allowing to use various kinds of stretch film material. US patent US-4,432,185 describes bunching the front and rear end of a non-self-adhesive stretch film into a rope to facilitate fixation of the rear end to the front end of the film. EP-A 32 140 describes an improvement to the fixation of the front end of the stretch film by controlled wrapping over the front end of the film with successive layers of stretch wrap.
- In US 4,807,427 roping of stretch film material is described to engage with a basiloid container thus fixing a top and bottom cover to the stretch wrapped load.
- For loads formed by goods stacked in layers over each other US-patent 4,845,920 describes roping of the edges of stretch film and applying it in horizontal bandages such that one bandage joins two layers together. This is done to utilize the ease of application of stretch film but allow breathability of the load since the bandages are spaced vertically apart. Similar layer combining bandages are disclosed in EP- 177 413 without roping of the edges of the stretch film.
- Finally EP-A 298 799 discloses equipment for stretching adhesive film to such an extent that the rupture resistance of the edges requires enhancement by wrinkling some of the film edge together. Furthermore it describes controlling the amount of film wrinkled at the edges to create narrow film sections allowing breathability of the load.
- A drawback common in stretch film applications is that in order to ensure stability a high degree of vertical overlap of the spiralling stretch film layers is used. In addition, to securely attach the load to a pallet, many layers of stretch film are wrapped horizontally around the pallet and part of the lowest layer of units. Despite this effort sufficient stability was often not achieved resulting in consumer and customer dissatisfaction with disorderly loads on a pallet at inflated stretch film consumption. In addition, the film attaching the load to the pallet also covers the holes in the pallet designated for forklifts to handle pallets.
- These parts of the stretch film are often punched by forklifts further reducing stability, creating another esthetical disadvantage and often being unacceptable for automated warehousing.
- It is therefore an objective of the present invention to supply a load wrapped in stretch film and attached with stretch film to a pallet while having an improved stability.
- It is a further objective to supply loads wrapped in stretch film with a minimum amount of stretch film material and no or minimum amount of packaging aids.
- It is another objective of the invention to reduce packaging material, thereby satisfying the demand for decreasing packaging material consumption and improving ecological compatibility.
- It is yet another objective of the invention to provide loads attached to pallets with stretchable film keeping the handling recesses of the pallet free of such film, while achieving an increased degree of stability.
- An additional objective of the process of the invention is to reduce the time required to wrap a load into stretchable film and attach the load to the pallet.
- The present invention relates to loads made of a plurality of units assembled on a pallet, wrapped in stretchable film in a spiraling configuration to stabilize said load and at the same time attach said load to the pallet. To achieve this, the stretchable film combines folded or rolled edges, which stabilize the load when spiraled around it, and has a roped lower edge when banderolling over the transition zone between load and pallet. The roped lower edge is distinguished from the folded or rolled edges by comprising more stretch film than said folded or rolled edges.
- In a preferred embodiment the roped lower edge comprises 2 to 10, more preferably 5 to 10 times the amount of stretch film used for the folded or rolled part of the edges.
- Also in a preferred embodiment the folded or rolled edges of the film are made of less than 30 mm, more preferably 10 mm to 20 mm, of stretch film width.
- Yet in another preferred embodiment the package is characterized in that the roped lower edge is located around the upper part of the pallet, sufficiently high to prevent the rope of stretch film or the stretch film membrane extending towards the load from being damaged by, for example, forklifts which are usually employed to lift pallets.
- In general the packages can contain any common packaging aids, like for example but not limited to top- or bottom covers, layer separating sheets, corner stabilizers or soft protectors around pointy corners, although these can be eliminated in most instances.
- It is believed that the present invention will be better understood by supplementing the detailed description with drawings. The accompanying drawings have designations to identify similar or identical elements in the description.
- In the drawings :
- Figure 1 is showing a broken-away, flat section of stretch film (1) having an upper edge (11) and a lower edge (12).
- Figure 2 is showing a load (2) formed by a plurality of units (21), assembled on a pallet (3) and wrapped spirally in stretch film (1) according to known techniques, however, after only the first half of the wrapping, from top to bottom, has been done. The stretch film edges (11, 12) are flat and the attachment between the load (2) and the pallet (3) is achieved by several times horizontally wrapping the lowest banderols (123) of flat stretch film (1) over the transition from load to pallet, thereby covering the pallet recesses (31).
- Figure 3 is showing a broken-away section of stretch film (1) with folded upper edge (111) and lower edge (121) as is used in the invention, wrapped around the load.
- Figure 4 is showing a broken-away different section of stretch film (1) as used in the invention, with folded upper edge (111) and roped lower edge (115) to attach the load (2) to the pallet.
- Figure 5 is showing a preferred embodiment of the invention, however, after only the first half of the wrapping, from top to bottom, has been done. A load (2) is wrapped with the stretch film (1) with folded edges as shown in figure 3, the attachment between load (2) and pallet (3) being achieved with the stretch film (1) as shown in figure 4.
- Figure 6 is showing an alternative to the stretch film as shown in figure 3 with rolled upper edge (211) and rolled lower edge (212).
- Figure 7 is showing another alternative to the stretch film as shown in figures 3 or 6 with a folded upper edge (111) and a Z fold (113) in the center of the film.
- Figure 8 is showing the principle process as typically used in prior art for stretching film (1) by guiding it around a pair of rollers (41, 42) which rotate at different surface speeds with the downstream roller (42) being faster than the upstream roller (41). Other rollers guiding the film coming from an unwind section (401) or towards the load for application (402) are also shown.
- Figure 9 is showing the process to create folded or rolled upper edge (111, 211) and lower edge (112, 212). Folding or rolling equipment (51, 52) is forcing the film edge (11,12) to bend into folded or rolled film edges (111, 112, 211, 212). Placement of the equipment (51, 52) upstream of the stretch rollers (41, 42) is a preferred embodiment. The roping equipment (6) is shown in a non-engaged position.
- Figure 10 is showing the process to create a folded upper edge (111) and a roped lower edge (115). The roping equipment (6) is roping the stretch film (1) to such an extent that the folding or rolling equipment (52) does not reach the lower edge (12).
- The load (2) consists of a plurality of units (21) which themselves are often packages of several subunits. The load (2) is spirally wrapped in stretchable film (1) to protect and stabilize the contents. To accomplish this, individual bandages of stretch film (1) applied around the load (2) overlap the previous bandage, often more than by 50% of the film width, creating a unity of the overall package.
- Further the load (2) is also attached to a handling and transport aid, most often a pallet (3), to enhance stability by the rigid support structure for ease of handling and transport. This is accomplished when the bandages at the bottom (123) of the load (2) are applied horizontally, extending over the load (2) and over the pallet (3).
- According to one part of the invention the load (2) is spirally wrapped with a stretch film (1) with both edges folded or roped (111, 211, 112, 212) thus enhancing its stability while allowing reduction of the amount of overlap of consecutive bandages or combinations thereof. The other part of the invention is to firmly attach the stabilized load (2) to a pallet (3) by roping the lower edge (115) of the film (1) of the horizontal bandages at the bottom of the load (123). This roped lower edge (115) is distinguished from the folded or rolled lower edge (112) in that it is made of more stretch film material than the folded or rolled lower edge (112).
- In a preferred version the folded or rolled film edges (111, 211, 112, 212) are formed by folding or rolling less than 30 mm, preferably 10 mm to 20 mm. This combines the advantage of improved stability and minimizes the stretch film width reduction per edge.
- In another preferred embodiment the roped lower edge (115) of the stretch film (1) does not extend over the openings (31) of the pallet (3). This ensures that the stretch film (1) and the roped edge (115) are not damaged when handling or transporting the pallet (3), e.g. by using a forklift or similar equipment.
- Stretch film edges (111, 211, 112, 212, 115) can be folded or rolled or be roped towards the inside or the outside of the load (2).
- It is also possible to apply the stretch film (1) to the load (2) with only part of its total length folded or rolled or roped. For example the first part of the film can have flat edges (11, 12) to cover the package once with flat film and the later part can have folded or rolled and roped edges (111, 211, 112, 212, 115) in accordance with the invention or vice versa.
- Another possibility to achieve the stabilizing effect to the load (2) is to fold one or several center parts of the film in a Z configuration producing a Z-fold (113). This would require a more complicated process but has the advantage of eliminating upper and/or lower folded or rolled edges (111, 211, 112, 212) of subsequent spiralling banderols to overlap and thereby exert especially high partial pressure onto the load (2). It is particularly advantageous to have an upper folded or rolled edge (111, 211) and one center Z-fold (113).
- Advantages of stability or reduced material consumption or combinations thereof are independent of the particular load (2) or the particular way of assembling it. Hard or soft or even squeezable units (21) forming the load (2) orderly stapled or randomly piled on a pallet can benefit from the invention.
- Also loads (2) requiring breathability can be packed using the invention. For example spiralling steep enough to eliminate overlap, or folding and rolling enough of the stretch film width, to prevent overlapping of successive bandages of stretch film (1) can be used to allow breathability.
- Selection of a particular film material is also not crucial to the invention. The invention can essentially be produced with any available stretch film materials usually employed. Film materials having a single sided self adherence are preferred since they will help stabilize the folded or rolled and the roped edges.
- To make loads (2) as described above the following process steps are required : Unwinding of the stretch film (1), stretching of it and application to the load. As indicated in the prior art many processes and machines accomplish the above. Typically the process involves an unwind stand from which the film is drawn around a non-driven guiding roll (401) to a first driven stretch roll (41) which rotates at a lower surface speed than the second driven stretch roll (42). The difference in speed produces the stretching of the film (1) which is guided for example by another non-driven guiding roll (402) and applied to the palletized load (2) by relative rotation of the palletized load and the stretchable film (1). According to the invention this standard process is complemented by folding or rolling and by roping of the film edges (111, 211, 112, 212, 115) to yield the stretched stretch film (1) for the invention. Placing standard equipment parts like a roller or a folding board or a folding bar (51, 52, 6) as an obstacle into the path of the film edge (11, 12) gradually bends the film edge (11, 12) thus producing the desired result (111, 211, 112, 212, 115). The depth and angle at which these standard equipment parts (51, 52, 6) are placed into the path of the film edge (11, 12) is decisive whether folding or rolling or roping occurs. Hence the desired film edge configuration can easily be defined taking characteristics of load (2), film (1) and handling needs into account.
- To achieve folding or rolling of the film edges (111, 211, 112, 212) when wrapping the load (2) and a roped lower film edge (115) when attaching the load (2) to the pallet (3), a controller engages the roping equipment only during the time when the bandages at the bottom (123) are produced. The controller is not shown in the figures but can be, for example, a mechanical, electrical or magnetic sensor combined with a suitable activator to move the roping equipment. A preferred execution is to use a purely mechanical sensor/activator combination.
- As will become more apparent from the example, application of this process and equipment will lead to the additional advantage of reduced time required to wrap a load (2) into stretch film (1) due to the reduced number of bandages around the load (2) and the reduced overlap between successive bandages.
- For the process it is not essential where along the path of the film the folding or rolling and the roping process are placed. However it has been found to be most advantageous to have the folding or rolling devices (51, 52) upstream of the stretch rollers (41, 42) and the roping device (6) installed downstream of the stretch rollers (41, 42).
- The process can be further supplemented by nip-rolls pressing the formed edge, folded or rolled or roped, (111, 211, 112, 212, 115) tightly together. Nip-rolls are not shown in the figures. They may be particularly advantageous where stretch film (1) of little or no adhesiveness is used.
- In a preferred process and equipment embodiment according to the invention, the combination of the lower edge folding or rolling step with the roping step is achieved by using, relative to the stretch film (1), movable equipment or equipment mounting.
- But also for example for loads (2) requiring breathability it may be advantageous to install adjustable or movable rolling or folding (51, 52) equipment.
- Hereafter particular examples are described showing in detail the application of the invention.
- As a basis a standard CEKA Dominant satellite stretch wrapper is used. Loads consisting of soft polybag loads are assembled on a pallet. The conventional corner cardboard parts which used to be necessary to complete the loads such that they have acceptable stability are omitted. On the satellite, two bars are installed perpendicular to the plane of the stretch film with a slight angle in the flow direction of the film. The bars are installed on brackets upstream of the stretch rollers. The bars create obstacles reaching 15 mm into the path of the stretch film measured from the stretch film edges. The bars bend the self adhesive side of the film edges towards the self adhesive side of the film and the fold thus formed is pressed together when the film is stretched around the stretch rollers. Nip rolls are not necessary since the self adhesiveness is sufficient to overcome the internal material resilience.
- Behind the stretch rolls a roping roll of hourglass shape is installed on a bracket which is movable by a lifting magnet. The magnet is controlled by an electro magnetic switch turning on when the horizontal banderols are produced attaching the load to the pallet. Alternatively the hourglass shaped roll can be installed on a bracket which fixes it at the desired height by being mechanically limited to move further down when the horizontal banderols are being produced. The hourglass shaped roping roll when engaged extends 150 mm into the film width. The axis of the roping roll is approximately perpendicular to the plane of the film.
- In the engaged position the roping roll is at level with the upper part of the pallet but not on or below the level of the handling openings in the pallet.
- The following table shows variables and especially the improvements achieved by executions according to the invention in comparison to equivalent executions according to known techniques. For both examples the stretch film material is polyethylene and the application equipment is a CEKA Dominant satellite stretch wrap machine.
- Stability in these examples was graded by putting the products on a 24° slope and measure the bending of a 2 m high load versus a line perpendicular to the pallet. Grade positive was given for less than 5 cm bending and grade negative was given for more than 10 cm bending. Loads tipping over were excluded, but noted.
- Although many preferred and optional embodiments have been described in detail and illustrated by the drawings and the examples, many variations are possible which still fall within the scope of the claimed invention.
Claims (13)
along the path of said film (1), preferably prior to said stretching process, the edges of said film (111, 211, 112, 212) are being folded or rolled and the lower edge (115) of said film is roped when bandages are applied around the bottom (123) of said load (2) and around the top of the pallet (3).
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES90201933T ES2063246T3 (en) | 1990-07-17 | 1990-07-17 | PALLETIZED LOADS WRAPPED WITH AN EXPANDABLE FILM, PROCEDURE AND APPARATUS TO MANUFACTURE THEM. |
EP90201933A EP0466980B1 (en) | 1990-07-17 | 1990-07-17 | Palletized loads wrapped with stretchable film, process and apparatus for making them |
DE69013902T DE69013902T2 (en) | 1990-07-17 | 1990-07-17 | Pallet load wrapped with stretch film and method and device for its manufacture. |
DK90201933.0T DK0466980T3 (en) | 1990-07-17 | 1990-07-17 | Palletized cargo wrapped with stretchable film, as well as method and apparatus for forming it |
AT90201933T ATE113538T1 (en) | 1990-07-17 | 1990-07-17 | PALLET LOAD WRAPPED WITH STRETCH FILM AND METHOD AND DEVICE FOR THEIR MANUFACTURE. |
TR00655/91A TR27452A (en) | 1990-07-17 | 1991-07-09 | Palletised loads wrapped with stretchable film, process and assembly for their construction. |
PT98295A PT98295B (en) | 1990-07-17 | 1991-07-11 | PROCESS AND APPARATUS FOR OBTAINING A PALLIZED LOAD INVOLVED BY AN ELASTIC MEMBRANE WITH FOLDED OR ROLLED ORS |
NO91912778A NO912778L (en) | 1990-07-17 | 1991-07-15 | FILM-CONVERTED PALLET LOAD, AND PROCEDURE AND DEVICE FOR ITS MANUFACTURING. |
MA22502A MA22227A1 (en) | 1990-07-17 | 1991-07-16 | PALLETIZED LOADS PACKED UNDER EXTENSIBLE FILM, METHOD AND APPARATUS FOR MAKING SAME. |
IE247891A IE65741B1 (en) | 1990-07-17 | 1991-07-16 | Palletized loads wrapped with stretchable film process and apparatus for making them |
FI913429A FI93190C (en) | 1990-07-17 | 1991-07-16 | Wrapped in an extensible foil, loaded on a pallet and method and apparatus for making the load |
EG43891A EG19260A (en) | 1990-07-17 | 1991-07-17 | Palletized boads wrapped with strectchable film, process and apparatus for making them |
SA91120171A SA91120171B1 (en) | 1990-07-17 | 1991-10-06 | Loads carried on pallets (pallets) wrapped with a stretchable film, an industrial process and a device for returning them |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP90201933A EP0466980B1 (en) | 1990-07-17 | 1990-07-17 | Palletized loads wrapped with stretchable film, process and apparatus for making them |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0466980A1 true EP0466980A1 (en) | 1992-01-22 |
EP0466980B1 EP0466980B1 (en) | 1994-11-02 |
Family
ID=8205075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90201933A Expired - Lifetime EP0466980B1 (en) | 1990-07-17 | 1990-07-17 | Palletized loads wrapped with stretchable film, process and apparatus for making them |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0466980B1 (en) |
AT (1) | ATE113538T1 (en) |
DE (1) | DE69013902T2 (en) |
DK (1) | DK0466980T3 (en) |
EG (1) | EG19260A (en) |
ES (1) | ES2063246T3 (en) |
FI (1) | FI93190C (en) |
IE (1) | IE65741B1 (en) |
MA (1) | MA22227A1 (en) |
NO (1) | NO912778L (en) |
PT (1) | PT98295B (en) |
SA (1) | SA91120171B1 (en) |
TR (1) | TR27452A (en) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0676332A1 (en) * | 1994-04-07 | 1995-10-11 | Newtec International | Improved method for overwrapping and transporting an overwrapped palettized load |
GB2297534A (en) * | 1995-02-03 | 1996-08-07 | Mancon Engineering Ltd | Adjusting the width of a web of wrapping material |
WO1999007618A1 (en) * | 1997-08-12 | 1999-02-18 | Dupont Dow Elastomers L.L.C. | System and method for packaging viscoelastic materials |
US6070393A (en) * | 1996-05-06 | 2000-06-06 | Thimon, S.A. | Outer wrapping film, a device for prior stretching of the film, and an outer wrapping method |
WO2004069659A1 (en) * | 2003-01-31 | 2004-08-19 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
WO2008114076A1 (en) * | 2007-03-19 | 2008-09-25 | Bema-S.R.L. | Process for wrapping loads and relative system |
US7707801B2 (en) | 2005-04-08 | 2010-05-04 | Lantech.Com, Llc | Method for dispensing a predetermined amount of film relative to load girth |
US7779607B2 (en) | 2006-02-23 | 2010-08-24 | Lantech.Com, Llc | Wrapping apparatus including metered pre-stitch film delivery assembly and method of using |
ITVR20130257A1 (en) * | 2013-11-26 | 2015-05-27 | Bema Srl | HEAD FOR WRAPPING LOADS, PARTICULARLY PALLETIZED LOADS AND RESPECTIVE OPERATING METHOD |
US20160159503A1 (en) * | 2014-12-09 | 2016-06-09 | Smurfit Kappa Bates LLC | Method of securing bulk flowable goods in paperboard container |
EP3070003A1 (en) * | 2015-03-17 | 2016-09-21 | Robopac S.p.A. | Unwinding apparatus for a self-propelled wrapping machine |
US9725195B2 (en) | 2008-01-07 | 2017-08-08 | Lantech.Com, Llc | Electronic control of metered film dispensing in a wrapping apparatus |
US9776748B2 (en) | 2013-02-13 | 2017-10-03 | Lantech.Com, Llc | Containment force-based wrapping |
US9908648B2 (en) | 2008-01-07 | 2018-03-06 | Lantech.Com, Llc | Demand based wrapping |
US9932137B2 (en) | 2012-10-25 | 2018-04-03 | Lantech.Com, Llc | Corner geometry-based wrapping |
US10005581B2 (en) | 2012-10-25 | 2018-06-26 | Lantech.Com, Llc | Effective circumference-based wrapping |
US10005580B2 (en) | 2012-10-25 | 2018-06-26 | Lantech.Com, Llc | Rotation angle-based wrapping |
US10053253B2 (en) | 2014-10-07 | 2018-08-21 | Lantech.Com, Llc | Graphical depiction of wrap profile for load wrapping apparatus |
US10227152B2 (en) | 2014-01-14 | 2019-03-12 | Lantech.Com, Llc | Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction |
US10934034B2 (en) | 2015-09-25 | 2021-03-02 | Lantech.Com, Llc | Stretch wrapping machine with automated determination of load stability by subjecting a load to a disturbance |
IT202000001984A1 (en) * | 2020-01-31 | 2021-07-31 | Aetna Group Spa | Method and apparatus for wrapping |
US11208225B2 (en) | 2018-08-06 | 2021-12-28 | Lantech.Com, Llc | Stretch wrapping machine with curve fit control of dispense rate |
IT202000018874A1 (en) * | 2020-07-31 | 2022-01-31 | Aetna Group Spa | APPARATUS AND METHOD FOR WRAP A LOAD |
US11479378B2 (en) | 2019-09-09 | 2022-10-25 | Lantech.Com, Llc | Stretch wrapping machine with dispense rate control based on sensed rate of dispensed packaging material and predicted load geometry |
US11518557B2 (en) | 2019-09-19 | 2022-12-06 | Lantech.Com, Llc | Packaging material grading and/or factory profiles |
US11667416B2 (en) | 2017-09-22 | 2023-06-06 | Lantech.Com, Llc | Load wrapping apparatus wrap profiles with controlled wrap cycle interruptions |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102006058735A1 (en) * | 2006-12-13 | 2008-06-19 | Erapa-Lenzen Gmbh & Co.Kg | Winding packaging film around flat goods stack involves reducing film width after leaving film roll by gathering it and winding deformed foil in windings about stack, whereby successive windings are adjacent without touching |
WO2012058596A1 (en) | 2010-10-29 | 2012-05-03 | Lantech.Com, Llc | Machine generated wrap data |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0300855A1 (en) * | 1987-06-26 | 1989-01-25 | Newtec International | Web with longitudinal reinforcement, its manufacture and its use in packaging methods and device for making such a web |
US4807427A (en) * | 1988-04-21 | 1989-02-28 | Liberty Industries, Inc. | Stretch wrapping roping apparatus |
-
1990
- 1990-07-17 DE DE69013902T patent/DE69013902T2/en not_active Expired - Lifetime
- 1990-07-17 AT AT90201933T patent/ATE113538T1/en not_active IP Right Cessation
- 1990-07-17 EP EP90201933A patent/EP0466980B1/en not_active Expired - Lifetime
- 1990-07-17 DK DK90201933.0T patent/DK0466980T3/en active
- 1990-07-17 ES ES90201933T patent/ES2063246T3/en not_active Expired - Lifetime
-
1991
- 1991-07-09 TR TR00655/91A patent/TR27452A/en unknown
- 1991-07-11 PT PT98295A patent/PT98295B/en not_active IP Right Cessation
- 1991-07-15 NO NO91912778A patent/NO912778L/en unknown
- 1991-07-16 FI FI913429A patent/FI93190C/en active
- 1991-07-16 MA MA22502A patent/MA22227A1/en unknown
- 1991-07-16 IE IE247891A patent/IE65741B1/en not_active IP Right Cessation
- 1991-07-17 EG EG43891A patent/EG19260A/en active
- 1991-10-06 SA SA91120171A patent/SA91120171B1/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0300855A1 (en) * | 1987-06-26 | 1989-01-25 | Newtec International | Web with longitudinal reinforcement, its manufacture and its use in packaging methods and device for making such a web |
US4807427A (en) * | 1988-04-21 | 1989-02-28 | Liberty Industries, Inc. | Stretch wrapping roping apparatus |
Cited By (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0676332A1 (en) * | 1994-04-07 | 1995-10-11 | Newtec International | Improved method for overwrapping and transporting an overwrapped palettized load |
US5634321A (en) * | 1994-04-07 | 1997-06-03 | Newtec International | Optimized method of applying an outer wrapping, and of transporting a wrapped load |
FR2718414A1 (en) * | 1994-04-07 | 1995-10-13 | Newtec Int | Optimized method of overpacking and transporting an overpacked load. |
GB2297534A (en) * | 1995-02-03 | 1996-08-07 | Mancon Engineering Ltd | Adjusting the width of a web of wrapping material |
US6170772B1 (en) | 1996-05-06 | 2001-01-09 | Thimon, S.A. | Outer wrapping film, a device for prior stretching of the film, and an outer wrapping method |
US6070393A (en) * | 1996-05-06 | 2000-06-06 | Thimon, S.A. | Outer wrapping film, a device for prior stretching of the film, and an outer wrapping method |
US6170776B1 (en) | 1996-05-06 | 2001-01-09 | Thimon, S.A. | Outer wrapping film, a device for prior stretching of the film, and an outer wrapping method |
WO1999007618A1 (en) * | 1997-08-12 | 1999-02-18 | Dupont Dow Elastomers L.L.C. | System and method for packaging viscoelastic materials |
WO2004069659A1 (en) * | 2003-01-31 | 2004-08-19 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
US11472580B2 (en) | 2003-01-31 | 2022-10-18 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
US7568327B2 (en) | 2003-01-31 | 2009-08-04 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
AU2004209517B2 (en) * | 2003-01-31 | 2010-04-22 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
US9290282B2 (en) | 2003-01-31 | 2016-03-22 | Lantech.Com, Llc | Apparatus for securing a load to a pallet with a roped film web |
EP2216251A1 (en) * | 2003-01-31 | 2010-08-11 | Lantech.com, LLC | Method and apparatus for securing a load to a pallet with a roped film web |
US10173795B2 (en) | 2003-01-31 | 2019-01-08 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
US7707801B2 (en) | 2005-04-08 | 2010-05-04 | Lantech.Com, Llc | Method for dispensing a predetermined amount of film relative to load girth |
US8141327B2 (en) | 2005-04-08 | 2012-03-27 | Lantech.Com, Llc | Method and apparatus for dispensing an amount of film relative to load girth |
US9187193B2 (en) | 2005-04-08 | 2015-11-17 | Lantech.Com, Llc | Method and apparatus for dispensing an amount of film relative to girth |
US8276354B2 (en) | 2006-02-23 | 2012-10-02 | Lantech.Com, Llc | Apparatus for securing a load to a pallet with a roped film web |
US8276346B2 (en) | 2006-02-23 | 2012-10-02 | Lantech.Com, Llc | Wrapping apparatus and method including metered pre-stretch film delivery assembly |
US8037660B2 (en) | 2006-02-23 | 2011-10-18 | Lantech.Com, Llc | Method for securing a load to a pallet with a roped film web |
US7779607B2 (en) | 2006-02-23 | 2010-08-24 | Lantech.Com, Llc | Wrapping apparatus including metered pre-stitch film delivery assembly and method of using |
WO2008114076A1 (en) * | 2007-03-19 | 2008-09-25 | Bema-S.R.L. | Process for wrapping loads and relative system |
US9725195B2 (en) | 2008-01-07 | 2017-08-08 | Lantech.Com, Llc | Electronic control of metered film dispensing in a wrapping apparatus |
US9908648B2 (en) | 2008-01-07 | 2018-03-06 | Lantech.Com, Llc | Demand based wrapping |
US10005580B2 (en) | 2012-10-25 | 2018-06-26 | Lantech.Com, Llc | Rotation angle-based wrapping |
US11104464B2 (en) | 2012-10-25 | 2021-08-31 | Lantech.Com, Llc | Rotation angle-based wrapping of loads with varying dimensions |
US9932137B2 (en) | 2012-10-25 | 2018-04-03 | Lantech.Com, Llc | Corner geometry-based wrapping |
US10005581B2 (en) | 2012-10-25 | 2018-06-26 | Lantech.Com, Llc | Effective circumference-based wrapping |
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US10239645B2 (en) | 2013-02-13 | 2019-03-26 | Lantech.Com, Llc | Packaging material profiling for containment force-based wrapping |
US9776748B2 (en) | 2013-02-13 | 2017-10-03 | Lantech.Com, Llc | Containment force-based wrapping |
US10717554B2 (en) | 2013-02-13 | 2020-07-21 | Lantech.Com, Llc | Containment force-based wrapping |
US10384817B2 (en) | 2013-11-26 | 2019-08-20 | Bema S.R.L. | Wrapping head for loads, particularly for palletized loads and method of operation thereof |
WO2015079306A1 (en) | 2013-11-26 | 2015-06-04 | Bema S.R.L. | Wrapping head for loads, particularly for palletized loads and method of operation thereof |
ITVR20130257A1 (en) * | 2013-11-26 | 2015-05-27 | Bema Srl | HEAD FOR WRAPPING LOADS, PARTICULARLY PALLETIZED LOADS AND RESPECTIVE OPERATING METHOD |
US11597554B2 (en) | 2014-01-14 | 2023-03-07 | Lantech.Com, Llc | Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction |
US11685567B2 (en) | 2014-01-14 | 2023-06-27 | Lantech.Com, Llc | Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction |
US10227152B2 (en) | 2014-01-14 | 2019-03-12 | Lantech.Com, Llc | Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction |
US10053253B2 (en) | 2014-10-07 | 2018-08-21 | Lantech.Com, Llc | Graphical depiction of wrap profile for load wrapping apparatus |
US10435191B2 (en) | 2014-10-07 | 2019-10-08 | Lantech.Com, Llc | Projecting containment force for load wrapping apparatus |
US10926906B2 (en) | 2014-10-07 | 2021-02-23 | Lantech.Com, Llc | Load stability-based wrapping |
US20160159503A1 (en) * | 2014-12-09 | 2016-06-09 | Smurfit Kappa Bates LLC | Method of securing bulk flowable goods in paperboard container |
EP3070003A1 (en) * | 2015-03-17 | 2016-09-21 | Robopac S.p.A. | Unwinding apparatus for a self-propelled wrapping machine |
US10934034B2 (en) | 2015-09-25 | 2021-03-02 | Lantech.Com, Llc | Stretch wrapping machine with automated determination of load stability by subjecting a load to a disturbance |
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US11505343B2 (en) | 2015-09-25 | 2022-11-22 | Lantech.Com, Llc | Stretch wrapping machine with automated determination of load stability by subjecting a load to a disturbance |
US11667416B2 (en) | 2017-09-22 | 2023-06-06 | Lantech.Com, Llc | Load wrapping apparatus wrap profiles with controlled wrap cycle interruptions |
US11208225B2 (en) | 2018-08-06 | 2021-12-28 | Lantech.Com, Llc | Stretch wrapping machine with curve fit control of dispense rate |
US11479378B2 (en) | 2019-09-09 | 2022-10-25 | Lantech.Com, Llc | Stretch wrapping machine with dispense rate control based on sensed rate of dispensed packaging material and predicted load geometry |
US11518557B2 (en) | 2019-09-19 | 2022-12-06 | Lantech.Com, Llc | Packaging material grading and/or factory profiles |
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WO2021152522A1 (en) * | 2020-01-31 | 2021-08-05 | Aetna Group S.P.A. | Method and apparatus for wrapping |
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WO2022024020A1 (en) * | 2020-07-31 | 2022-02-03 | Aetna Group S.P.A. | Apparatus and method for wrapping a load |
IT202000018874A1 (en) * | 2020-07-31 | 2022-01-31 | Aetna Group Spa | APPARATUS AND METHOD FOR WRAP A LOAD |
Also Published As
Publication number | Publication date |
---|---|
PT98295A (en) | 1993-09-30 |
PT98295B (en) | 1998-12-31 |
IE912478A1 (en) | 1992-01-29 |
FI913429A0 (en) | 1991-07-16 |
FI93190C (en) | 1995-03-10 |
EG19260A (en) | 1994-11-30 |
SA91120171B1 (en) | 2003-02-23 |
DE69013902D1 (en) | 1994-12-08 |
FI93190B (en) | 1994-11-30 |
DK0466980T3 (en) | 1994-12-27 |
FI913429A (en) | 1992-01-18 |
EP0466980B1 (en) | 1994-11-02 |
DE69013902T2 (en) | 1995-05-18 |
NO912778D0 (en) | 1991-07-15 |
ATE113538T1 (en) | 1994-11-15 |
IE65741B1 (en) | 1995-11-15 |
MA22227A1 (en) | 1992-04-01 |
ES2063246T3 (en) | 1995-01-01 |
NO912778L (en) | 1992-01-20 |
TR27452A (en) | 1995-05-29 |
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