64results about "Prestretching mechanism" patented technology

A pallet wrapping system with at least one spindle, a support bar, a perforation roller, and a pre-stretch machine. The support bar has a plurality of arms that are configured to receive stretch film from the at least one spindle and create banded edges on the stretch film as it passes through the plurality of arms. The pallet wrapping system is configured to form a reinforced stretch film using the plurality of arms and the stretch film from the at least one spindle. The perforation roller is configured to form a plurality of holes through the reinforced stretch film as the reinforced stretch film passes over the perforation roller. The pre-stretch machine is configured to receive the reinforced stretch film and stretch the reinforced stretch film prior to wrapping a palletized load with the reinforced stretch film.

A machine for wrapping one or more bundles with stretch film from a reel with continuous suction, comprising: - at least one wrapping unit (14) consisting of at least one ring wrapping machine (16) which, on rotating, arranges stretch film (21) around the one or more bundles (13), wherein said film (21) is unwound from a reel (20) arranged on a rotating ring (17) of said ring wrapping machine (16) and is caused to be arranged around one or more bundles (13), during the transiting of the latter in the wrapping unit, a pre-stretching group (22) of the stretch film (21) which generates an axial deformation of said stretch film which is being unwound from said reel (20) and is passed through said pre- stretching group (22), a vacuum box (30) which continuously receives said stretch film provided with said axial deformation generated in the pre- stretching group (22), wherein said vacuum box (30) has a volume within which the film moves and keeps its axial deformation generated in said pre-stretching group (22) as it passes forwards inside the same, substantially constant, wherein said vacuum box (30) is arranged downstream of said pre-stretching group (22) and both are arranged on said rotating ring (17) around said one or more bundles (13), a magnetic track (40) which is associated with said rotating ring (17) and rotates and causes a magnetic track wheel or disc (41) to rotate, which create a magnetic transmission, the shaft (42) of which is supported in said pre-stretching group (22), which actuates at least one rubber roller (25, 25') on which said film passes, - a dynamo (49) on board the rotating ring (17) connected directly to the magnetic transmission and connected to batteries (48), - a vacuum pump (45) motorized in (46) on board the rotating ring (17) connected to the vacuum box (30) and to said batteries (48).

Various embodiments of the present disclosure provide a system and method for forming a sleeve of paper wrapping material around a load of goods.

Various embodiments of the present disclosure provide a system and method for forming a sleeve of paper wrapping material around a load of goods.

A wrapping machine (1) for wrapping a load (100) with a band (50) made of a cellulose and / or vegetable fibers based material, in particular paper, unwound from a reel (51) comprises an upright (3), a moving carriage (4) movable along the support upright (3), unwinding apparatus (5) for supporting a reel (51) of band and provided with roller means (20) for unwinding the band (50), moving means (2; 62; 72) for moving said upright (3; 63; 73) and said load (100) around each other for a plurality of wrapping turns and a supporting arm (10) supporting pressure means (11) and cutting means (12) respectively to press a portion of the band (50) on the load (100) at the end of the wrapping and to cut the band (50); the unwinding apparatus (5) is fixed to the moving carriage (4) rotatably about a tilt axis (S) to tilt along with the band (50) during the wrapping of the load (100) and the supporting arm (10) is rotatably fixed to the moving carriage (4) about a rotation axis (X) so as to rotate between a non-operating position (A), in which the pressure means (11) and the cutting means (12) are spaced apart from the load (100), and an operating position (B), in which they are substantially in contact with the load (100).

A system includes a wrapping machine for dispensing film to wrap a load disposed on a pallet, a plurality of sensors configured to detect operation of the machine, and a controller operably and communicatively connected with the sensors. The controller is configured to establish desired values of operating parameters of the machine, the parameters including a wrap pattern, weight of the film, a number of revolutions, a percent of stretch of the film, and a tension of film, during operation of the machine, monitor actual values of the operating parameters using data from the sensors, and in response to a difference between the desired values and the actual values being greater than a threshold, issue a command to adjust operation of the machine such that the difference is less than the threshold.

Various embodiments of the present disclosure provide a system and method for forming a wrap of paper wrap material around a cargo load.

A stretch packaging apparatus includes a film conveyance unit configured to convey a film to a packaging area, by holding both sides of the film in a width direction; a lift unit configured to push up the film while a product is pressed against the film from below; a pair of folding plates configured to fold a peripheral edge part of the pushed-up film onto a bottom surface side of the product; a pair of pushing plates configured to press each of both end parts of the film in the conveyance direction of the film located below the folding plates against the folding plates from below; a moving mechanism configured to move a pair of clamps; and a control unit configured to control movement of the pair of folding plates. The control unit pre-stretches the film, by moving at least one of the pair of folding plates against which the film is pressed by the pair of clamps, in a direction in which a relative distance between the folding plates is increased.

A method of wrapping bundles is with stretch film from a reel. Bundles include products in transit through a wrapping machine including a wrapping unit having a ring winder which rotatably arranges stretch film around the bundles. During transit through the winding unit, the stretch film is unwound from the reel and passes through a pre-stretching group which generates axial deformation of the film predetermining an elastic return quantity. The axially deformed film interfaces with a vacuum having a vacuum box producing a constant auxiliary tensional stress on the pre-stretched film equal to the head inside the vacuum box. The film is then deposited on the bundles with a constant stress residue at each point of application of the pre-stretched film after adding the constant load generated by the vacuum box, producing bundles completely wrapped with a programmed stress residue.

A pre-stretching device (10) and a method for inserting a packaging film or other sheet material into the pre-stretching device, the pre-stretching device being suitable for being installed on a wrapping packaging machine that uses a packaging film (F) (specifically, a stretch film (F) or other sheet material) to wrap a load, the pre-stretching device comprising a support device (11) for a film roll (B) of the stretch film (F), a pair of pre-stretching rollers (13, 14) rotating around respective axes (X1, X2), and a quick insertion device (30) for inserting an edge of the packaging film (F) between the rollers of the pair of pre-stretching rollers (13, 14); the quick insertion device (30) comprising a flexible traction element (17) configured to advance along a path extending between the axes (X1, X2) and partially around them, thereby traction of the edge of the packaging film (F), the edge of the packaging film (F) being connected to the flexible traction element (17) by the rollers of the pair of pre-stretching rollers (13, 14) and a connecting element (20) arranged on the flexible traction element (17).

A method, apparatus and program product may utilize packaging material quality compensation to sense changes in certain characteristics of a packaging material that can be associated with increased risks of film breaks, and automatically make certain changes in machine settings to mitigate the impact of those enhanced risks.

A pre-stretching roller (1) of an unwinding apparatus associable to a wrapping machine, comprising a main body (2) elongated and manufactured by an extrusion process of a metal alloy; the main body includes a first tubular element (3) having a cylindrical shape and defining an external cylindrical wall (3a) suitable for interacting with a film; a second tubular element (4) internal to the first tubular element and having a first end (5) provided with a first seat (7) suitable for receiving and coupling with a driving shaft of driving means of the unwinding apparatus and an opposite second end (6) provided with a second seat (8) suitable for receiving and coupling with a supporting pin for fixing the pre-stretching roller to the unwinding apparatus; a plurality of longitudinal vanes (10) which connect the first tubular element to the second tubular element; the second tubular element comprises a plurality of longitudinal ribs (16), each of them being connected to a respective longitudinal vane.

A method of wrapping bundles is with stretch film from a reel. Bundles include products in transit through a wrapping machine including a wrapping unit having a ring winder which rotatably arranges stretch film around the bundles. During transit through the winding unit, the stretch film is unwound from the reel and passes through a pre-stretching group which generates axial deformation of the film predetermining an elastic return quantity. The axially deformed film interfaces with a vacuum having a vacuum box producing a constant auxiliary tensional stress on the pre-stretched film equal to the head inside the vacuum box. The film is then deposited on the bundles with a constant stress residue at each point of application of the pre-stretched film after adding the constant load generated by the vacuum box, producing bundles completely wrapped with a programmed stress residue.

The invention relates to a wrapping device (1) for wrapping pallets (P) loaded with articles with a film that can be pulled off a film reel (F). The wrapping device (1) has at least one support frame (3) with a wrapping arm (4) arranged thereon so as to be rotatable about a rotation axis (RA) and having an unwinding unit (5). The unwinding unit (5) of the rotatable wrapping arm (4) has at least one reel chuck (6) for supporting the film reel (F) and at least one roller arrangement (7) for guiding the film during wrapping. A lifting and lowering pressing device (10) is provided for holding the articles on the pallet (P), said pressing device having at least one pressing plate (12) with a lifting drive (14). The lifting drive (14) is formed by a pneumatic cylinder (16) with a cylinder piston (18) coupled to the pressing plate (12).which is arranged coaxially to the axis of rotation (RA) in its longitudinal extension and extends at least partially through a through opening (20) in the winding arm (4), and wherein the pneumatic cylinder (16) is arranged at its end (16.1) facing away from the pressure plate (12) in a rotationally fixed manner on the support frame (3).

An apparatus and method for stretch wrapping of a palletized load uses film tension feedback derived from a film tension control load cell to control film dispensation. The load cell measures film tension and the film payout rates is determined by the film tension. Film tension values are used to determine when an out of bounds condition occurs, namely, when a film break has occurred, or when a possible film break is about to occur or when the film has been cut at the end of a wrapping cycle. To prevent film free end entanglement caused by a break, clamps engage the film so the film tail is controlled, eliminating the risk of recoil. The broken film tail may then be quickly and reliably reattached to the rotating load in a desired position.

This invention discloses an apparatus and method for stretch winding palletized goods, using film tension feedback from a film tension control load sensor to control film distribution. The load sensor measures film tension, and the film release speed is determined by the film tension. The film tension value is used to determine when an out-of-range condition occurs, i.e., when film breakage occurs, when film breakage is likely, or when the film is cut at the end of the winding cycle. To prevent tangling of the free end of the film due to breakage, a clamp engages with the film, thereby controlling the film tail and eliminating the risk of retraction. The broken film tail can then be quickly and reliably reattached to the desired position of the rotating goods.

A self-propelled wrapping machine has a self-propelled carriage, an upright fixed to the carriage, slidably supporting a moving slide, and provided with a connection assembly, a first actuator arrangement to move the carriage around a load and the moving slide along the upright, and an unwinding unit provided with a reel of film and a roller assembly and including a quick coupling assembly selectively couplable to the connection assembly. The machine also has a main drive and control system configured to operate the first actuator arrangement and a complementary drive and control system configured to operate second and / or third actuator arrangements acting on the roller assembly and / or to receive and process signals relating to operating parameters of the unwinding unit from a sensor device thereof. The main and complementary drive and control systems are reversibly electrically connectable to each other to exchange control signals and transfer electric power supply.

An idle roller for pallet wrapping machine comprises a hollow cylindrical body (10) configured to rotate around an axis (12) and a load cell (20) provided with at least one rigid element (25) and at least one deformable element (26), a fixed support (14) coaxial to the cylindrical body (10) and integral with the structure of a carriage configured to support at least one roll of plastic film, connecting means (16) between the cylindrical body (10) and the load cell (20), the load cell (20) being interposed between the cylindrical body (10) and the support (14) and being configured to detect the pressure difference exerted by the plastic film on the cylindrical body (10) and on the support (14).

Perforated stretch film tube for forming a perforated stretch film hood. A length of flattened stretch film with a thickness of between.0025 and.0055 or larger is perforated after extrution and wound around a core to form a roll of perforated stretch film tube with a plurality of perforations spaced spaced by at least an inch and having a diameter of less than ½ inch. The roll is loaded into a palletized load hooder machine, opened with gripping arms, sealed and cut at one end to form a pallet hood, and drawn down over the palletized load and released to secure the load to the pallet.

The invention relates to a winding device (1) for winding a film, which can be pulled from a film reel (F), around pallets (P) loaded with articles, wherein the winding device has at least one support frame (3) with a winding arm (4) which is arranged to rotate on said support frame about an axis of rotation (RA) and has an unwinding unit (5), wherein the unwinding unit (5) of the rotatable winding arm has at least one reel chuck (6) for receiving the film reel (F) in a supporting manner and at least one roll arrangement (7) for guiding the film reel during winding, wherein for holding the articles on the pallet (P) a pressing device (10) is provided, which can be moved up and down and has at least one pressing plate (12) with a lifting drive (14), wherein the lifting drive (14) is formed by a pneumatic cylinder (16) which is coupled to the pressing plate (12) and has a cylinder piston (18) which is arranged in its longitudinal extent coaxially with respect to the axis of rotation (RA) and extends at least in some sections through a passage opening (20) in the winding arm (4), and wherein the pneumatic cylinder (16) is arranged in a rotationally fixed manner on the support frame (3) at the end (16.1) of the pneumatic cylinder remote from the pressing plate (12).

A packaging material dispenser of a stretch wrapping machine supports multiple discrete amounts of pre-stretch in a reliable and cost-effective manner in part by incorporating a loop drive assembly with multiple pre-stretch rate wheels capable of being used to drive a driven wheel associated with a pre-stretch roller at different discrete rates of rotation relative to another pre-stretch roller.

The invention relates to a method of controlling a load wrapping apparatus of the type configured to wrap a load on a load support with packaging material dispensed from a packaging material dispenser through relative rotation between the packaging material dispenser and the load support, the method comprising determining a density parameter for the load prior to wrapping the load; and controlling one or more control parameters for the load wrapping apparatus when wrapping the load based upon the determined density parameter for the load

The present invention relates to an unpacking system (100) comprising a unfolding device (60) for unfolding a previously folded packaging section (16) of a package (12) for an object (14) and a stretching device (10) for stretching a package (12) for an object (14). The package (12) is, in particular, a pouch, and the object (14) is, in particular, a pharmaceutical or cosmetic object. The unpacking system (100) further comprises a transport device (18) for transporting the object (14) in a transport direction (20). The packaging section (16) is stretched in the stretching device (10) parallel to the transport direction (20). The present invention further relates to a filling system (140) comprising such an unpacking system (100). The present invention further relates to a method (180) for unfolding, a method (160) for stretching, and a method (200) for unpacking.

A system includes a wrapping machine for dispensing film to wrap a load disposed on a pallet, a plurality of sensors configured to detect operation of the machine, and a controller operably and communicatively connected with the sensors. The controller is configured to establish desired values of operating parameters of the machine, the parameters including a wrap pattern, weight of the film, a number of revolutions, a percent of stretch of the film, and a tension of film, during operation of the machine, monitor actual values of the operating parameters using data from the sensors, and in response to a difference between the desired values and the actual values being greater than a threshold, issue a command to adjust operation of the machine such that the difference is less than the threshold.

The agricultural bale wrapper comprises a bale support for supporting and rotating the bale 2 about a first axis, X, a film dispenser holding a roll 8 of stretch film 10, means configured to provide relative rotation between the bale support and the film dispenser about a second axis, Y, that extends substantially perpendicular to the first axis, so that the stretch film 10 forms a bale wrapping that substantially completely covers the bale, at least one film pre-stretcher unit 9a configured to pre-stretch the stretch film by an elongation amount before the stretch film is applied to the bale, the at least one film pre-stretcher unit comprises at least two pre- stretcher rollers 3, 7 configured to perform elongation of the stretch film, the at least two pre-stretcher rollers are configured to rotate relative to each other with a predetermined angular speed ratio 5 and the stretch film is drawn over the surfaces of the at least two pre-stretcher rollers, the ratio of the circumferential speeds of the at least two pre-stretcher rollers varies over the width, W, of the stretch film. At least one of the two pre-stretcher rollers may have a larger diameter in the middle of the roller than the diameter at the ends of the roller. The variation of ratio of the circumferential speed ratio may be adjusted based on the type of stretch film or the shape and / or size of the bale. Also disclosed is a method for wrapping an agricultural bale.

An unwinding apparatus (1) associable with a wrapping machine (100) in order to deliver a film or strip (50) made of plastic and / or paper material with which to wrap a load (200), comprises a supporting frame (2) for rotatably supporting a reel (60) of film or strip (50), roller means (10) for unwinding the film or strip (50) from the reel (60) and guiding it out towards the unwinding apparatus (1) and the load (200), blowing means (20) arranged to deliver at least one air blow (F) towards the roller means (10) so as to keep the film or strip (50) outstretched, wound on and adhering to the roller means (10); sensor means (18) for detecting a pulling force acting on the film or strip (50) and control means (19) connected to the sensor means (18) and configured to activate the blowing means (20) and deliver the air blow (F) towards the roller means (10) when the pulling force of the film is lower than a predefined minimum value.

An orbital stretch wrapping apparatus is provided and includes a base frame, a circular ring mounted on the base frame and rotatable with respect to the base frame about an axis of rotation, a stretch film dispenser mounted on the circular ring and rotatable with the circular ring about the axis of rotation, the stretch film dispenser having a subframe fixed to the circular ring, a roll of stretch film mounted to the subframe and rotatable with respect to the subframe, a first feed roller mounted to the subframe and rotatable with respect to the subframe, a second feed roller mounted to the subframe and rotatable with respect to the subframe, and a brake member connected to the first feed roller and the second feed roller.

A machine is for packaging products, such as bottles and other containers, in bundles. An apparatus for packaging products in bundles includes a conveying system for the products, crossing in the following order: a separation station for separating the products into a sequence of groups, a wrapping station for wrapping the groups in sequence in a continuous tube of pretensioned extensible plastic film, a cutting station for cutting the continuous tube of pretensioned extensible plastic film to form bundles of the products wrapped in the pretensioned extensible plastic film. The separation station includes a spacing member for spacing products to form groups and a stabilization member for stabilizing spacing between the groups including a first gripper device and a second gripper device. The gripper devices are configured to move and insert spacers into the space formed by the spacing member between two groups of products.