Abstract:
A clamp assembly (106) may include a first jaw member (108) which may have a selectively inflatable bladder (114). In addition, the clamp assembly (106) may further include a second jaw member (110) which may have a belt (128). The first jaw member (108) and the second jaw member (110) may be configured to clamp material between the selectively inflatable bladder (114) and the belt (128).
Abstract:
A palletizer for automatically building a load with product from an infeed area is disclosed. It includes means for defining a desired volume of a load including a length sensor, a width sensor, and a height sensor. It also includes means for transporting product from an infeed area to the load. A controller is associated with means for defining the desired volume, the controller being configured to receive signals from the sensors and to automatically control movement of the means for transporting. The controller is configured to automatically determine when the volume is filled. In another aspect, a method of building a load with product from an infeed area is provided. The method includes defining a desired volume of the load using a length sensor, a width sensor, and a height sensor. It also includes automatically filling the volume with product, and determining when the volume is filled.
Abstract:
A method and apparatus for providing corners of a load (110) with cornerboards (152) prior to wrapping the load is provided. The method may include providing a load on a load transport surface, removing a cornerboard from within a magazine (150) by a gripper (170), and transporting the cornerboard to a corner of the load with the gripper. Relative rotation may be provided between the stretch wrap packaging material dispenser and the load to wrap the stretch wrap packaging material around the cornerboard and the load. If the cornerboard is not pre-formed, it is folded prior to transport to the load. The cornerboard is secured to the corner of the load with the stretch wrap packaging material. In a preferred embodiment, four magazines and four grippers are provided, such that four cornerboards can be carried to the load at the same time.
Abstract:
A method and apparatus for securing a final tail of film to a wrapped load are provided. The method includes dispensing a film web from a dispenser (102) and providing relative rotation between the load and the dispenser (102) to wrap the film web around the load. A blower (160) is actuated and applies a stream of air to the film web as the film web extends along a film path between a corner of the load and the dispenser. While applying the stream of air to the film web, the film web is weakened between the corner of the load and the dispenser (102) and then severed, and the final tail of film is secured to the load with the stream of air.
Abstract:
A method and apparatus for securing an initial tail of film to a load while wrapping the load with packaging material are provided. The method includes holding a leading end (30) of packaging material (116) while providing relative rotation between the load (124) and the dispenser (102) to wrap film around the load. A portion of the leading end of film is secured to a fixed wrapping structure (130) while the leading end of the film is held. After the leading end is secured to the fixed wrapping structure, the leading end of the film is released. The released leading end of the film is then secured to the load. The apparatus includes means (111) for holding a leading end of packaging material and means for providing relative rotation between the load and a dispenser to dispense packaging material. The apparatus also includes means for securing a held leading end of packaging material and means for securing a released leading end of packaging material between two layers of packaging material. A method and apparatus for securing a final tail of film to the load also are provided.
Abstract:
An apparatus (100) for wrapping a load (138) with packaging material (142) may include a packaging material dispenser (140) for dispensing packaging material. The apparatus may also include a relative rotation assembly (129) for providing relative rotation between the load and the packaging material dispenser. The apparatus may further include a mechanical connection (133) operatively coupling the packaging material dispenser to the relative rotation assembly. The relative rotation assembly may be configured to drive the packaging material dispenser through the mechanical connection. The apparatus may further include a force exerting mechanism (181) operatively coupled to the mechanical connection. The apparatus may further include a sensing element (194) configured sense a characteristic of dispensed packaging material. The sensing element may be operatively coupled to the mechanical connection. The force exerting mechanism and the sensing element may be configured to control the mechanical connection to maintain a selected ratio of packaging material dispensed to demand for packaging material at the load for at least a portion of a wrap cycle.
Abstract:
A method and apparatus for wrapping the load at a desired wrap force are provided. The apparatus includes a dispenser (102) for dispensing packaging material and means for providing relative rotation between the load and the dispenser. The dispenser has a prestretch portion (110) and a post-stretch portion (160). The prestretch portion is configured to prestretch the packaging material within the dispenser to a point below the yield point of the packaging material. Preferably the packaging material is prestretched between first and second unpowered prestretch rollers. The post-stretch portion is configured to further stretch the prestretched packaging material to a point above the yield point of the packaging material as the packaging material moves from the dispenser to the load. Preferably, the post-stretch portion includes a friction element, such as a brake (170), to apply friction to one of the prestretch rollers (118).
Abstract:
The present invention relates to an apparatus and method for stretch wrapping a load in an efficient manner so as to tightly and securely wrap the load at a desired tension without rupturing the packaging material. The method and apparatus compensate for variation in demand rate as the load is wrapped so as to apply the wrapping material (116) to a load (124) at a desired force, maintain the desired containment tension on the wrapping material on the load after wrapping, and prevent the wrapping material from rupturing during wrapping. The apparatus combines two systems, power assisted roller stretch ("PRS") and roller stretch ("RS") to vary the supply rate of the packaging material as the demand rate varies. The apparatus automatically switches between the two types of prestretch to achieve "high" and "low" wrapping force dependent upon the demand rate. Changes in the demand rate are sensed by monitoring changes in the payoff angle of the packaging material extending between the dispenser (102) and the load.
Abstract:
A method and apparatus for providing corners of a load with cornerboards prior to wrapping the load is provided. The method may include providing a load on a load transport surface, removing a cornerboard from within a magazine by a gripper, and transporting the cornerboard to a corner of the load with the gripper. Relative rotation may be provided between the stretch wrap packaging material dispenser and the load to wrap the stretch wrap packaging material around the cornerboard and the load. If the cornerboard is not pre-formed, it is folded prior to transport to the load. The cornerboard is secured to the corner of the load with the stretch wrap packaging material. In a preferred embodiment, four magazines and four grippers are provided, such that four cornerboards can be carried to the load at the same time.
Abstract:
A wrapping apparatus (100) and method utilize a corner rotation angle-based wrap control that controls the rate at which packaging material (108) is dispensed based on the rotational position of one or more corners of the load (110) during relative rotation established between the load and a packaging material dispenser (106). The locations of one or more corners on a load may be sensed or otherwise calculated, and when combined with a sensed or calculated rotational position of the load relative to a packaging material dispenser, the locations of the corners relative to the packaging material dispenser may be determined and utilized to control the dispense rate of the packaging material dispenser, e.g., by determining which corner is currently driving an effective consumption rate of the load and/or determining when to apply a controlled intervention to the load.