Abstract: A feed system for a strapping machine automatically detects a strap error or fault, stops strap retraction or take-up and refeeds the strap into the strapping head following that error or fault. The system is used in a strapping machine of the type having a strap supply, a strap chute and a strapping head disposed between the supply and the chute. The feed system includes a strap path from the supply to the head, a pair of tensioning wheels disposed along the strap path proximal the strap supply and a pair of feed wheels disposed along the strap path proximal the strapping head. The feed wheels define a nip therebetween. A feed wheel drive is operably connected to one of the feed wheels and a tensioning wheel drive is operably connected to one of the tensioning wheels. A sensor is disposed along the strap path for generating a signal to indicate a movement or a lack of movement of the strap along the strap path.

Abstract: A strapping machine configured to feed a strapping material around a load, position, tension and seal the strapping material around the load, includes hinged, readily removable in-feed and out-feed work surfaces with integral conveyors. The strapping machine includes a machine frame, the in-feed and out-feed work surfaces mounted to the frame and a strap chute mounted to the frame for carrying the strap around the load and for releasing the strap material from the strap chute. A feed assembly and a weld head are disposed below the work surfaces. The in-feed and out-feed surfaces are on opposite sides of the strap chute and are separated from one another by a lower portion of the chute. Integral conveyors for in-feeding the load into the strapping machine and for out-feeding the load from the strapping machine are formed in the work surfaces. The work surfaces are hingedly mounted for pivoting upwardly and outwardly for maintenance of the machine and for removing the surfaces and conveyors from the machine.

Abstract: A strap path access guide is configured for use in a strapping machine of the type having a feed assembly a chute and a strapping head disposed between the feed assembly and the chute. The strapping machine is configured to receive first and second courses of associated strap material, position, tension and seal the strap material around a load. The strap path access guide is disposed along the feed assembly between a pair of tensioning wheels and the strapping head. The strap path access guide includes a fixed lower guide portion extending between the tensioning wheels and the strapping head. The fixed lower guide portion defines a lower surface of the strap path. A pivotable upper guide portion is pivotable about a pivot that is spaced from and rearwardly beyond the tensioning wheels. The upper guide portion is pivotable between a closed position in which the upper and lower guide portions cooperate with one another to define the strap path and an open position in which the strap path is fully accessible.

Abstract: A strapping machine for positioning a strap material around an associated load, tensioning the strap material and sealing the strap material to itself around the load, the strapping machine includes a strap path formed from opposing, movable elements. The machine includes a frame, a slack box, and a first portion of a strap path from the slack box. The first portion of the strap path is formed by a pair of opposing path forming elements moveable toward and away from each other between an open path position and a closed path position. The path forming elements further define a path entrance and a path exit, The closed path position defines the first portion of the strap path. A strapping head is mounted to the frame and is configured to convey the strap material in a first direction to position the strap material around the load and to convey the strap material in a second direction to tension the strap material around the load.

Abstract: A reentry gate assembly is for use with a strapping machine of the type having a feed assembly, a chute and a strapping head. The reentry gate assembly directs returning strapping material into the strapping head and releases the strapping material therefrom to prevent the strap from becoming caught as it is pulled from the chute. The reentry gate assembly includes a body having a strap path surface and first and second pivotable gates movable between a closed position in which the gates overly the strap path surface and define a strap pathway, and an open position in which the gates are pivoted away from the strap path surface. A link operably connects the first and second gates. When strapping material present in the strap pathway with the gates closed is urged outwardly of the strap pathway, contact of the strapping material with either the first or second gate moves the link to open the other of the first or second gate, so that both gates open together.

Abstract: A clearing and reloading assembly is configured for use with a strapping machine of the type having an infeed arrangement at about a strap material inlet to the machine, a feed assembly and a chute, the strapping machine defining a strap material holding region between the infeed arrangement and the feed assembly. The strapping machine is configured to receive first and second courses of associated strap material, position, tension and seal the strap material around a load. The clearing and reloading assembly includes a body, a driven wheel and a bearing element opposite of the driven wheel. The bearing element and the driven wheel define a strap path therebetween. A strap cutter is disposed for movement into and out of the strap path. A first peripheral portion of the driven wheel is configured to define a gap between the first portion and the bearing element such that the strap material can slip therebetween.

Abstract: A strapping machine configured to position a strap material around an associated load when in a feed mode and to tension the strap material and seal the strap material to itself around the load when in a tensioning mode includes an improved winder assembly. The machine includes a flame, a strap material supply and a strapping head. A strap path is defined from the strap material supply to the strapping head. The strapping head includes a feed element for conveying the strap material during the feed mode in a first direction around the load and for conveying the strap material in a second, opposite direction to tension the strap material around the load. The strapping head includes a rotating winder for tensioning the material around the load. The winder has a peripheral strap path and a central strap path.

Abstract: A gripper assembly for a strapping head for a strapping machine includes a body having a generally rectangular cross-section and defining a cavity therein having an end wall. The body has a gripping pad on an exterior portion thereof. The body further includes pin openings in opposing walls. A single spring stack is disposed in the cavity. An end of the spring stack abuts the inner end wall of the body. A follower block is positioned in the cavity. The follower block has a base and a roller support portion. The roller support portion has pin openings therein. A roller is positioned in the roller support portion. The roller has a passage therethrough. A retaining pin is disposed through the body pin openings, the follower block pin openings and the roller passage. The retaining pin is disposed to maintain the follower block within the body cavity with the roller secured thereto and to maintain the spring stack captured within the body cavity.

Abstract: A self-cleaning limit switch is for use in a strapping machine of the type configured to convey strapping material around a load, receive first and second courses of the strapping material, position, tension and seal the strapping material around a load. The strapping machine includes a strapping head having internal and external limit switch channels formed therein. The limit switch includes a sliding element having internal and external sliding portions rigidly connected to one another. The internal sliding portion is positioned in the strapping head internal limit switch channel and the external portion is positioned in the strapping head external limit switch channel. The internal and external sliding portions include an inclined surface at a rearward end thereof and upstanding walls at a forward end thereof. The internal sliding portion has a lip for engaging the second course of strapping material. The external sliding portion includes a position indicating element thereon.

Abstract: A dispenser assembly for a strapping machine of the type having a frame supporting a feed assembly, a chute and a strap supply provides ready accessibility and ease of loading or reloading a coil of strap material in the machine. A strapping machine includes a strapping head disposed between the feed assembly and the chute. The machine is configured to receive first and second courses of associated strap material, position, tension and seal the strap material around a load. The strap material is provided on a coil having a axis of rotation about which the coil rotates to dispense the strap material. The dispenser assembly includes a support panel hingedly mounted to the frame that is pivotable between an open position and a closed position. The support panel includes a central hub defining an axis for carrying the coil of strap material.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load, includes a modular strapping head and a modular feed assembly. The strapping head and feed assembly are readily installed on and removed from the strapping machine without tools. The Strapping machine includes a frame, a chute mounted to the frame and defining a strap path, the feed assembly mounted to the frame by a first aligning and mounting assembly, the strapping head assembly mounted to the frame by a second aligning and mounting assembly independent of the first mounting assembly, and a guide mounted to the frame adjacent the feed assembly. Both the feed assembly and the strapping head are independently removable from the frame.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load includes a frame, a chute mounted to the frame for conveying the strapping material around the load, a feed assembly mounted to the frame for feeding the strapping material, a guide configured to transfer the strapping material from the feed assembly and a strapping head. The head is configured to receive the strapping material from the feed assembly via the guide during a feed mode. The strapping head includes a body and defines a first conveyance path for the strapping material from the guide to the chute, and a second conveyance path to receive a free end of the strapping material to seal the strapping material to itself. The second conveyance path is defined by a plurality of surfaces in the body that define a substantially constant width path through the second conveyance path.

Abstract: A winder for a strapping machine that positions a strap material around a load and tensions the strap material around the load includes a rotating head portion having a stationary element and a pivotal element. The elements each define an outer surface around which the strap material is wound and a slot therebetween for receiving the strap material. The elements each include a gripping portion at about respective ends opposingly facing one another. The pivotal element pivots between an open position in which the gripping portions are spaced from one another and a closed position in which the gripping portions cooperate with one another to engage and secure the strap material. The winder includes a pivot assist assembly to urge the winder to the closed position. A strapping machine and a strapping head are also disclosed.

Abstract: A strapping machine for positioning a strap material around an associated load and tensioning the strap material around the load includes a frame for supporting the load, a chute positioned on the frame for receiving the strap material and orienting the strap material around the load, a strap supply and a strapping head for extracting the strap from the supply, feeding the strap through the chute around the load, passing the strap from the chute around the load, retracting and tensioning the strap. The strapping head includes feed rollers and retraction rollers for feeding and retracting the strap and a winder for tensioning the strap around the load. The winder is positioned between the feed and retraction rollers and the strap supply. The winder includes a rotating head portion having a stationary element and a pivotal element. The stationary and pivotal elements each define an outer surface around which the strap material is wound and a slot therebetween for receiving the strap material.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load, includes a modular strapping head and a modular feed assembly. The strapping head and feed assembly are readily installed on and removed from the strapping machine without tools. The Strapping machine includes a frame, a chute mounted to the frame and defining a strap path, the feed assembly mounted to the frame by a first aligning and mounting assembly, the strapping head assembly mounted to the frame by a second aligning and mounting assembly independent of the first mounting assembly, and a guide mounted to the frame adjacent the feed assembly. Both the feed assembly and the strapping head are independently removable from the frame.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load, includes a frame, a feed assembly mounted to the frame for feeding, retracting and automatically refeeding the strapping material, a guide configured to receive the strapping material from the feed assembly, and a strapping head configured to receive the strapping material from the feed assembly via the guide and to position the strapping material around the load and seal the strapping material to itself around the load. The feed assembly includes one and only one pair of reversible feed elements and a drive. The machine includes a controller operably connected to the drive. The one and only one pair of reversible feed elements are configured to automatically feed, retract and refeed the strapping material upon an appropriate signal from the controller.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load, includes a modular strapping head and a modular feed assembly. The strapping head and feed assembly are readily installed on and removed from the strapping machine without tools. The Strapping machine includes a frame, a chute mounted to the frame and defining a strap path, the feed assembly mounted to the frame by a first aligning and mounting assembly, the strapping head assembly mounted to the frame by a second aligning and mounting assembly independent of the first mounting assembly, and a guide mounted to the frame adjacent the feed assembly. Both the feed assembly and the strapping head are independently removable from the frame.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load includes a frame, a chute mounted to the frame, a feed assembly mounted to the frame a guide mounted to the frame adjacent the feed assembly and a strapping head mounted to the frame independent of the feed assembly and the guide. The feed assembly is configured to feed the strapping material therethrough. The guide receives the strapping material from the feed assembly and provides a path for the strapping material toward the strapping head. The strapping head includes a body and provides a first conveyance path for the strapping material from the guide to the chute. The head includes a second conveyance path to receive a free end of the strapping material to seal the strapping material to itself. The strapping head has an anvil pivotally mounted to the body that forms a part of the second conveyance path.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load, includes a modular strapping head and a modular feed assembly. The strapping head and feed assembly are readily installed on and removed from the strapping machine without tools. The Strapping machine includes a frame, a chute mounted to the frame and defining a strap path, the feed assembly mounted to the frame by a first aligning and mounting assembly, the strapping head assembly mounted to the frame by a second aligning and mounting assembly independent of the first mounting assembly, and a guide mounted to the frame adjacent the feed assembly. Both the feed assembly and the strapping head are independently removable from the frame.

Abstract: A strapping machine for positioning a strapping material around an associated load and sealing the strapping material to itself around the load, includes a modular strapping head and a modular feed assembly. The strapping head and feed assembly are readily installed on and removed from the strapping machine without tools. The Strapping machine includes a frame, a chute mounted to the frame and defining a strap path, the feed assembly mounted to the frame by a first aligning and mounting assembly, the strapping head assembly mounted to the frame by a second aligning and mounting assembly independent of the first mounting assembly, and a guide mounted to the frame adjacent the feed assembly. Both the feed assembly and the strapping head are independently removable from the frame.