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US 4,300,608 AGranted
Self-raising strap loop
AssigneeBonar Industries Inc.
InventorBruce Cuthbertson
Life of this patent
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AssigneeBonar Industries Inc.
InventorBruce Cuthbertson
Estimating the term…
A self-raising strap loop is described, for use with a flexible, stackable container. The strap loop includes a strap which is flexible, and resilient means associated with the strap so that when the container is subjected to stacking forces the strap loop will lie substantially flat on the container, but when the stacking forces are removed, the loop will be forced to assume an upstanding position ready to receive a lifting device such as a fork of a fork-lift truck. The resilient means may be a resilient plastics or metallic insert enveloped by the strap, either in the form of a flat strip or a plurality of wires. The resilient means may also take the form of plastics or metallic wires woven into or being the warp threads of a woven strap. The resilient means may also be an impregnating material within a woven strap to render it semi-rigid. By using the self-raising strap loop it becomes unnecessary to pre-orient a lifting strap prior to engagement with a suitable lifting device.
A self-raising strap loop for a stackable, flexible container subjectable to lifting forces, comprising a flexible strap member connectable at each end thereof to said container, with a bight portion defined between the ends and resilient means associated with said bight portion over a substantial portion of the length thereof, whereby when connected to a container and subjected to stacking forces said resilient means will permit said loop to flex so as to lie substantially flat on said container and, when such stacking forces are released, said resilient means will cause said loop to raise to an upstanding position to accept a lifting member therein.
In a flexible stackable container capable of being lifted by mechanical means and defined by at least an encircling side wall portion and a bottom wall portion, the improvement comprising at least one self-raising strap loop connected to said container, said strap loop comprising a flexible strap member having end portions and a bight portion between said end portions, said end portions being secured to said container side wall portion, and resilient means associated with said bight portion over a substantial portion of the length thereof, whereby when said container is subjected to stacking forces the resilient means will flex to permit the strap loop to lie substantially flat on said container and, when such stacking forces are released, the resilient means will raise the loop to a position to accept the mechanical lifting means.
In a flexible stackable container capable of being lifted by mechanical means, and having a generally rectangular configuration defined by two pairs of opposed side wall portions and a bottom wall, the improvement comprising a self-raising strap loop extending along each of two of said opposed wall portions adjacent the upper margin of said container, each loop comprising an extension of the corresponding wall portion with the extension being looped back and connected to the corresponding wall portion to define a bight portion, and, adjacent each end of each elongated strap loop, a resilient insert secured to the bight portion of the loop over a substantial portion of the length of the bight portion, whereby when said container is subjected to stacking forces the resilient inserts will flex to permit the strap loops to lie substantially flat on said container and, when such stacking forces are released, the resilient inserts will raise the loops to a position to accept the mechanical lifting means.
Dependencies are inferred from the claim text.