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U-shaped closing staple used for a back and a flexible tube, a closing device for closing a bag and a flexible tube using the U-shaped closing staple, and a U-shaped closing used for the closing device Combination structure with staples
U-shaped closing staple used for a back and a flexible tube, a closing device for closing a bag and a flexible tube using the U-shaped closing staple, and a U-shaped closing used for the closing device Combination structure with staples
In U-shaped closing staples for bags and flexible tubes, which staples are made of strip material and consist of a crosspiece (7) and two legs (4) and in which the leg ends of the staple have been bent off outwardly to constitute a connecting web (2), by which the staple is severably included in a train (1), the severing of each staple from the train (1) will result at the severing location in the formation of burrs, which protrude beyond the strip width of the staple and may result in damage to the closed wrapper and to other wrappers. An apparatus for closing bags and flexible tubes by means of such closing staples comprises a closing punch (9), which acts on a die (8) and is formed in its active surface (29) with a groove (10), which has the same width as the closing staple and has a depth which is smaller than the total thickness in which the legs are subjected to the closing operation. During the closing operation the side wall faces of the groove (10) guide the leg ends (6) and ensure that the staple leg ends (6) firmly engaging the staple legs (4) on the outside will be embossed without a formation of a burr.
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