Means for clasping the extremities of the metal sheet forming ti

Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – Metal bands

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Details

24 19, 24 20EE, B65D 6300, F16L 4700

Patent

active

057405891

DESCRIPTION:

BRIEF SUMMARY
The subject of the present invention patent concerns improvements to means for fastening the ends of the sheet metal forming clips made of metal strip.
At present, clips are known which consist of a metal strip, of the type which at one end has a fastening guide tongue, while at the opposite end of the said metal strip there are hooks provided near one end of the strip, while at the opposite end are the engagement openings, being complementary to one another so that once the metal strip is coiled onto itself it remains closed, forming a ring.
This is the case with Spanish Utility Model No. 42.946, of Jose Montaner Genesca, dated 1954, for "IMPROVED COLLAR FOR PIPES".
It is also to be found in Utility Model No. 149.843 of Juan Gomez Larios, dated June 1969, for
Utility Model No. 260.128, of Hans Oetiker, A. G., dated 31.8.81, for "CLIP ARRANGEMENT FOR HOSE PIPES"
Utility Model No. 257.616 of Hans Oetiker A. G., dated 7.5.80, for "CLIP ARRANGEMENT FOR HOSEPIPE".
These metal strips forming the clips also have projecting portions defined by an inverted "U"-shape, arranged in the circumferential direction of the clip. These parts in the shape of an inverted "U", also commercially called "lugs", are intended to allow the clip to be constricted by means of pliers, the jaws pressing one in the opposite direction to the other in order to effect deformation of the said inverted "U" by pressing radially against the inserted pipe.
This embodiment of the "lugs" belongs in the public domain and they have been known since 1958 according to U.S. Pat. No. 3.020.631, of E. R. Kennedy, for "Method for making pipe clips".
U.S. Pat. No. 3.106.757, dated 1961, of R. L. Thurston and coll.
However, in this type the alignment of the ends needs to be more precise in order to obtain greater and more correct constriction.
Included in the known type of clip with a tongue mentioned above, there are also others which have guide means to avoid such lateral deviation.
This is the case with Utility Model No. 119.952, dated 1966, of Emilio Valls and Enrique Prats.
In order to prevent the tongue from protruding beyond the level of the surface of the end of the superposed strip, there are also provided chambers for receiving the tongue, as is the case with Utility Model No. 149.843 and Utility Models No. 260.128 and No. 257.616.
Likewise, it is known in industry to join metal sheets, by means of the juxtaposition of two sheets, in which sheets there is made a through, transverse hole, common to both, and then a metal eyelet is introduced which is clinched.
This operation is similar to that carried out in order to fasten, at the folded end of a trouser belt, the corresponding metal buckle.
However, in the case of the ends of the belts, when folded onto themselves and with the bar of the buckle threaded on transversely, the joining of the fold for mounting the buckle does not present the same problem as when it is a question of joining two overlapping metal ends of the metal strip which constitutes the clip.
In the first place, the reaction of separation from each other of the two ends of the ring which constitutes the metal clip is much greater than that provided by the folding of the end of the leather strap which forms the belt.
Therefore when joining the folded leather end of the belt there is not created such a pronounced separation force as when there are coupled to each other, under pressure, the two ends of the curved metal strip by which curvature the metal strip is converted into an expanding spring.
In addition, in the leather material which forms the belt, the trim which surrounds the hole of the actual eyelet and which is fitted against the surface of the folded leather end, owing to its softness, makes it possible, when the ends of the eyelet are pressed with the clamping pliers, for the edge of the trim to be embedded in the leather material.
However, this does not happen in the case of ends of metal strip having a hard surface.
In this type of joining of superposed ends by means of an eyelet, neither is it of any importance that

REFERENCES:
patent: 2321755 (1943-06-01), Kost
patent: 3353227 (1967-11-01), Kabel
patent: 4299012 (1981-11-01), Oetiker
patent: 4622720 (1986-11-01), Oetiker
patent: 4724583 (1988-02-01), Ojima
patent: 4836705 (1989-06-01), La Barge et al.
patent: 4890360 (1990-01-01), Calmettes et al.
patent: 5051020 (1991-09-01), Schleicher
patent: 5111555 (1992-05-01), Oetiker
patent: 5251360 (1993-10-01), Putz
patent: 5305499 (1994-04-01), Oetiker
patent: 5339496 (1994-08-01), Oetiker

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