Buckles – buttons – clasps – etc. – Bag fasteners – Resilient slot bag tie
Patent
1996-02-05
1998-04-07
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Bag fasteners
Resilient slot bag tie
24543, B65D 7700
Patent
active
057350221
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a plastic clip which serves to close sausage casings, bags or the like and consists of two parts, which embrace the casing end when it has been gathered to form a tip and which can be interlocked in that a first part having a receiving space that is defined by side cheeks and cross-flanges partly embraces the tip and a second part bridges the cross-flanges of the first part and at its one transverse end is hinged by a film hinge to the corresponding transverse end of the first part and has an extension which in the closed clip extends under a portion of the first part and adjacent to its other transverse end has a detent element, which cooperates with a complementary detent element of the first part. The invention relates also to an apparatus for closing such a clip or a plurality of such clips, which are connected in a chain.
U.S. Pat. No. 4,273,486 discloses a plastic clip which is of that kind and in its closed state has the shape of a substantially hollow cylinder and is split along a plane which is parallel to the axis of the clip. A rib of the second or cover part protrudes toward the receiving space in the larger first part but only spikes provided on said rib reach the passage for the tip material, which passage is defined at its top by the end wall. During the closing of the clip an extension which is provided on the rib of the second part and extends toward the film hinge is pivotally moved into a recess, which is formed in the cylindrical outer wall, which like cross-flange defines the cylindrical receiving space between the side cheeks, so that the parts are interlocked as by a hinge. On the opposite side, a detent hook formed on the second part extends into a locking opening the cylindrical outer wall, which constitutes there an oppositely disposed cross-flange.
Because in contrast to the plastic clip disclosed in EP-A-356 850 the two parts are additionally interlocked adjacent to the film hinge, it is possible mainly to exert a stronger closing force on the tip of the sausage casing or the like. But it is unsatisfactory that the interlock is very rigid and, e.g., does not permit an elastic yielding of the clip, e.g., when pressure peaks occur at the clip, e.g., as a result of a heat treatment of the contents of the package and such pressure peaks must be dissipated by ventilation. Similar remarks are applicable to the adaptation to different tip thicknesses.
The problems outlined hereinbefore are avoided by the invention in that the side cheeks of the first part are connected by a cross-bar, which is spaced from the cross-flange that is close to the hinge, and the second part is provided with an arm, which is spaced a corresponding distance from the film hinge and in the closed clip extends between the cross-flange and the cross-bar and under the crossbar. In cooperation with the cross-bar the arm ensures a reliable guidance of the two parts or the clip during the closing operation and by the positive joint in the closed clip ensures the transmission of a strong closing force adjacent to the hinge. Above all, because the positive joint is spaced from the receiving space the closed clip has in spite of its ability to transmit a strong closing force an adequate elasticity in case of different and/or changing stresses.
The new plastic clip is preferably so designed that the first part comprises side cheeks, which extend transversely to the longitudinal direction of the tip and have centrally disposed, aligend U-shaped recesses, and the second, which substantially covers the receiving space, is integrally formed with a projection that consists of a rib, which is parallel to the side cheeks and protrudes into the receiving space, so that the tip will be deflected in the shape of a wave and will be under a closing pressure when the clip is closed and interlocked.
A clip having such a design is basically known from WO 93/10012. One embodiment consists of two identical parts, which are turned through 180.degree. relative to each other and are interlocked. Another embodiment
REFERENCES:
patent: 3247852 (1966-04-01), Schneider
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patent: 4386752 (1983-06-01), Pavlak et al.
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patent: 4775121 (1988-10-01), Carty
patent: 4847956 (1989-07-01), Levine
patent: 5008980 (1991-04-01), Zimmermann
patent: 5125133 (1992-06-01), Morrison
patent: 5263671 (1993-11-01), Baum
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