Chain of closure clips and device and process for closing its cl

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

Patent

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Details

24 305R, 24 16PB, 206340, B65D 3316, A43C 700

Patent

active

058528504

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a chain of interconnected closure clips, designed for the necks of bags and tubes, having a uniform cross-sectional profile and two free ends lockable together to close the closure clip.
The invention further relates to a device for closing closure clips with interlockable free ends, especially such as those of a closure clip chain according to the present invention. Furthermore, the invention includes a method of closing closure clips, especially such as those in a chain according to the present invention.
A chain of closure clips is already known from U.S. Pat. No. 3,818,553. However, the closure clips in the chain described therein comprise some considerable disadvantages. Thus, their two legs have to be swivelled by a relatively large angle for closure of a closure clip. In the area of the closure clip serving as a swivel axis said clip is consequently considerably weakened.
Furthermore, the closure clips in a chain are connected by a plurality of webs and otherwise comprise definite holes between said webs. These holes arise from punching effected after extrusion of the profile for the closure clip chain. The punched-out material constitutes undesirable waste. Moreover, the individual closure clips cannot be so very easily separated from each other owing to the plurality of connecting webs. Furthermore, the webs which remain damage the material of the neck of the bag upon closure of the closure clip.
A decisive disadvantage of all closure clips known hitherto consists in the fact that they are only inadequately suited to automatic supply and processing in automatic closure machines. This is particularly true even of the closure clip described above; mechanical closure of the closure clip is not looked into at all in U.S. Pat. No. '553.
The problem forming the basis of the invention is therefore that of providing a chain of interconnected closure clips which is particularly suitable for mechanical closure of their closure clips while avoiding the disadvantages of the prior art.
The solution to this problem lies, according to the invention, in a chain of interconnected closure clips of the type mentioned above, which is characterized in that the closure clips comprise projections located in mutual alignment between the interlockable free ends on the outer contour and are connected only in the region of these projections, such that the projections form a through-web.
The projections on the closure clips are of particular significance in this chain of closure clips. As a coherent web, they assist supply of the chain to a closure machine. Moreover, the projection on a closure clip clearly simplifies the action of holding a closure clip firm against rotation during closure. Moreover, the closure clips in a chain may be easily released from the chain by simple separation of the web formed by the projections. If the chain of interconnected closure clips is produced economically by extrusion, it is sufficient for the individual closure clips in the chain to be pre-divided by a simple incision extending from the free ends of the closure clips to the projection thereon. Expensive punching, associated with a large quantity of waste material, is unnecessary. A chain of interconnected closure clips manufactured in this way is not only characterized in that its closure clips can be easily separated from the chain, but also in that the chain can be rolled up and may thus be stored in roll form. Owing to the through-web, it may also be particularly satisfactorily fed to a device for closing the closure clips.
In an advantageous embodiment of the chain, the projections on the individual closure clips are located centrally between the free ends thereof.
Moreover, an embodiment is preferred, which is distinguished by a cross-sectional profile in which the free ends are at a distance from each other corresponding to the maximum diameter of a bag neck to be closed with a closure clip. Such an embodiment offers the great advantage that the load in the area of the closure clip deformed during closure

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