Special receptacle or package – Retainer enters opening in article
Patent
1997-10-07
1999-07-27
Gehman, Byron P.
Special receptacle or package
Retainer enters opening in article
206499, 206526, 294158, B65D 7300, B65D 8562
Patent
active
059274972
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a pack of large surface washers. Such a pack is known from WO 84/03874, to which more detailed reference will be made hereinafter.
Large-surface washers must be kept in a certain order for storage and transportation, and it is desired in particular that this order be maintained until the washers are loaded into the magazine of a placing (washer applying) machine. Stacking problems occur in particular with spacing elements, with reinforcing ribs or with spikes projecting from the underside.
If such stacks of large-surface washers are packed in a cardboard box, for example, advantages are certainly obtained for storage and transportation, but disadvantages result with respect to the necessary loading into a magazine. In practice, loading is limited to what can be grasped by hand, meaning individual washers or a small stack thereof. Even if such stacks of large-surface washers are bound together with adhesive tape, for example, to form a pack, the adhesive tape must be removed beforehand in order that the washers can be loaded into the magazine.
From U.S. Pat. No. 5,163,580 there is known a pack for a washer stack held together by a plastic tape passed through a through-hole provided in all washers. At the ends of the stack the plastic tape is doubled back and heat-sealed to itself, thus forming a kind of knot that is larger than the through-holes in the washers, in order thereby to hold these together. After the washers have been loaded into the magazine, the plastic tape is pulled vigorously enough to deform one heat-sealed end of the tape sufficiently to slip through the through-holes in the washers.
However, the size of the end of the tape must be sufficiently matched to the size of the through-holes in the washers to ensure that the stack is held together, while still allowing the tape to be pulled out of the stack.
To remove the hardware from the stack, the plastic rods are pulled out or cut off in successive steps. In the process, however, it is sometimes necessary to remove fragments of plastic rods remaining in the through-holes, which is time-consuming.
SUMMARY OF THE INVENTION
The object of the invention is to improve a pack of stacked washers such that a stack of washers can be packed as simply and rapidly as possible for storage and transportation. At the same time the stacked washers are mutually locked against turning, and the pack can be rapidly removed again during loading of the stack into the magazine of a placing machine.
In a pack of substantially parallel-stacked transportable washers, at least two through-holes are provided in each washer, the two legs of a substantially U-shaped metal or plastic wire being positioned in the two through-holes of the stack of washers. The free ends of the legs projecting beyond the stack are bent over to positions oriented at approximately right angles to the respective legs. By appropriate force on the crosspiece, or on an extension, the wire is pulled back out of the stack of washers, the free ends being restraightened in the process.
By virtue of the features according to the invention, an appropriate stack of large-surface washers is firmly held together, at the same time ensuring that the stacked washers are mutually locked against turning. Such a washer stack can be loaded in a simple manner as a self-contained pack into the magazine of a placing machine. No problems of any kind occur during loading. As soon as the pack containing the stack of large-surface washers has been loaded into the magazine the U-shaped metal or plastic wire can be pulled upward by a very simple tool such as a screwdriver or pliers, so that the ends of its legs, bent over at acute to right angles, are straightened out, and the entire wire can be pulled out of the through-holes of the washers.
Thus cardboard boxes, adhesive tapes, etc. are not required for packing individual stacks of washers, but merely a U-shaped metal or plastic wire, which can be easily disposed of, is needed.
Of course, it must be ensured that the
REFERENCES:
patent: 1560938 (1925-11-01), Lund
patent: 1562196 (1925-11-01), Abrams
patent: 3180489 (1965-04-01), McGinn
patent: 4514126 (1985-04-01), Knowles
patent: 5139144 (1992-08-01), Robert, Jr.
patent: 5163580 (1992-11-01), Beach et al.
Baumgartner Stefan
Gasser Daniel
Maurer Jurg
Seifert Walter
Gehman Byron P.
SFS Industrie Holding AG
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