Stock material or miscellaneous articles – Layer or component removable to expose adhesive
Reexamination Certificate
1998-08-12
2001-02-13
Ahmad, Nasser (Department: 1772)
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
C248S205300, C248S467000, C248S683000, C428S041800, C428S042100, C428S068000, C428S192000, C428S194000
Reexamination Certificate
active
06187404
ABSTRACT:
The invention relates to a holding device which, by means of adhesive strips which release on pulling, is reversibly bondable and reusable, possibly with a new such adhesive strip.
BACKGROUND OF THE INVENTION
Adhesive strips which release on pulling are commercialized as “tesa Power-Strips” by Beiersdorf AG and are also described by numerous patents, such as DE 33 31 016 B1, DE 42 22 849 B1, DE 43 39 604 B1, DE 44 28 587 B1 and DE 44 31 914 B1. In addition, U.S. Pat. No. 4,024,312, WO92/11332, WO92/11333 and W095/06691 describe adhesive strips of this kind. Such adhesive strips are pulled out of the bond in the direction of the bond joint, in a way comparable with the opening of a preserving jar.
For instance, U.S. Pat. No. 4,024,312 describes a pressure-sensitive adhesive tape having extensible and elastic backing composed of a block copolymer, in particular for applications in the medical area, where painless pulling off the skin is desirable.
Furthermore, DE 33 31 016 A1 describes an adhesive film for re-releasable adhesive bonds which allows an adhesive bond established therewith to be released by pulling on the adhesive film in the direction of the bonding plane. With such adhesive films, high adhesive forces and shear strengths can be achieved and adhesive bonds can be released again without further aids, in a way comparable to the opening of a preserving jar, similar to the way in which there the rubber seal is pulled by the grip out of the seal joint.
Furthermore, DE 37 14 453 C1 describes a practice explosive charge which can be detached again from practice objects without destroying it and is reversibly fastened by such an adhesive film. WO 92/11333 also describes, inter alia, adhesive films for corresponding applications, the adhesive films used having a low elasticity with at the same time high extension.
DE 42 22 849 C1 likewise describes a strip of an adhesive film of this kind with a specially shaped grip tab.
In addition, hooks or similar fastening systems for use together with such adhesive strips are commercially available as “tesa Power-Strips mit Haken” [with hooks] or else “tesa Power-Strips Systemhaken” [system hooks] from Beiersdorf AG.
Finally, DE 42 33 872 C2, DE 195 11 288 B1 and WO 94/21157 describe re-releasable self-adhesive hooks which are likewise provided with such adhesive films and are also re-releasable.
However, the adhesive systems and hooks represented in the above-mentioned publications also have a number of disadvantages:
Problems with hooks and the like of the prior art are, on the one hand, the visual concealment of the grip tab, which for the subsequent pulling must protrude beyond the device, and, on the other hand, the protection of this grip tab against manipulation or damage, including in particular damage by UV light.
Also, a multi-part design, as disclosed by the prior art, is disadvantageous whenever one part is lost or falls down, for instance during assembly. This risk increases the smaller the hooks are in their dimensions.
The object of the invention was to remedy this situation and, in particular, to provide a hook or the like which does not have the disadvantages of the prior art, or at least not to the same extent.
SUMMARY OF THE INVENTION
The invention relates accordingly to a holding device, especially a hook, as characterized in detail in the claims. The embodiments according to the subclaims are preferred.
The holding device according to the invention comprises a one-part hook body and a one-part baseplate, which are undetachably bonded to each other, the baseplate for the bond with an adhesive strip which releases on pulling being designed such that a grip tab of the adhesive strip protrudes beyond the baseplate, and the hook body being designed such that it covers over the baseplate and also the grip tab protruding beyond the latter.
On the baseplate there are integrally formed at least four extensions, which respectively lie opposite one another in pairs and which protrude laterally beyond the baseplate.
In the hook body there are formed guides in which the extensions of the baseplate are guided such that the hook body is released by a movement parallel to the baseplate from the basic position, in which the hook body is anchored on the baseplate and thereby covers over the baseplate and the grip tab of the adhesive strip, and during this release lifts itself off the underlying surface, at least on one side, so that access to the grip tab is possible.
In a preferred embodiment, the extensions of the baseplate are arranged at the same height.
In a further preferred embodiment, the hook body is always aligned parallel to the baseplate during the movement parallel to the baseplate.
The hook body and/or the baseplate are preferably produced from metal or plastic, most preferably polyethylene terephthalate, polystyrene or ABS.
The hook body advantageously has a border which laterally encloses and visually conceals the baseplate and the adhesive strip to be adhesively attached behind the latter.
Finally, the holding device has an adhesive strip adhesively attached behind the baseplate.
With the aid of the holding device according to the invention, the disadvantages known from the prior art are avoided in an outstanding way.
No part of the holding device can be lost.
The hook body may also be used for grasping during the stripping operation.
Furthermore, a material mix is possible in the case of the hook body and baseplate, i.e. an optimum selection of the materials according to the application is possible.
The basic principle of the releasing operation of this holding device is that the hook body which is seated on the baseplate, and thereby covers the latter completely, is displaced in order in this way to give free access to the adhesive strip.
For this purpose, the hook body is displaced by a few centimetres in a movement parallel to the baseplate. On account of the extensions provided on the baseplate, which slide in correspondingly shaped guides of the hook body, the hook body is guided along during the movement operation by the underlying surface, at least on one side, so that one of the grip tabs of the adhesive strip is freely accessible. The guides in the hook body are also designed such that no tilting of the upper edge with respect to the underlying surface occurs.
In the preferred embodiment of the baseplate with extensions which are all arranged at the same height, the above problem is precluded from the outset by the design.
Particularly advantageous embodiments of the holding device according to the invention are presented in more detail below with reference to several figures, without wishing to restrict the invention unnecessarily by doing so.
REFERENCES:
patent: 5921514 (1999-07-01), Schumann
patent: 5928747 (1999-07-01), Luhmann
patent: 5984247 (1999-11-01), Luhmann
Ahmad Nasser
Beiersdorf AG
Norris McLaughlin & Marcus P.A.
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