Stock material or miscellaneous articles – Layer or component removable to expose adhesive
Reexamination Certificate
1999-08-10
2001-10-09
Thomas, Alexander S. (Department: 1772)
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
C428S099000, C428S120000, C428S900000, C024S442000
Reexamination Certificate
active
06299954
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an adhesive body, especially an adhesive or fastening body for producing a junction with a foam material molded body during the molding procedure of the foam material. Individual adhesive or fastening elements, arranged on a support strip, are covered with a surface-forming covering facing inward from the exterior to avoid penetration of foam material into the adhesive or fastening elements.
BACKGROUND OF THE INVENTION
An adhesive or fastening body disclosed in EP 0 612 485 B1 has a traditional adhesive fastening part for the foaming in the foam material molded body. The adhesive fastening part is provided with catch elements on its front surface. The reverse side of this adhesive fastening part has an anchoring part for the anchoring of the adhesive body in the surface of the foam molded material molded body to be foamed. The disclosed catch or adhesive elements are covered over their entire surface by a plastic sealing material during the foaming. Following completion of the molding procedure, the plastic sealing material can be torn off this surface to expose the catch elements. Seat coverings, padded parts or the like could then be mounted on the exposed catch elements and connected with the foam material molded body. The corresponding adhesive fastening parts, for example in the form of a loops-strip material or the like, are brought into engagement with the catch elements. Since the plastic sealing material surrounds the adhesive elements to be covered, form-locking in the shape of the catch elements, considerable force is required to separate the covering material from the adhesive elements, and the required mold-release forces can be greater than the connection forces between the specific adhesive bodies in the form of the adhesive fastening and the foam material. As a result, together with the covering sealing material one also tears off the strip-like adhesive body from the freshly foamed foam material seat body, which leaves this seat degraded beyond the possibility of use. Even if the sealing material is recyclable and can be used again for subsequent molding procedures, a corresponding quantity of material is to be handed for re-use of the sealing material, which makes the known molding procedure more costly.
In EP 0 168 240 A2, with the same sort of adhesive body and with comparable molding processes, the anchoring elements of an adhesive fastening part are covered on the frontal side only, using a thin foil, to avoid the penetration of the molding material. However, this process requires costly sealing measures in the border area of the foil, must eventually require a connection with the top of the adhesive fastener strip, increases the cost, especially in the frontal area of the strip-like adhesive fastener part, leads to sealing problems with the result that the foam material is even allowed the possibility of penetrating between the catch elements. The catch elements surrounded by foam material are then no longer available for the subsequent attachment of padding coverings and padding material, correspondingly prejudicing the possibilities of establishing secure arrangements. Also, the foil is easily torn off and can be torn off, which in practice leads to further problems.
SUMMARY OF THE INVENTION
Objects of the present invention are to provide an improved adhesive or fastening body that can save costs, can be tightly connectable with the foam material molded body, and can guarantee with greater assurance that during the foaming no foam material gets into the adhesive or catch elements.
These objects are basically obtained by the covering means itself being in the form of an adhesive means, supported and adhered upon the frontal side of the adhesive elements. It can be removed from these elements, thus exposing the adhesive elements. During the generation of foam, the adhesive elements are securely covered and the foam material cannot adhere to the adhesive elements during the foaming and cannot leave them unusable. Since the adhesive means is supported and adheres detachably to the adhesive elements, the strip-like or surface-like adhesive means is easy to separate from the adhesive elements. Undesired tearing of the adhesive body out of the foam material molded body does not occur. Besides, during generation of the foam, this adhesive covering means is connected securely with the adhesive elements, so that undesired tearing into that material cannot occur.
The coating, in the form of the adhesive material, can be a very thinly constructed coating, so that only a quite small amount of material need be required for the covering. This lowers the material cost, and it can be stored and travels well to market at low cost.
In one preferred embodiment of the adhesive body of the present invention, the adhesive means can be selected from among the melting adhesive materials, especially from among the so-called hot-melt-adhesives, or from among the dispersion adhesive materials, preferably on an aqueous phenol resin base, or from among the adhesives on a acrylate base. Such adhesives are characterized especially by very good adhesive strength on the plastic materials which are in question in this case. Besides, they are weather-resistant and water-resistant, and consequently are very appropriately in the position to effectively avoid undesired penetration of the foam material during the foam molding procedure. While in the technical information papers regarding these adhesive materials their strongly adhering property is emphasized above all, for an expert in the art of adhesive strip fasteners, it is surprising that these strip fasteners can be easily detached from the adhesive elements of such an adhesive fastening part, insofar as the adhesive elements preferably incorporate no hook-shaped configuration, but rather are truncated on the frontal side.
In another preferred embodiment of the adhesive body according to the present invention, on the side of the support strip facing the covering means is a loop material, preferably of cotton. The loop material guarantees an extensive junction with the foam material. Preferably, the loop material is arranged on a flat strip which can be provided as an integral part of the support strip or can be connected with the support strip. With the described arrangements, a secure junction of the adhesive body with the foam material can be produced during the generation of foam, such that neither with the removal of the adhesive material covering means nor with the subsequent tearing off of a fastener article on the seat covering is the foam-covered adhesive body part separated from the foam material.
With another especially preferred embodiment, the adhesive material means in an adhesive strip which can be rolled up and rolled out. On its exterior side turned away from the adhesive elements it is provided with a removable magnetic foil or a foil having a covering incorporating magnetizable particles, such as iron particles, or having a covering of silicon. Through the development or shaping of the adhesive material means as an adhesive strip which can be rolled out or rolled up, the adhesive means can be processed as a sort of foil. The production of the adhesive body requires no costly equipment, such as smelting devices and coating or application devices. Any extruding mechanism can be used for the application of the covering foam. More than that, simple feed devices and a pressure roller will suffice. Insofar as the adhesive body is provided with a removable magnetic foil or a covering layer with magnetizable particles, such strip-like adhesive body can be inserted in the mold with magnetic mounting, over so-called pipes or channels, and simply and securely adhered in the mold. During foaming in the mold, it can be held securely in its position in such a manner that during foaming in the mold it is not subjected to any dislocation or the like. Insofar as a silicon-coated covering layer is provided, the adhesive strip has an adhesive layer on both sides and consequently a
Firma Gottlieb Binder GmbH & Co.
Roylance Abrams Berdo & Goodman L.L.P.
Thomas Alexander S.
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