US 2901904 A
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Description (OCR text may contain errors)
Sept. 1, WEY
JOINT PACKING STRIP Filed Dec. 5, 1955 IN VEN TOR. V0.97 WE Y BY I u I I Patented Sept. 1, 1959 JOlNT PACKING STRIP Jost Wey, Triesenberg, Liechtenstein, assignor, by mesne assignments, to Wey Aktiengesellschaft, Triesenberg, Liechtenstein, a joint-stock company of Liechtenstein Application December '5, 1955, Serial N 0. 551,121
Claims priority, application Switzerland December 8, 1954 2 Claims. (Cl. 72-106) This invention relates to joint packing, and more particularly to joint packing strips made of synthetic plastics or the like.
In the prior art, joint packing strips made of synthetic plastics exist which comprise a centrally located extensible portion joined on both sides by packing portions. The extensible portion includes a hose-like, flexible tube element extending in longitudinal direction and so disposed that the largest diameter of its section extends at right angles with respect to the plane of the strip.
These joint packing strips have proved unsatisfactory for the reason that when they were installed, the hoselike portion of the extensible central part frequently was incapable of absorbing the stresses encountered during and following such installation, with the result that the material gave way or even got torn.
It is an object of the present invention to eliminate this serious drawback, and to provide joint packing strips of synthetic plastics well adapted to take up the stresses arising during and following installation of the strips.
Other objects, and the manner in which the same are attained, will become apparent as this specification proceeds.
Pursuant to its principal objective, the invention contemplates joint packing strips of synthetic plastics including, in addition to the laterally extending packing portions, a centrally located extensible portion with a hoselike, flexible tube element provided with a tie or bridge portion which is disposed substantially in the plane of the packing portions. In accordance with the basic concept of the invention this bridge is instrumental in securing the hose-like portion in the proper position for installation purposes and, in consequence of such proper disposition, eliminating the occurrence of such deterioration as was experienced with the prior art packing strips.
In further elaboration of this basic concept, the invention contemplates providing this tie or bridge element in the form of a rip membrane designed to prevent cement, sand etc. from entering the hose-like portion during the installation of the joint packing strip, but to be torn on completion of such installation under the influence of the relative movements of the building or similar parts to be packed with respect to one another.
In the drawing attached to this specification and forming part thereof, several embodiments of the invention are illustrated diagrammatically by way of example.
In the drawing,
Fig. 1 shows, in vertical section, a joint packing strip according to the invention;
Fig. 2 illustrates, in vertical section, a modification, and
Figs. 3 and 4 show, in vertical section and in top view, respectively, another modification of the invention.
eferring now to the drawing wherein like elements are denoted by identical reference numerals, and first to Fig. 1, the joint packing strip of the invention is shown to include a central extensible part 1 which extends longitudinally as a strip and serves the purpose of taking up or responding to, the relative movements of the parts to be packed with respect to one another. In the center of this extensible portion 1 there is disposed a hose-like element 1 having a section the largest diameter of which extends at right angles with respect to the plane of the strip. This hose-like portion 1' which serves as an anchoring reinforcement, is provided, in line with the basic concept of the invention, with a bridge or tie element 4 disposed approximately in the plane of the extensible portion 1.
The extensible portion 1 is joined, on both sides, by flaps 2 forming the packing portions. For anchoring purposes each of the flaps 2 is provided with an anchoring reinforcement 3 which extends in parallel to the hoselike portion 1'. The anchoring reinforcements 3, viewed in section, are hollow and in a manner similar to that described with reference to the hose-like portion 1', are provided with tie or bridge elements 4'.
The construction described above, of the hose-like element 1' and the anchoring reinforcements 3, results in such reinforcement of the extensible part as a whole that the joint packing strip retains its proper position during installation whereby deformation and deterioration thereof are avoided.
The modification illustrated in Fig. 2 distinguishes from the embodiment of Fig. 1 merely by the addition, along the packing portions, of ribs 5 designed to impede the passage of liquid along the strip.
Another embodiment of the invention is shown in Figs. 3 and 4 where 11 generally indicates a joint packing strip made of a non-aging, acid resistant plastic such as polyvinylchloride, for example. In the center of this strip, a narrow portion 12 having inverted U-shape extends longitudinally across the whole of the strip, this portion being susceptible to being stretched to absorb the relative movements of the parts to be packed. The portion 12 projects vertically from the plane of the strip and encloses a hollow space 13 which in the plane of the strip, is closed by a rip membrane '14 which is much thinner than the strip 11. Ribs 15 are provided on the sides of the packing strip for reinforcing, anchoring and liquid passage preventing purposes.
This joint packing strip is particularly suitable for packing building joints exposed to material stresses.
When the building parts move with respect to one another, the rip membrane is placed under such severe tension that it is torn whereupon the U-shaped portion 12 stretches so the strip will absorb the forces which otherwise might damage it or tear it apart.
I wish it to be understood that I do not desire to be limited to the exact details of construction or operation shown and described as numerous modifications within the scope of the claims following below, may occur to a person skilled in the art which will neither depart from the spirit of the invention nor sacrifice any advantages thereof.
1. A joint packing strip comprising in combination, a centrally disposed resilient hose having different diameters in two planes disposed at right angles to one another, the larger diameter extending at right angles to the plane of the strip, an integral bridge member traversing the center of said hose and extending substantially in the plane of the strip, and strip portions extending laterally from said hose, tubular reinforcement and anchoring portions at the ends of said strip portions, integral bridge members disposed within the plane of said strip portions traversing the centers of said tubular portions, and packing portions laterally extending from said tubular portions.
2. A joint packing strip according to claim 1, including References Cited in the file of this patent UNITED STATES PATENTS Jacobsdn Dec. 24, 1935 4 Gardner J an. 7, 1941 Olmsted Sept. 9, 1941 FOREIGN PATENTS Norway Apr. 27, 1953 Great Britain Nov. 15, 1950 France Mar. 31, 1954