Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Strip or slat structure
Patent
1996-06-27
1997-11-18
Purol, David M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Strip or slat structure
160232, E06B 312
Patent
active
056877854
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a Venetian blind slat which is made as a hollow section slat and which has grooves to hold chain links transversely to its longitudinal extension, in which a joining element for joining two parts of the hollow section slat can be inserted into a hollow chamber of the latter.
BACKGROUND OF THE INVENTION
WO 93/21417 and EP-A-189 091 disclose Venetian blind systems in which in the Venetian blind slats transversely to the longitudinal extension of the slats there are grooves or recesses in order to form free spaces for adjustable or support chain links. These grooves are produced for example by routing from the profiled Venetian blind slat. In this structure relatively few parts are necessary, but production of these grooves or recesses is time-consuming and expensive. Another disadvantage is that a conflict arises in that the cross section of the Venetian blind slat which remains in the area of the groove or recesses should not be too weak so that the Venetian blind retains enough strength. i.e., that the wall thicknesses of the Venetian blind slat made as a hollow section must be relatively great; however, this leads to relatively high weight of the Venetian blind slat and increases its costs; however this does not increase the stiffness of the section to the desired degree.
Therefore the object of the invention is to make available a Venetian blind which can be cost favorably produced, but which has high enough strength without being unnecessarily heavy.
This object is achieved in a generic Venetian blind by spacing the two parts of the hollow profiled slat away from one another and bordering the groove with the joining element.
EP-A-189 091 does disclose joining parts of the Venetian blind slats via peg parts which are inserted into the hollow section chamber. These peg parts however are not used where support or adjustable chain links are to be accommodated in the Venetian blind slat.
SUMMARY OF THE INVENTION
These problems are easily solved by the joining element according to the invention, since in the area of the support or adjustable chain links the Venetian blind slat itself is not weakened, but is replaced by a stable joining element.
In the production of the Venetian blind the advantage also arises that the individual parts, i.e., the adjustable chain links, the joining elements, the support and adjustable chain links can be cut off by straight cuts and thus in a package, by which not only the machinery for producing the Venetian blind can be technically less complex and thus cheaper, but working times can also be shortened. The Venetian blind slats and joining elements after cutting off straight need only be pushed into one another and joined securely to one another for example by notch pressing or adhesives.
Directly at the joining site, where for example a tension or adjustable chain link is to be accommodated, the Venetian blind slat is made partially as a solid slat. The joining element is made as a solid slat and not as a hollow profiled slat, and it is thus somewhat heavier. But for this reason the Venetian blind slat in this area in which it is weakened in the known embodiments, has especially high strength. Since, conventional Venetian blinds have a greater width and the remainder of the Venetian blind slat can be made especially light and thin-walled, by means of the invention significant weight can be saved without the Venetian blind slat losing strength.
If the joining element essentially completely fills the hollow chamber in the hollow profiled slat, this limits the wall thickness of the tension or adjustable chain links to at most the wall thickness of the Venetian blind slats. Since at low wall thicknesses of the Venetian blind slats the support or adjustable chain links can only be made weak, in some cases strength problems can arise in support and adjustable chain links.
One preferred development of the invention is therefore characterized by the fact that the cross section of the joining element is narrower than the cross sec
REFERENCES:
patent: 3302692 (1967-02-01), Grau
patent: 4625868 (1986-12-01), Bischof
patent: 5435371 (1995-07-01), Cheng
patent: 5566737 (1996-10-01), Erber
Erber Andreas
Erber Gunther
Erber Andreas
Purol David M.
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