Joints and connections – Rigid angle
Patent
1992-09-30
1995-01-10
Friedman, Carl D.
Joints and connections
Rigid angle
160395, 47 17, 24462, 52 63, 52222, B25G 300, A47H 1300
Patent
active
053801202
DESCRIPTION:
BRIEF SUMMARY
A greenhouse provided with a profiled frame for guiding a foil and also provided with a snap-on frame for the affixing thereof, as well as a profiled frame, a profiled snap-on frame, a clamping construction and a profiled beam.
The invention relates to a greenhouse provided with a profiled frame 3 for guiding a foil 2 and which said foil 2 can be affixed thereto with the aid of a snap-on frame 1.
The invention also relates to profiled frames, snap-on frames and clamping constructions for foil and to profiled beams for greenhouses for so far as these can be adapted for greenhouses.
For so far as the invention is concerned, the foil 2 is to be construed as meaning a material the dimensions of which in the length and breadth are large when compared to that of the thickness and that it exhibits some degree of flexibility. In the foregoing context one may think of a foil, film or a sheet-like material in general, whether or not it has a profiled cross-section, and which is to be retained in a fixed position when in use. Examples of such a material are plastic films, awnings, screens, covers and suchlike.
A greenhouse having the foregoingly quoted characteristics is known in which a lower side of the foil, forming the sidewall of the overcovering of a greenhouse, is affixed to a gutter construction by means of a profiled frame for foil guidance and by a snap-on frame.
It is noted that the construction of this prior art is meant to be the side or upper wall of a greenhouse in which the forms of the profiled frame and the snap-on frame are complicated and the foil is not easily removed therefrom. Another disadvantage is that the foil is difficult to stretch into place thus adding yet another disadvantage if the foil is to be used in a greenhouse as a sunblind or as insulation.
The object of the invention is now to provide a simple construction for affixing foil to a greenhouse and having the a profiled frame 3 applicable to a clamping construction for a greenhouse.
The profiled frame 3 is therefor preferably manufactured from metal, hard plastic or combination thereof.
The invention also relates to a profiled snap-on frame 1 applicable to a clamping construction for a greenhouse.
The profiled snap-on frame 1 is preferably manufactured from a spring material.
Suitable spring materials in this context are elastomer materials such as PVC (polyvinylchloride), PP (polypropylene) or thin aluminium strip.
As previously stated herein, the invention also relates to profiled beams 7a-7a applicable for use in a greenhouse and are thus provided with one or more profiled frames (3,3' . . . ) each of which co-operates with a profiled snap-on frame 1 and are thus produced as a clamping profile of "V" form for the foil 2 and in which at least one of the legs 3a of the profiled frames (3,3' . . . ) is provided with an extending edge 4.
If the profiled beams 7 are provided with two profiled frames (3,3') for example then this has the advantage that a number of foils 2 can be affixed thereto. In such a case, and through the use of foils having different properties such as those of opaqueness and heat insulation, these foils will only permit distribution and easy penetration of light of a certain wavelength to separate compartments of the greenhouse.
Preferably in the case of a profiled beam 7, easily manufactured by extrusion, only one of the legs 3a is provided with an extending edge 4.
In this case it is possible to provisionally apply tension to the foil 2 by pressing it along the extending edge 4 by means of the pointed extremity formed by the apex of the profiled snap-on frame 1. Following this, the foil 2 is finally tensioned by allowing the profiled snap-on frame 1 to fall behind the extending edge 4.
It appears that by using a sufficiently springy material for the profiled snap-on frame 1, a greenhouse-applicable advantage that the foil 2 is easy to pull into place and affix.
Furthermore the new construction has the advantage that the foil 2 is easy to remove. As stated previously herein the affixing, pulling into place and
REFERENCES:
patent: 3803671 (1974-04-01), Stuppy et al.
patent: 4790037 (1988-12-01), Phillips
patent: 4967424 (1990-11-01), Stegmeier
patent: 5009540 (1991-04-01), Nolan
patent: 5046546 (1991-09-01), Benedyk et al.
patent: 5197238 (1993-03-01), Peleg
Canfield Robert J.
Friedman Carl D.
Rolloos Sorensen B.V.
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