Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Patent
1977-07-15
1979-03-20
Dorner, Kenneth J.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
With tighteners
160392, 160395, A44B 2100
Patent
active
041446224
ABSTRACT:
The device is used for fastening sheet material, such as plastic sheeting, to a framework, such as a greenhouse framework, to enclose the framework with the plastic sheeting. The device comprises an elongated channel having, in cross-section, the shape of a dovetail groove, and a zig-zag spring member which is operatively inserted into the channel, after the sheeting has been trained over and into the channel, to serve as a retaining member positively connecting the sheet material to the channels which, in turn, are secured to the framework by bolting or the like. The flanges of the channel are curved at their connection to the base thereof, and the outer edges of the channel are re-entrantly curved to form "pipes" extending longitudinally thereof. The curved edges and the inner curves of the flanges provide for smooth training of the sheeting into the channel and over the edges of the flanges. The zig-zag spring has the appearance, in plan, of a series of "open base" trapezoids with adjacent trapezoids facing in opposite directions and each having a leg in common with the other. The sheet material can be easily removed from the channel by simply pulling on an end of the zig-zag spring therein, to decrease its width, and extracting the spring from the channel. Different thicknesses of sheeting can readily be accommodated.
REFERENCES:
patent: 783759 (1905-02-01), Record
patent: 975335 (1910-11-01), Dial
patent: 1013531 (1912-01-01), Carmany
patent: 3762108 (1973-10-01), Pierson
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