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| OF THE ILLUSTRATED EMBODIMENTS In FIG. 1 a prior art combination of a gutter 10, having a upwardly ... |
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| Modular roofing system and assembly |
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| Dual amplifier tap bracket or the like |
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| Leaf trap assembly |
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| Fixing device for securing conduits to support structures |
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| Air vent deflector insert |
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Fastener for plastic film sheeting
| Details |
Inventors: Hogshead, III, Rodney C.; Van Duyne, Jr., Giles;
Assignee:
Primary Examiner: Britts; Ramon S.
Assistant Examiner: Purol; David M.
Attorney, Agent or Firm: Wiggins; Macdonald J.
A system for securing the edges of plastic sheeting or the like is formed from metallic extrusions using three elements: a base element; an intermediate element; and a cap element. The base element is mounted to the surface to which the sheeting is to be attached and the cap element is placed over the sheeting and interlocks with the base element. If multiple sheets of plastic film are to be secured, intermediate elements may be used with the cap element installed to secure the top sheet. Tension on the sheetings serves to lock the elements in place. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The basic elements of my plastic film holding system of the invention are shown in FIGS.
1 through 3.
FIG.
1 is the base element 10 which includes a base portion 12 having a locking spline 14 projecting upward therefrom.
A plurality of holes 13 may be drilled in base portion 12 for securing to a surface.
A T portion 15 is attached vertically along one edge of the base portion 12.
T portion 15 includes a planar T-crossbar portion 16 having an upwardly oriented bead 17 along one edge thereof and a downwardly oriented bead 18 along the opposite edge.
It may be noted that the outboard edge of T-crossbar 16 is longer than the inboard edge thereof, as will be discussed hereinbelow.
Turning to FIG.
3, the cap element 30 is shown having a planar surface 36, a long lip portion 31 defining a channel 35, and a short lip portion 33 defining a channel 37.
A downwardly extending bead 34 is disposed along the inner edge of lip 31 and a symmetrical bead 32 is disposed along the edge of lip 33.
A space 39 is defined by beads 32 and 34.
FIG.
2 is a perspective view of the intermediate element of my invention.
As will be recognized, intermediate section 20 is in effect the cap element 30 having the T portion of base element 10 attached to the planar surface thereof.
Consequently, lip 21 defines channel 25, lip 23 defines channel 27, and beads 22 and 24 define opening 29.
The vertical member of the T-shaped portion 26 is at right angles to the plane of the cap portion of intermediate section 20.
The T-crossbar surface 28 is equivalent to surface 16 of the base section.
Elements 10, 20, and 30 are preferably extruded from aluminum for lightness, low cost, and ease of handling.
However, it will be apparent that other materials having the necessary rigidity are suitable.
Referring to FIGS.
4 through 6, the installation of a film sheet will be described and certain features of my invention explained.
In FIG.
4, the edge of a plastic sheet 11 to be secured is disposed over the T-crossbar portion 16 of a base element 10, shown in cross section
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