| 摘要 |
An improved two-piece, gripping bar device for securing and selective roll-u p of flexible sheeting useful in screening, outdoor rigid structures, like greenhouses The identical rod-like pieces present a shape having an elongate cylindrical form upon conjoining w hich device grips a length of sheeting. The pieces permit firm mating by virtue of a mating ridg e on the contacting surface of each member which compliments an opposing mating recess on the op posite surface of the other member, so that each member presents a pair of parallel, linear ridges and linear recesses. Central of the arcuate or somewhat squared outer surface of the de vice is at least one elongate channel adapted to receive and recess the fastener heads and/or ret ain a second or third sheet of flexible material and thus be rolled-up with the inner sheeting to selected vertical heights.
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