Abstract: A valve assembly for a satchel end tubular bag comprising four members. Two members form an upper sub-assembly and two other members for a lower sub-assembly. The valve assembly is adhesively secured at a corner tuck of the satchel end within the paper plies of the bag. The upper sub-assembly is wrapped within the lower sub-assembly and forms a passageway for a product injection nozzle to be inserted therethrough for introducing product into the bag. The members of the sub-assemblies are laterally offset and each sub-assembly has said members both laterally and longitudinally offset, or stepped, to achieve strength and a sift-proof construction. Extensions of one of the members of each sub-assembly extend bag-inwardly and comprise a thin pliable material, whereby to provide improved self-closure as the product fills the bag. Both improved filling and sealing are achieved.

Abstract: A plurality of slats are positioned atop the side walls of the cargo space of a truck and extend therebetween in parallel relation to the front and back walls and support a tarpaulin. The tarpaulin is extended over the top of the cargo space and folded, selectively, by controlling the direction of rotation of a motor which rotates cables mounted on the top of the side walls and affixed to the back slat.