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Robert J. Lang has applied rigid origami to the problem of folding a space telescope. [7] Although paper shopping bags are commonly folded flat and then unfolded open, the standard folding pattern for doing so is not rigid; the sides of the bag bend slightly when it is folded and unfolded. The tension in the paper from this bending causes it to ...
In 1878, the president of the Union Paper Bag Co. of Philadelphia called on House, as he had heard that House had developed a machine that was able to make satchel-bottom paper bags. House came up with a folding attachment for their old machines, and although this was satisfactory to a degree, the machines were still old, and were not properly ...
There are two basic designs of bags: open-mouth bags and valve bags. An open-mouth bag is a tube of paper plies with the bottom end sealed. The bag is filled through the open mouth and then closed by stitching, adhesive, or tape. Valve sacks have both ends closed and are filled through a valve. A typical example of a valve bag is the cement sack.
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Wooden pallet construction specifications can depend on the pallet's intended use: general, FDA, storage, chemical, export; the expected load weight; type of wood desired: recycled, hard, soft, kiln dried or combo (new and recycled); and even the type of fasteners desired to hold the pallet together: staples or nails.
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