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Knight's Mechanical Encyclopedia (ed. Knight) 4 0 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
sufficient width for a pasting surface. One machine is shown operated by a hand-lever, the other by a treadle. The farther one, for square bags, has a bottom flap for the bottom piece, which folds over upon and is pasted to the side pieces. Wolle, October 26, 1852, and May 29, 1855, was perhaps the first to make bags by automatic machinery. The bag made is shown at a a′, Fig. 3506. a is the blank with a notch; the portion 1 is folded over the part 2, and then appears as represented at a′ut into oblong sections, notched, folded by a blade which drives the bottom edge between rollers, from whence the folded blank passes to the gummers and flap-folders. Blanks for paper bags. b c d shows a bag in successive stages as made in Wolle's machine of July 6, 1858. The piece is not removed to form the notch, but is folded in to make double the bottom of the bag. The Rice machine, April 28, 1857, was the first to bend a continuous web of paper over into a tubular shape and cut