Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . et of folding-rollers, and finally deposited in a trough. Birchalls English patent of 1847 shows mechan-ism for folding the sheet by a reciprocating knifeinto folding-rollers. Black (English), 1850, had registering-pins, whichwere vibrated out of the sheet. See also Snuths patent, November 27, 1849;Snow, October 15, 1850 ; English patent No. 13,315,for 1850 ; No
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . et of folding-rollers, and finally deposited in a trough. Birchalls English patent of 1847 shows mechan-ism for folding the sheet by a reciprocating knifeinto folding-rollers. Black (English), 1850, had registering-pins, whichwere vibrated out of the sheet. See also Snuths patent, November 27, 1849;Snow, October 15, 1850 ; English patent No. 13,315,for 1850 ; Norths parent, October 15, 1856 ; Cros-by, December 23, 1856 ; Smith, May 19, 1857 ;North, August 10, 1858 ; Endriss, March 8, , 1856, had registering-pins to fit theperforations made by the printing-press. (SeePoint.) Iliese pins or points are adjustable,and, as the folding-blade descends, recede by a cammovement. Chandierss machine (Fig. 3531) is adapted to foldlarge double-sheet papers. The sheet to be foldedis spread upon the folding-table, and the registersecured by points. The folding-blade overhead fallson the middle of the sheet and carries it down,douliled, through a slot in the table. The blade is Fig. 353L. Fohlnii! then withdrawn, and a second fold riven the doubledsheet at liuht angles to the first, by a blade belnwthe bed. The inside .sheet is autoniaticnlly placedin its position, both receive their final fold, and aredeposited in a trough under the bed of the ma-chine. In a maclune exhibited at the London Exposition of 1862. the sheets are put singly by a boy underthe points of the machine in the same manner as inthe printing-machine. A knife moving up and downtakes hold of the slieet lenirthwise in the center,draws it through a .slit in the table, and the firstfold is made. The knife returns instantly, and thesheet is taken by a second vertical knife, folding it PAPER-GAGE. 1623 PAPER-MAKING MACHINE. at right aiigles to the first fold. Before
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