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 . ne wasa tiat-bed press, and was long a favorite; it was usedby Gales and Seaton in Washington in their printingfor the United States government. The platen wasmoved to the form, and not the form to the ]ilaten,as with the Adams, which is shown in Fig. 3952. The .\ilams power-press was introduced in 1830,but has since been much improved, ami still standsvery high
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 . ne wasa tiat-bed press, and was long a favorite; it was usedby Gales and Seaton in Washington in their printingfor the United States government. The platen wasmoved to the form, and not the form to the ]ilaten,as with the Adams, which is shown in Fig. 3952. The .\ilams power-press was introduced in 1830,but has since been much improved, ami still standsvery high with book-printers. Its movement is based on that of the iLond-jiress, and gives a perfectly flat impression hy lifting the bed of the pressand its form against a stationary platen. Sheets arefed to the press by hand, and taken away by tapesand a fly. One thousand impressions per hour is afail speed for a large Aihims press on book forms. Single-cylinder presses have a flat bed which isgeared to reciprocate at an even speed with a re-volving cylinder. Sheets of paper are fed to thecylinder, which carries a prepared tymjian. Theinked form runs along with the sheet until it isprinted, when the form is retracted and inked PRINTING PRESS. 1799 PRINTING-PRESS. A segment of the cylinder is removed to allow of abackward movement of the bed, aiid in some ma-chines the C3linder stops after a partial Cylindku-press. Fig. 3953 is a single-cylinder of the Camp-bi-U pattern. It is controlled in its operation en-tirely l)y the sheet, so that it is impossible to printthe sheet out of register. When a sheet is fed badlyit is tlirown out unsoiled, and it will continue to bethrown out so until it is properly fed. If pointingis necessary in fine register, tlie points are operatedby electricity, in which case it is impossible to printout of register on it. Tliis result is obtained throughan tliat operates a bolt attachedto a diaphragm, which locks
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
