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Olivetti Lettera 32
The Olivetti Lettera 32 is a portable mechanical typewriter designed by Marcello Nizzoli for Olivetti in 1963 as the successor of the popular Olivetti Lettera 22. This typewriter was popular amongst journalists and students.
The typewriter is sized about 34x35x10 cm (with the carriage return lever adding about 1-2 more centimeters in height), making it portable at least for the time's standards, even though its 5.9 kg weight may limit portability somewhat.
==Mechanics==
The Lettera 32 is a downstrike typebars typewriter. The typebars strike a red/black inked ribbon, which is positioned between the typebar and the paper by a lever whenever a key is pressed; a small switch located near the upper right side of the keyboard can be used to control the strike position of the ribbon, in order to print with black, red, or no ink (for mimeograph stencils).
Ribbon movement, which also occurs at every keypress, automatically reverses direction when there is no ribbon left on the feed reel; two mechanical sensors, situated next to each wheel, move when the ribbon is put under tension (indicating ribbon end), attaching the appropriate wheel to the ribbon transport mechanism and detaching the other.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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