Title: Serial printing device

Abstract: A serial printing device comprises a type drum rotatably mounted on a carriage which can move parallely to a platen. On the periphery of the type drum are mounted a plurality of character-bearing elements urged against the drum by biasing means. A stepping motor rotates the drum for positioning a selected character-bearing element in front of the platen. A hammer is actuatable for pushing the selected character-bearing element radially outwardly relative to the drum against the action of the biasing means, and the drum is moved towards the platen simultaneously to the actuation of the hammer.

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Inventors: Becchi, Raffaele (Ivrea, IT)
Bisone, Dario (Montalto Dora, IT)

Application Number: 494422
Filing Date: 1974-08-05
Publication_date: 1976-03-02
Assignee: Ing. C. Olivetti & C., S.p.A. (Ivrea, IT)
Primary Class(es): 400/144.1 400/157.2, 400/162.3, 400/163, 400/163.2, 400/167, 400/168, 400/175, 400/212, 400/216.1, 400/248
Other Classes:
US Patent Ref:

723855	Mar, 1903	Frantz	197/53.
2127251	Aug, 1938	Fischer	197/12.
2248097	Jul, 1941	Larson	197/53.
3406807	Oct, 1968	Sasaki	197/53.
3717234	Feb, 1973	Koller	197/53.

Other Refs:
Primary Examiner: Skogquist, Harland S.
Assistant Examiner:
Attorney: Schaefer; I. J.