Serial printer
AssigneeAlps Electric Co., Ltd.
InventorsIkutaro Inoue, Kousaki Yanata
Life of this patent
Estimating the term…
Abstract
A small and light-weight serial printer adapted to portable electric-powered typewriters and output devices of personal computers. The serial printer of the present invention requires a reduced number of drive sources and is simply constructed. The serial printer further possesses a small and light-weight carriage which does not mount drive sources such as motors or electromagnets and which does not mount a hammering mechanism, either.
Claims6
In a serial printer having a plurality of types formed on the periphery of a cylindrical type carrier, said type carrier being held by carriage adapted to be moved across the paper, and means for pressing a desired type against said paper to effect printing, the improvement comprising:
- (a) a type shaft splined to said type carrier and lying parallel to the direction of movement of said carriage;
- (b) said means for pressing including a hammer lying opposite said type carrier via said paper and having a striking surface of an area sufficient for striking only one of said types, said hammer being adapted to be moved through a predetermined range in a direction parallel with the movement of said carriage;
- (c) means including a hammer drive member lying along said range of movement of said hammer for driving said hammer in the direction of said type carrier;
- (d) means including a first pulse motor for moving said carriage;
- (e) means including a second pulse motor for moving said hammer;
- (f) means including a d-c motor rotating said type shaft and said hammer drive member, alternatively;
- (g) means including a first clutch for controlling the transmission of rotation between said type shaft and said d-c motor;
- (h) means including a second clutch for controlling the transmission of rotation between said hammer drive member and said d-c motor;
- (i) means including a first electromagnet for selecting the stop position of said type carrier;
- (j) a cam adapted to be controlled by operation of said first electromagnet;
- and
- (k) means including a second electromagnet for controlling said cam after the stop position of said hammer has been selected.
Dependencies are inferred from the claim text.