Serial printer with a single type wheel

Details Serial printer with a single type wheel Serial printer with a single type wheel

1988-02-26

1989-12-05

Wiecking, David A.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by pivoting of type-head-carrier and type-head...

400185, 400634, 101 9324, B41J 142

Patent

active

048849065

ABSTRACT:
In a serial printer having a single type wheel, the type wheel is rotatably supported on a rocking frame, which is rockable relatively to a fixed frame, so as to be fixed with respect to the direction of the axis of rotation, and is rotated by means of a single drive motor. A drive transmission mechanism between the motor and the type wheel includes a main shaft rotatably supported by the rocking frame and a main cam rotatable in one with the main shaft. Each revolution of the main shaft and the main cam is divided into at least three rotational angular ranges, which are allotted individually for operation processes of type selection, printing, and sheet feed. All these processes are executed with use of the single drive motor as a drive source. A sheet holding mechanism continuously maintains a paper hold state until a specific character, such as an end mark, is printed after the start of a printing cycle. A printing sheet is held and released by means of the aforesaid drive motor as the drive source. The sheet feed pitch is adjusted in accordance with another specific character, such as a comma, and a sheet feed mechanism for the adjustment is driven by means of power transmitted through the main cam.

REFERENCES:
patent: 1594573 (1926-08-01), Stallman
patent: 2817428 (1957-12-01), Appelberg
patent: 4095686 (1978-06-01), Okabe
patent: 4406551 (1983-09-01), Maezawa et al.
patent: 4410289 (1983-10-01), Koike et al.
patent: 4424743 (1984-01-01), Okubo et al.

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