Dot printer operable in high resolution and ordinary printing mo

Details Dot printer operable in high resolution and ordinary printing mo Dot printer operable in high resolution and ordinary printing mo

1983-10-07

1986-12-23

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9304, B41J 302, B41J 308

Patent

active

046309462

ABSTRACT:
Disclosed is a printing method by using a printer of the cross hammer type, which comprises the steps of driving, in the backward travelling of a printing head, a rotary drum which is provided with a plurality of axially parallelly extending on its outer circumferential periphery, to rotate in the direction opposite to the rotational direction of the same in the forward travelling of the printing head, and driving the printing hammer such that dots are formed, in the backward travelling of the printing hammer, between dot rows formed in the forward travelling of the printing hammer so that printing is performed over one line through one reciprocating traveling of the printing head. Preferably, the printing mode is selectable between a high resolution one and an ordinary one such that in the high resolution mode, the printing head is driven in the backward travelling of the printing hammer, dots are formed between dot rows formed in the forward travelling of the printing hammer so that printing is performed over one line through one reciprocating traveling of the printing head, and in the ordinary mode, the printing hammer is driven to perform printing over one line and a new line making through each of the forward and backward travelling of the printing head.

REFERENCES:
patent: 3764994 (1973-10-01), Brooks et al.
patent: 4010835 (1977-03-01), Martin et al.
patent: 4242003 (1980-12-01), Ragen
patent: 4465386 (1984-08-01), Shimada et al.

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