PURPOSE: To provide a serial impact printer, with which clear printing quality is obtained over the kind of printing paper ranging from one tissue to multiple sheet set and over the printing speed ranging from slow to high speed and, at the same time, stable quality can be kept or neither paper breakage nor unnecessary shadow can develop.
CONSTITUTION: Four platen parts 8a-8d having shapes different from one another are provided so as to be able to selectively arrange at the position opposing to a printing head 2 under the condition that printing medium P is pinched between either one of the platen parts and the printing head so as to perform printing in co-operation with the printing head 2 by selecting one platen part in response to the thickness of the printing medium P or to the printing speed.
NINOMIYA AKIRA
YAMADA YOSHIYUKI
