US 5,681,121 A · Printer in which the amount of carriage travel can be changed for different printing types

Abstract

There is provided a printer comprises a first type group having a first font; a second type group having a second font; a first read only memory in which a space traveling amount corresponding to each type of the first type group has been stored; a second read only memory in which a space traveling amount corresponding to each type of the second type group has been stored; and a microprocessor which selects the 1st read only memory when the 1st type group is used, thereby allowing the propotional spacing operation corresponding to each type of the 1st type group to be performed, and which selects the 2nd read only memory when the 2nd type group is used, thereby allowing the proportional spacing operation corresponding to each type of the 2nd type group to be performed. Since the invention can be constituted by a simple hardware, by merely adding this hardware to a conventional printer such as an electronic typewriter, the fine proportional spacing can be executed for each type of various kinds of fonts.

Claims12

Dependent claims

A printing apparatus having a movable carriage on which a plurality of font sets can be mounted, comprising:

memory means, for storing a reference movement amount of the carriage for each font, the reference movement amount corresponding to each font to be printed being read out from said memory means when each font is printed, and for outputting a digital signal representing the reference movement amount;
designation means having a plurality of operation positions corresponding to different spacing modes of the carriage respectively, for designating the different spacing modes by generating different correction amounts of the reference movement amount of each font stored in said memory means, in response to assuming the plurality of operation positions, respectively, and for outputting a digital signal having a logical value of 0 or 1, representing the different correction amounts;
an adder, connected to said memory means and said designation means, for adding the digital signal output by said memory means and the digital signal output by said designation means to generate a movement amount associated with the spacing mode corresponding to the operational position of said designation means;
and
control means for controlling the movement of the carriage by the movement amount added by said addition means.

2 more elements

Dependencies are inferred from the claim text.

Printer in which the amount of carriage travel can be changed for different printing types

Life of this patent

Printer in which the amount of carriage travel can be changed for different printing types

Life of this patent

Abstract

Claims12