JPS6464882A - Method and apparatus for controlling movement of carrier equipped with comb-shaped type plate in printer - Google Patents

Abstract

PURPOSE:To print a vertical rule without deviation, by always moving a carrier in one direction when the vertical rule is printed. CONSTITUTION:When the type and vertical rule of the comb plate 4 of a comb- shaped type plate 3 are printed on printing paper 2, the quantity Y of a type 1 up to the position of the next type to be printed is subtracted from the quantity X of a type (a) from the HP of the carrier 10 in the second memory means 19 to the present printing position to add the quantity P of a printing pitch. As a result, since the obtained value becomes negative, the vertical rule 1 of the first time is printed by moving the carrier 10 by an M-pulse in the HP direction. Next, the line of paper 2 is changed to print a type (b) and, thereafter, the quantity Y of the type (b) up to the position of the type 1 is subtracted from the quantity X thereof at the present printing position to add the quantity P of the printing pitch. As a result, since the obtained value becomes positive, the carrier is necessarily moved by the M-pulse in the direction reverse to the HP and subsequently moved by the specific excessive feed quantity B pulse in the HP direction to print the type 1 on the line of the previously printed vertical rule.