Patent ID: 6203134
Filing Date: 2001-03-20
Classification: B41J,G06K

Abstract:
A dot recording apparatus for recording dots on a surface of a printing medium with a dot recording head, the dot recording apparatus comprising:a dot-forming element array arranged on the dot recording head to face the printing medium, the dot-forming element array comprising a plurality of dot-forming elements for forming a plurality of dots of an identical color at a pitch of k dots in a sub-scanning direction;a main scan driving unit that drives at least one of the dot recording head and the printing medium to carry out main scan;a head driving unit that drives at least part of the plurality of dot-forming elements to form dots in the course of the main scan;a sub-scan driving unit that drives at least one of the dot recording head and the printing medium every time when the main scan is completed, thereby carrying out sub-scan; anda control unit that controls the respective units according to a specific dot recording mode specifying a scheme of dot recording,wherein the pitch k of the dot-forming elements is expressed as a product m.multidot.n of two integers m and n (where m and n are integers of no less than 2); andwherein the sub-scan feed in the specific dot recording mode is executed by plural sub-scan feed sets each consisting of m sub-scan feeds; andwhereinwhen feed amounts of the m sub-scan feeds in each sub-scan feed set are expressed as Li dots (where i is an integer of 1 to m),the feed amounts Li (i=1 to (m-1)) at first through (m-1)-th sub-scan feeds are established so that a remainder obtained by dividing each feed amount Li by the pitch k is equal to the integer n; anda feed amount Lm in the m-th sub-scan is established so that a remainder obtained by dividing the feed amount Lm by the pitch k is an integer that is different from a value n.multidot.j that is j times the integer n (where j denotes an arbitrary integer).