Roller offset printing apparatus

A roller offset printing apparatus including:

• a base (3);
• a linear stage (4) movable forwards and backwards on said base (1);
• a stage driving means (5) for driving said linear stage (4);
• a roller transfer drum (1) for transferring a pattern image to be transferred while being rotated;
• a roller transfer drum supporting means (16, 17) for rotatably supporting said roller transfer drum (1);
• a master plate (6) and a work plate (7) disposed at a predetermined interval on said linear stage, said master plate (6) having ink pits formed in a surface of said master plate (6) for reserving ink;
• and
• a roller transfer drum driving means (2) for driving said roller transfer drum (1) so that said roller transfer drum (1) rotates on the surface of said master plate (6) to transfer the ink in said ink pits of said master plate (6) onto the outer circumferential surface of said roller transfer drum (1) and said roller transfer drum (1) further rotates on a surface of said work plate (7) to thereby transfer the ink from the outer circumferential surface of said roller transfer drum (1) onto the surface of said work plate (7), wherein said roller offset printing apparatus further comprising:
• a synchronizing means (24) for driving said stage driving means (5) and said roller transfer drum driving means (2) under synchronization therebetween;
• a position detection means (14, 15) for detecting positions of said master and work plates (6, 7) respectively;
• and
• a correction means (8, 9, 10, 11, 12, 13) for correcting the respective positions of said master and work plates (6, 7) in accordance with quantities of displacement of said master and work plates (6, 7) from reference positions respectively when the detected positions of said master and work plates (6, 7) displace from said reference positions respectively.