To suppress the swelling of a blanket and to prevent printing defectiveness, in order to solve the problem that the blanket absorbs a solvent in ink to be swollen when continuous printing is performed in an offset printing apparatus to generate the deterioration of a printing shape or transfer failure.
The offset printing apparatus performs the reception and transfer of ink and is equipped with the sheet or strip-like blanket used for the reception and transfer of ink, two shafts mutually opposed in the direction vertical to a printing direction to arrange the blanket on a printing surface plate and a pressure sweeping means for opposing the surface of the blanket to a plate surface or a work surface and pressing and sweeping the space between two shafts supporting the back surface of the blanket using a pressure fixture. The blanket is constituted of a substrate and a silicone rubber and an opening part is provided to the substrate.
KUSAKARI MASAYUKI
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