US Patent 7810428 Method of manufacturing pre-inked stamps and stamp member

At stamp manufacturing blank printing plate (3) and inked porous base plate are brought to contact for the moment of creation of printing pattern. Blank stamping member for pre-inked stamp consisting from blank printing plate (3), made from porous thermo-plastic material, printing plate's case (1) and porous base plate (2), filled by ink. Printing plate is attached to the case, but separated from the inked base plate by air clearance, due to what the printing plate is free from ink up to the creation of printing pattern onto its surface, whereas supporting elements (5) are used, that prevent the said air clearance to collapse spontaneously. When the stamping member is compressed in flash moulding machine, the printing plate is pressed against the inked base plate and become inked.