Plate-making apparatus for stencil printing and stencil printing machine

A plate-making apparatus for stencil printing comprising:

• a plate feed section which is adapted to feed a heat-sensitive stencil plate consisting of an extended thermoplastic resin film having a predetermined thickness and a minute recess side containing a plurality of minute recesses,
• and a heater to form ink-permeable openings in the extended thermoplastic resin film by heating a side of the extended thermoplastic resin film opposite to the minute recess side of the extended thermoplastic resin film,
• the heater having a thermal head on which two or more heater sections are arranged in a main scanning direction at one sequence or tier,
• wherein each of the heater sections is constructed so as to distribute two or more minute recesses in such area of the extended thermoplastic resin film that is in contact with the heater section,
• wherein the extended thermoplastic resin film contains an internal a tensile stress at the time of extension which remains in said extended thermoplastic resin film,
• wherein an energy output of the thermal head for heating is sufficient to fuse-penetrate the minute recess in such area of the extended thermoplastic resin film in contact with the heater section, but is not sufficient to fuse-penetrate a thick portion of the film away from the minute recess, so that openings are formed by the heated fuse penetrated portion communicating with the minute recess.