Ink supply amount control method and apparatus for printing press

An ink supply amount control apparatus for a printing press, comprising:

• a plurality of ink fountain keys which are juxtaposed;
• an ink fountain roller which is rotatably arranged near said ink fountain keys, said ink fountain roller rotating to supply ink from a gap between said ink fountain keys and said ink fountain roller to an ink supply path;
• an ink ductor roller which is arranged in the ink supply path to freely swing and supplies the ink to a printing plate on a plate cylinder by a swing operation;
• swing driving means for swinging said ink ductor roller in synchronism with rotation of the printing press;
• and
• swing control means for controlling an operation of said swing driving means on the basis of the number of ink fountain keys whose gap amount with respect to said ink fountain roller falls within a predetermined range.

A printing press including:

• an ink fountain roller;
• a plurality of ink fountain keys which are juxtaposed in an axial direction of said ink fountain roller;
• an ink ductor roller which is arranged in an ink supply path from said ink fountain roller to a printing plate;
• roller swing means for swinging said ink ductor roller in synchronism with rotation of said printing press;
• and
• swing stop means for intermittently stopping a swing operation of said ink ductor roller on the basis of an image area ratio of the printing plate,
• ink supplied from a gap between said ink fountain keys and said ink fountain roller to said ink fountain roller in accordance with rotation of said ink fountain roller being supplied to the printing plate by the swing operation of said ink ductor roller, comprising
• count means for counting the number of ink fountain keys whose gap amount with respect to said ink fountain roller falls within a predetermined range, and
• control means for controlling said swing stop means on the basis of a count value of said count means.