Method and apparatus for adjusting ink supply amount for multicolor printing press
AssigneeKomori Corporation
InventorsToshikazu Tomita, Teruhiko Hama
Life of this patent
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Abstract
In an ink supply amount adjusting method for this printing machine, reference opening amounts of ink fountain keys in units of ink colors are obtained in accordance with image area ratios of respective areas, corresponding to the ink fountain keys, of a plate by following a relationship between an image area ratio and opening amounts of the ink fountain keys, the relationship being preset to be common to the respective ink colors. The obtained reference opening amounts are uniformly corrected with correction values preset in units of ink colors, thereby obtaining preset values of the opening amounts of the ink fountain keys in units of ink colors. An ink supply amount adjusting apparatus is also disclosed.
Claims20
An ink supply amount adjusting method for a multicolor printing press which performs multicolor printing with a plurality of printing units provided to correspond to a plurality of ink colors, each of said printing units having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising the steps of
- obtaining reference opening amounts of said ink fountain keys in units of ink colors in accordance with image area ratios of respective areas, corresponding to said ink fountain keys, of said plate by following a relationship between an image area ratio and opening amounts of said ink fountain keys, the relationship being preset to be common to the respective ink colors, and
- uniformly correcting the obtained reference opening amounts of said ink fountain keys in units of ink colors with correction values preset in units of ink colors, thereby obtaining set values of the opening amounts of said ink fountain keys in units of ink colors.
An ink supply amount adjusting method for a multicolor printing press which performs multicolor printing with a plurality of printing units provided to correspond to a plurality of ink colors, each of said printing units having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising the steps of
- uniformly presetting correction values of opening amounts of said ink fountain keys in units of ink colors,
- correcting origin positions of the opening amounts of said ink fountain keys in units of ink colors by using the preset correction values, and
- setting the opening amounts of said ink fountain keys of the respective ink colors in accordance with image area ratios of respective areas, corresponding to said ink fountain keys, of said plate of the respective ink colors by following a relationship, preset to be common to the ink colors, between an image area ratio and the opening amounts of said ink fountain keys.
An ink supply amount adjusting method for a multicolor printing press which performs multicolor printing with a plurality of printing units provided to correspond to a plurality of ink colors, each of said printing units having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising the steps of
- presetting correction values of feed rates of said ink fountain rollers in units of ink colors, and
- correcting a reference feed rate of said ink fountain roller preset to be common to the ink colors by using the preset correction values, thereby setting the feed rates of said ink fountain rollers of the respective ink colors.
An ink supply amount adjusting apparatus for a multicolor printing press which performs multicolor printing with a plurality of printing units provided to correspond to a plurality of ink colors, each of said printing units having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising
- first calculating means for obtaining reference opening amounts of said ink fountain keys in units of ink colors in accordance with image area ratios of respective areas, corresponding to said ink fountain keys, of said plate by following a relationship between an image area ratio and opening amounts of said ink fountain keys, the relationship being preset to be common to the respective ink colors, and
- second calculating means for uniformly correcting the reference opening amounts of said ink fountain keys of the respective ink colors output from said first calculating means with correction amounts preset in units of ink colors, thereby obtaining set values of the opening amounts of said ink fountain keys of the respective ink colors.
An ink supply amount adjusting apparatus for a multicolor printing press which performs multicolor printing with a plurality of printing units provided to correspond to a plurality of ink colors, each of said printing units having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising
- correction means for correcting origin positions of the opening amounts of said ink fountain keys of the respective ink colors by using the correction values of the opening amounts of said ink fountain keys preset in units of ink colors, and
- first calculating means for obtaining set values of the opening amounts of said ink fountain keys of the respective ink colors in accordance with image area ratios of respective areas, corresponding to said ink fountain keys, of said plate of the respective ink colors by following a relationship, preset to be common to the respective ink colors, between an image area ratio and the opening amounts of said ink fountain keys.
An ink supply amount adjusting apparatus for a multicolor printing press which performs multicolor printing with a plurality of printing units provided to correspond to a plurality of ink colors, each of said printing units having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising
- setting means for setting correction values of feed rates of said ink fountain rollers in units of ink colors, and
- first calculating means for correcting a reference feed rate of said ink fountain roller preset to be common to the ink colors by using the correction values obtained by said setting means, thereby obtaining set values of the feed rates of said ink fountain rollers of the respective ink colors.
Dependencies are inferred from the claim text.