| 摘要 |
A flexographic ink printing machine is provided in which ink is circulated in order to prevent solidifying of the ink during a printing operation, whereby during ink supplying or ink recovering operations, high efficiency of supplying and recovering the ink can be obtained. A printing machine which includes an ink reservoir, an ink supply source, and ink delivery tubings each connecting said ink reservoir to said ink supply source, whereby the ink supplied from said ink supply source via at least one of said ink delivery tubings to said ink reservoir and accumulated therein is used for printing, said ink delivery tubings including ink recovery tubings for recovering the flexographic ink from said ink reservoir to said ink supply source, said ink recovery tubings having their ink recovery opening ends located within said ink reservoir, said ink delivery tubings including ink supply tubing for supplying the flexographic ink from said ink supply source to said ink reservoir, said ink supply tubing having its ink supply opening end located within said ink reservoir, whereby the ink within said ink reservoir is maintained in a dynamic state by supplying said flexographic ink from said ink supply source to said ink reservoir via said ink supply tubing and by recovering the flexographic ink from said ink reservoir to said ink supply source via said ink recovery tubings during the printing operation of the printing machine, wherein: said ink recovery tubings and said ink supply tubing have ink transfer means which can transfer the ink in both forward and backward directions between said ink supply source and said ink reservoir, wherein the flexographic ink is recovered from said ink reservoir to said ink supply source via said ink recovery tubings and said ink supply tubing now being used as an ink recovery tubing during ink recovering, and wherein the flexographic ink is supplied from said ink supply source to said ink reservoir via said ink supply tubing and said ink recovery tubings now being used as ink supply tubings during ink supplying.
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