Tower type multi-color printing press

• US 6,178,883 B1
• Filed: 09/22/1998
• Issued: 01/30/2001
• Est. Priority Date: 11/26/1997
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Tokyo Kikai Seisakusho
• Original Assignee: Tokyo KIKI Kabushiki Kaisha
• Inventors: Satoh, Masayoshi, Tomita, Yuko
• Primary Examiner(s): Yan, Ren
• Assistant Examiner(s): Nguyen, Anthony H.
• Application Number:
  US09/158,514
• Time in Patent Office: 861 Days
• Field of Search: 101/220, 101/487, 101/488, 101/424, 101/178, 101/179
• US Class Current: 101/220
• CPC Class Codes: B41F 23/0413 Infrared dryers
• CPC Class Codes: B41F 23/0426 using heated air
• CPC Class Codes: B41F 23/044 Drying sheets, e.g. between two printing stations B41F23/0486 takes precedence
• CPC Class Codes: B41F 23/0476 Cooling B41F23/0483 takes precedence

Abstract

A tower type multi-color printing press has heating means which is constructed in compact and simple in structure to require lesser space for installation, to lower production cost, to facilitate inspection and maintenance and to reduce frequency of occurrence of failure. The tower type multi-color printing press includes a plurality of printing sections provided with stacking in vertical direction, and heating means provided on downstream side of each printing section and extending in a width direction of a paper web fed through a path across each printing section, for heating a printed surface of the paper web every time completing the printing in each printing section.

Claims

1. A tower type multi-color printing press comprising:

a plurality of vertically stacked printing sections, each configured to print a paper web fed therethrough along a printing path formed by the plurality of printing sections by supplying an ink and a dampening water via a blanket, wherein the printing path has an upstream direction and a downstream direction and the paper web is fed from the bottom to the top of the printing press;

a plurality of heating means for heating a printed surface of the paper web, each configured to extend in a transverse direction of the paper web, wherein the number of heating means corresponds to the number of printing sections, a heating means is provided on the downstream side of each of the plurality of printing sections and is configured to heat the printed surface of the paper web after passing through the printing section upstream therefrom, and

a cooling means for cooling the printed surface of the paper web, wherein the cooling means is provided only on the downstream side of an ultimate heating means and is configured to cool the printed surface of the paper web after passing the ultimate heating means;

wherein the heating means is adapted to heat a printed image on the paper web after passing through each of the printing sections to evaporate a solvent of the ink and soften the ink, the dampening water supplied to each of the printing sections on the downstream side of each of the heating means is adapted to cool the ink softened by the heating with each of the heating means and the cooling means is adapted to cool the ink softened by the heating with the ultimate heating means, to cure the ink to be stable on the paper web.