Rotary press

Abstract

PURPOSE: To stabilize ink transfer rate and prevent a change in printing density by providing a cooling device in an ink fountain roller and a doctor roll, and controlling the cooling function of both cooling devices in accordance with the speed of a machine using a cooling control. CONSTITUTION: The opening of a flow control valve 21a, 21b is automatically controlled and set according to the speed of machine by means of a cooling control. This results in the supply and circulation of cooling water into a cooling device 20a provided in an ink fountain roller 5. Consequently a friction heat generated by the peripheral speed of a delivery roller 7 and the ink fountain roller 5 or a heat by ink shearing and a heat by the elastic action of a rubber on the delivery roller 7 are eliminated. At the same time, a cooling water is supplied and circulated into a cooling device 20b to dissipate a friction heat generated between a doctor blade 6b and the doctor roller, a heat by ink shearing between an ink application roller 9a, 9b and the doctor roller, a heat by the elastic action of a rubber on the delivery roller 7. COPYRIGHT: (C)1987,JPO&Japio

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    JP-S60217155-AOctober 30, 1985Isowa Ind CoInk cooling method in ink transfer mechanism of printing machine

NO-Patent Citations (0)

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Cited By (9)

    Publication numberPublication dateAssigneeTitle
    DE-4413731-A1October 26, 1995Heidelberger Druckmasch AgVerfahren zur Kontrolle der Farbführung in einer Druckmaschine
    DE-4413731-C2July 02, 1998Heidelberger Druckmasch AgVerfahren zur Steuerung der Temperatur der Druckfarbe in einer Druckmaschine
    JP-H01182048-AJuly 19, 1989Masanao OzekiTemperature adjustment-type printer
    US-5465661-ANovember 14, 1995R. R. Donnelley & Sons CompanyPrinting press temperature adjustment system
    US-5595115-AJanuary 21, 1997Man Roland Druckmaschinen AgPrinting mechanism including means for cooling and means for mounting sleeve shaped forms on transfer and form cylinders
    US-5611278-AMarch 18, 1997Sun Graphic Technologies, Inc.Temperature controlled system for printing press
    US-6109177-AAugust 29, 2000Man Roland Druckmaschinen AgFilm inking unit for a rotary printing machine
    US-6209456-B1April 03, 2001Heidelberger Druckmaschinen AgWeb- and sheet-fed printing unit using various ink types, particularly water-based inks
    US-8746143-B2June 10, 2014Heidelberger Druckmaschinen AgMethod and apparatus for compensating for inking differences in printing presses with an anilox short inking unit and printing press having the apparatus