EP0325021A3 - Circulation system and method for reducing foaming in the dampening system of a printing press - Google Patents

Circulation system and method for reducing foaming in the dampening system of a printing press Download PDF

Info

Publication number
EP0325021A3
EP0325021A3 EP88307801A EP88307801A EP0325021A3 EP 0325021 A3 EP0325021 A3 EP 0325021A3 EP 88307801 A EP88307801 A EP 88307801A EP 88307801 A EP88307801 A EP 88307801A EP 0325021 A3 EP0325021 A3 EP 0325021A3
Authority
EP
European Patent Office
Prior art keywords
circulation system
sump
reducing
foaming
wetting fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88307801A
Other languages
German (de)
French (fr)
Other versions
EP0325021A2 (en
Inventor
Robert W. Macdonald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baldwin Technology Corp
Original Assignee
Baldwin Technology Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baldwin Technology Corp filed Critical Baldwin Technology Corp
Publication of EP0325021A2 publication Critical patent/EP0325021A2/en
Publication of EP0325021A3 publication Critical patent/EP0325021A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0054—Devices for controlling dampening

Abstract

A circulation system for reducing foaming of the water or water and isopropanol wetting fluid circu­ lating in a printing press, comprises a fountain pan (20) which drains into a vented return conduit (26). The vent exhausts air drawn into the circulation system to minimize foaming. A sump (36) is provided at a low point in the circulation system to prevent air entrainment in the system during start up. Wetting fluid is drawn from the sump (36) by a venturi tube (38) calibrated to provide a sufficient amount of suction that will drain the sump (36) but which will not draw air into the circulation system from the fountain pan (20). The venturi tube (38) has at least one, and preferably two orifices (52, 54) therein. The circulation system allows increased wetting fluid flow rates while reducing foaming, reducing the tempera­ ture increase across the fountain pan inlet and outlet by one-half of that of prior art devices.
EP88307801A 1988-01-12 1988-08-23 Circulation system and method for reducing foaming in the dampening system of a printing press Withdrawn EP0325021A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14299388A 1988-01-12 1988-01-12
US142993 1988-01-12

Publications (2)

Publication Number Publication Date
EP0325021A2 EP0325021A2 (en) 1989-07-26
EP0325021A3 true EP0325021A3 (en) 1990-03-21

Family

ID=22502109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307801A Withdrawn EP0325021A3 (en) 1988-01-12 1988-08-23 Circulation system and method for reducing foaming in the dampening system of a printing press

Country Status (3)

Country Link
EP (1) EP0325021A3 (en)
JP (1) JPH01180341A (en)
CN (1) CN1038970A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038021A1 (en) * 1990-11-29 1992-06-04 Edelmann Gmbh & Co Kg Feed-back for moisture medium in wet offset printing machine - involves return flow pipe from machine discharging over fluid level in storage tank
DE4211656A1 (en) * 1992-04-07 1993-10-14 Technotrans Gmbh Process and device for recycling polluted process water
US5622620A (en) * 1994-07-08 1997-04-22 Pall Corporation Apparatus for treating fountain solution
US6293199B1 (en) * 2000-07-07 2001-09-25 Baldwin Graphicssystems, Inc. Printing press circulation system
US6651555B2 (en) * 2000-09-25 2003-11-25 Day International, Inc. Dampening solution recirculator
US8763617B2 (en) 2009-06-24 2014-07-01 Saint-Gobain Abrasives, Inc. Material removal systems and methods utilizing foam
CN108705848B (en) * 2018-04-28 2019-10-01 重庆川之舟印务设计有限公司 Fountain solution purification device
CN111114099B (en) * 2020-02-06 2021-10-22 台州市雨免电子商务有限公司 Printing device for paperboards

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352317A (en) * 1964-12-09 1967-11-14 Dahlgren Mfg Company Inc Dampening fluid cooling and circulating apparatus for lithographic offset press dampening device
EP0170160A2 (en) * 1984-08-01 1986-02-05 WEB ITALIA S.r.l. A feeding installation for the dampening solution in offset printing process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352317A (en) * 1964-12-09 1967-11-14 Dahlgren Mfg Company Inc Dampening fluid cooling and circulating apparatus for lithographic offset press dampening device
EP0170160A2 (en) * 1984-08-01 1986-02-05 WEB ITALIA S.r.l. A feeding installation for the dampening solution in offset printing process

Also Published As

Publication number Publication date
CN1038970A (en) 1990-01-24
JPH01180341A (en) 1989-07-18
EP0325021A2 (en) 1989-07-26

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