EP1960201A1 - Rouleau refroidi par air - Google Patents

Rouleau refroidi par air

Info

Publication number
EP1960201A1
EP1960201A1 EP06820353A EP06820353A EP1960201A1 EP 1960201 A1 EP1960201 A1 EP 1960201A1 EP 06820353 A EP06820353 A EP 06820353A EP 06820353 A EP06820353 A EP 06820353A EP 1960201 A1 EP1960201 A1 EP 1960201A1
Authority
EP
European Patent Office
Prior art keywords
roller
bore
air
channel
section
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Withdrawn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
EP06820353A
Other languages
German (de)
English (en)
Inventor
Malcolm G.E.W. RAE (EC) Limited
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.)
Gew EC Ltd
Original Assignee
Gew EC Ltd
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 Gew EC Ltd filed Critical Gew EC Ltd
Publication of EP1960201A1 publication Critical patent/EP1960201A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0476—Cooling
    • B41F23/0479—Cooling using chill rolls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
    • F26B13/183—Arrangements for heating, cooling, condensate removal

Definitions

  • the present invention relates to an air-cooled roller. More especially, it relates to an air-cooled roller suitable for use in the printing industry to aid the drying and curing of ink.
  • An essential part of the printing process involves the drying and curing of ink.
  • a web of substrate carrying ink to be dried and/or cured is passed under high intensity UV lamps using a system of rollers.
  • Use of rollers allows the web to be generally unsupported as it passes under the lamps to prevent the web from being distorted, particularly if the web comprises a heat sensitive film used, for example, in the food packaging industry.
  • Air-cooled rollers are known, where air is blown down the sides of the roller.
  • cooling methods have proven to be inefficient, most notably due to fact that a temperature differential occurs across the length of the roller which results in the web being distorted in places where the roller is hotter or "less-cooled".
  • Water-cooled rollers are known which provide a more uniform temperature gradient across the roller.
  • the use of water as a coolant greatly increases the process costs, often to the extent that such a cooling method is not an option.
  • the present invention seeks to alleviate the aforementioned problems by providing an air-cooled roller designed to provide a uniform temperature gradient across the entire length of the roller, for use inter alia in printing equipment.
  • the invention provides an air-cooled roller for inter alia a printing machine, the roller comprising an elongate cylindrical housing having a central bore through which cool air can pass, and a longitudinal channel between the bore and a surface of the housing, the bore having at least one section of reduced diameter, the section having at least one aperture to allow cool air from the bore to enter the channel via the aperture.
  • the bore comprises more than one section of reduced diameter. More preferably the bore comprises three sections of reduced diameter, all of which have an aperture to provide a path of cool air from the bore to the channel at that point.
  • the or each section comprises a plurality of apertures.
  • the channel surrounds the central bore.
  • the internal walls of the channel is uneven.
  • the walls are provided with a series of ridges or ribs.
  • a method of cooling a roller using air comprising the steps of : passing cool air through a central bore of the roller; providing means to allow the air to pass from the central bore into a longitudinal channel between the bore and a surface of the roller.
  • Figure 1 is a side sectional view of a roller constructed in accordance with the present invention
  • Figure 2 is cross-section view of the roller of Figure 1 taken through A- A;
  • Figure 3 is a simplifies schematic drawing of a system comprising two rollers of Figures 1 and 2.
  • a roller 10 comprises an elongate cylindrical housing 12 with a central bore 14.
  • the central bore 14, in use, defines a channel within the roller 10 through which cool air can flow.
  • the central bore 14 has three equi-spaced sections 16 of reduced diameter.
  • the sections of reduced diameter 16 have a plurality of apertures or slots 18 formed within the respective walls of the sections 16.
  • each channel 20 has an internal wall that is formed with a series of ribs or ridges 24.
  • cool air travelling along the roller 10 through the central bore 14 reaches the first section of reduced diameter 16a whereupon the a portion of air passes through the slots 18a formed within the walls of the section 16a and into the channels 20 due to the pressure differential caused by the reduction in diameter of the bore 14 at that section 16a.
  • the air then travels along the channels 20 thereby cooling the surface wall of the roller 10.
  • the ridges 24 of the internal wall of the channels 20 increases the heat transfer thereby providing efficient cooling of the roller surface 20.
  • the roller housing 12 is located within an outer housing 26 for assembly within, for example, a print curing machine.
  • the outer housing 26 includes an inlet section 28 to which a pipe or tube (not shown) can be attached to provide cool air into the roller housing 12.
  • FIG 3 provides a simplified schematic illustration of how air-cooled two rollers 10 can be provided in a printing assembly to provide efficient cooling of both sides a web 30.
  • the two air-cooled rollers 10 are provided one above the other and the web 30 travels in an "S" formation over the first roller 10a, between the two rollers 10a, 10b and under the second roller 10b. In this way, both sides of the web 30 come into contact with the cooled surface of the rollers 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Textile Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

Rouleau (10) doté d'une enveloppe (12) cylindrique munie d'un alésage central (14) de diamètre variable et d'un conduit (20) entre l'alésage (14) et l'enveloppe (12). De l'air peut circuler de l'alésage dans le conduit. L'invention concerne notamment un rouleau refroidi par air conçu pour donner un gradient de température uniforme sur toute la longueur du rouleau en vue d'une utilisation, entre autres, dans les équipements d'impression.
EP06820353A 2005-12-13 2006-11-27 Rouleau refroidi par air Withdrawn EP1960201A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0525315A GB2434426A (en) 2005-12-13 2005-12-13 Air cooled roller
PCT/GB2006/004420 WO2007068878A1 (fr) 2005-12-13 2006-11-27 Rouleau refroidi par air

Publications (1)

Publication Number Publication Date
EP1960201A1 true EP1960201A1 (fr) 2008-08-27

Family

ID=35736007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06820353A Withdrawn EP1960201A1 (fr) 2005-12-13 2006-11-27 Rouleau refroidi par air

Country Status (3)

Country Link
EP (1) EP1960201A1 (fr)
GB (1) GB2434426A (fr)
WO (1) WO2007068878A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9605898B2 (en) * 2013-03-07 2017-03-28 Ricoh Company, Ltd. Drum temperature control for a radiant dryer of a printing system
US9827797B1 (en) * 2017-02-17 2017-11-28 Ricoh Company, Ltd. Cross-flow cooling systems for continuous-form print media

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601902A (en) * 1968-11-20 1971-08-31 Voith Gmbh J M Drying cylinder for webs
DE2209498A1 (de) * 1972-02-29 1973-09-06 Maschf Augsburg Nuernberg Ag Kuehlwalze fuer warenbahnen
JPH0717052B2 (ja) * 1991-07-05 1995-03-01 ボールドウィン プリンティング コントロールズ リミテッド 電子冷熱素子を利用して加熱または冷却されるシリンダまたはローラおよびその製造方法
DE4223359A1 (de) * 1992-07-16 1994-01-20 Escher Wyss Gmbh Heiz- oder Kühlwalze
DE19736339B4 (de) * 1997-08-21 2004-03-18 Man Roland Druckmaschinen Ag Temperierung eines Druckwerkes und Temperiereinrichtung
DE19812149A1 (de) * 1998-03-20 1999-09-23 Heidelberger Druckmasch Ag Kühlwalze
DE10304117A1 (de) * 2003-01-31 2004-08-05 Giesecke & Devrient Gmbh Spannzylinder zum Aufspannen zylindrischer Prägeformen für Prägewalzen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007068878A1 *

Also Published As

Publication number Publication date
WO2007068878A1 (fr) 2007-06-21
GB0525315D0 (en) 2006-01-18
GB2434426A (en) 2007-07-25

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