GB2434426A - Air cooled roller - Google Patents
Air cooled roller Download PDFInfo
- Publication number
- GB2434426A GB2434426A GB0525315A GB0525315A GB2434426A GB 2434426 A GB2434426 A GB 2434426A GB 0525315 A GB0525315 A GB 0525315A GB 0525315 A GB0525315 A GB 0525315A GB 2434426 A GB2434426 A GB 2434426A
- Authority
- GB
- United Kingdom
- 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- Withdrawn
Links
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
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
An air cooled roller 10 comprises a cylindrical shell 12 and a central passage 14. This passage 14 has sections of reduced diameter 16, which each have a plurality of apertures or slots 18. Between the central bore 14 and the shell 12, is one ore more channel (20, figure 2), and the apertures provide additional cooling air to these channels at each reduced diameter section 16, to provide more uniform cooling. The channels may have ridges or fins (24, figure 2) to enhance heat transfer. The roller may be used in printing equipment.
Description
<p>AIR-COOLED ROLLER</p>
<p>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.</p>
<p>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.</p>
<p>Air-cooled rollers are known, where air is blown down the sides of the roller. However, such 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".</p>
<p>Water-cooled rollers are known which provide a more uniform . : temperature gradient across the roller. However 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. * * *</p>
<p>I ** * 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 al/a in printing equipment.</p>
<p>Accordingly, in one aspect the invention provides an air-cooled roller for inter a/ia 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.</p>
<p>Preferably 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.</p>
<p>Preferably the or each section comprises a plurality of apertures.</p>
<p>Preferably the channel surrounds the central bore.</p>
<p>Preferably the internal walls of the channel is uneven. Preferably still the walls are provided with a series of ridges or ribs.</p>
<p>In a second aspect there is a provided, a method of cooling a roller using air, the method 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.</p>
<p>An embodiment of the invention will now be described by way of example with reference to the following Figures in which: . . .: 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;and Figure 3 is a simplifies schematic drawing of a system comprising two rollers of Figures 1 and 2.</p>
<p>Referring to 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.</p>
<p>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.</p>
<p>As can be seen in Figure 2, four channelled apertures 20 extend longitudinally along the housing 12 between the central bore 14 and the outer surface 22 of the housing 12. Each channel 20 has an internal wall that is formed with a series of ribs or ridges 24.</p>
<p>In use, 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. * . see.</p>
<p>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. 5a*e S. C</p>
<p>The remainder of the cool air which does not pass through the slots 18a of the first section 16a continues along the central bore 14 to the second section 16b of reduced diameter. Once again, a portion of the, still cool, air passes through the slots 18b of the section 16b and into the channels 20 at that point. This ensures that cool air is directed towards the surface of the roller 10 near its centre to maintain a uniform temperature distribution across the roller 10.</p>
<p>The remainder of the cool air which does not pass through the slots 18b of the second section 16b continues along the central bore 14 to the third section 16c of reduced diameter. Once again, a portion of the, still cool, air passes through the slots 18c of the section 16c and into the channels 20 at that point. This ensures that cool air is directed towards the surface of the roller 10 near to its end to maintain a uniform temperature distribution across the roller 10.</p>
<p>The final remaining portion of cool air passes through the central bore outlet to be re-cycled.</p>
<p>As can be seen in Figure 1, the roller housing 12 is located within an outer housing 26 for assembly within, for example, a print curing machine.</p>
<p>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.</p>
<p>Figure 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. Here 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 ba, between the two rollers lOa, lOb and under the second roller lOb. In this way, both sides of the web 30 come into contact with the cooled surface of the rollers 10.</p>
<p>Although the description refers to there being four channelled * apertures 20 extending through the roller housing 12, it is clearly envisaged that these could be replaced by a single circumferential channel between the central bore 14 and the surface 22 of the roller 10.</p>
<p>The above described embodiments have been given by way of example only, and the skilled reader will naturally appreciate that many variations could be made thereto without departing from the scope of the present invention. * * * *** ***. * . * SS S. S * S 5 S...</p>
<p>S U S... I. * S S 0 S. 4S</p>
Claims (1)
- <p>Claims 1. An air-cooled roller for inter a/ia a printing machine, theroller 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.</p><p>2. A roller according to claim 1, wherein the bore comprises more than one section of reduced diameter.</p><p>3. A roller according to claim 2, wherein 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.</p><p>* 4. A roller according to any one of claims 1 to 3, wherein the or each section comprises a plurality of apertures.</p><p>5. A roller according to any one of claims 1 to 4, wherein the channel surrounds the central bore.</p><p>6. A roller according to any one of claims 1 to 5, wherein the internal walls of the channel is uneven.</p><p>7. A roller according to claim 6, wherein the walls are provided with a series of ridges or ribs.</p><p>8. A method of cooling a roller using air, the method 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.</p><p>9. An air-cooled roller substantially as hereinbefore described and referred to in the accompanying figures. * ,. -SI.</p><p>S I -S.. S. I * * * * * p U..' *5UeS * *</p>
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0525315A GB2434426A (en) | 2005-12-13 | 2005-12-13 | Air cooled roller |
PCT/GB2006/004420 WO2007068878A1 (en) | 2005-12-13 | 2006-11-27 | Air-cooled roller |
EP06820353A EP1960201A1 (en) | 2005-12-13 | 2006-11-27 | Air-cooled roller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0525315A GB2434426A (en) | 2005-12-13 | 2005-12-13 | Air cooled roller |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0525315D0 GB0525315D0 (en) | 2006-01-18 |
GB2434426A true GB2434426A (en) | 2007-07-25 |
Family
ID=35736007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0525315A Withdrawn GB2434426A (en) | 2005-12-13 | 2005-12-13 | Air cooled roller |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1960201A1 (en) |
GB (1) | GB2434426A (en) |
WO (1) | WO2007068878A1 (en) |
Families Citing this family (2)
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 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1238757A (en) * | 1968-11-20 | 1971-07-07 | ||
US5383833A (en) * | 1992-07-16 | 1995-01-24 | Sulzer-Escher Wyss Gmbh | Roll for heating or cooling running webs |
US6220161B1 (en) * | 1998-03-20 | 2001-04-24 | Heidelberger Druckmaschinen Aktiengesellschaft | Chill roller which provides uniform temperature regulation |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2209498A1 (en) * | 1972-02-29 | 1973-09-06 | Maschf Augsburg Nuernberg Ag | CHILLING ROLLER FOR TRACKS |
JPH0717052B2 (en) * | 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 | Cylinder or roller heated or cooled by using electronic cooling element and method of manufacturing the same |
DE19736339B4 (en) * | 1997-08-21 | 2004-03-18 | Man Roland Druckmaschinen Ag | Temperature control of a printing unit and temperature control device |
DE10304117A1 (en) * | 2003-01-31 | 2004-08-05 | Giesecke & Devrient Gmbh | Clamping cylinder for clamping cylindrical stamping dies for stamping rollers |
-
2005
- 2005-12-13 GB GB0525315A patent/GB2434426A/en not_active Withdrawn
-
2006
- 2006-11-27 WO PCT/GB2006/004420 patent/WO2007068878A1/en active Application Filing
- 2006-11-27 EP EP06820353A patent/EP1960201A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1238757A (en) * | 1968-11-20 | 1971-07-07 | ||
US5383833A (en) * | 1992-07-16 | 1995-01-24 | Sulzer-Escher Wyss Gmbh | Roll for heating or cooling running webs |
US6220161B1 (en) * | 1998-03-20 | 2001-04-24 | Heidelberger Druckmaschinen Aktiengesellschaft | Chill roller which provides uniform temperature regulation |
Also Published As
Publication number | Publication date |
---|---|
WO2007068878A1 (en) | 2007-06-21 |
EP1960201A1 (en) | 2008-08-27 |
GB0525315D0 (en) | 2006-01-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |