EP1516677A1 - Barre de distribution d'air partitionnée - Google Patents

Barre de distribution d'air partitionnée Download PDF

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Publication number
EP1516677A1
EP1516677A1 EP03255803A EP03255803A EP1516677A1 EP 1516677 A1 EP1516677 A1 EP 1516677A1 EP 03255803 A EP03255803 A EP 03255803A EP 03255803 A EP03255803 A EP 03255803A EP 1516677 A1 EP1516677 A1 EP 1516677A1
Authority
EP
European Patent Office
Prior art keywords
air
bar
distribution bar
segmented
air distribution
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Withdrawn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
EP03255803A
Other languages
German (de)
English (en)
Inventor
Sandor Szarka
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.)
Kompac Technologies LLC
Original Assignee
Varn Products Co Inc
Varn Products Co
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 Varn Products Co Inc, Varn Products Co filed Critical Varn Products Co Inc
Priority to EP03255803A priority Critical patent/EP1516677A1/fr
Publication of EP1516677A1 publication Critical patent/EP1516677A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/007—Removing water from ink trains

Definitions

  • the subject invention relates generally to a segmented air distribution bar and, more particularly, to a segmented air distribution bar having air control valves along the length of the bar to enable a user to incrementally adjust the amount of air that is distributed across the width of a roller in a printing press.
  • the present invention incorporates a so-called “air-knife” or “air amplifier” of the sort which drives a relatively small volume of air along a wall surface, such that the air adheres to that wall surface. This phenomenon is called the “coanda” effect.
  • This small volume of air creates suction in the adjacent air which pulls in very high volumes of air along with the relatively small volume of air. Amplifications of air volumes on the order of 30 to 1 may be achieved with such air amplifiers.
  • the structure necessary to achieve the coanda effect includes essentially a thin, elongated slot or nozzle formed in a housing member adjacent to a wall face that curves around a bend. Typically, this bend can be up to 90 degrees.
  • a relatively high-velocity, relatively low-volume air flow is driven along that curved wall face from the slot.
  • By maintaining the slot to a desired relatively thin opening, and by controlling the contour of the wall face it is possible to ensure that the relatively high-velocity, relatively low-volume air adheres to the wall face and is driven around the curve of the wall face. This, in turn, creates a suction adjacent to the slot which entrains a relatively high quantity of air.
  • the structure of the amplifier itself is known to those of ordinary skill in the art, and is commonly available on the market.
  • One such amplifier is available under the trade name Exair Air Knife from Exair Corporation (Cincinnati, OH).
  • Exair Air Knife from Exair Corporation (Cincinnati, OH).
  • Those of ordinary skill in the art will be aware of the dimensions and parameters of operation necessary to create the coanda effect and resulting air amplification results.
  • a device that makes use of the coanda effect is disclosed in U.S. Patent No. 5,313,685, to Sundwiger Eisenhutte, the contents of which are incorporated by reference herein.
  • the device is for removing liquid from the surface of a moving steel strip by means of air blown onto the moving strip from a device having a slot nozzle which is disposed transversely to the direction in which the strip is moving and is directed at the surface of the strip at an angle of between about 45 and 90 degrees opposite to the direction of the strip movement.
  • the device further includes a means for suctioning off any liquid that is removed from the surface of the strip.
  • U.S. Patent No. 5,491,602 to Paul Horn, et al., the contents of which are incorporated by reference herein. More particularly, disclosed is an air amplifier system incorporating an ionizing device including a converter driven by the compressed air being directed to an air distributor.
  • the converter provides the power source for the ionizing apparatus.
  • the air distributor and ionizing apparatus can be an easily contained unit.
  • the system may comprise a turbine which is electrically connected to an ionizing apparatus, such as an ionizing bar.
  • the present invention incorporates a so-called "air-knife” or “air amplifier” of the sort that takes advantage of the coanda effect, which drives a relatively small volume of air along a wall surface, such that the air adheres to that wall surface.
  • This small volume of air creates suction in the adjacent air which pulls in very high volumes of air along with the relatively small volume of air.
  • Amplifications of air volumes on the order of 30 to 1 may be achieved with such air amplifiers.
  • Existing systems that incorporate air-knives such as disclosed in U.S. Patent No. 5,490,300 and U.S. Patent No. 5,491,602, are lacking in that they do not provide a way to alter the flow of the air across the width of the air bar.
  • Each printing head of an off-set lithographic printing press consists of several basic components and assemblies: an ink train, a dampening system, a printing plate and plate cylinder, a blanket and blanket cylinder, and an impression cylinder. These components and assemblies cooperate to lay the proper ink image and ink film thickness on the sheet or web.
  • Fig. 1 is a perspective view of three (3) inking rollers 20 from a portion of a printing head.
  • rollers are attached to the sideframes of the printing head by roller carriers, which may be either fixed to the sideframe or moveable to allow the rollers to be separated when the printing head is not in use.
  • An air bar 22 is mounted adjacent to the inking rollers 20 with two (2) pivot studs 24, two (2) clamping arms 26 and a tie rod 28.
  • the tie rod 28 is rigidly mounted to the sideframes of the printing head. Air is supplied to the air bar through air supply tube 30. An operator controls the flow of air across the width of the rollers using incremental flow control adjusting knobs 32.
  • Fig. 2 taken from Fig. 1, is a side view illustrating the air bar 22 (in cross section) assembled to the printing head with an air bar clamping arm 26 (in cross section) and swung into the "on” position.
  • the direction of movement that the air bar 22 is moved in order to locate it into the "on” position is identified by arrow "A".
  • the "on" position is where the air bar is positioned sufficiently close to an inking roller 20 so that the air flow 34 caused by the air bar 22 tends to evaporate fountain solution from the emulsified ink on the inking roller 20.
  • the air bar may be moved into an "off position by moving the air bar 22 in the direction of the arrow identified by arrow "B".
  • Each clamping arm 26 includes an upper clamp 36 and a lower clamp 38.
  • the upper clamp 36 and lower clamp 38 are attached to each other with shoulder bolts 40.
  • a spring 42 Between the head of each shoulder bolt 40 and the bottom of each counterbore in which they reside is a spring 42.
  • This configuration allows the clamping arms 26 to pivot about the tie rod 28 in the direction of arrows "A” and "B” and also allows the air bar 22 to pivot about pivot studs 24 in the direction of arrows "C” and "D".
  • This arrangement allows a press operator to precisely position the air bar 22 in a position that is most effective in removing fountain solution from emulsified ink on the inking rollers 20.
  • Fig. 3 taken from Fig. 1 and rotated 180 degrees, is a rear view illustrating the air bar 22 without the air bar clamping arms 26, tie rod 28, and inking rollers 20.
  • Fig. 4 taken from Fig. 3, is a cross-sectional view of the air bar.
  • the air bar 22 is shown to include a body 44 to which is attached an air guide plate 46 with attachment fasteners 48.
  • the body 44 includes a main air passageway 50 extending its length. Air is supplied to the passageway 50 through air supply tube 30 via an air tube connector 31 The opposite end of the an passageway 50 is closed off with a threaded plug 33.
  • Body 44 further includes an air supply cavity 52 for each flow control knob 32.
  • Each air supply cavity 52 is in fluid communication with the air passageway 50 via an air port 54.
  • the air guide plate includes precision air gap recesses 56 - one for each air supply cavity 52.
  • Fig. 5 is a perspective view of an air guide plate showing the precision air gap recesses 56.
  • a press operator decides that he has fountain solution emulsified in an inking roller 20
  • the operator adjusts the air bar 22 from the "off position to the "on” position.
  • the operator then turns the air supply on (and adjusts the pressure as necessary), which provides air through the air supply tube 30 to the air passageway 50 of the body 44.
  • the operator may then adjust the flow of air to each segment across the width of the inking roller 20, depending on where emulsification is occurring.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP03255803A 2003-09-17 2003-09-17 Barre de distribution d'air partitionnée Withdrawn EP1516677A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03255803A EP1516677A1 (fr) 2003-09-17 2003-09-17 Barre de distribution d'air partitionnée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03255803A EP1516677A1 (fr) 2003-09-17 2003-09-17 Barre de distribution d'air partitionnée

Publications (1)

Publication Number Publication Date
EP1516677A1 true EP1516677A1 (fr) 2005-03-23

Family

ID=34178612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03255803A Withdrawn EP1516677A1 (fr) 2003-09-17 2003-09-17 Barre de distribution d'air partitionnée

Country Status (1)

Country Link
EP (1) EP1516677A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9908158B2 (en) 2014-03-10 2018-03-06 Ametek, Inc. Air flow mechanism for image capture and vision systems

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999696A (en) * 1975-05-27 1976-12-28 Crown Zellerbach Corporation Web threading system
US4014487A (en) * 1976-03-31 1977-03-29 Crown Zellerbach Corporation Web threading system
US4477287A (en) * 1983-02-08 1984-10-16 Kaiser Aluminum & Chemical Corporation Liquid removal device
US4524689A (en) 1982-09-13 1985-06-25 Lemaster Milton R Dehydration apparatus for printing press inking system
DE3816250A1 (de) * 1988-05-11 1989-11-23 Researchvereniging Nl Kleding Verfahren und vorrichtung zum abnehmen der oberen lage eines stapels
US5085142A (en) 1988-03-08 1992-02-04 Smith Maurice D Dampening fluid evaporator
US5313685A (en) 1991-05-17 1994-05-24 Sundwiger Eisenhutte Maschinenfabrik Gmbh Device for removing liquid from the surface of a moving strip
US5454310A (en) 1994-11-16 1995-10-03 Varn Company Segmented oscillating fluid evaporator roller for printing presses
US5490300A (en) 1994-04-25 1996-02-13 Horn; Paul E. Air amplifier web cleaning system
US5491602A (en) 1995-05-12 1996-02-13 Paul Horn Enterprises, Inc. Air distributing and ionizing systems
US6055905A (en) * 1999-08-19 2000-05-02 Lemaster; Milton R. Dual air curtain apparatus for reducing infiltration of dampening solution in a lithographic printing press
US20020003022A1 (en) * 2000-05-16 2002-01-10 Csida Jason Gene Presentation and bonding of garment side panels

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999696A (en) * 1975-05-27 1976-12-28 Crown Zellerbach Corporation Web threading system
US4014487A (en) * 1976-03-31 1977-03-29 Crown Zellerbach Corporation Web threading system
US4524689A (en) 1982-09-13 1985-06-25 Lemaster Milton R Dehydration apparatus for printing press inking system
US4477287A (en) * 1983-02-08 1984-10-16 Kaiser Aluminum & Chemical Corporation Liquid removal device
US5085142A (en) 1988-03-08 1992-02-04 Smith Maurice D Dampening fluid evaporator
DE3816250A1 (de) * 1988-05-11 1989-11-23 Researchvereniging Nl Kleding Verfahren und vorrichtung zum abnehmen der oberen lage eines stapels
US5313685A (en) 1991-05-17 1994-05-24 Sundwiger Eisenhutte Maschinenfabrik Gmbh Device for removing liquid from the surface of a moving strip
US5490300A (en) 1994-04-25 1996-02-13 Horn; Paul E. Air amplifier web cleaning system
US5454310A (en) 1994-11-16 1995-10-03 Varn Company Segmented oscillating fluid evaporator roller for printing presses
US5491602A (en) 1995-05-12 1996-02-13 Paul Horn Enterprises, Inc. Air distributing and ionizing systems
US6055905A (en) * 1999-08-19 2000-05-02 Lemaster; Milton R. Dual air curtain apparatus for reducing infiltration of dampening solution in a lithographic printing press
US20020003022A1 (en) * 2000-05-16 2002-01-10 Csida Jason Gene Presentation and bonding of garment side panels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9908158B2 (en) 2014-03-10 2018-03-06 Ametek, Inc. Air flow mechanism for image capture and vision systems

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