US3926115A - Spray dampening apparatus - Google Patents

Spray dampening apparatus Download PDF

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Publication number
US3926115A
US3926115A US436829A US43682974A US3926115A US 3926115 A US3926115 A US 3926115A US 436829 A US436829 A US 436829A US 43682974 A US43682974 A US 43682974A US 3926115 A US3926115 A US 3926115A
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US
United States
Prior art keywords
spray
trough
liquid
rotor
weir edge
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.)
Expired - Lifetime
Application number
US436829A
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English (en)
Inventor
Arthur Graham Alsop
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.)
2019 S&H Ltd
Original Assignee
Strachan and Henshaw 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 Strachan and Henshaw Ltd filed Critical Strachan and Henshaw Ltd
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Publication of US3926115A publication Critical patent/US3926115A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/30—Damping devices using spraying elements
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G7/00—Damping devices

Definitions

  • shutters 43 are shown. These may obtrude into a spray 37 of dampening liquid projected by projections 18 on a rotor from above a weir 25 forming one horizontal edge of a trough 26 continually fed with dampening liquid through pipe 28 so that liquid continually spills over the weir edge and the projections 18 cut into it to emerge where it spills and project the spray in a directional manner.
  • These shutters are for the purpose of controlling distribution of liquid along the length of the dampener they are not quickly or readily adjustable and are not adapted for the present purpose.
  • the solid obstructor may take the form of a shutter movable in straight-line movements into or out of the spray path, or a projecting web on a rotatable shaft which latter by rotation brings the web to a greater or lesser extent into the path of the spray.
  • FIG. 1 shows diagrammatically a printing machine incorporating a dampening apparatus
  • FIG. 2 is a sectional view of one embodiment of the apparatus of the present invention on a line C-C, FIG.
  • FIGS. 3 and 4 are sectional views (some parts being omitted in FIG. 4) on the lines A-A, B-B, respectively of FIG. 1,
  • FIG. 5 shows in a section analogous to that of FIG. 3 a second embodiment of the invention and
  • FIG. 6 shows in a section analogous to that of FIG. 3 a third embodiment of the invention.
  • FIG. 1 of the present drawings illustrates diagrammatically the positioning of this present apparatus 13', 14 in a printing machine, which is a web or sheet-fed machine. Although a perfecting offset press is shown, the apparatus may be used in other forms of printing machine.
  • a temporary spray adjustment or cut-off shutter 61 for spray produced by a rotor 15 as described in my said patent is guided on rollers on pillars 62 which are attached to the front wall 23 of the cover 63 of the apparatus 13'14'.
  • the shutter 61 moves in an approximately vertical plane seen in transverse section (FIG. 3) but with a lateral displacement since the rollers are received in obliquely inclined elongate slots 64 (FIG. 2).
  • the shutter 61 is biased to its raised position by a spring 65 anchored to the front wall 63, and is driven downwardly by a pressure cylinder 66 anchored pivotally to a top wall 67 of the apparatus by lugs 68 and to the shutter by a shackle 69.
  • Stroke of the shutter 61 is such that in its raised position indicated at line R, FIGS. 2 and 3, its lower edge is clear of the spray 37 and in its lowered position indicated at line L its lower edge interrupts all, or nearly all, of the spray.
  • the liquid of the spray caught by the shutter falls into the trough 40 from which it can drain.
  • the shutter can be operated by alternative means, e.g. solely electrically or by a purely mechanical drive.
  • a solid obstructor takes the form of a pro jecting angled web 71 on a rotatable shaft 72.
  • the shaft rotates (through the angle between the solid and dotted line positions 71) it moves from a position wherein the web 71 is clear of the spray 37 to one where the spray is Completely interrupted.
  • the response-time of this arrangement is very small.
  • the shaft may be rotated electrically or by a fluid, manual or mechanical drive.
  • a preferred arrangement is however a hydraulic piston and cylinder analogous to 66 (FIG. 2) driving a crank arm on the shaft. Air under pressure may be switched into the cylinder from an air source 74 or the cylinder may be exhausted through outlet 75 upon movements of a solenoid-operated valve 76.
  • Control of this valve may be manual through a pushbutton 77 (i.e. the operator can then temporarily adjust or cut off at will) or automatic. For an example of the latter, it would be advantageous in a sheet-fed machine for detection of a mis-feed automatically to cause cutoff of the spray, and maintain the cut-off until normal feeding is resumed. In a web-fed machine web breakage or web loss would be detected.
  • a detection unit (known per se) is indicated at 78 and is arranged to give a signal to actuate the solenoid of the valve 76. Also, of course, the control may be designed to cause only a predetermined degree of interruption of the spray 37.
  • FIG. 6 an arrangement is shown where the spray is deflected so that some or all of it is caught within the trough 40.
  • an air duct 81 fed by a pipe 82, from a source of air under pressure.
  • a slot-like aperture 84 directs air as shown by the lines 85. When air is thus blown it tends to deflect the spray 37 to the position 37 where nearly all of it is caught on the inner front wall of the trough 40 or the shutters 43.
  • This embodiment is more suitable for temporary completely cutting off the spray rather than adjusting its output: but by control of the air pressure and rate of feed of air adjustment also 3 could be provided for.
  • Air is fed into the inlet pipe 82 from a valve controlled manually or by mechanisms (e.g. a misfeed detection unit) in the printing machine.
  • an electrostatic field could be used to deflect a spray and adjust the amount of it received by the roll 11, 12 even to the extent of cutting it off.
  • the dampening apparatus having a supply trough, the trough having upstanding walls, one of said walls having a horizontal upper edge lower than upper edges of other walls thereby providing a weir edge, means for feeding liquid in the trough so that the liquid can be maintained at a given level in the trough higher than the level of the weir edge and spill continuously over the weir edge, a tangentially rigid rotor with an axis of rotation parallel to the weir edge and approximately vertically above it, thin projections on the rotor and axially spaced from one another along said axis of rotation, the said projections extending radially from and being spaced from the weir edge and extending to above the level of the weir edge and below the level of the liquid in the trough, means for rotating said rotor for causing the projections to cut into the thickness of the liquid over the weir edge to emerge where it spills from the weir edge to project directionally
  • the drive element is a fluid-pressure piston and cylinder arrangement and the control elements include a solenoid operated valve for switching pressure medium to and from the piston and cylinder and a control for an electrical power supply to the solenoid.
  • the dampening apparatus having a supply trough, the trough having upstanding walls, one of said walls having a horizontal upper edge lower than upper edges of other walls thereby providing a weir edge, means for feeding liquid in the trough so that the liquid can be maintained at a given level in the trough higher than the level of the weir edge and spill continuously over the weir edge, a tangentially rigid rotor with an axis of rotation parallel to the weir edge and approximately vertically above it, thin projections on the rotor and axially spaced from one another along said axis of rotation, the said projections extending radially from and being spaced from the weir edge and extending to above the level of the weir edge and below the level of the liquid in the trough, means for rotating said rotor for causing the projections to cut into the thickness of the liquid over the weir edge to emerge where it spills from the weir edge to project directionally
  • the dampening apparatus having a supply trough, the trough having upstanding walls, one of said walls having a horizontal upper edge lower than upper edges of other walls thereby providing a weir edge, means for feeding liquid in the trough so that the liquid can be maintained at a given level in the trough higher than the level of the weir edge and spill continuously over the weir edge, a tangentially rigid rotor with an axis of rotation parallel to the weir edge and approximately vertically above it, thin projections on the rotor and axially spaced from one another along said axis of rotation, the said projections extending radially from and being spaced from the weir edge and extending to above the level of the weir edge and below the level of the liquid in the trough, means for rotating said rotor for causing the projections to cut into the thickness of the liquid over the weir edge to emerge where it spills from the weir edge to project directionally
  • the dampening apparatus having a supply trough, the trough having upstanding walls, one of said walls having a horizontal upper edge lower than upper edges of other walls thereby providing a weir edge, means for feeding liquid in the trough so that the liquid can be maintained at a given level in the trough higher than the level of the weir edge and spill continuously over the weir edge, a tangentially rigid rotor with an axis of rotation parallel to the weir edge and approximately vertically above it, thin projections on the rotor and axially spaced from one another along said axis of rotation, the said projections extending radially from and being spaced from the weir edge and extending to above the level of the weir edge and below the level of the liquid in the trough, means for rotating said rotor for causing the projections to cut into the thickness of the liquid over the weir edge to emerge where it spills from the weir edge to project directionally
  • control elements include also a manually operable element effective to actuate the actuable means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US436829A 1973-02-01 1974-01-25 Spray dampening apparatus Expired - Lifetime US3926115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB514873 1973-02-01

Publications (1)

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US3926115A true US3926115A (en) 1975-12-16

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US436829A Expired - Lifetime US3926115A (en) 1973-02-01 1974-01-25 Spray dampening apparatus

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US (1) US3926115A (de)
DE (1) DE2404847A1 (de)
FR (1) FR2216112A2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143596A (en) * 1977-05-04 1979-03-13 Ivett Robert W Lithographic press dampening system
US4469024A (en) * 1982-10-18 1984-09-04 Press Machinery Corporation Fluid dispensing apparatus such as spray dampener for printing press and method of dispensing
US5038681A (en) * 1988-01-19 1991-08-13 Jimek International Ab Control method and apparatus for spray dampener
US5299495A (en) * 1991-07-27 1994-04-05 Koenig & Bauer Aktiengesellschaft Cylinder moistening assembly
US20040206255A1 (en) * 2003-04-16 2004-10-21 Technotrans Ag Spray damping unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128537A1 (de) * 1991-08-28 1993-03-04 Heidelberger Druckmasch Ag Verfahren zum einstellen eines fortdruckfarbprofils

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US51891A (en) * 1866-01-02 Improvement in machinery for oiling wool
US136066A (en) * 1873-02-18 johnson
US1488356A (en) * 1921-05-10 1924-03-25 Joseph Gemayel Atomizer burner
US1944876A (en) * 1929-09-03 1934-01-30 Fmc Corp Washer
US2108984A (en) * 1936-08-29 1938-02-22 Elmer C Grembecki Dampener for printing presses
US2368742A (en) * 1941-06-25 1945-02-06 Lock Joint Pipe Co Apparatus for applying plastic coatings
US2454594A (en) * 1943-09-17 1948-11-23 Niels C Christensen Method and apparatus for spraying
US2689523A (en) * 1949-04-09 1954-09-21 Roland Offsetmaschf Moistening device for the plate cylinders of printing presses
US2787955A (en) * 1952-11-13 1957-04-09 Fred K H Levey Co Inc Apparatus for supplying ink to inking rollers
US2791174A (en) * 1952-05-06 1957-05-07 Roland Offsetmaschf Device for applying liquids to cylindrical surfaces
US2889856A (en) * 1957-04-12 1959-06-09 Genevieve I Magnuson Apparatus for methods of filling measured amounts of viscous liquids or finely divided solids
US2960929A (en) * 1959-06-15 1960-11-22 Leonard G Erzinger Dampening apparatus for offset process printing presses
US2995084A (en) * 1957-07-04 1961-08-08 Aller Press As Damping device for offset printing machines
US3094065A (en) * 1959-04-06 1963-06-18 Harris Intertype Corp Dampening mechanism for lithographic printing press
US3500846A (en) * 1966-12-30 1970-03-17 Imp Eastman Corp Fluid device
US3759175A (en) * 1970-03-10 1973-09-18 Strachan & Henshaw Ltd Dampening apparatus with rotor for projecting spray

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US136066A (en) * 1873-02-18 johnson
US51891A (en) * 1866-01-02 Improvement in machinery for oiling wool
US1488356A (en) * 1921-05-10 1924-03-25 Joseph Gemayel Atomizer burner
US1944876A (en) * 1929-09-03 1934-01-30 Fmc Corp Washer
US2108984A (en) * 1936-08-29 1938-02-22 Elmer C Grembecki Dampener for printing presses
US2368742A (en) * 1941-06-25 1945-02-06 Lock Joint Pipe Co Apparatus for applying plastic coatings
US2454594A (en) * 1943-09-17 1948-11-23 Niels C Christensen Method and apparatus for spraying
US2689523A (en) * 1949-04-09 1954-09-21 Roland Offsetmaschf Moistening device for the plate cylinders of printing presses
US2791174A (en) * 1952-05-06 1957-05-07 Roland Offsetmaschf Device for applying liquids to cylindrical surfaces
US2787955A (en) * 1952-11-13 1957-04-09 Fred K H Levey Co Inc Apparatus for supplying ink to inking rollers
US2889856A (en) * 1957-04-12 1959-06-09 Genevieve I Magnuson Apparatus for methods of filling measured amounts of viscous liquids or finely divided solids
US2995084A (en) * 1957-07-04 1961-08-08 Aller Press As Damping device for offset printing machines
US3094065A (en) * 1959-04-06 1963-06-18 Harris Intertype Corp Dampening mechanism for lithographic printing press
US2960929A (en) * 1959-06-15 1960-11-22 Leonard G Erzinger Dampening apparatus for offset process printing presses
US3500846A (en) * 1966-12-30 1970-03-17 Imp Eastman Corp Fluid device
US3759175A (en) * 1970-03-10 1973-09-18 Strachan & Henshaw Ltd Dampening apparatus with rotor for projecting spray

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143596A (en) * 1977-05-04 1979-03-13 Ivett Robert W Lithographic press dampening system
US4469024A (en) * 1982-10-18 1984-09-04 Press Machinery Corporation Fluid dispensing apparatus such as spray dampener for printing press and method of dispensing
US5038681A (en) * 1988-01-19 1991-08-13 Jimek International Ab Control method and apparatus for spray dampener
US5299495A (en) * 1991-07-27 1994-04-05 Koenig & Bauer Aktiengesellschaft Cylinder moistening assembly
US20040206255A1 (en) * 2003-04-16 2004-10-21 Technotrans Ag Spray damping unit
US6901853B2 (en) * 2003-04-16 2005-06-07 Technotrans Ag Spray damping unit

Also Published As

Publication number Publication date
DE2404847A1 (de) 1974-08-08
FR2216112A2 (de) 1974-08-30

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