US1659179A - Powder-distributing machine - Google Patents

Powder-distributing machine Download PDF

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US1659179A
US1659179A US113633A US11363326A US1659179A US 1659179 A US1659179 A US 1659179A US 113633 A US113633 A US 113633A US 11363326 A US11363326 A US 11363326A US 1659179 A US1659179 A US 1659179A
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Prior art keywords
powder
nozzle
distributing
pipe
valve
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US113633A
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Wilson Louis
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B L Nicholes & Co Inc
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B L Nicholes & Co Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
    • 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
    • B41F23/06—Powdering devices, e.g. for preventing set-off
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/01—Anti-offset

Definitions

  • Fig. 1 shows a side elevation of my mechanism in prospective
  • Fig. 2 shows a plan view of my mechanism
  • Fig. 3 shows a sec tion plan view on the lines 3-3 of Fig. 1
  • Fig. 4 shows a sectional view on the lines 44 of Fig. 1
  • Fig. 5 shows a sectional view of a rotating ball valve and air nozzle pipe connections, etc
  • Fig. 6 shows a side view of the revolving ball valve
  • Figs. 7 and 8 are detail views of the powder distributing nozzle and its pipe connections.
  • My mechanism is mounted on the frame, A, which may be secured to the floor by any of the usual means.
  • the rollers, 1, and 2 are mounted on the frame A.
  • the roller, 1, mav be operated by the pulley, 3, driven by a belt, 4, from a pulley, 5, on the motor, 6.
  • the meshed belt carrier, 7, which is preferably of wire mesh, stretches between the two rollers 1. and 2, and is operated by the roller 1; it is preferably substantially the same width as the rollers, 1, and 2.
  • This meshed belt carrier receives the wet printed matter to be powdered at 3, and this matter is carried tln'ough the machine on this meshed belt carrier.
  • Above the meshed belt carrier is the cover B which encloses the meshed belt carrier and the top of the frame A.
  • A, I provide the supporting shelf, 11, on which is secured the motor, 12, and the blower, 13.
  • the blower, 13, is provided with the air supply reservoir pipe, 14, from 1926. Serial No. 113,633.
  • the powder collecting and supply receptacle, C which is preferably of the form shown in Figs. 1 and 4.
  • This screen preferably covers the bottom of this distributor, 18, as shown in Figs. 1 and 4.
  • the powder supply receptacle, C is provided with the door, 20, for the purpose of supplying powder to the receptacle, C, and as a means of access to its interior.
  • the blower, 13, which is operated by the motor, 12, is provided with the outlet, 14, which is preferably considerably larger in diameter than the connecting pipes, 15, 16 and 17, in order that it may contain and furnish a reserve supply of compressed air.
  • the outlet pressure of this compressed air in the pipes 15, 16, and 17 is controlled by the valves 21, 22, and 23.
  • the distributingpowder pipe, 15, is supplied with a distributing nozzle, 24, shown in Fig. 7, (front view) and Fig. 1 (end view) this nozzle distributes the powder over the wet printed matter as it passes beneath this nozzle, carried thereunder by the meshed belt carrier, 7.
  • the discharge end of this distributing nozzle preferably points slightly toward the rear end of the machine, as shown in Fig. 1.
  • the pipe 16 leads to the blow-off nozzle, 25, and is connected. therewith at 26; this nozzle, 25, is shown in Fig. 4 (front view) and in Fig. 1 (end view), and the air cur rent from this nozzle blows oil the surplus powder from the printed matter after it has passed under the nozzle, 24, and before the printed matter leaves the machine.
  • the discharge end of this blow-off nozzle preferably points slightly toward the front end of the machine as shown in Fig. 1.
  • a baking oven, 27, is secured to the frame.
  • A as shown in Fig. 1, and the pi e, 17, with its controlling valve, 23, may e used to supply a current of compressed air to cool the sheets as they pass from the baking oven, 27.
  • the blower intake creates a partial vacuum under the powder distributor, 18, and above the screen, 1.), and separates the exc air from the powder, leaving the powder substantially free from excess air and; in a normal condition;
  • valve, :29 a view of ,which (in section)" is shown" in Fig. '5, and (in plan) in Fig. (i.
  • This revolving valve controls the powder 7 supply to the powder distributing"pipe, 1.5, and is operatedby ahelt itrom pulley, 30, on the rolle'i, 2. The pulley, 30, and.
  • the pulley onthe revolving valve, 29, are referably cone or step pulleys, which permit a speedcontrol' ot the revolving valve, 29,
  • This revolving valve, 29, in turn controls the powder SI'IPPlTytO the powder distributing pipe,
  • the connectingconstruction between the air reserve supply pipe, 14, and the powder distributing pipe, 15, and the construction to control the amount of'the powder sluiiply to the powder distributing'pipe,1.5, is shown in 5 (in section) and in Fig. (in elevation).
  • the air pressure to the nozzle, 31, is controlled by the valve, 21.
  • the spring, 37 may be provided to' agitate the powder above the ri-ivolving valve, 29.
  • the method of operation: of'niy device is as follows A supply of the powdeifito be distributed upon the wet printed matter is placed in the powder supply receptacle, C.
  • the wet printed matter tobe powdered is placed or-ino ve'd' upon'the meshed b elt carrier, 7, which carrio's the wet printed matter under the powder distributingnozzle, 24, and froni this nozzle the :)ow(;ler isklistributod over the printedmatterl Powder from the powder supply receptacle, C, is supplied to the powder distributing pipe, 15," through the revolving" valve, 29, and is conveyed through the powder distributiug pipe, 15,-to the powder distributing nt'izz le, by the com press'odair pressure ti'oiu'the blower, 1.3, and the reserve air-reservoir pi pe, '14-.
  • the meshed'belt carrier, 7, carries the wet printed matter toward the rear endbtthe machine where it passes under the blow-oil nozzle, 25, air ptrom which blows the surplus powder from the printed 'ma'tter, the surplus powder dropping upon the powder distributor, 18,- and then into the supply recep table, 0.
  • This partition, 35,- prevents clogging of the powder, :)art ially separates the powder-from the air, the pow- 24 above the partition, 35; and the airpass- :br the mostpaii't, below the piirtition, 35.
  • blower, 13,- and the several pulleys may be operated by other means and their speed'regulated other than the means'shown', and tliat the parts of my machine may be otherwiserelatively located, without departing from my invc.n
  • a powder distributing mechanism of the character described consisting of a meshed belt'carrier and means for operating same,- a powder distributing nozzle extending across saichcar'rier, a powder supply-reservoir, means for supplyingcompre'ssed air as an operatingineans for conveying powder from said powder supply reservoir to said powder distributing nozzle and for removingthe surplus powder from the printed matter, means for regulating and controlling the" quantity of powder to be distributed from said powdersupply receptacle to said powdr distributing nozzle consisting of a revolving-bucketvalve installed between said powder supply; reservoirand said powder, supplydistributing page:
  • a powder distributing mechanism of the character described consisting of a meshed belt carrier and. means for operating same, a powder distributing nozzle extending across said. carrier, a powder supply reservoir, means for supplying compressed air as an operating means for conveying powder from the powder supply reservoir to the powder distributing nozzle and for removing surplus powder from the printed matter, means for regulating and controlling the quantity of powder to be distributed from the powder supply reservoir to the powder distributing nozzle, consisting of a revolving bucket valve, means for agitating the powder in the supply reservoir consisting of spaced springy prongs secured at one end within the supply reservoir above the revolving valve, with their free ends normally sprung against the top of the buckets of the revolving valve, and moved up and down when the valve revolves.
  • a powder distributing mechanism of the character described consisting of a meshed belt carrier and means for operating same a powder distributing nozzle extend ing across said carrier, a powder supply reservoir, means tor supplying compressed'air as an operating means :t'or conveying powder from said powder supply reservoir to said powder distributingnozzle and for removing the surplus powder from the printed matter and conveying said si'irplus powder to said powder supply reservoir, me: us for regulating and predetcrmining the quantity of powder to be distributed from said pow der supply reservoir to said powder distribnting nozzle consisting of a revolving bucket valve installed between said powder supply reservoir and said powder supply distributing pipe, and means for regulating the speed of said revolving valve consisting oi cone pulleys installed upon the driving and driven shaft of said revolving valve and a driving belt connecting said cone pulleys.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)

Description

Feb. 14, 1928. 1,659,179
L. WILSON Y POWDER DISTRIBUTING MACHINE Filed June 4 1926 3 Sheets-Sheet 1 "1 ii v 0C INVENTOR. H i LW g /T TTORNEX Feb. 14, 1928.
1.. WILSON POWDER DISTRIBUTING MACHINE Filed June 4. 1926 s Sheets-Sheet 2 INVENTOR.
ATTORNEY.
L. WILSON POWDER DISTRIBUTING MACH INE Feb. 14 1928.
Filed June 4. 1926 3 Sheets-Sheet 5 4; mam,
INV EN TOR,
A TTORNEY Patented Feb. 14, 1928.
UNITED STATES LOUIS WILSON, OF BROOKLYN, NEW YORK, ASSIGNOR, BY DIRECT AND MESNE AS- SIGNMENTS, TO B. L. NICHOLES 80' CO. INC, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.
Application filed June 4,
and includes the removal from the printed matter of all surplus powder, the collection of such surplus powder in a receptacle from which it may be taken for subsequent use, and; means whereby the surplus powder,
after the same has been collected, may be mechanically conveyed for immediate re-use without rehandling.
I obtain these objects by the mechanism illustrated in the accompanying drawings in which- Fig. 1 shows a side elevation of my mechanism in prospective; Fig. 2 shows a plan view of my mechanism; Fig. 3 shows a sec tion plan view on the lines 3-3 of Fig. 1; Fig. 4 shows a sectional view on the lines 44 of Fig. 1; Fig. 5 shows a sectional view of a rotating ball valve and air nozzle pipe connections, etc; Fig. 6 shows a side view of the revolving ball valve; Figs. 7 and 8 are detail views of the powder distributing nozzle and its pipe connections.
Similar letters and numerals refer to similar parts throughout the several views.
My mechanism is mounted on the frame, A, which may be secured to the floor by any of the usual means. The rollers, 1, and 2, are mounted on the frame A. The roller, 1, mav be operated by the pulley, 3, driven by a belt, 4, from a pulley, 5, on the motor, 6. The meshed belt carrier, 7, which is preferably of wire mesh, stretches between the two rollers 1. and 2, and is operated by the roller 1; it is preferably substantially the same width as the rollers, 1, and 2. This meshed belt carrier receives the wet printed matter to be powdered at 3, and this matter is carried tln'ough the machine on this meshed belt carrier. Above the meshed belt carrier is the cover B which encloses the meshed belt carrier and the top of the frame A. It is provided with a door, 9, at the receiving end and by the door, 10, at the rear end,=for the purpose of access to the operating parts and for the admission and emission of the printed matter. At or near the bottom of the frame, A, I provide the supporting shelf, 11, on which is secured the motor, 12, and the blower, 13. The blower, 13, is provided with the air supply reservoir pipe, 14, from 1926. Serial No. 113,633.
which compressed. air from the blower is distributed through the pipes, 1.5, 16, and 17.
Below the meshed belt carrier, 7, and se cured to the frame, A, I provide the powder collecting and supply receptacle, C, which is preferably of the form shown in Figs. 1 and 4. Within this receptacle C, I secure the angle-shaped distributor, 18, and beneath the distributor, 18, I provide the screen, 19, which is preferably of fine woven fabric, as bolting cloth, metal, or similar fabric. This screen preferably covers the bottom of this distributor, 18, as shown in Figs. 1 and 4. The powder supply receptacle, C, is provided with the door, 20, for the purpose of supplying powder to the receptacle, C, and as a means of access to its interior.
The blower, 13, which is operated by the motor, 12, is provided with the outlet, 14, which is preferably considerably larger in diameter than the connecting pipes, 15, 16 and 17, in order that it may contain and furnish a reserve supply of compressed air. The outlet pressure of this compressed air in the pipes 15, 16, and 17 is controlled by the valves 21, 22, and 23.
The distributingpowder pipe, 15, is supplied with a distributing nozzle, 24, shown in Fig. 7, (front view) and Fig. 1 (end view) this nozzle distributes the powder over the wet printed matter as it passes beneath this nozzle, carried thereunder by the meshed belt carrier, 7. The discharge end of this distributing nozzle preferably points slightly toward the rear end of the machine, as shown in Fig. 1.
The pipe 16 leads to the blow-off nozzle, 25, and is connected. therewith at 26; this nozzle, 25, is shown in Fig. 4 (front view) and in Fig. 1 (end view), and the air cur rent from this nozzle blows oil the surplus powder from the printed matter after it has passed under the nozzle, 24, and before the printed matter leaves the machine. The discharge end of this blow-off nozzle preferably points slightly toward the front end of the machine as shown in Fig. 1.
A baking oven, 27, is secured to the frame. A, as shown in Fig. 1, and the pi e, 17, with its controlling valve, 23, may e used to supply a current of compressed air to cool the sheets as they pass from the baking oven, 27.
The pipe, 28, the intake pipe of the blower, 1173. The blower intake creates a partial vacuum under the powder distributor, 18, and above the screen, 1.), and separates the exc air from the powder, leaving the powder substantially free from excess air and; in a normal condition; The screen, if), suflices it it merely covers the intake of the pipe, 28. An end view of the; angle-shared" powder distributor, 18, showing the pipe connections leading from (it to"the blower, shown in Fig. at (end view) and in Fig. 1 (side e,le\ 'atioii').- a
In the bottom of the powder collecting and aup ily rccoptaclerc, 1 provide the revolviug; valve, :29, a view of ,which (in section)" is shown" in Fig. '5, and (in plan) in Fig. (i. This revolving valve controls the powder 7 supply to the powder distributing"pipe, 1.5, and is operatedby ahelt itrom pulley, 30, on the rolle'i, 2. The pulley, 30, and. the pulley onthe revolving valve, 29, are referably cone or step pulleys, which permit a speedcontrol' ot the revolving valve, 29, This revolving valve, 29, in turn controls the powder SI'IPPlTytO the powder distributing pipe, The connectingconstruction between the air reserve supply pipe, 14, and the powder distributing pipe, 15, and the construction to control the amount of'the powder sluiiply to the powder distributing'pipe,1.5, is shown in 5 (in section) and in Fig. (in elevation). The air pressure to the nozzle, 31, is controlled by the valve, 21. The spring, 37, may be provided to' agitate the powder above the ri-ivolving valve, 29.
The method of operation: of'niy device is as follows A supply of the powdeifito be distributed upon the wet printed matter is placed in the powder supply receptacle, C. The wet printed matter tobe powdered is placed or-ino ve'd' upon'the meshed b elt carrier, 7, which carrio's the wet printed matter under the powder distributingnozzle, 24, and froni this nozzle the :)ow(;ler isklistributod over the printedmatterl Powder from the powder supply receptacle, C, is supplied to the powder distributing pipe, 15," through the revolving" valve, 29, and is conveyed through the powder distributiug pipe, 15,-to the powder distributing nt'izz le, by the com press'odair pressure ti'oiu'the blower, 1.3, and the reserve air-reservoir pi pe, '14-.
The meshed'belt carrier, 7, carries the wet printed matter toward the rear endbtthe machine where it passes under the blow-oil nozzle, 25, air ptrom which blows the surplus powder from the printed 'ma'tter, the surplus powder dropping upon the powder distributor, 18,- and then into the supply recep table, 0.
After the p'rintedin'i'itter passes-under" the nozzle, E li-and the nGzzleyQS ,"it continues to be carried to the rear end of the machine I 1,} ye n esheiil h'ei't cari! er, 7, until it passes to increase sl ightly thcd ianieter o t the u per'end ot the powder d isti'ibuting pipe, 15 preferably beginning at the tin-n, 33,:1nd continuing the increase in size until the pipe enters tho nozzle at 341-; 1 havealsofo'und it preferable toplace a horizon-tally located partition, 35, in the uppcrend'o'f the powder distributing pipe, 15. This partition, 35,- prevents clogging of the powder, :)art ially separates the powder-from the air, the pow- 24 above the partition, 35; and the airpass- :br the mostpaii't, below the piirtition, 35. hen-the powder .reaches the nozzle, 24-, it meets the air current which passes into the nozzle, 24, under the partition, 35, and this aircu'rrent tiu'ther a. and distributing it throughout the nozzle,
24, from which it'p'asses to the wet printed sheets tln-"oughthe outlet, 36, of the powder distributingnozzlo,24$
It is obvious that the blower, 13,- and the several pulleys may be operated by other means and their speed'regulated other than the means'shown', and tliat the parts of my machine may be otherwiserelatively located, without departing from my invc.n
tion. For example, I have found it conven ient to connect the motor, 6, by a belt'to the pulley, 32, on the baking oven, (orto pulley, 3), and operating the roller, 1, by aflbeltfrom a pulley on the same shaft as that to which the pulley, 32, is secured.
Other modificationsmay also be made without departing from my invention.
I, claim I 1. A powder distributing mechanism of the character described, consisting of a meshed belt'carrier and means for operating same,- a powder distributing nozzle extending across saichcar'rier, a powder supply-reservoir, means for supplyingcompre'ssed air as an operatingineans for conveying powder from said powder supply reservoir to said powder distributing nozzle and for removingthe surplus powder from the printed matter, means for regulating and controlling the" quantity of powder to be distributed from said powdersupply receptacle to said powdr distributing nozzle consisting of a revolving-bucketvalve installed between said powder supply; reservoirand said powder, supplydistributing page:
der, 'lor the most part, passing-t0 the nozzle;
in propellingthe character described, consisting of a meshed belt. carrier and means for operating same, a powder distributing nozzle extending across said carrier, a powder supply reservoir, means for supplying compressed air as an operating means for conveying powder from the powder supply reservoir to the powder distributing nozzle and for removing the surplus powder from the printed matter, means for regulating and controlling the quantity of powder to be distributed :trom the powder supply reservoir to the po *der distributing nozzle consisting of a revolving bucket valve, and means for increasing the aeration of the powder in the powder distributing nozzle consisting of a horizontally divided pipe connecting the powder supply distributing pipe and the powder distributing nozzle.
A powder distributing mechanism of the character described, consisting of a meshed belt carrier and. means for operating same, a powder distributing nozzle extending across said. carrier, a powder supply reservoir, means for supplying compressed air as an operating means for conveying powder from the powder supply reservoir to the powder distributing nozzle and for removing surplus powder from the printed matter, means for regulating and controlling the quantity of powder to be distributed from the powder supply reservoir to the powder distributing nozzle, consisting of a revolving bucket valve, means for agitating the powder in the supply reservoir consisting of spaced springy prongs secured at one end within the supply reservoir above the revolving valve, with their free ends normally sprung against the top of the buckets of the revolving valve, and moved up and down when the valve revolves.
l. A powder distributing mechanism of the character described, consisting of a meshed belt carrier and means for operating same a powder distributing nozzle extend ing across said carrier, a powder supply reservoir, means tor supplying compressed'air as an operating means :t'or conveying powder from said powder supply reservoir to said powder distributingnozzle and for removing the surplus powder from the printed matter and conveying said si'irplus powder to said powder supply reservoir, me: us for regulating and predetcrmining the quantity of powder to be distributed from said pow der supply reservoir to said powder distribnting nozzle consisting of a revolving bucket valve installed between said powder supply reservoir and said powder supply distributing pipe, and means for regulating the speed of said revolving valve consisting oi cone pulleys installed upon the driving and driven shaft of said revolving valve and a driving belt connecting said cone pulleys.
LOUIS \VILSON.
US113633A 1926-06-04 1926-06-04 Powder-distributing machine Expired - Lifetime US1659179A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645529A (en) * 1951-01-02 1953-07-14 Alexander F Szymborski Measuring device for spray applicators in prevention of offset and the like
US2681637A (en) * 1950-12-04 1954-06-22 Masonite Corp Coating apparatus for applying a resin in particulate form
US2703551A (en) * 1951-08-22 1955-03-08 William T Daniels Anti-offset powder distributor and collector
US2758564A (en) * 1951-05-15 1956-08-14 Ralph B Randall Apparatus for coating with dry dust
US2768903A (en) * 1953-06-18 1956-10-30 Otto W Schick Method and apparatus for applying flocking to an article
US2770212A (en) * 1952-03-26 1956-11-13 Columbia Cable & Electric Corp Continuous flow spraying system
US2779306A (en) * 1955-03-25 1957-01-29 Ibm Electroscopic toner metering device
US2848353A (en) * 1954-10-21 1958-08-19 Edward O Norris Method and apparatus for spraying articles including separation and recirculation of coating material
US2876737A (en) * 1953-10-12 1959-03-10 Battelle Development Corp Apparatus for developing electrostatic images on sheet material
US2889805A (en) * 1955-01-21 1959-06-09 Goodrich Co B F Electrostatic flocking apparatus
US3014451A (en) * 1960-05-09 1961-12-26 Herbert C Rhodes Device for depositing material in particle form on bakery products and the like
US4635585A (en) * 1985-10-15 1987-01-13 Nordson Corporation System for spray coating substrates
WO1997049559A1 (en) * 1996-06-24 1997-12-31 Heidelberger Druckmaschinen Aktiengesellschaft Method of powdering a printed surface of a printed material

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681637A (en) * 1950-12-04 1954-06-22 Masonite Corp Coating apparatus for applying a resin in particulate form
US2645529A (en) * 1951-01-02 1953-07-14 Alexander F Szymborski Measuring device for spray applicators in prevention of offset and the like
US2758564A (en) * 1951-05-15 1956-08-14 Ralph B Randall Apparatus for coating with dry dust
US2703551A (en) * 1951-08-22 1955-03-08 William T Daniels Anti-offset powder distributor and collector
US2770212A (en) * 1952-03-26 1956-11-13 Columbia Cable & Electric Corp Continuous flow spraying system
US2768903A (en) * 1953-06-18 1956-10-30 Otto W Schick Method and apparatus for applying flocking to an article
US2876737A (en) * 1953-10-12 1959-03-10 Battelle Development Corp Apparatus for developing electrostatic images on sheet material
US2848353A (en) * 1954-10-21 1958-08-19 Edward O Norris Method and apparatus for spraying articles including separation and recirculation of coating material
US2889805A (en) * 1955-01-21 1959-06-09 Goodrich Co B F Electrostatic flocking apparatus
US2779306A (en) * 1955-03-25 1957-01-29 Ibm Electroscopic toner metering device
US3014451A (en) * 1960-05-09 1961-12-26 Herbert C Rhodes Device for depositing material in particle form on bakery products and the like
US4635585A (en) * 1985-10-15 1987-01-13 Nordson Corporation System for spray coating substrates
WO1997049559A1 (en) * 1996-06-24 1997-12-31 Heidelberger Druckmaschinen Aktiengesellschaft Method of powdering a printed surface of a printed material

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