Spray nozzle and method for dusting freshly printed products
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B41F-035/00
B41L-041/00
B05B-007/00
B05C-019/00
출원번호
UP-0234103
(2005-09-26)
등록번호
US-7607391
(2009-11-10)
우선권정보
DE-10 2004 057 478(2004-11-19)
발명자
/ 주소
Haas, Rainer
Martin, Nicolas
Ehrhard, Jürgen
Berlingen, Detlev
Haas, Claudius
출원인 / 주소
Weitmann & Konrad GmbH & Co. KG
대리인 / 주소
Vincent, Paul
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
The invention concerns a spray nozzle for a powder duster for dusting freshly printed products with a connection for a tube for supplying a powder-air mixture, a distribution chamber and at least two nozzle channels which branch off from the distribution chamber like a fan, wherein the opening angle
The invention concerns a spray nozzle for a powder duster for dusting freshly printed products with a connection for a tube for supplying a powder-air mixture, a distribution chamber and at least two nozzle channels which branch off from the distribution chamber like a fan, wherein the opening angle of the outer nozzle channels limiting the fan subtends an angular range of 5° to 20°, in particular an angular range of 8° to 15°, and preferably 12°. The invention also concerns a spray bar with spray nozzles of this type, a powder duster comprising spray nozzles of this type, and a method for dusting freshly printed products.
대표청구항▼
We claim: 1. A powder duster spray nozzle system for dusting a freshly printed product via connection to a tube supplying a powder-air mixture, the printed product being transported beneath the spray nozzle system in a transport direction, the spray nozzle system comprising: a spray nozzle, said sp
We claim: 1. A powder duster spray nozzle system for dusting a freshly printed product via connection to a tube supplying a powder-air mixture, the printed product being transported beneath the spray nozzle system in a transport direction, the spray nozzle system comprising: a spray nozzle, said spray nozzle having means defining a distribution chamber and at least two nozzle channels which fan-off from said distribution chamber, wherein, transverse to the transport direction of the product, an opening angle α between outer-most nozzle channels is between 8° and 15° and, in the transport direction of the product, each nozzle channel has an opening angle of 0° and a length which is four to eight times a diameter of its largest cross sectional dimension, thereby producing a line-shaped powder curtain of small width; means for connecting said spray nozzle to the tube; and means for holding said spray nozzle at a defined separation from the product, wherein said defined separation is selected and each nozzle channel is structured and dimensioned such that jets of powder and air emanating from adjacent channels slightly contact each other but do not overlap when they impinge on the product. 2. The spray nozzle system of claim 1, wherein at least one nozzle channel extends orthogonally to the printed product to be dusted. 3. The nozzle system of claim 1, wherein said nozzle channels are disposed symmetrically with respect to a vertical. 4. The spray nozzle system of claim 1, wherein said nozzle channels have a circular cross section. 5. The spray nozzle system of claim 1, wherein said nozzle channels have a non-circular cross section. 6. The spray nozzle system of claim 5, wherein said cross section is rectangular or oval, with a larger dimension extending transversely to a transport direction of the printed product. 7. The spray nozzle system of claim 1, wherein a length of said nozzle channel is five to six times a diameter of its largest cross sectional dimension. 8. The spray nozzle system of claim 1, wherein a cross section of said distribution chamber is bell-shaped. 9. The spray nozzle system of claim 8, wherein said nozzle channels branch-off from an open side of said bell-shape. 10. The spray nozzle system of claim 1, wherein a transition between said connecting means and said distribution chamber is bevelled. 11. The spray nozzle system of claim 1, wherein a limiting wall of said distribution chamber opposite said connecting means is inclined in such a manner that the powder-air mixture is deflected in a direction towards said nozzle channels. 12. The spray nozzle system of claim 1, wherein said distribution chamber and said nozzle channels are provided in a nozzle plate. 13. The spray nozzle system of claim 12, wherein a connecting piece forming said connecting means can be screwed to said nozzle plate. 14. The spray nozzle system of claim 13, wherein said connecting piece comprises a thread for a screw cap. 15. The spray nozzle system of claim 1, further comprising spray bar having a width of approximately 1 m and at least sixteen receptacles, each receptacle cooperating with one said spray nozzle. 16. The soray nozzle system of claim 1, further comprising a powder duster cooperating with said spray nozzle, said oowder duster structured and dimensioned for use in a printing machine. 17. A method for dusting a freshly printed product using a powder-air mixture blown out from at least one spray nozzle, the printed product being transported beneath the spray nozzle in a transport direction, wherein, transverse to the transport direction of the product, powder-air mixture jets exiting the spray nozzles are blown onto the printed product at a steep opening angle between outermost nozzle channels of 8° to 15°, each nozzle channel being structured and dimensioned and a separation between the nozzle and the product being adjusted such that jets of powder and air emanating from adjacent channels slightly contact each other but do not overlap when they impinge on the product, wherein, in the transport direction of the product, each nozzle channel has an opening angle of 0° with a length of the nozzle channel being four to eight times a diameter of its largest cross section, thereby producing a line-shaped powder curtain of small width. 18. The method of claim 17, wherein jets of the powder-air mixture are strongly deflected on a surface of the printed product. 19. The method of claim 17, wherein transport air and powder particles are separated on a surface of the printed product. 20. The method of claim 17, wherein the powder-air mixture has a high momentum.
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이 특허에 인용된 특허 (4)
Reiner Haas DE; Gunther Hess DE, Device and method for dusting smooth or sheet-like products.
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