Method and system for application of aggregate coatings

(19)

(11)

EP 0 879 648 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.04.1999 Bulletin 1999/15

(43)	Date of publication A2:
	25.11.1998 Bulletin 1998/48

(21)	Application number: 98304017.1

(22)	Date of filing: 20.05.1998

(51)	International Patent Classification (IPC)⁶: B05D 1/34, B05D 1/02, B05B 7/14

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

20.05.1997 US 859238

(71)	Applicant: USBI, CO.
	Huntsville, AL 35807 (US)

(72)	Inventors:
	Scarpa, Jack G. Huntsville, Alabama 35802 (US) Hall, Terry L. Huntsville, Alamba 35816 (US) Hamlin, Kyle R. Huntsville, Alabama 35801 (US) Cosby, Steven A. Rogersville, Alabama 35652 (US) Howard, Tony W. Hunstville, Alabama 35816 (US) Burgess, Fletcher J. Huntsville, Alabama 35806 (US) Marlin, John D., IV Athens, Alabama 35611 (US)

(74)	Representative: Leckey, David Herbert
	Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)

(54)	Method and system for application of aggregate coatings

(57) In a method of applying an aggregate coating to a substrate (34), aggregate particles (30) are released from a supply (26) which moves relative to the substrate. The particles free-fall towards the substrate, and are at least partially coated by liquid binder material (32) sprayed from a nozzle (54). The nozzle is also arranged to spray the portion of the substrate where the particles land. A further layer of binder can be sprayed onto the particles after they land, and a further layer of particles can be deposited on the first layer.
The invention also extends to a system for carrying out the method, comprising an apparatus having a hopper (26) with release means for holding and releasing the particles (30), spray means (54) for spraying the liquid binder material (32) onto the particles (30) and the substrate (34), and supply means for supplying the liquid binder material (32) to the spray means (54), and also comprising means for moving the apparatus relative to the substrate.

Search report