Method for sizing natural- or synthetic-stone elements, particularly ceramic tiles, and machine for carrying out the method

(19)

(11)

EP 0 865 870 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	17.05.2000 Bulletin 2000/20

(43)	Date of publication A2:
	23.09.1998 Bulletin 1998/39

(21)	Application number: 98103581.9

(22)	Date of filing: 02.03.1998

(51)	International Patent Classification (IPC)⁷: B24B 7/22, B24B 9/06, B24B 47/22, B24B 49/18, B23Q 7/02

(84)	Designated Contracting States:
	AT BE CH 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:

11.03.1997 IT MO970039

(71)	Applicant: Pragma S.r.l.
	41041 Casinalbo (Modena) (IT)

(72)	Inventor:
	Santi, Gabriele 41015 Montefiorino (Modena) (IT)

(74)	Representative: Modiano, Guido, Dr.-Ing. et al
	Modiano & Associati SpA Via Meravigli, 16 20123 Milano 20123 Milano (IT)

(54)	Method for sizing natural- or synthetic-stone elements, particularly ceramic tiles, and machine for carrying out the method

(57) A method for sizing elements made of natural or synthetic stone, particularly ceramic tiles, and optionally also squaring such elements, by means of a dry abrasive tool (4) with wear compensation and single sizing of the element (5) being processed, avoiding the drawbacks of wet grinding and those linked to the complications due to size differences; the machine allows to rotate the abrasive tool (4) and to back it off axially, automatically and continuously in order to measure its wear and compensate for it at preset time intervals; application occurs particularly in ceramic factories for finishing the edges of tiles.

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