(19)
(11) EP 0 400 704 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.10.1991 Bulletin 1991/41

(43) Date of publication A2:
05.12.1990 Bulletin 1990/49

(21) Application number: 90201228.5

(22) Date of filing: 15.05.1990
(51) International Patent Classification (IPC)5: B28B 3/02, B28B 7/34
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 30.05.1989 IT 4684389

(71) Applicant: MASS S.p.A.
I-42012 Scandiano (Reggio Emilia) (IT)

(72) Inventor:
  • Bardelli, Lodovico
    I-42019 Chiozza Di Scandiano (Emilia) (IT)

(74) Representative: Corradini, Corrado et al
Studio Ing. C. CORRADINI & C. S.r.l. 4, Via Dante Alighieri
42100 Reggio Emilia
42100 Reggio Emilia (IT)


(56) References cited: : 
   
       


    (54) Method for forming uniformly compacted ceramic tiles and means for its implementation


    (57) A method for moulding uniformly compacted tiles comprises forming a test tile (11), measuring the hardness or compactness of said test tile at a large number of points on its surface, locally varying the thickness of the punch (1) for forming the reverse face of the tile in those regions of the punch corresponding to those tile hardness values which most differ from the mean value of the largest number of measurements of approximately equal value.
    Said three operations, namely forming, measuring and varying, are then repeated until a substantially uniformly compacted tile (111) is obtained, after which other tiles (111) are continuously moulded until the pressing conditions change.







    Search report