Feeding calender in welding machines for plastic materials

(19)

(11)

EP 1 020 390 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	19.12.2001 Bulletin 2001/51

(43)	Date of publication A2:
	19.07.2000 Bulletin 2000/29

(21)	Application number: 99204427.1

(22)	Date of filing: 20.12.1999

(51)	International Patent Classification (IPC)⁷: B65H 20/02, B31B 19/10

(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:

12.01.1999 IT MI990031

(71)	Applicant: ELBA S.p.A.
	I-20020 Magnago (Milan) (IT)

(72)	Inventor:
	Mainini, Giorgio 20020 Vanzaghello, Milano (IT)

(74)	Representative: De Gregori, Antonella
	Ing. Barzano & Zanardo Milano S.p.A. Via Borgonuovo 10 20121 Milano 20121 Milano (IT)

(54)	Feeding calender in welding machines for plastic materials

(57) An instantaneously controlled feeding calender in welding machines for plastic materials, comprising an upper feeding cylinder (12) and a lower feeding cylinder (13) superimposed on each other and mounted on parallel axles, between which a plastic or thermoplastic film (14) is fed so as to form a bag or similar, a welding group downstream of the cylinders (12, 13) comprising an upper welding arm (15) and a lower welding arm (16), and a collecting area (18, 20, 21, 22) for finished bags (19), where each cylinder (12, 13) is equipped with an independent motor (27, 28).

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