Method and apparatus for removing waste windows from web carton material

(19)

(11)

EP 0 878 277 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.11.1999 Bulletin 1999/44

(43)	Date of publication A2:
	18.11.1998 Bulletin 1998/47

(21)	Application number: 98303745.8

(22)	Date of filing: 13.05.1998

(51)	International Patent Classification (IPC)⁶: B26D 7/18

(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:

16.05.1997 CA 2205622

(71)	Applicant: Prittie, Allan R.
	Islington Ontario M9A 3Z9 (CA)

(72)	Inventor:
	Prittie, Allan R. Islington Ontario M9A 3Z9 (CA)

(74)	Representative: Hamilton, Alistair et al
	Mewburn Ellis, York House, 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)

(54)	Method and apparatus for removing waste windows from web carton material

(57) A method and apparatus are provided for removing waste die-cut windows from continuously moving carton board web material. A paid of juxtaposed parallel cylinders (12, 16) with their axes disposed transverse to the direction of web movement accept the moving web and knock-out the die-cut windows by virtue of a protuberance (20) on one cylinder mating with a recess (22) on the other, the protuberances and recesses matching each other and also matching the position of the die-cut window. In a variant, the non-male cylinder has an outer layer of substantially uniform thickness and is made of resilient polymeric material adapted to be elastically distorted sufficiently to receive the outward protrusion along with the waste window.

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