(19)
(11) EP 1 839 845 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
19.12.2007 Bulletin 2007/51

(43) Date of publication:
03.10.2007 Bulletin 2007/40

(21) Application number: 07104905.0

(22) Date of filing: 26.03.2007
(51) International Patent Classification (IPC): 
B31B 1/90(2006.01)
B65D 85/10(2006.01)
 B65D 75/66(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 29.03.2006 IT BO20060214

(71) Applicant: G.D S.p.A.
40133 Bologna (IT)

(72) Inventors:
  • Boriani, Silvano
    40133, Bologna (IT)
  • Negrini, Stefano
    40012, Calderara di Reno (Bologna) (IT)

(74) Representative: Ghioni, Carlo Raoul Maria 
Bugnion S.p.A. Via Goito, 18
40126 Bologna
40126 Bologna (IT)

   


(54) A method of producing overwrap material, and a pack furnished with the material produced


(57) Transparent outer wrappers for cigarette packets are prepared by advancing a continuous strip of overwrap material (1) along a given feed path (P) in a given direction (A), piercing a predetermined area (2) of the strip with a series of slits (4) spaced apart one from another and extending nominally transverse to the feed direction (A), and bonding a narrow ribbon (7) to the strip (1) along the predetermined area (2), aligned on at least one portion (4a) of the slits (4); the strip then passes under a blade (12) shaped so as to cut a series of "U" notches (10) spaced apart one from the next, each creating a pull tab (11) at the end of the ribbon (7), before being divided ultimately into leaves (13) by a pair of contrarotating cutter rollers (14) equipped with respective blades (14a). Each single leaf (13) serves as a wrapper (16) for a relative pack, fashioned so that when torn open by pulling the ribbon (7), the ribbon encounters the slit (4) and initiates two break lines (17) extending away from the ribbon (7) on either side to facilitate the removal of the wrapper (16) in its entirety.