Composite band for lids for thermoplastic containers
First Claim
1. Composite band with lids for thermoplastic containers having a flat and preferably horizontal upper edge or rim, said composite band being of the type comprising downward from the top:
- a first thin band in aluminum or equivalent material, a thermo-adhesive film bonded to the lower face of the first band, and a second band in thermoplastic material adhering to the first band via said thermo-adhesive film and adapted to be separated therefrom by peeling off, said second band having, in each part corresponding to the position of each lid to be subsequently cut out, at least one slit of curved configuration defining a passage and the ends of which are either located closely together or coincide, whereinthe slit is defined on both sides by faces which are very close together and perpendicular to the lower face of the second band,the first band is bonded to the second band via two thermo-adhesive films with different adhesive powers, the film with high adhesive power being provided inside the area defined by the slit, and the film with low adhesive power being provided outside that area, anda thermoplastic tightening or sealing film adheres strongly to the entire lower face of the second band, inside as well as outside the area defined by said slit.
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Accused Products
Abstract
The invention relates to a band with lids for flat-edged thermoplastic containers comprising a first band in aluminum and a second thermoplastic band adhering via a thermo-adhesive film in such a way as to make the first removable by peeling; the second band comprises a slit.
According to the present invention, the faces defining the slit are perpendicular to the second band and at a very small distance one from the other, the thermo-adhesive film has areas with two different adhesive powers, the area with the higher adhering power being located within the zone defined by the slit whereas the other area is located outside said zone, and a sealing or tightening film covers the whole underface of the second band.
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Citations
7 Claims
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1. Composite band with lids for thermoplastic containers having a flat and preferably horizontal upper edge or rim, said composite band being of the type comprising downward from the top:
- a first thin band in aluminum or equivalent material, a thermo-adhesive film bonded to the lower face of the first band, and a second band in thermoplastic material adhering to the first band via said thermo-adhesive film and adapted to be separated therefrom by peeling off, said second band having, in each part corresponding to the position of each lid to be subsequently cut out, at least one slit of curved configuration defining a passage and the ends of which are either located closely together or coincide, wherein
the slit is defined on both sides by faces which are very close together and perpendicular to the lower face of the second band, the first band is bonded to the second band via two thermo-adhesive films with different adhesive powers, the film with high adhesive power being provided inside the area defined by the slit, and the film with low adhesive power being provided outside that area, and a thermoplastic tightening or sealing film adheres strongly to the entire lower face of the second band, inside as well as outside the area defined by said slit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a first thin band in aluminum or equivalent material, a thermo-adhesive film bonded to the lower face of the first band, and a second band in thermoplastic material adhering to the first band via said thermo-adhesive film and adapted to be separated therefrom by peeling off, said second band having, in each part corresponding to the position of each lid to be subsequently cut out, at least one slit of curved configuration defining a passage and the ends of which are either located closely together or coincide, wherein
Specification