Blister pack
OwnerHans Hagnerinventor
Life of this patent
Estimating the term…
Abstract
In a blister pack for packaging an article and composed of a perforated lower plastic backing part and an upper, cut plastic cover part which at least partly surrounds and conforms closely to the article and is connected with the backing part so that the backing part and the cover part completely enclose the article, the backing part and the cover part each including at least a layer made of a single type of plastic and being heat sealed together in a defined area, the backing part and the cover part each constitute a transparent hard foil, and the backing part is provided with perforations of such a size that portions of the cover part engage in the perforations in a manner to plug the perforations in the area where the backing part and the cover part are heat sealed together.
Claims14
In a blister pack for packaging an article and comprising a perforated lower plastic backing part and an upper, cut plastic cover part which at least partly surrounds and conforms closely to the article and is connected with the backing part so that the backing part and the cover part completely enclose the article, the backing part and the cover part each including at least a layer made of a single type of plastic and being heat sealed together in a defined area, the improvement wherein:
- said backing part and said cover part each constitute a transparent hard foil, and
- said backing part is provided with perforations of such a size that portions of said cover part engage in said perforations in a manner to plug said perforations in the area where said backing part and said cover part are heat sealed together.
A blister pack in accordance with claim 21 wherein said backing part and said cover part are each constituted by a three-layer compound foil composed of a PET layer core and two exterior S-PET layers which can be heat-sealed.
A blister pack in accordance with claim 61 wherein said perforations lie on at least two groups of rows which form n-cornered partial areas, each partial area being enclosed by perforations.
Dependencies are inferred from the claim text.