Thermal bag for foods and the like
AssigneeIM-BALL-CENTER S.r.L.
InventorNicola Giuliani
Life of this patent
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Abstract
The thermal bag (2) is made of thermally insulating composite material folded to form a bottom and welded along lateral borders (3) to form a body (1) of the bag with a mouth (5) at the level of which a handle (7A, 7B) is applied. The composite material defines a bottom folded in an accordion-like fashion opposite the mouth of the bag, and a laminar stiffening element (15) of the accordion-like bottom is disposed inside the bag.
Claims30
A thermal bag made of thermally insulating composite material folded to form a bottom and welded along lateral borders to form a body of the bag with a mouth at the level of which a handle is applied;
- characterized in that said composite material defines a bottom folded in an accordion-like fashion opposite the mouth of the bag, and in that a laminar stiffening element of the accordion-like bottom is disposed inside the bag
Thermal bag as claimed in one or more of the previous claims, characterized in that said composite material is composed of a first outer sheet, a second inner sheet and a thermally insulating sheet interposed between said outer sheet and said inner sheet.
Thermal bag as claimed in one or more of the previous claims, characterized in that in the folded position the accordion forming the bottom of the bag has beveled borders along which welding lines are produced, the beveled borders on each side of the bag converging in a corner, the two opposed corners being joined by a folding line of the accordion-like bottom.
Thermal bag as claimed in one or more of the previous claims, characterized in that said laminar stiffening element contains a refrigerating fluid.
Thermal bag as claimed in one or more of the previous claims, characterized in that said laminar stiffening element is made of cellular plastic.
Thermal bag as claimed in one or more of the previous claims, characterized in that said composite material has an outer sheet composed of a multilayer metallized polymer material.
Thermal bag as claimed in one or more of the previous claims, characterized in that said composite material has a thermally insulating intermediate sheet composed of a foamed polymer material.
Thermal bag as claimed in one or more of the previous claims, wherein said composite material includes an inner layer made of low density polyethylene.
Thermal bag as claimed in one or more of the previous claims, characterized in that the accordion-like bottom in the open position has a width approximately equal to half the height of the bag.
Method for producing a thermal bag as claimed in one or more of the previous claims, comprising the steps of:
- feeding a continuous composite material in a direction of feed;
- longitudinally folding said composite material, abutting the longitudinal edges with each other and forming a portion folded in an accordion-like fashion;
- welding said continuous composite material along transverse welding lines;
- cutting the web material along the transverse welding lines dividing them into individual thermal bags;
- and wherein a laminar stiffening element is inserted between the longitudinal edges, at the level of each bag to be formed, and a handle is applied at the level of the longitudinal borders.
Dependencies are inferred from the claim text.