US 6,883,295 B1Granted

Process and plant for manufacturing double-pouch containers

AssigneeSarong S.p.A.

InventorsLuigi Negri, Walter Pinotti, Roberto Tabaroni

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Abstract

In the process and plant for forming double-pouch containers, two continuous external ribbons (3), facing one another, are fed in an advancement direction to an infeeding zone where a third, central ribbon (5) is inserted between the external ribbons (3). The pouches are formed by injecting a forming fluid between the external ribbons (3) in order to determine an expansion thereof against compartments of two half-molds having a shape which corresponds to a final pouch shape. Each container has two similar pouches, one facing another, which are defined by a pair of external walls and by a central wall coupled along a perimeter thereof to the external walls. The process enables rapid and economical formation of double-pouch containers.

Claims18

Dependent claims

A process comprising the following steps:

advancing two continuous external webs, facing one another, in an advancement direction, to at least one insertion zone where a third, continuous central web is inserted between said external webs;
forming pouches from said external webs and said central web, after inserting of said central web, by introducing, at a forming station, said external webs and said central web between half-mould compartments, having a shape corresponding to a final shape of said pouches, and injecting a forming fluid between said external webs and said central web through an opening so as to expand said external webs against said compartments;
welding said central web to said external webs along a peripheral zone of said pouches and along an outline of each pouch so as that said opening remains;
filling each pouch with a product through said opening at a filling station;
and
sealing each pouch by closing said opening.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/979,950Filed 5 May 2000
Priority: IT MO99A00012028 May 1999
Granted: 26 Apr 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

B65B 9/042
One or both webs being formed with pockets for the reception of the articles, or of the quantities of material: for fluent material
B29C 51/267
Auxiliary operations after the thermoforming operation: two sheets being thermoformed in separate mould parts and joined together while still in…
B65B 3/022
Machines characterised by the incorporation of means for making the containers or receptacles: making containers by moulding of a thermoplastic…
B65B 9/08
Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or…:…