US 4,907,394 AGranted

Method for producing a foil-container, apparatus for the implementation of the said method, and a foil-container produced according to the said method

AssigneeUnionpack Industrielle Lohnverpackuns-GmbH & Co.

InventorsJosef Tschepke, Bernhard Oerther, Eduard Hintermaier

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Abstract

For the purpose of producing filled foil-containers adapted to stand upon their bases, container-parts having tubular parts are initially deep-drawn, in a strip of foil, on each side of centerline running in the direction of travel, the said tubular parts running towards the edges of the foil but terminating at a distance therefrom. Thereafter, the foil-parts lying on each side of the centerline are heated and are folded up about the said centerline, which thereby becomes a fold-line to form open containers which are then sealed, at a first sealing station around their peripheries, except for the perpheries of the upwardly projecting tubular parts. The edges of the foil are then spread apart in the vicinity of the said tubular parts, through which the containers are filled. The spreading is released and the containers are sealed, in a second sealing station in such a manner as to close the peripheries of the said tubular parts also. Opening-aids are then made in the vicinity of the tubular parts thus formed and the filled containers are separated individually or into groups. An apparatus of this kind consists of a supply-station with a roll of foil, a conveyor, a deep-drawing station, a heating station, a first and second sealing station and a first and second stamping station.

Claims19

Dependent claims

A method for producing foil-containers in the form of bottles filled with freely flowing substances and having bases upon which they are adapted to stand, comprising:

(a) deep-drawing at least a part of each foil-container, from a piece of flat deformable foil having a plane, having a base-part running substantially at right angles to the plane of the foil, with a neck-section remote from the base-part, and with edge-areas projecting outside the base at the periphery of the container-part;
(b) folding the foil-material about a line located substantially at an edge-like transition between a plurality of base-parts and the plane of the foil;
(c) connecting portions of foil lying on each side of the fold-line and one upon the other in edge-areas after having been folded around, from the base-parts to at least approximately upper ends of half-sections formed thereby, the foregoing steps being a first connecting process;
(d) filling each container through the upper ends of the half-sections;
(e) closing each container;
(f) during the deep-drawing process, forming, on each neck-section, a tubular part directed away from the base-part and which is directed to the nearest foil-edge and has a tubular end at a distance "A" therefrom, and which subsequently ensures a sealed connection between foil-parts lying upon another end of the tubular part and initially not connected;
(g) joining the foil-parts lying one upon the other together in an edge-area, with the exception of a filler opening, at tubular ends;
(h) filling each foil-container through the tubular part;
(i) sealing together the foil-parts lying one upon the other at a tubular end in the vicinity of the filler opening by a second connecting process and, finally,
(j) separating filled and sealed foil-containers individually or into groups.

7 more elements

An apparatus for producing deep-drawn foil-containers having bases upon which they are adapted to stand, comprising:

at least one deep-drawing tool having a flat tool-surface and having at least one mold-cavity per container, the mold-cavity comprising mold surfaces merging with each other in order to produce a base-part running at right angles to the tool-surface, a container-wall, a neck-section, and a tubular part extending therefrom, the axis of which runs in a surface of the tool determining an area of an edge of the foil-container.

Dependencies are inferred from the claim text.

Facts

Application: 07/199,938Filed 27 May 1988
Granted: 13 Mar 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

B65B 9/093
In a web folded and sealed transversely to form pockets which are subsequently filled and then closed by sealing: the web having intermittent motion
B29C 65/203
Characterised by the type of welding mirror: being several single mirrors, e.g. not mounted on the same tool
B29C 65/2061
Characterised by special ways of bringing the welding mirrors into position: by sliding
B29C 66/0342
Thermal after-treatments: cooling, e.g. transporting through welding and cooling zone