Process and device for positioning handles or rigidifying elemen

Package making – Methods – Forming a cover adjunct or application of a cover adjunct to...

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Details

53415, 53450, 383 7, 383119, B65B 6114

Patent

active

046336494

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a process for the manufacture of a sachet, made from a flexible synthetic material and containing a liquid, the sachet being provided with means of holding and regidifying, and being obtained from a pillow pack filled with liquid, the said pillow pack itself being produced continuously from a sleeve of synthetic film wound on a vertical mandrel. The invention further relates to a device for producing such a sachet as well as to the sachets obtained in accordance with this process.
Sachets obtained by processes with essentially vertical travel are well known per se. They amount, for the greater part, to producing, at a given instant of the process, a simple pillow pack which is sealed by three side welds and is filled with liquid. The problem which arises is to give this pillow pack a shape and stability such as to permit the pillow pack to be gripped and used, in particular for pouring out its contents.
The devices proposed hitherto, for the greater part, resort to specific and complex welds and cut-outs of the lower part of the intermediate pillow pack intended to be converted to a sachet.
The need thus arises for sachets obtained by a vertical-travel process, which sachets can be provided with efficient and inexpensive means of gripping and rigidification.
According to the invention, this result is achieved by a process for the production of a sachet, made from a flexible synthetic material and containing a liquid, the sachet being provided with means of holding and rigidifying, and being obtained from a pillow pack filled with liquid, the said pillow pack itself being produced continuously from a sleeve of synthetic film wound on a vertical mandrel, characterised in that the said means of gripping and rigidification essentially consists of a rigid or semi-rigid handle attached to the sleeve while the latter is on the mandrel of the forming machine.
According to an advantageous embodiment of the invention, the handle can be in the form of a rigid strip having a variety of possible cross-sections. The strip is attached continuously to the sleeve while the latter is on the forming mandrel of a vertical machine. Machines of this type are described, for example, in French Pat. No. 2,071,075. They will not be described in more detail here.
The process of the invention can be operated either starting from a magazine for preparing and storing ready-to-use handles or by employing a device which is integrated with the packaging machine and feeds the handles from a reel, the handles being successively formed and cut off. These various processes will be explained below.
According to another embodiment of the process of the invention, the handles or rigidifying elements are taken by suction from a feed magazine by means of a rotating arm comprising a suction cup and means of welding, and the said rotating arm, after rotation, applies the said handle or rigidifying element to the tubular sleeve located on the mandrel, the handle or rigidifying element being attached to the said sleeve by welding means.
The invention also relates to a device for carrying out this process. According to an advantageous embodiment, it is provided that each handle or rigidifying element, made for example from cardboard, is combined, at the feed magazine, with a sheet of synthetic material perforated with one or more holes, allowing the rotating arm to apply suction to, and pick up, the handle and its associated sheet simultaneously, the handle subsequently being fixed to the sleeve by means of the said sheet.
It does not go outside the scope of this embodiment to provide that the handle or rigidifying element is ab initio made directly weldable onto the sleeve.
The invention will be better understood with the help of the description which follows and which is given with reference to the attached drawings, given by way of a non-limiting example, in which drawings:
FIG. 1 is a perspective view of a pillow pack equipped with a handle and conforming to the invention,
FIGS. 2a, 2b, 2c, 2d, 2e, 2f and 2g are sec

REFERENCES:
patent: 2103386 (1937-12-01), Salfisberg
patent: 2259866 (1941-10-01), Stokes
patent: 2260064 (1941-10-01), Stokes
patent: 2815898 (1957-12-01), Thompson
patent: 3894381 (1975-07-01), Christine
patent: 4055032 (1977-10-01), Hammond

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