Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1996-05-28
1998-08-04
Lavinder, Jack W.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
B31B 184
Patent
active
057886202
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method and an apparatus for producing bags according to the claims 1 and 12, respectively, as well as to an insertion device and a pre-former for said apparatus according to claims 31 and 32.
A bag of the kind that can be produced with the present invention is e.g. described in EP-A-515 896. The bag shown there is a standing bag, the side walls of which are made from at least two foil webs, which are connected to each other in edge regions. For emptying the contents, a spout is provided, which is welded into the edge region of the bag as a tube like organ.
The production of such bags is not easy. Especially the insertion of the spout when using two or more webs for bag production offers problems. EP-A-299 562 e.g. describes a production method where the spout is inserted into the bag from a bottom side after the bag's side walls have already been partially connected. Here, the spout must cover a comparatively long way through the bag's interior and it must be guided carefully. This slows production down and makes it complicated. Furthermore, the spout cannot be mounted in an arbitrary position.
On the other hand it can be imagined to introduce the spout before connecting the side foils. In this case, certain processing steps required to prepare the receipt of the spout must be carried out on the separated foil webs. This is comparatively complicated because each foil web must be worked separately. Furthermore, it is thereafter not easy to position the individually prepared foil webs sufficiently accurately on top of each other.
Therefore, it is a object of the invention, to offer a method of production and an apparatus of the kind mentioned initially, which avoid these disadvantages as far as possible.
This object is met by the invention defined in the independent claims.
By using a foil path where the foil webs first lie on top of each other, then run separately, and then again are guided on top of each other, which seems somewhat complicated at first sight, it becomes possible to introduce the duct means comfortably and easily in the second processing area. On the other hand, all necessary preparation steps can be carried out in the first processing area simultaneously on both foil webs together.
If possible, it is thereby preferred to arrange the complete insertion device between the foil webs, such that the path from the insertion device to the foil web is short and insertion can be carried out very quickly.
During insertion the duct means is preferably positioned using a suitable positioning means and attached to one of the foil webs, such that it maintains its position.
If the foil webs are pre-cut in the first processing area, it becomes possible to arrange the duct means such that it extends outwardly over the outer edge.
If depressions are to be formed in the foil webs, they are preferably prepared by means of a preformer where pre-heated areas of the foil are subjected to pressure. It should preferably be possible to regulate pressure individually for at least part of the depressions. In this way a well-defined forming of the foil is possible even if the foil has anisotropic and inhomogeneous stretching properties.
Further embodiments, advantages and applications of the invention are given in the now following description of an inventive apparatus. Such description makes reference to the figures, wherein:
FIG. 1 is a schematic side view of the apparatus for making bags according to the present invention,
FIG. 2 is a schematic top view of the apparatus of FIG. 1,
FIG. 3 shows the formed foil webs upon leaving the apparatus of FIG. 1,
FIG. 4 is a completed bag,
FIG. 5 is a second embodiment of a completed bag,
FIG. 6 is a section through the insertion device along line VI--VI of FIG. 1,
FIG. 7 is a section along line VII--VII of FIG. 6,
FIG. 8 shows an alternative possibility for feeding the tubes to the insertion device,
FIG. 9 is a cross section through a bag with a tube with round cross section,
FIG. 10 is a cross section through the preformer,
FIG. 11 is a view of a m
REFERENCES:
patent: 4294574 (1981-10-01), Bayham
patent: 4352669 (1982-10-01), Norton
patent: 4568321 (1986-02-01), Gaubert
patent: 5273514 (1993-12-01), Kristensen
patent: 5312189 (1994-05-01), Aeschbach et al.
Cellpack AG
Lavinder Jack W.
LandOfFree
Apparatus and method for producing bags does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for producing bags, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for producing bags will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1172045