Package making – Methods – Enclosing contents within progressively formed web means
Reexamination Certificate
1998-12-18
2001-03-06
Sipos, John (Department: 3721)
Package making
Methods
Enclosing contents within progressively formed web means
C053S482000, C053S375200, C053S387100, C053S551000, C493S218000, C493S936000
Reexamination Certificate
active
06195965
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to containers and in particular to a container adapted to hold a fluid or liquid such as a beverage or the like. The present invention also relates to a method of forming fluid-filled containers from a tube of flexible material and to a method of forming a self-supporting fluid-filled container.
BACKGROUND OF THE INVENTION
In the application of which this is a continuation-in-part, the whole of which is incorporated herein by reference, there is disclosed a mechanism for forming a heat seal and a cut transversely of a tube of flexible packaging material, the mechanism including a carrier to contact the tube, heat sealing means on the carrier to form a heat seal across the tube when contact takes place, and a resistive wire on the carrier which can be energized to cut the tube when the carrier is in contact with the tube.
In the embodiments disclosed in the earlier application, the tube of flexible packaging material is severed, transversely to its direction of movement, into a plurality of identical containers each having a main body with two opposed lower pointed corners.
In the earlier application, a heat sealing and cutting apparatus downstream of the container forming apparatus is described. This apparatus includes mechanisms to collapse each pointed lower corner of the container into a flattened triangular shape and then heat the collapsed corner to weld the corner together in the flattened condition. The mechanisms incorporate resistive cutting ribbons adapted to sever the flattened triangular corners.
This continuation-in-part application is directed to a variant in terms of dealing with the opposed pointed lower corners of the container as manufactured, in which the corners are first pinched to collapse the corners into flattened triangular shapes while adding heat in order to weld the corners together in the flattened condition, this being followed by bending each flattened corner to lie under the respective main body of the container, while the flattened corner still retains heat. It is found that this step of bending the flattened corners, while they still retain heat, is sufficient for the flattened corners to remain in position in which they lie under the main body of the container.
GENERAL DESCRIPTION OF THE INVENTION
Accordingly, this invention provides a method of manufacturing a plurality of containers from a tube of flexible packaging material, the method comprising the steps:
transversely severing the tube into a plurality of individual containers each having a main body with two opposed pointed lower corners,
pinching each pointed lower corner to collapse the corner into a flattened triangular shape while adding heat to the same in order to weld the corner together in the flattened condition, and
bending each flattened corner to lie under its respective main body, while the flattened corner still retains heat.
Further, there is provided herein, in a method for the manufacture of a container possessing a main body with at least one lower pointed corner, the improvement comprising the steps:
pinching the pointed lower corner to collapse the corner into a flattened triangular shape while adding heat to the same in order to weld the corner together in the flattened condition, and
bending the flattened corner to lie under its respective main body, while the flattened corner still retains heat.
Additionally, this invention provides, in a method for the manufacture, from a tube of flexible, heat-weldable packaging material, of a plurality of containers each having a main body with two opposed lower pointed corners, the improvement comprising the steps:
pinching each pointed lower corner to collapse the corner into a flattened triangular shape while adding heat to the same in order to weld the corner together in the flattened condition, and
bending each flattened, heated corner to lie under its respective main body.
Moreover, this invention provides, for manufacturing a plurality of containers from a tube of flexible packaging material, an apparatus comprising:
severing means for transversely severing the tube into a plurality of individual containers each having a main body with two opposed pointed lower corners,
pinching means for pinching each pointed lower corner to collapse the corner into a flattened triangular shape,
heating means for heating each pointed lower corner in order to weld the corner together in a flattened condition, and
bending means for bending each flattened corner to lie under its respective main body, while the flattened corner still retains heat.
Finally, this invention provides, in an apparatus for the manufacture of a container possessing a main body with at least one lower pointed corner, the improvement comprising:
pinching means for pinching the pointed lower corner to collapse the corner into a flattened triangular shape,
heating means for adding heat to the same in order to weld the corner together in a flattened condition, and
bending means for bending the flattened corner to lie under its respective main body, while the flattened corner still retains heat.
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Arkmount Systems Inc.
Baker & Daniels
Sipos John
LandOfFree
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