Contoured seal facing for seal jaws in vertical form, fill, and seal packaging system
OwnerRodney Wayne Cooper, Garrett William Kohl +2inventors
InventorsRodney Wayne Cooper, Garrett William Kohl, Eric Eugene Meyer, Steven Kenneth Tucker
Life of this patent
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Abstract
In order to handle bag configurations having extra layers in some portions, especially where thicker materials are used, the facings of the sealing jaws are relieved in the area of the extra layers, so that even pressure is applied to the material across the entire seal area. An improved transverse seal is obtained using this method.
Claims20
A set of heat sealers for installation on a form and fill machine, said set of heat sealers comprising:
- a first seal facing surface;
- a second seal facing surface, wherein a first level of said first facing surface and a first level of said second facing surface generally fit together in a mating fashion;
- wherein a second level of said first facing surface is recessed from said first level of said first facing surface by an amount that approximately equalizes the pressure across a seal being formed.
An improvement to a form, fill, and seal machine, said improvement comprising:
- a first seal facing surface;
- a second seal facing surface, wherein a first level of said first seal facing surface and a first level of said second seal facing surface generally fit together in a mating fashion;
- wherein a second level of said first facing surface is recessed from said first level of said first facing surface by an amount that approximately equalizes the pressure across a seal being formed.
A method for manufacturing a bag with a vertical form, fill, and seal machine, said method comprising the steps of:
- forming a packaging material into a shape in which a first area to be sealed has a first number of layers of packaging material and a second area to be sealed has a second number of layers of packaging material, wherein said first number is greater than said second number;
- relieving sections of a pair of heat sealer facings which contact said first portion of an area to be sealed so that an approximately equal pressure is provided across said first and said second areas
The method of claim 19, wherein each of said pair of heat sealer facings are relieved approximately the thickness of one layer of a material with which the set of facings are designed to work.
Dependencies are inferred from the claim text.