Method of filling and sealing RF-sealable packaging containers
AssigneeThe Dow Chemical Company
InventorsGerald M. Lancaster, David C. Kelley
Life of this patent
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Abstract
Packaging containers which are closed, except for a pinch-type filling valve or filling-opening, are provided with an RF-sealable polymer, at least in the valve or opening, in order to be able to seal the valve or opening using RF frequency. Preferably, polymers which are sealable using MW energy are used, including, preferably, carbon monoxide-containing ethylene polymers.
Claims15
A method for filling and sealing a container of multiwall construction, said container being closed except for a filling-opening, comprising
- introducing product into the container through the filling-opening,
- closing the filling-opening and sealing it closed by subjecting it to RF energy which is in the range of about 300 MHz to about 10,000 MHz.
- wherein the material from which the filling-opening is made contains at least one RF-sealable polymer of the group consisting of carbon monoxide-containing ethylene polymers.
A method for filling and sealing a container of multiwall construction, said container being closed except for a pinch-valve, comprising
- introducing product into the container through the pinch-valve via a filling spout,
- removing the filling spout from the pinch-valve, allowing the valve to close, and
- sealing the valve closed by subjecting the valve to RF energy above about 100 MHz,
- wherein the material from which the valve is made contains at least one RF-sealable polymer of the group consisting of carbon monoxide-containing ethylene polymers.
Dependencies are inferred from the claim text.