Flexible packaging and the method of production
AssigneeBecton, Dickinson and Company
InventorsJoel L. Williams, Walter P. Miller, III
Life of this patent
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Abstract
Methods are provided for producing flexible packages and particularly transdermal medication patches. The method includes the continuous and rapid production of a plurality of such packages while continuously treating one portion of the laminate forming the package by corona discharge in order to modify the surface adhesion properties thereof to provide, simultaneously, a proper seal of a transdermal membrane in the laminate forming the package, while maintaining the desired medication dispensing properties thereof.
Claims4
A process for the controlled simultaneous forming, filling, and sealing a plurality of flexible packages containing a material with a liquid component;
- comprising
- (a) supplying in a first supplying step a first web of material for forming a first side of the flexible packages to be formed;
- (b) supplying in a second supplying step a second web of material for forming a second side of the flexible package to be formed;
- (c) utilizing a pair of heated opposed surfaces positioned in cooperating engagement for receiving and joining said first and second webs from said first and second supplying steps in a flexible package forming area;
- (d) prior to said utilizing step, depositing a plurality of spaced apart quantitites of filling material for said packages on said first web from said first supplying step;
- (e) passing said web from said utilizing step to a cutting means;
- (f) cutting said web from said passing step into a plurality of filled flexible packages;
- the improvement characterized by the steps, of
- (g) prior to said utilizing step, exposing said first web of material to the effects of corona discharge;
- (h) said first web from said first supply roll is a laminate comprised of a membrane film layer, an adhesive film over one surface of said membrane film layer, and a peelable film on the side of said adhesive opposite said membrane film;
- (i) said membrane film allowing controlled passage of the contents of the package therethrough;
- (j) said membrane film being a silicone film having a chemically modified surface by exposure to corona discharge, and
- (k) said second web is a backing layer comprised of a laminate film of polyester laminated to a sealing film of polyvinyl acetate.
Dependencies are inferred from the claim text.