Method for wrapping products in very low contact pressure applications

A method for sealing overlapping edges of a paper wrapper about a stack of pressure sensitive material comprising the steps of overlaying a layer of low density or high density polyethylene on a flat surface of at least a margin of said paper wrapper, overlaying a layer of a primer on a flat surface of at least a margin of said paper wrapper, said primer layer being on that surface of said wrapper paper opposite the surface which carries said polyethylene, positioning said paper wrapper about said stack of pressure sensitive material with said layered margins of said paper wrapper disposed in facing relationship and with the primer layer being juxtaposed to said polyethylene layer, while maintaining said side edges so positioned, subjecting said margins to sufficient heat for a period of time sufficient to activate said primer and melt said polyethylene layer, while said primer is in its activated state and said polyethylene is molten, bringing said overlying margins of said paper wrapper together with said primer layer in contact with said polyethylene layer, and while said first and second layers are in contact with one another, urging said layers into intimate contact with one another with a pressure of a magnitude less than that which is destructive to said pressure sensitive material.