A laminated packaging material and a method and apparatus for production

摘要

The invention includes a method of producing a laminated sheet of flexible packaging material for forming a package by heat bonding of the laminated sheet to another packaging component. The method includes: providing a first sheet of a flexible material and a second sheet of a flexible material; removing a strip from the second sheet to form a gap in the second sheet; replacing the removed strip with a replacement strip of a flexible material; and bonding the second sheet and the replacement strip to a surface of the first sheet to form the laminated sheet of flexible packaging material. The materials forming the second sheet and the replacement strip are such that with the application of a predetermined temperature the second sheet and not the replacement strip heat bonds with the another packaging component whereby the non-heat bonded replacement strip provides a vent from the package. The invention may also include an apparatus for use with the method. 30 Fig 3 Fig 4