Patent ID: 11926134
Assignee: GRAPHIC INNOVATORS, LLC
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A method of manufacturing protective packaging material, comprising:
providing a first pair of web substrates that are sealed together at a first perimeter seal to define a first inner region extending in two orthogonal directions within the first perimeter seal, with a heat-expandable adhesive disposed in an amount within the first inner region sufficient to form a protective padded area when expanded;
providing a second pair of web substrates that are sealed together at a second perimeter seal to define a second inner region extending in the two orthogonal directions within the second perimeter seal, with the heat-expandable adhesive disposed in an amount within the second inner region sufficient to form a protective padded area when expanded, the first and second pairs of web substrates being overlaid on each other and merged by a seal to define an empty pocket therebetween with an opening of the pocket between edges of the seal;
simultaneously exposing the overlaid and merged first and second pairs of web substrates to RF radiation sufficiently to cause the heat-expandable adhesive to expand in the first and second inner regions to form the protective padded areas;
wherein the protective padded areas within the first and second inner regions extensively cover the pocket in the two orthogonal directions; and
processing the merged and overlaid first and second pair of web substrates after exposing to RF to provide a uniformity in thickness of the protective packaging material.