US 5,365,819 A · Method and process for manufacturing expandable packing material

Abstract

A process for forming a packing material, comprising positioning a paper material on or adjacent to a die member, and forcing a multitude of cutting blades completely through the paper material and .into that die member at a multitude of spaced apart locations to form a multitude of slits in the paper material. These slits allow the paper material to be pulled or expanded into a three-dimensional shape that is both load bearing and resilient. In a first embodiment, the process is carried out in a flat die press, including upper and lower die members and with the cutting blades secured to the upper die member. In a second embodiment, the process is carried out in a rotary press including upper and lower rotatable rollers and with the cutting blades secured to the upper roller.

Claims13

Dependent claims

A process for forming a packing material, comprising:

positioning a paper material on a lower die plate;
and
forcing a multitude of cutting blades completely through the paper material and into the lower die plate at a multitude of spaced apart locations to form a multitude of slits in the paper material;
wherein each of the cutting blades has a longitudinal axis and includes a multitude of notches and a multitude of cutting edges;
along the longitudinal axis of each cutting blade, the notches of the blade alternate with the cutting edges of the blade;
and the lower die plate forms a multitude of spaced apart recesses;
and
wherein the forcing step includes the step of forcing each of the cutting edges of each of the cutting blades into a respective one of the recesses in the lower die plate.

5 more elements

Dependencies are inferred from the claim text.

Method and process for manufacturing expandable packing material

Life of this patent

Method and process for manufacturing expandable packing material

Life of this patent

Abstract

Claims13