US Patent 6915905 Packing buffer material

A packing cushion material located between a packing article and a packing box to buffer shocks applied from the outside to protect electronic appliances such as audio apparatus and speaker apparatus and other articles housed and packed in the packing box is formed by pulp mold. The packing cushion material is characterized by upper and lower cushion portions contacting with the packed article from the lower direction or the upper direction and side cushion portions contacting with the packed article from the lateral direction to receive force acting from the lateral direction, wherein the side cushion portions include protrusion portions protruding in the upper and lower directions and including contact surfaces expanded in the upper and lower directions to surface-contact the packed article and reinforcement portions formed at the rear sides of the protrusion portions and having concave and convex portions.