초록 ▼

A cushioning conversion machine, converting method and dunnage product characterized by a novel connecting assembly which provides a unique interlock between overlapped portions of sheet-like stock material forming a dunnage product to prevent "unzippering" of the product. The connecting assembly in

A cushioning conversion machine, converting method and dunnage product characterized by a novel connecting assembly which provides a unique interlock between overlapped portions of sheet-like stock material forming a dunnage product to prevent "unzippering" of the product. The connecting assembly includes a pair of loosely meshed stitching wheels, a first one of the stitching wheels having a plurality of radial projections protruding from a radially outer circumferential surface thereof, and a second one of the stitching wheels including a plurality of recesses for receiving the radial projections in meshed relationship upon rotation of the stitching wheels. The radial projections each have a radially outer end portion forming a hook, whereby, upon rotation of the stitching wheels with the overlapped portions of the stock material passing therebetween, the radial projection will pierce through and form a perforation in the overlapped portions as it moves into the recess in the second stitching wheel and then hook and reversely pull back through the perforation at least partway a tab portion of the overlapped portions adjacent the perforation.

대표청구항 ▼

[ What is claimed is:] [1.] A cushioning product formed from sheet stock material, the product comprising lateral pillow portions and a connecting portion therebetween;the connecting portion including at least one longitudinal row of perforations;each of the perforations including a tab portion hing

[ What is claimed is:] [1.] A cushioning product formed from sheet stock material, the product comprising lateral pillow portions and a connecting portion therebetween;the connecting portion including at least one longitudinal row of perforations;each of the perforations including a tab portion hinged to a first edge section of the connecting portion surrounding the perforation;wherein the tab portion is deformed in one direction and at least a portion of a second edge section is deformed in a generally opposite direction.