Patent ID: 7074290

Claim:
A manufacturing method of a cushioning material for packaging comprising the steps of: forming a blank by forming, in a sheet of corrugated fiberboard, a plurality of parallel folding lines for partitioning the sheet of corrugated fiberboard into a plurality of unit corrugated fiberboard ( 41 â€“ 52 ) and openings for receiving an article; folding the blank ( 10 ) alternately oppositely along the folding lines in a zigzag shape; pasting joint surfaces of the unit corrugated fiberboard ( 41 â€“ 52 ) inter-coupled in the zigzag shape; and pressing and inter-joining the pasted unit corrugated fiberboard ( 41 â€“ 52 ) to form a laminated body; wherein the step of folding the blank further comprises a step of sequentially folding the blank ( 10 ) along the folding lines by a cooperation of a single crest folding plate ( 109 ) moving vertically and laterally and a single trough folding plate ( 125 ) moving laterally, the crest folding plate ( 109 ) being disposed on one side of a conveying route of the blank ( 10 ), the trough folding plate ( 125 ) being disposed on the other side of the conveying route.