Patent ID: 7240468
Filing Date: 2007-07-10
Classification: B31D,B65B

Abstract:
1. A method of manufacturing a cushioning package containing an article to be packaged comprising: a first step of forming a cushioning sheet by heat-sealing at least two flexible elongated sheets in a width direction, the elongated sheets being continuously fed in a longitudinal direction, the flexible elongated sheets having previously been placed one on another so as to overlap each other in a width direction of the sheets, the heat-sealing of the at least two flexible elongated sheets forming the cushioning sheet to include a plurality of small sacs in a uniform shape, each small sac having a length extending from one end to another in the width direction and having an air-filling inlet portion formed on at least one longitudinal end thereof; a second step, following said first step, of forming an article storage space enveloped by the small sacs by folding the cushioning sheet substantially along a longitudinal centerline of the cushioning sheet and joining and adhering at least one longitudinal edge of the folded cushioning sheet; adhering one side of the cushioning sheet in the width direction but not adhering an opposite side of the cushioning sheet in the width direction, thus forming the article storage space defined by the longitudinal edges of the cushioning sheet and the one adhered side of the cushioning sheet; a third step of disposing an article to be packaged into the article storage space through an article storage opening that serves as an entry portion of the article storage space; a fourth step of filling air to inflate the small sacs; and a fifth step of closing the article storage opening by adhesion of the cushioning sheet in a width direction on the side opposite to the one adhered side of the cushioning sheet in order to prevent the air filled in the small sacs from leaking and to simultaneously close the article storage opening, wherein the above steps are performed in the recited order.