초록 ▼

A process for making an internally-reinforced bag assembly includes formation of an outer bag body with a plurality of longitudinally oriented, laterally spaced pleats or tucks therein. An inner reinforcement layer is applied to the outer bag body after formation of the pleats, whereby the inner lay

A process for making an internally-reinforced bag assembly includes formation of an outer bag body with a plurality of longitudinally oriented, laterally spaced pleats or tucks therein. An inner reinforcement layer is applied to the outer bag body after formation of the pleats, whereby the inner layer spans and overlaps each of the pleats. An apparatus embodying the present invention effects bag formation in this fashion. Advancement through the forming apparatus effects formation of the outer web into a gusseted tube, and formation of a square bottom seal. The completed bag assembly includes the inner reinforcement layer, which is dimensioned to define a circumference which is less than a circumference defined by the bag body. The resultant bag assembly resists bulging and deformation under the influence of particulate, granular, or other flowable products packaged therein.

대표청구항 ▼

[ What is claimed is:] [1.] A process of making an internally-reinforced bag assembly, comprising the steps of:providing a first web of bag-making material for formation of a bag body of said bag assembly;providing a second web of bag making material for formation of an inner reinforcement layer of

[ What is claimed is:] [1.] A process of making an internally-reinforced bag assembly, comprising the steps of:providing a first web of bag-making material for formation of a bag body of said bag assembly;providing a second web of bag making material for formation of an inner reinforcement layer of said bag assembly;forming at least one longitudinally oriented pleat in said first web of material;applying a portion of said second web of material to said first web of material so that said second web spans said pleat in said first web of material;joining opposite, longitudinal edges of said first web to each other to form a tube, wherein said portion of said second web is positioned on the inside of said tube;forming a seal across said tube to form one end of said bag assembly; andcutting said tube to separate said bag assembly therefrom, with said portion of said second web providing internal reinforcement of the bag body formed from said first web of material.