초록 ▼

A handle web (14) is heat sealed to the gusset end of a bag web (10). The bag is a bottom filled top gusset bag which assumes a carton shape when filled. The handle web (14) has a central portion which extends over the gusset (18). Substantially D-shaped hand openings (16, 18) are formed in the hand

A handle web (14) is heat sealed to the gusset end of a bag web (10). The bag is a bottom filled top gusset bag which assumes a carton shape when filled. The handle web (14) has a central portion which extends over the gusset (18). Substantially D-shaped hand openings (16, 18) are formed in the handle web (14). These openings (16, 18) have inwardly-directed arcuate sides (60, 62) and substantially flat outwardly-directed sides (64, 66). Rounded corners (68, 70, 72, 74) are formed where the arcuate sides (60, 62) meet the flat sides (64, 66). This construction results in a four-sided stretching of the handle web when under load, along smoothly curving arcuate paths, providing good stress distribution in the handle web material and the elimination of tear-inducing stress concentrations.

대표청구항 ▼

A plastic bag with strap-type carrying handle, comprising: a bag web of thermoplastic material folded laterally on itself to form front and rear panels and a top gusset between the panels at one end of the bag, said panels having parallel side edges, and said top gusset having end edges colinear wit

A plastic bag with strap-type carrying handle, comprising: a bag web of thermoplastic material folded laterally on itself to form front and rear panels and a top gusset between the panels at one end of the bag, said panels having parallel side edges, and said top gusset having end edges colinear with and positioned between upper portions of the side edges of the panels when the bag is flat and unfilled; and side seals connecting the side edges of the panels together, and further connecting the end edges of the top gusset together and to the upper portions of the side edges of the panels, in a manner resulting in the bag when filled assuming a carton shape and the gusset being substantially flat and forming a closed top for the bag; and a handle web of thermoplastic material having opposite edge portions and a central portion between said edge portions, overlying the top gusset, and connecting seals connecting the edge portions of the handle web to the front and rear panels of the bag web adjacent the top gusset, said central portion including a pair of substantially D-shaped hand openings, each having an arcuate side of continuous concave curvature, a substantially flat opposite side, and rounded corners where the arcuate side meets the substantially flat side, said hand openings being arranged in the central portion of the handle web in a mirror-like symmetry, with the substantially flat sides adjacent the connecting seals and the arcuate sides directed inwardly towards each other, said handle web including an elongated strap handle region located laterally between the openings and extending longitudinally of the top gusset, and opposite end regions endwise of the strap handle region extending both endwise and laterally outwardly to regions of the edge portions of the handle web which, when the bag is filled, are located at upper side corner regions of the bag.