A packing bag to store a stored article Z with tight seal by a welded sheet material 1 of resin in which a separation-prepared line portion 5, separable by predetermined tensile force F by human hands to take out the stored article Z, is provided along an opening-prepared side portion 10, the sheet material 1 has a layered unit construction in which first and second welding resin layers 61A and 61B are disposed on both sides, and a barrier layer 60 is disposed on a middle position, the separation-prepared line portion 5 is composed of a half-cut first laser-worked groove 7A concaved on the first welding resin layer 61A and a half-cut second laser-worked groove 7B concaved on the second welding resin layer 61B, and, the first and second laser-worked grooves 7A and 7B are formed barely damaging the barrier layer 60.

A reclosure, closure or zipper (40) is mounted to the top of a large format package or bag (10), which may be formed from a tube of polymeric material and comprises a first wall (12), a second wall (14), a first gusset (16) and a second gusset (18), the first and second gussets (16, 18) respectively connecting first and second side edges (20, 22) of the first and second walls. The upper corners of the package or bag include notches (24, 26) in the gussets (16, 18). The areas of the package walls around the notches are pinned, glued or sealed together and the closure is attached to the package walls (12, 14). The ends (41, 43) of the reclosure, closure or zipper are flush with the side edges or seals (20, 22) of the package or bag.

Articles having mechanically strengthened seams (320) and methods of making the same are provided. An article includes at least one material sheet (311) and a seam (320) formed from an overlap of two portions (310, 314) of the at least one material sheet (311) and an adhesive (312) deposited between the two portions (310, 314) of the at least one material sheet (311) along at least a portion of the overlap, the adhesive (312) sealing the two portions (310, 314) of the at least one material sheet (311), wherein at least one of the two portions (310, 314) of the material sheet (311) comprises a plurality of indents (322) on a surface thereof, such that the adhesive (312) penetrates the material sheet (311) at the indents (322) to provide a mechanical bond between the two portions (310, 314) of the at least one material sheet (311).

A method for making a film bag with reinforced bag seams includes a film extruder that produces a continuous tube of film. A flattener produces a continuous web of flattened film which has an upper surface and a lower surface. A fold maker has a receiving portion positioned above the web and a displacing portion is positioned below the web that moves cyclically upward to a first position to locate a portion of the web into the receiving portion, thereby forming a fold. A fold retention device prevents the fold from opening. A presser flattens the fold against the web. A sealer seals through the fold, forming a reinforced bag seam. A cutter severs a sealed portion from an unsealed portion of the web. A transport mechanism moves the film from the extruder, through the flattener, into the fold maker, beneath the presser, into the sealer and to the cutter.

The product efficiency of bags each with an end face part is increased. A panel webs is guided to be divided along a line of weakness of the panel web and to be folded along division edges of the panel web. This guiding of the first panel and temporary sealed sections cause a side gusset to be cut open along a line of weakness of the side gusset such that open surfaces are formed. After the forming of the open surfaces, an end face web is supplied to be superposed on folded parts of the panel web and the open surfaces of the side gusset.

To provide a fungus bed cultivation bag that prevents mushroom spawn film from tearing when the fungus bed is removed from the bag and can surely form the fungus bed in an appropriate shape. The fungus bed cultivation bag includes body parts opposing in the front and the back, a folding gusset part connecting to both sides of the body parts, a bottom seal part formed by heat-sealing the lower ends of the body parts and an inclined seal part formed by heat-sealing the lower end sides of the body parts and the folding gusset part in an oblique direction.

At least one of a horn or an anvil includes protrusions that protrude from a facing surface thereof. Two panel parts and a gusset part folded and interposed between the panel parts are sandwiched and compressed by the horn and the anvil. Two portions of the gusset part are welded to each other by ultrasonic vibration of the horn during the sandwiching and compressing.

A bottom and side gusseted package comprises a package body, a pair of inwardly extending side gussets, and a bottom gusset positioned transversely of a longitudinal axis of the package body. Formation of the gusseted package is effected by positioning individual sleeves transversely of the longitudinal axis of a flexible web which forms the package body. During package formation, the inwardly extending side gussets are formed, and the flexible web is cut to form individual packages, such that each individual sleeve forms a bottom gusset in a respective one of the gusseted packages.

A flexible gusset package containing a plurality of items is described. The package has a front surface having no seam; a rear surface opposite the front surface; a first surface adjacent the front and rear surfaces; a second surface having a closing seam and being opposite the first surface; an opposing pair of third and fourth surfaces respectively adjacent the first and second surfaces, the third and fourth surfaces having a first and second side seams, respectively; a pair of side gussets located in the third and fourth surfaces, respectively; and a pair of closing gussets located in the second surface, wherein the surfaces cooperatively define an interior compartment of the package, wherein the package is a laminate having a film layer facing the interior compartment and a paper layer, and wherein the second surface includes an area of the film layer where the closing seam is formed.

A bag made of flexible material has a first and a second segment having cheeks along their selvages, the cheeks being joined together so as to form two gussets joining the segments together, one end of the bag perpendicular to the selvages being closed. The bag has a system of at least one reinforcing panel extending over a central part of the segments, between the gussets, each segment having a fold marking line, one opposite the other, in order to delimit a bottom at the closed end. Method and machine for manufacturing such a bag.