The invention relates to a method for producing a bag, in which method a bag is produced from a fiber material, preferably a paper material, wherein a web made of the fiber material, preferably a paper web, is unwound as a flat web, thereafter sequential adhesive strips are applied in continuous operation, thereafter the flat web is folded to form a bag shape, thereafter the adhesive strips are activated, for connection, by the application of heat, and thereafter individual bags are cut from the flat web by means of a cutting device.

A method and apparatus for making bags or pouches is disclosed. It includes a track, at least two sleds that move on the track, and operating stations mounted on the sleds. The film moves along the track, and the sleds move with the film while performing operations on the film. The system can have the sleds stationary while operating for an intermittent machine, and move to reconfigure when the film is moving. The operating stations include one or more of a sealer, a heater, a cooler, an inserter, a knife, a punch, a perforator, a static charger, and a printer. The track forms a continuous path or is linear. A controller controls the sleds and operating stations. The controller includes an operating time and/or a reconfiguration module. The operating time module is responsive to a user set material thickness or a sensed material thickness.

A flexible side-gusseted package and methods of making the same are disclosed. The package has a central longitudinal axis, a front panel, a back panel, and a pair of gusseted side panels. The front panel is secured to the gusseted side panels along a pair of side seal lines. The back panel is secured to the gusseted side panels along a pair of side seal lines. Each of the seal lines includes a pair of end portions and an intermediate portion. The intermediate portion, e.g., a concave recessed portion, of each side seal line is located closer to the central longitudinal axis than the end portions of the side seal lines to provide a package which is somewhat necked-down at its middle, to facilitate grasping of the package by users.

A method and apparatus for sealing a bag made of a polymeric material by applying heat activated layers on different portions of the bag, wherein the first adhesive layer and the second adhesive layer have respective heat activation temperatures below the softening point temperature of the polymeric material; after creasing the bag along a fold line, applying heat at a temperature below the softening point temperature of the polymeric material to activate the first adhesive layer and the second adhesive layer to adhesive states after the bag has been filled with contents; and folding the bag to form an adhesive-to adhesive seal by contact between the heat activated first adhesive layer and the heat activated second adhesive layer.

A woven plastic bag is made by longitudinally feeding flat-lying fabric web having a layer of woven-together plastic strips on a first face, opposite longitudinal edge regions spaced transversely from each other and each extending over about 10% of a transverse width of the fabric web, and a middle section between the longitudinal edge regions. A pattern is applied the first face of the fabric web in a pattern that repeats along the production direction only locally with a coating in the form of a film or in the form of a liquid plastic of a width or shape that varies transversely, and the fabric web is shaped into a fabric tube. In order to form individual woven plastic bags, the fabric tube is cut transversely into pieces of the fabric tube suitable for subsequent filling and sealing.

A leak proof container and a method of forming the container from a blank. The blank includes a bottom panel, first and second side panels connected to the bottom panel at opposing lateral edges, and first and second end portions located at opposing longitudinal ends of the blank. Each end portion includes an inner end panel connected to the bottom panel, an outer end panel connected to the inner end panel, and first and second corner panels forming gussets connected to a respective one of the first and second side panels and connected to the inner end panel. An adhesive area is located on one side of the blank and comprises at least a portion on each of the outer end panel and the inner end panel. The adhesive area adheres the gussets to the inner end panel and to the outer end panel.

A leak proof container and a method of forming the container from a blank. The blank includes a bottom panel, first and second side panels connected to the bottom panel at opposing lateral edges, and first and second end portions located at opposing longitudinal ends of the blank. Each end portion includes an inner end panel connected to the bottom panel, an outer end panel connected to the inner end panel, and first and second corner panels forming gussets connected to a respective one of the first and second side panels and connected to the inner end panel. An adhesive area is located on one side of the blank and comprises at least a portion on each of the outer end panel and the inner end panel. The adhesive area adheres the gussets to the inner end panel and to the outer end panel.

An envelope includes a front face receiving a closing fold and a rear face, the envelope being in a first format. The envelope includes at least one transverse fold line configured to enable the envelope to be folded on itself on its rear face so as to form at least one second format. The envelope includes at least one gluing strip on the rear face for gluing the folded envelope in the second format. A process, a use, and packaging based on such an envelope is also provided.

An envelope includes a front face receiving a closing fold and a rear face, the envelope being in a first format. The envelope includes at least one transverse fold line configured to enable the envelope to be folded on itself on its rear face so as to form at least one second format. The envelope includes at least one gluing strip on the rear face for gluing the folded envelope in the second format. A process, a use, and packaging based on such an envelope is also provided.

A process for producing bags comprising: feeding a bottom web, a first side web and a second side web in a conversion process, each of the webs having a first side edge and a second side edge, wherein the first side edge of the first side web is aligned with the first side edge of the second side web, the second side edge of the first side web is aligned with the first side edge of the bottom web, and the second side edge of the second side web is aligned with the second side edge of the bottom web, thereby forming an inverted T-shaped web comprising a base having first and second wing portions and a riser, wherein the first wing portion comprises the bottom web and first side web, the second wing portion comprises the bottom web and the second side web, and the riser comprises the first and second side webs; sewing the first side web to the bottom layer in the first wing portion with a repeating pattern comprising a truncated triangle having a narrow portion and wider portion, and a tab separating the triangles, wherein the narrow portion of the triangle points toward the second side edge of the first side web; sewing the second side web to the bottom layer in the second wing portion with a repeating pattern comprising a truncated triangle having a narrow portion and wider portion, and a tab separating the triangles, wherein the narrow portion of the triangle points toward the second side edge of the second side web; contacting the first and second wing portions by folding them toward each other, thereby forming a folded web; rotating the folded web to the horizontal; sewing the first and second webs together in the riser with a repeating pattern comprising a flat-bottomed U shape with tabs separating the repeating U's, where the flat bottom of the U faces the first side edge of the first and second side webs, and the tabs separating the flat-bottomed U's are bisecting the tab separating the triangles in the first and second wing portions, thereby forming a web of sewn bags; cutting the web along the edge of sewn bags to remove the sewn portion corresponding to the flat bottom portion of the flat bottom U shape parallel to the edge, thereby forming a web of open top bags; and transversely cutting the web of open top bags at the middle of the truncated triangles and bisecting the repeating U's, thereby forming separate, open bags, and optionally scrap material.