A folding wedge device for a bag packaging machine for continuously adjusting a bottom fold of a bag, comprising: a feed area for continuously feeding a flat packaging foil; a discharge area opposite the feed area for discharging the packaging foil folded centrally by means of the folding wedge device, a folding wedge with two folding wedge strips converging towards one another in a wedge shape from the feed area to the discharge area for deflecting the packaging foil; a counter tip arranged behind the folding wedge strips in the conveying direction of the packaging foil for inserting the bottom fold between the packaging foil sections folded centrally on top of one another, the folding wedge strips having end sections pointing towards the counter tip; wherein a lateral distance between the end sections of the folding wedge strips is infinitely adjustable.

The invention relates to a preformed bag (1) which is manufactured continuously from a film of flexible plastic material, in particular PET/PE, with a thickness of less than 200 microns, in order to form a front wall (1a) and a rear wall (1b) assembled at the lateral sides thereof, optionally in combination with gussets (1c) and (1d), a bottom (1e) and a filling opening (1f). A portion of the bag (1) has arrangements for fastening a rigid frame (2), capable of defining an opening communicating with the inside of the bag, said frame being provided with a sealing means (2a).

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 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 first feed device adjusts an intermittent feed amount thereof based on output of a first sensor such that a design position of a first panel is aligned with a first fixing position during every pause phase of an intermittent feed cycle. A second feed device adjusts tension of a second panel and an intermittent feed amount of a feed unit based on output of at least one second sensor such that a design position of the second panel is aligned with a second fixing position during every pause phase of an intermittent feed cycle. A third feed device adjusts an intermittent feed amount thereof based on output of a third sensor such that the design position of the first panel is aligned with the second fixing position during every pause phase of an intermittent feed cycle.

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.

Methods of making vents in containers made from flexible materials, including forming vent openings in a first flexible material, forming vent stand-offs on a second flexible material, and combining the flexible materials to form a vent passage for the flexible container.

An apparatus is configured to make containers from sheet material. The apparatus includes a supply station for supplying a film having at least one folded portion having three or more film flaps folded and superimposed with respect to each other; a welding station configured to receive the film. The welding station comprises a welding head configured for welding the folded portion of the film and forming a container defining a housing compartment; the welding head comprises a heater made of electrically conductive material whose electrical resistivity, at least in a predetermined temperature range, decreases upon the increase of the temperature of the same electrically conductive material.

An improved paperboard pouch comprising a multilayer substrate and a method of making the same is provided. The multilayer paperboard pouch comprises an outer surface and an inner surface, wherein one of the surfaces is defined as a food contact surface. In the depicted embodiment, the properties of the polymer layer are chosen to provide adequate mechanical and barrier protection to the paper-based pouch formed on the conventional pouch-forming equipment. A method of manufacturing a multilayer paperboard pouch using conventional bag-making equipment (“CBME”) running at normal production speed for making standard plastic pouches is also provided. First, a paper is extrusion-coated and then the CBME is configured with a feeder for feeding an extrusion-coated paper intermittently for a length along a feeding path; a cutter disposed at a position predetermined for cutting one of the layers of the coated paper and forming a first side gusset, a second side gusset and a bottom gusset portions and for folding each of a first side gusset, a second side gusset and a bottom gusset portions into halves along a center line extending longitudinally thereof; and a sealer for sealing the layers of the polymer with the layers of the bottom gusset portion and the layers of the first and second gusset portions, respectively to form the finished multilayer paperboard pouch ready for sale and distribution to various retailers. It is to be noted that in the depicted embodiment various closure constructions and mechanism can be used for heat sealing the finished pouches.

The invention is directed to a method and apparatus for maintaining the inflation level of a bubble formed by nips in a moving roll of tubular film, to form a gusset in a final product produced from the film.

A side gusset paper container in which in the region of the transition of the front wall to a first part of the container bottom region, there is a first pre-crease, and in which in the region of the transition of the rear wall into a second part of the container bottom region, there is a second pre-crease. Furthermore, the disclosure relates to a method for producing a side gusset paper container, in which at least one or a plurality of linear pre-creases are formed in the inner side of a paper web. Additionally, the disclosure relates to a use of the side gusset paper container according to the disclosure as a compost collecting and/or carrying container and/or as a fillable container which is self-standing in the unfilled state.