Abstract: The invention relates to a process for closing mesh bags, in which a longitudinal portion of constricted mesh is compressed together with a portion of at least one plastic strip provided with a width greater than that of the constricted mesh such that respective side bands of the strip project on both sides of the constricted mesh, the process further comprising the operations of introducing in a die the compressed longitudinal portions of strip and mesh such that the mentioned side bands are bent towards the constricted mesh; folding the bent side bands of the strip over the constricted mesh; and causing the melting of the materials forming the folded strip and the constricted mesh, determining one or several attachment sections between the folded strip and the constricted mesh along the compressed portions of the mesh and of the strip.

Abstract: The present invention relates to a process for the formation and the filling of bags, applicable to tubular mesh bags closed at their two ends and provided with a handle formed by a plastic strip attaching said ends, comprising the operations of constricting a mesh section of a portion of mesh previously drawn from a storage and attaching it to a section of the strip of a portion of strip previously drawn from its storage, determining at least one securing area between both sections of the mesh and of the first strip, to make a first closed end of the bag to be formed, still empty, and a second end of the immediately previous bag still in formation, already filled; and of transversely cutting both attached sections of the mesh and of the first strip so that the first closed end is gripped by the first strip during the entire following process of filling and formation of said bag, including operations of drawing new portions of mesh and of strip from the corresponding storages and of filling of the bag before

Abstract: The invention relates to a device for the filling of bags in automatic machines for the formation, filling and closing in a continuous process of bags from a tubular mesh, of those comprising a tubular body outside which the storage of tubular mesh is assembled, the device comprising means for the conveyance of individual pieces of large fruit and vegetable products, such as melons, watermelons or the like, from a loading position to a delivery position, and means for the holding and transfer, one by one, of the individual pieces conveyed to the delivery position, which comprise a head for the holding and subsequent release of the pieces and a mechanism for transmitting to the head a movement the path of which comprises a vertical downward section, of a sufficient length to convey the held piece through the inside of the tubular body of the machine towards the mouth of a bag open at the upper part, and such that the piece is accompanied in its entire downward path.

Abstract: Hanging laminar label having a main portion of essentially rectangular sheet of a width H and with a longitudinal central appendage, which is essentially rectangular and of a narrower width h, wherein the appendage is attached to the main portion by a connection neck that has a central portion of a constant width z and the distal end of the appendage has a wider section with a portion of a constant width Z, the sum of the widths of the main portion and the appendage H+h being equal to the sum of the widths of the connection neck and the wider section of the appendage z+Z.

Abstract: The present invention relates to a process for the continuous production of mesh bags, comprising the operation of cutting longitudinal portions from a body of bag formed by a longitudinal section of flattened tubular mesh and a longitudinal section of at least one flexible sheet applied and attached to one of the faces of said tubular mesh, in which prior or subsequent to the application of the sheet on the mesh said sheet is passed through detection means, suitable for detecting the passage through the detection field of a section of sheet provided with a marking, transparent to visible light and luminescent upon being radiated with ultraviolet or infrared light. The detection of said marking automatically triggers the performance of the operation of transversely cutting the continuous body of bag into a length corresponding to that of a bag.

Abstract: The invention relates to a band of windable plastic material, applicable for the production of bags, such as mesh bags, comprising a plurality of markings, distributed along its length, transparent to visible light and luminescent upon being radiated with ultraviolet or infrared light. According to an embodiment, the band is made up of two superimposed sheets, of which the inner sheet is intended to be applied on a bag, whereas the outer sheet is intended to be exposed outside of the bag, the mentioned markings being printed on the inner face of the outer sheet.

Abstract: Strip (1) of compostable plastic material of the type that has sealing areas (2) that are designed to be heat-sealed to a compostable mesh (3) or section thereof, which includes an inner sheet (4) of compostable plastic material with a melting temperature that is appreciably the same as the melting temperature of the mesh or section of mesh. The inner sheet (4) is thermally protected by an outer layer (5,6). Also disclosed is packaging (7) of compostable material that is adapted to cover food products (8), which includes a mesh (3) of compostable material that is adapted to come into contact with the food products (8); and at least one strip (1) as described above. The packaging (7) takes the form of a single sheet (14) or a bag (10) with a flexible tubular mesh body (9) of compostable material that can be heat-sealed to strips (1).

Abstract: Hanging laminar label consisting of a main portion of essentially rectangular sheet of a width H and with a longitudinal central appendage, which is essentially rectangular and of a narrower width h, wherein the appendage is attached to said main portion by a connection neck that has a central portion of a constant width z and the distal end of the appendage has a wider section with a portion of a constant width Z, the sum of the widths of the main portion and the appendage H+h being equal to the sum of the widths of the connection neck and the wider section of the appendage z+Z.

Abstract: Bag for packaging food products, particularly fruit and vegetable products, which comprises a flexible tubular body, the central portion of which is designed to house the products contained in the bag and the longitudinal ends of which are closed, a flexible oblong element, such as a strip, which is considerably shorter than the tubular body of the bag, being solidly joined to both closed ends, which acts as a handle whereby to suspend said bag, the tubular body being overdimensioned in relation to the volume of the products housed therein, so that when the bag is suspended from the strip that acts as a handle, it is U-shaped, with its end portions empty and in a vertical position and with its central portion filled with products.

Abstract: Folding blade (1) that is particularly applicable to devices for the closure of flexible tubular packaging, taking the form of a flat plate, provided on one of its lateral edges with a tab (5) in the form of a hook that is adapted to hold the packaging, of the type that is disposed opposite and perpendicular to a lateral portion of the packaging and attached to an axis of rotation (3) that transmits thereto a reciprocating rotational movement around the axis. This folding blade (1) comprises a main body (2) that can be attached to the axis of rotation; an end portion (4) provided with a tab (5) that is joined by articulation to the main body by its free end opposite the axis of rotation (3); and an elastic means (6) that exerts a permanent pulling force on said end portion, thus maintaining it in the initial position, folded over the main body of the blade.

Abstract: Folding device, for use in sealing flexible tubular containers by adhering two facing portions on the same end edge, which comprises two groups of rotating paddles that face one another, able to turn simultaneously and so that each paddle in the same group pushes respective portions inside a side of a container positioned between the two groups of paddles, the paddles of the same group being able to move towards or away from one another, and preferably being connected via an element with elastic properties.

Abstract: The invention relates to a mesh for bags or packaging, produced by knitting technology by warping in a circular loom of simultaneous mesh formation. The mesh constitutes a uniform tubular mesh structure wherein the warp yarns or bands form mesh chains parallel to the longitudinal axis of the tubular mesh and the weft yarns or bands perpendicular to said axis are interwoven between at least two adjacent mesh chains so that each weft yarn or band traverses the meshes of said chains, constituting a uniform tubular mesh without longitudinal seams or perpendicular mesh bonds.

Abstract: Folding blade (1) that is particularly applicable to devices for the closure of flexible tubular packaging, taking the form of a flat plate, provided on one of its lateral edges with a tab (5) in the form of a hook that is adapted to hold the packaging, of the type that is disposed opposite and perpendicular to a lateral portion of the packaging and attached to an axis of rotation (3) that transmits thereto a reciprocating rotational movement around the axis. This folding blade (1) comprises a main body (2) that can be attached to the axis of rotation; an end portion (4) provided with a tab (5) that is joined by articulation to the main body by its free end opposite the axis of rotation (3); and an elastic means (6) that exerts a permanent pulling force on said end portion, thus maintaining it in the initial position, folded over the main body of the blade.

Abstract: The invention relates to a mesh for bags or packaging, produced by knitting technology by warping in a circular loom of simultaneous mesh formation. The mesh constitutes a uniform tubular mesh structure wherein the warp yarns or bands form mesh chains parallel to the longitudinal axis of the tubular mesh and the weft yarns or bands perpendicular to said axis are interwoven between at least two adjacent mesh chains so that each weft yarn or band traverses the meshes of said chains, constituting a uniform tubular mesh without longitudinal seams or perpendicular mesh bonds.

Abstract: It is disclosed a device (1) for altering the storage capacity of a tubular mesh bag of heat sealable material during the manufacture thereof and the bag (15) obtained from its using. The device comprises an expansion core (2) to which the tubular mesh is peripheral, which is essentially oblong and will be inserted vertically inside the tubular mesh, thus determining two from faces (21) and two side faces of said mesh as it passes over the expansion core. The device has a mechanism for inserting, in a variable way as the mesh passes over the expansion core, sections of the peripheral tubular mesh into it, thus accumulating a greater or smaller quantity of mesh in each longitudinal section of mesh corresponding with one bag unit.

Abstract: Machine for manufacturing mesh bags from a continuous roll of tubular mesh, and for filling and closing said mesh bags, which comprise an expansion device which is perimetric to the tubular mesh, the core expander of which is equipped with a vertical aperture which, as if it were a slot, traverses said core expander and connects the two frontal faces thereof and extends from its base to an intermediate point, for which the core expander adopts an inverted “U” shape, the machine also being fitted with preventive welding means, adapted for partially welding the two frontal faces of the tubular mesh and, as the case may be, the adjoining laminates of thermally weldable material through the aperture of the core expander; a traction device which drags a section of the tubular mesh provided with a bottom; conveyor means; and second and third filling and closing stations, respectively, both being arranged linearly.

Abstract: Folding device, for use in sealing flexible tubular containers by adhering two facing portions on the same end edge, which comprises two groups of rotating paddles that face one another, able to turn simultaneously and so that each paddle in the same group pushes respective portions inside a side of a container positioned between the two groups of paddles, the paddles of the same group being able to move towards or away from one another, and preferably being connected via an element with elastic properties.

Abstract: Method for the movement by friction of a set of two bands of superimposed flexible material, using at least two feed rollers that turn in the direction of band movement so that they are all pulled in unison, occasionally involuntary offsetting can occur in the mutual correct position of the bands, the method includes the placing of antifriction devices between both adjacent bands that allow mutual movement between both bands when they are pressurised between the opposite rollers and are pulled by them, without slipping between the bands and rollers, and because on at least one operative cycle the method includes an adjustment stage wherein the two rollers have a tangentially different speed so that one of the bands is pulled to a greater distance than the other, in order to correct the aforesaid involuntary offsetting in the mutual position between both bands.

Abstract: Machine for manufacturing mesh bags from a continuous roll of tubular mesh, and for filling and closing said mesh bags, which comprise an expansion device which is perimetric to the tubular mesh, the core expander of which is equipped with a vertical aperture which, as if it were a slot, traverses said core expander and connects the two frontal faces thereof and extends from its base to an intermediate point, for which the core expander adopts an inverted “U” shape, the machine also being fitted with preventive welding means, adapted for partially welding the two frontal faces of the tubular mesh and, as the case may be, the adjoining laminates of thermally weldable material through the aperture of the core expander; a traction device which drags a section of the tubular mesh provided with a bottom; conveyor means; and second and third filling and closing stations, respectively, both being arranged linearly.

Abstract: Bags, (1) produced at generic machines (2), are removed by means (3) toward grippers (5) associated to a conveyor line consisting of endless chain sections (4)-(10), including means (8) for weighing the bags (1), and bar-code and bag dimension verifying means (48) and (28). The sections (4) and (10) are related by transfer means (9) which may or may not connect the same, depending on an order received from means (8), (48) and (28), rejecting in the latter event faulty bags or grippers without a bag, or directing them toward a fitting station (12) at which the grippers and bags are released from the chain (10), suspended at different heights and grouped in the projection of a box (16) that is lifted toward the group by a lift (17).