Abstract: Rectangular blanks of laminated cardboard are converted into containers for foodstuffs or the like in an apparatus wherein the central portion of a blank is clamped between two coaxial tools one of which has a concave blank-contacting surface and the other of which has a complementary convex blank-contacting surface. The tools can enter the cavity of a matrix with edges at one end of the cavity serving to cooperate with edges bounding the surfaces of the two tools so as to define pronounced boundaries between the clamped portion and the adjacent outer portions of the blank. The tool with the concave front surface is caused to penetrate into the cavity and to push the other tool in front of it whereby the outer portions of the blank are converted into a pair of sidewalls with convex outer sides.

Abstract: A process for manufacturing dispenser-container containing wet and dry contents comprising:wet fibrous materials contained in an inner container made of a gas impervious sheet;the inner container having an opening for dispensing the wet fibrous materials therethrough or a weakened line for forming the opening;the opening or weakened line resealably covered by a flexible flap which is repeatedly attached to or removed from the inner container by means of a pressure sensitive adhesive;both the inner container containing wet fibrous materials and materials in a dry condition contained in an outer container while they are stacking with each other;the outer container having a first opening or a first weakened line for forming the first opening formed in a first surface at a portion coinciding with the opening or the weakened line formed in the inner container; andthe outer container having a second opening for dispensing the dry materials or a second weakened line for forming the second opening in a second surface

Abstract: A rigid, hollow cylindrical insert is designed to be located and to remain in the end portion of a deformable plastic tube. The end portion of the tube is situated between thin film layers with the insert aligned with an edge to be sealed. The assembly is placed between the mating pressure dies to be welded. In a single operation, the edges of the layers are sealed to form a pouch as the tube end portion is welded to the layers along the seam at the top of the pouch. The insert supports the tube end portion in a non-deformed state during welding. This permits an effective weld to be obtained with tubes of various structures and, particularly, very soft tubes such as ones with thin walls composed of polyvinylchloride.

Abstract: A method of manufacturing folding paper sacks, especially gusseted sacks, wherein each sack is shaped out of a tubular section separated from a single- or multiple-layer tubular web and closed at both ends with folded bottoms is characterized in that each tubular section continues to be conveyed uninterruptedly parallel to the direction of travel of the tubular web once it has been separated from the tubular web and the forward and/or rear ends of the tubular sections are shaped during the continuous pass by prefolding and crimping over and by the application of adhesive to the folded bottom, transversely to the direction C of travel, and accordingly sealed.

Abstract: A hood-like top closure on a bag top has end portions extending beyond opposite sides of the bag and the end portions are closed against leakage. The top closure may have a zipper separably connecting a pair of attachment flanges one of which extends along and is secured to one face of the bag top along the top opening and the other of which flanges is secured to a second face of the bag top along the opening. More particularly, the end portions of the attachment flanges are adhesively bonded so as to prevent sifting or leakage therethrough. A method of and apparatus for making the bag are also provided.

Abstract: A valve bag having an upper bottom with a valve and a lower bottom symmetrically folded in a manner where the bottoms lie atop the central bag portion in a side-by-side and parallel manner is provided.

Abstract: An apparatus for shaping a web of film with attached fitments into a tubular shape. The apparatus including a plate member including a cut-out portion and an oblong member. The plate member and oblong member defining a channel and cooperating to fold a web of film with attached fitments into a substantially tubular shape.

Abstract: Material for bags with flexible sidewalls having reclosable separable plastic profile bag mouth closures comprising flexible sheet material providing the bag body and sidewalls. The bag mouth closures comprise strips having separably interlockable complementary resilient plastic profiles and lateral pull flanges of greater thickness than the sheet material extending from one side of each of the base portions. The opposite side of each base portion is generally aligned with its profiles. The base portions and lateral pull flanges are secured in laminar relation to marginal portions of the sheet material, and with distal edges of the pull flanges directed toward bag top edges of the marginal sheet portions.

Abstract: A substantially flat collapsed plastic bag with an evacuation form unit insert positioned therein as manufactured to serve as a form about which the filled bag will collapse as it is emptied. The form unit comprises a ring for mounting the unit on the spout of the bag and a multichannel form extending radially from the ring and hingedly connected thereto. A simple method is provided for manufacturing the bag with the form unit insert.

Abstract: A device and method for repositioning sliders on profiled resiliently flexible zipper on bag sections of bag making material travelling along a manufacturing path. The device may comprise a frame, two movable rollers cooperatively opposed to one another mounted on free ends of arms which are pivoted and adapted for moving the rollers toward and away from one another. When the rollers are in close adjacency they are adapted to restrain the sliders for a predetermined interval while the zipper travels on with the bag making material whereby to reposition the slider properly with respect to transverse bag side sealing of the bag sections. The rollers are operable to shift the sliders in opposite directions along the zipper in the cyclical operation of the associated apparatus, whereby to test proper functioning of the sliders.

Abstract: A machine and method for making bags from two webs of film material with the bag being provided with a fitting having an access passageway therethrough and a flange that is heat sealed to the inner side of one wall of the bag. The two webs are advanced step by step from a feed station, the movement during each step being for lengths of the webs sufficient to provide portions for making a bag. The movement of the web is through successive stations with one web underlying an upper web. In the first of the successive station fittings are fed into a trackway having a downwardly sloped portion and a horizontal portion extending below the upper web. A hole is punched in the upper web and at the end of the horizontal position of the trackway is provided which serves to receive and align the fitting with a hole in the upper web, during a pause in the advancing movement of the webs.

Abstract: The top end of a side gusset of a reclosable sack is securely closed as by means of spots of adhesive on and between the infolded gusset walls, leaving the bag walls free to spread relative to the gusset, and leaving the remainder of the gusset to its opposite end free to expand. A method and apparatus are provided for making the sacks.

Abstract: An apparatus for consecutively applying relief valves to a wrapper sheet fed to the apparatus comprises a chute defining a substantially vertically oriented inner track for receiving the valves in a series; a channel introducing the valves into the track; a retainer for alternatingly holding back and releasing a momentarily lowermost valve in the track; a valve advancing mechanism for intermittently causing the momentarily lowermost valve to clear the retainer; a welding device situated below the retainer adjacent the chute externally thereof for cyclically bonding a valve to the wrapper sheet; and a positioning device situated underneath the retainer for aligning the valve released by the retainer with the welding device. The wrapper sheet passes between the positioning device and the welding device. The apparatus also has a cutter for cyclically providing an opening in the wrapper sheet at the intended location of the valves.

Abstract: An improved bag construction, and a method of bag forming, are disclosed which gives an economical yet strong, burst- and leak-resistant closure without the necessity of sewing or use of expensive stepped cut tubes. The bag is formed using a tube having opposed, interconnected front and rear panels, wherein a pair of laterally spaced, parallel cut lines are provided adjacent the top margin of the tube which define opposed first and second marginal flaps respectively in the front and rear panels. In bag-forming operations, the first flap is folded and glued against the outer face of the front panel, and the closure is completed by folding and gluing the second flap over the open end of the tube in a manner to refold the first flap and engage the outer face of the first panel. In another embodiment, a filling valve is inserted between the front and rear panels adjacent the closure end during the bag-forming operation, so as to provide a valve bag.

Abstract: In making a plastic bag having a filling pipe, to overcome the difficulty of separating the overlying walls of a flattened tube of plastics material, one wall (11b) of the flattened tube (10) is cut to form a flap (17) and the opposite wall (11a) of the flattened tube is cut to form an opening (14), registering with at least a part of the flap; two pairs of clamping members (22, FIG. 4) engage the flap at the location of the opening and are moved to cause the flap (17) to extend out of the plane of the first wall of the tubing; and the filling pipe (26) is then inserted between the pairs of clamping members (22) and on the inner side of the displaced flap to enter the space between the overlying walls of the tube. Thereafter the walls of the flattened tube are sealed around the filling pipe.

Abstract: A multiwall bag having an interior plastic pouch formed from a sealed plastic tube having a longitudinal seam comprising overlapping tube margins sealed together by two spaced seals to provide a channel, one of the tube margins being formed with openings providing communication between the interior of the tube and the channel to permit escape of air from the tube. A strip of material is disposed along the length of the channel to prevent the overlapping tube margins from adhering to each other between the spaced seals.

Abstract: When two sheets of slack material, for example the two sides of a paper or plastics bag, are to be separated by means of a pointed tool, problems arise because the two sheets can easily bend over, both in the same direction. If moreover these sheets are formed from smooth material, they also adhere together by vacuum sealing or by electrostatical forces. The solution for these problems is to enclose the sheets into a positioning block, in which a hollow space is recessed or saved for receiving the volume of the pointed tool to be driven thereinbetween. This driving-in of the pointed tool can be combined with the issuance of pressurized air between the sheets. To this end the pointed tool is provided with grooves for guiding the pressurized air or with a separate blow-pipe slidable over the pointed tool.

Abstract: Self-contained reusable pour spout structure is made by means and methods compatible with low-cost bag production machinery and methods. Thus, a memory strip with an internal metallic strip and an external cover compatible with attachment to the bag material by heat welding, gluing or sewing, is simply placed at a desired access opening position, attached along its length on one bag layer and attached at opposite ends to two bag layers with the intervening distance unattached to the second bag layer. This strip then is manually deformed into a bowed position to open the spout and is straightened to close the spout over a plurality of use cycles. The bags so made are useful for containing and dispensing candy, cereal and like products.

Abstract: An apparatus for containing and dispensing a liquid under pressure includes a flexible container, preferably blow molded of a plastic composition, defining an inner region for containing the fluid under pressure. The container is inert with respect to the liquid contained therein and has a plurality of longitudinally extending creases to allow folding of the flexible container inwardly along the creases. The flexible container is capable of being folded along the creases in its empty condition radially and expanded when filled with the fluid under pressure. A tubular fabric sleeve open at both ends which is elastic in radial directions surrounds the flexible container in its folded condition. A tubular resilient member also open at both ends is positioned about the fabric sleeve when the flexible container is in its folded condition.

Abstract: A payout coil of tape for forming substantially instantly openable and reclosable package closures over the flattened mouths of packages in mechanized packaging operations. The tape is a unified structure having a layer of solid non-tacky thermoplastic polymeric material. Optionally, the only layer of a tape may be a polymeric layer; and the polymeric layer may exhibit adhesive properties. Tapes with a backing are preferred, as are tapes which include a layer of adhesive activatable to tackiness at elevated temperatures and remaining tacky at temperatures lower than those at which the polymeric layer exhibits tackiness. The adhesive layer may be separately applied as a hot melt at the time of adhesively fixing the tape to a package. A tearstrip structure is integrally conjoined with and preferably embedded in the polymeric layer, and at least one deformable deadfold strip is also embedded in the polymeric layer.

Abstract: An automated system is provided for manufacturing flexible plastic blood containers (10) having closed ports (22, 24) and a donor tube (26) extending from one end (20) of the containers. First (12a) and second (12b) webs of plastic material are conveyed to a port sealing station. Mandrels (71-85) are provided intermediate the first and second webs at the port sealing station. The mandrels are moved forwardly through both webs so that the front ends of the mandrels extend past opposed ends of the webs to engage the closed ports and donor tubes. The mandrels are retracted to bring the closed ports and donor tubes intermediate the opposed ends of the webs, and the opposed ends are heat sealed to each other. The mandrels are retracted further to disengage from the closed ports and donor tubes. The webs are conveyed to sealing and cutting stations (64, 66) to seal the sides and other end of the webs and to cut the webs transverse their direction of conveyance.

Abstract: A machine and method for making pouches from plastic film material, with one or more fittings secured to a wall of the pouch. A web of the plastic film material is progressed through fitting depositing and fitting securing regions, after which pouches are made which incorporate the web portions to which the fittings are secured. All operations of the machine are automatic.

Abstract: Sealed, flexible containers may be manufactured with a sterile, openable seal member by inserting part of a thermoplastic tube between a seal in such a manner as to permit the tube to communicate across the seal. In manufacture, the outer end of the tube may be enclosed with a thermoplastic pocket member having open inner and outer ends. A mandrel is inserted through the outer end of the pocket member and the tube. The thermoplastic sheet members, tube, and inner end of the pocket member are sealed together. Following this, the mandrel is withdrawn through the outer end of the pocket member which outer end is then also sealed, for a sterile seal, if desired. A novel design for a container seal is also disclosed.

Abstract: Method of manufacturing a filled packaging container comprising the steps of forming a bag on a mandrel, connecting a seam provided in a formed bag, forming a hole on an upper side of the bag and inserting a valve into the hole to provide an air pressure release after filling the container with a material. Two opposite edges of the valve are formed with two flexible portions made of foil. A sealing fluid is applied in the channel to provide a fluid film to connect the foil portions.

Abstract: A web of bag-making material has longitudinally folded rectangular sheets adhered at intervals to one face by one flap before longitudinal margins of the web are folded over, stuck to the other flap of each sheet and joined where they overlap to define a tube, whereafter sections are severed from the tube to make bags to be formed with cross-bottom closures at the ends. The size and position of each folded sheet is such that it will subsequently form an internal seal for the respective cross-bottom closure but the sheet for the closure at one end is made as two longitudinally aligned segments of which one segment has been transversely pre-folded back onto itself to define a tab adjacent the edge of the other segment with the length of a subsequent filling valve for the bag. Following formation of the cross-bottom closures, the filling valve is formed by unfolding the pre-folded tab.

Abstract: Method of manufacturing a filled packaging container comprising the steps of forming a bag on a mandrel, connecting a seam provided in a formed bag, forming a hole on an upper side of the bag and inserting a valve into the hole to provide an air pressure release after filling the container with a material. Two opposite edges of the valve are formed with two flexible portions made of foil. A sealing fluid is applied in the channel to provide a fluid film to connect the foil portions.