Abstract: A flat presser for supporting blanking material during operation of a blanking tool for making packaging blanks includes a plurality of coaxially oriented, concentric wall sections of progressively different interior areas and being collapsible from an extended position wherein the wall sections partially overlap in an axial direction to a collapsed position wherein the wall sections substantially completely overlap in the axial direction, and a biasing mechanism for biasing the wall sections to the extended position.

Abstract: A method of folding a filter bag 10 made from a nonwoven fabric or stiff media to facilitate installation within a filter retainer basket and a folded filter bag 10 arrangement.

Abstract: A method of imparting directional permanency of folding to a sheet, and an apparatus therefor, which is suitable for manufacturing frame bodies, cushioning members and other block products for packaging, from a sheet of paper and other recyclable materials. The method includes a step of moving respective folding working tools, disposed on one or both surfaces of a sheet, required amounts so as to fold the sheet along respective folding ruled lines, and a step of shortening spacings between the respective folding working tools in a uniform ratio in accordance with an apparent amount of shortening in a longitudinal dimension caused by the shifting, while synchronizing with the moving step. Directional permanency of folding can be accurately imparted to the sheet along the folding ruled lines.

Abstract: An apparatus for adjusting folding jaws of a folding jaw cylinder having an axle on which a first cylinder part supporting at least one uncontrolled folding jaw and a second cylinder part supporting at least one controlled folding jaw are provided so as to be rotatable in opposite directions. The apparatus includes an adjusting spindle in one end of the axle of the folding jaw cylinder, two slide members, and a housing attachable to the axle at an end face of the cylinder parts and having two oppositely disposed two housing arms with radially directed guides. Each slide member being slidably arranged in a respective housing arm guide and have one end that engages with the adjusting spindle and another end that is engageable with one of the cylinder parts. Sliding pairs are provided for allowing sliding of the slides within the housing arms in a radial direction.

Abstract: A device for folding flexible articles such as shirts, towels, piece goods and the like comprising a generally flat main member with two side panels foldably attached to the main member. A base attached to the main member supports the main member and elevates it above a support surface and comprises a generally flat base member and four side panels that each fold and lock in place to form the sides of the base support. The device is preferably made of corrugated cardboard and scored or perforated at the various fold lines. The device can be expanded for flat storage and folded for use.

Abstract: A box forming apparatus for forming a box from a pressed cardboard blank which has been introduced on a forming matrix. The apparatus has two rectangular end plates joined together by a bridge by means of a guide and bolt system in each plate. The guide and bolt system permits variation and adjustment of the height of the apparatus with regard to the machine support. Two winged plates are pivotally attached between the end plates, the winged plates pivoting freely without the aid of pistons or springs. The respective axes of rotation of each of the wings is located at their respective top edges. The pivoting of the wings is delimited by round profiles, or stops, located on the end plates at two separate locations. One set of the stops prevent motion inward towards the center of the end plates, while a second set of stops prevent motion outward away from the center of the end plates. The wings have a bevelled bottom edge for relatively free sliding motion as the wings contact the cardboard blank.

Abstract: A tray-like mandrel for an automatic packaging machine has a telescoping bottom so that it may be made wide in order to receive a product or narrow in order to fit into a box. The telescoping is controlled by a slot track cam extending along a path followed by the mandrel. A cam follower riding in the slot track adjusts the tray width.

Abstract: A progammable, dynamically adjustable die stamping apparatus for die-stamping of cardboard blanks used in production of packaging trays is disclosed. The apparatus includes a dimensionally adjsutable die having a plurality of separate movable parts each coupled to threaded adjustment rods and drive motors; a programmable control is coupled to the drive equipment and can selectively adjust and lock the die parts to conform the die to any one of a plurality of cardboard blank formats. Plural air-operated lockable jacks coupled to movable members of a stamp are also provided, and the jacks operate to automatically adjust the stamp to conform to the selected dimensions of the die. The apparatus can accept plural magazines of cardboard blanks and a plurality of different blanks supplied successively; under program control, the apparatus can automatically change the dimensions of the die and stamp to conform to the desired dimensions of the finished tray.

Abstract: A programmable, dynamically adjustable die stamping apparatus for die-stamping of cardboard blanks used in production of packaging trays, and a process for operating such apparatus. The apparatus includes a dimensionally adjustable die having a plurality of separate movable parts each coupled to threaded adjustment rods and drive motors; a programmable control is coupled to the drive equipment and can selectively adjust and lock the die parts to conform the die to any one of a plurality of cardboard blank formats. Plural air-operated lockable jacks coupled to movable members of a stamp are also provided, and the jacks operate to automatically adjust the stamp to conform to the selected dimensions of the die. The apparatus can accept plural magazines of cardboard blanks and a plurality of different blanks supplied successively; under program control, the apparatus can automatically change the dimensions of the die and stamp to conform to the desired dimensions of the finished tray.

Abstract: A draw tape bag apparatus passes a web of plastic material having edge notched hems in the opposite edges to receive closing tapes. A hem sealer unit seals the folded layers of the web longitudinally of the folded edge to form the hem. The sealer unit includes a drum unit rotatably mounted on a shaft. The drum unit includes first and second drum parts having coaxial peripheral surfaces. A heat concentrating and release tape is secured to each drum part. The adjacent intermediate ends of the drum parts have telescoping and mating fingers and receses. Separate adjustment screws are coupled to the machine frame adjacent each drum part. Each screw is coupled to the outer race of a ball bearing secured to the adjacent outer end wall of the drum part. The setting of the screw accurately locates the heat concentrating tape axially of the drum. Hot air nozzles are mounted externally to the drum parts in alignment with the tapes and heat the web passing over the tapes to heat seal the web layers in the hem.

Abstract: An apparatus for processing baglike container blanks by fitting the blank around a pair of forming plates arranged at a distance from each other in parallel, folding a pair of triangular ears flat while projecting the ears sidewise from the portion of the blank to be made into the bottom of a finished rectangular parallelepipidal container, and press-bonding the projected ears to outer surface portions of the trunk of the container at the lateral sides thereof after folding the ears over the outer surface portions. The apparatus includes a device for press-bonding the triangular ears, which comprises a pair of press members and a support member positionable therebetween. Each lateral side trunk portion and each ear folded thereover are clamped between the support member and the press member respectively from inside and outside the blank.

Abstract: A forming assembly for automatic machines for forming boxes from semi-finished flat blanks, comprises a plate support with associated suction means for the semi-finished blanks and a forming mould for the erection of the parts of the semi-finished blank intended to constitute the side walls of the box.The forming mould has simplified longitudinal and transverse forming elements which are adjustable in length, width and height, and the plate support has spring feet supported by modular blocks releasably fixed to the sides of the plate. The plate support also has suction members connectible by a system of external tubing to a vacuum source.

Abstract: A machine for making plastic bags, such as trash or garbage bags, includes a rotary sealing drum of variable diameter, the drum including one or more sealing bars for cross-sealing a flattened plastic film tube passing through the machine. A blanket tensioning system surrounds the drum and is adjustable to compensate for different drum diameters. The sealed film passes over a chill roll after leaving the drum-blanket assembly and is drawn over folding boards by pull rolls. The sealed and folded film is then perforated by a fly knife and is preferably also cut on the sides to produce a connected series of bags which may easily be separated from one another to make the bags suitable for easy dispensing packages. A variator assembly may also be provided to insure a proper skirt length between the cut-perforation and the bag seal.

Abstract: In a method of producing a container having a bellows bottom (2) and a protection lid (3), sleeve (1) is maintained in one axial position while a bellows bottom blank (27) is pressed into sleeve (1) to a position whereat it is welded in place by heating the thermoplastic, whereupon sleeve (1) is axially moved to and maintained in another position and lid blank (3) is pressed into sleeve (1) to position whereat lid blank (3) is similarly welded in place. The apparatus comprises a carrier (9) having an opening for supporting sleeve (1) in each of two (raised and lowered) positions, a welding ring (10) around the opening for melting the adhesive, and a plunger (11) for successively pressing the two blanks (27, 3) into sleeve (1), while at the same time shaping them and forming a folded rim or flange on each.

Abstract: A bottom expander for a flat bottom paper container of noncircular cross-section comprises a ring having an aperture surface for closely embracing the bottom rim of a container and plate-like tool elements, each having a radially outer edge surface which opposes and clampingly cooperates with that aperture surface. Each tool element is fastened to the front end of a leaf spring, the rear end of which is anchored in fixed relation to a support for the ring. The leaf springs support the tool elements in coplanar relation and so flex as to confine the tool elements to translatory motion that carries their outer edge surfaces toward and from the aperture surface, thus eliminating sliding guidance for the tool elements. The leaf springs also bias the tool elements to home positions in which they are spaced from the aperture surface.

Abstract: A folding blade cylinder for use in a rotary printing machine is disclosed. The periphery of the cylinder is provided with a plurality of spaced circumferential slots. Arched carrying bows are positioned within the slots and elements which are capable of expanding under the influence of a pressurized fluid are placed in the slots underneath the carrying bows. Application of the pressurized fluid to the expandable elements forces the carrying bows radially outwardly to increase the peripheral size of the folding blade cylinder.

Abstract: The present invention relates to an apparatus for making a container comprising an outer container of cardboard or similar stiff material and a lining of plastic or other easily formable and preferably gas-sealing material which lining is provided in the said outer container and which at the side of the container to be opened exposes an even single layer of lining material, and which is filled from and closed at the opposite end thereof.The container can be used for packing of any types of goods, but it is in particular suited for packing of compressed and/or evacuated goods of the type which is to be packed hermetically sealed. It is however to be understood that the container can as well be used for packing of any other solid or liquid product.

Abstract: A ring-like head for a slitter-corrugator having an interiorly located spring-pressed pad for pressure contact with an air shaft to preclude inadvertent side shifting of the head at set-up time. The pad has a chamfered peripheral edge for ready movement over edge portions on the shaft.