Abstract: A method and apparatus are provided for forming pleats in a thermoplastic material by feeding a continuous web of sheet-like thermoplastic material to a pleat forming apparatus and subsequently drawing the web through a bonding device. The pleat forming apparatus includes a rotating drum that has a plurality of apertures and a plurality of radially extensible teeth positioned in peripheral slots. The teeth are spring-biased inwardly to a retracted position within the drum but are extendable, under the urging of an internal cam, to a position wherein a portion of each tooth protrudes outwardly from the drum. The web is carried around the drum and the teeth protrude into the web forming pleats.

Abstract: Compositions and methods for manufacturing containers from sheets having a hydraulically settable matrix. Suitable compositions are prepared by mixing together a hydraulic binder, water, and appropriate additives (such as aggregates, fibers, and rheology-modifying agents) which impart predetermined properties so that a sheet formed therefrom has the desired performance criteria. Hydraulically settable sheets are formed from the mixture by extrusion, then calendering the sheets using a set of rollers and then drying the sheets in an accelerated manner to substantially harden the sheets. The resulting hydraulically settable sheets may have properties substantially similar to sheets made from presently used materials like paper, cardboard, polystyrene, or plastic. The sheets can be laminated, corrugated, coated, printed on, scored, perforated, cut, folded, rolled, spiral wound, molded, assembled and seamed to mass produce articles of manufacture from the sheets such as food and beverage containers.

Abstract: A system for controlling the rate of heat transfer between the heating surfaces and a corrugated web in a double backer includes an air flow system operable to selectively apply a vacuum to the underside of the web via chambers formed in the spaces between the heating units or to apply pressurized air to the chambers to cool and lift the web, as necessary. A complementary system controls bowing in the surfaces of the heating units by supporting the undersides of the heating units with columns which include a thermally responsive metal member having an known coefficient of thermal expansion. The metal members are selectively heated by heating elements responsive to sensed bowing of the heating units to eliminate or minimize such bowing.

Abstract: A method and a device for producing corrugated strip packaging parts to be used for packaging cylindrical or elongated parts in separate compartments. The device includes a series of form bodies arranged on an endlessly rotating belt. The form bodies have essentially the same inside cross-section as the lower loops of the corrugated strip material formed by the device and are joined together at their base flanks by elastic material areas. The belt is guided over rerouting points that temporarily spread apart two adjacent form bodies to form an enlarged intermediate space. A form tool is arranged adjacent one of the rerouting points to engage and press the material of the packaging part into the enlarged intermediate space.

Abstract: A method of manufacturing a container for the temporary storage of foods is disclosed. The container includes a corrugated medium having a single backer paper thus creating an exposed corrugated surface on a side opposite the backer. The food container is formed such that the exposed corrugation is located towards an interior surface of the container. The method of manufacture involves fabrication of a single-face sheet of corrugated material to which is affixed a tape liner along opposed side edges of the sheet. A wider tape is affixed to the sheet intermediate the lateral edge tapes. The sheet is then cut along a longitudinal midline of the intermediate tape and also across the sheet to form discrete blanks. The blanks are substantially single-face corrugated material but have double-face corrugated material along the lateral edges where the tape was applied. Thereafter, the blank may be further cut, scored and folded to form containers having a single-face,bottom panel and double-face side walls.

Abstract: A method is provided for forming a corrugated structure from a fibrous web by first forming a fibrous web; alternatingly lapping the fibrous web; folding the fibrous web to form corrugations; brushing fibers from one corrugated peak to extend to an adjacent peak and bridge the gap therebetween; spraying resin on the corrugated fibrous web; heating the resin-sprayed corrugated fibrous web; or further sandwiching said fibrous web with a pair of outer webs with resin sprayed thereon and heating said sandwiched fibrous web. Another embodiment initially combines fibers of low melting point with regular fibers and heats the corrugated fibrous web after brushing, rather than spraying resin on the corrugated fibrous web.

Abstract: A flexible, sheet-like solar heating cover is composed of at least one elongated, generally rectangular, plural-ply, laminated plastic cover section. Each cover section has opposite side edge margins and each such section defines between first and second plies of the cover section a pair of transverse headers at opposite ends of each section and a lateral series of longitudinal conduits extending between, and being in fluid communication with, the pair of headers. All adjacent cover sections have contiguous headers which are in fluid communication with each other so that liquid can flow from the header at one end of each cover section through the fluid conduits to the header at the other end of each cover section. Fluid connections are provided to the headers at opposite ends of the cover. A method and apparatus for making the cover are also disclosed.

Abstract: Corrugated paperboards are prepared for corrugation and adhesive bonding of mediums and liners by exposing the mediums liners and adhesives to radiant energy from a thermal source ranging from 1100.degree. C. to 2300.degree. C. and emitting a dominant wavelength in the range of 2.1 to 1.0 microns. The speed of adhesive bond development is increased. Polymeric adhesives may be used as alternatives to conventional starch based adhesives.

Abstract: A product order specification change system for a corrugation machine having a slitter-scorer device and a plurality of cutoff devices for producing corrugated board sheets having various widths and lengths, includes a cutting apparatus wherein at an order change where specifications for the sheet width are changed from one order to the next, a region is formed between the leading end of the new order sheets and the trailing end of the old order sheets, wherein a transitional slit groove is cut connecting a slit groove of the old order sheets with a slit groove of the new order sheets. As a result, the web can be stably transferred through stages of the machine, the cutting dimension accuracy can be maintained precisely, and faults such as jamming can be eliminated.

Abstract: A metal pipe and method of forming the same with an integrally formed liner for use in corrosive and abrasive environment is disclosed. The liner is comprised of a relatively thick polyethylene which is thermally bonded to the metal pipe. An intermediate co-extruded polymer layer of ethylene acrylic acid and a polyethylene/ethylene acrylic acid blend is applied to the metal pipe to facilitate thermal bonding. The intermediate layer is applied to the sheet metal in a pre-treatment process prior to roll forming ribs into the sheet metal. The polyethylene liner is applied after the ribs are formed, preferably after the pipe has been formed, to provide a smooth, hydraulically efficient surface which is resistent to the corrosive action of sulfuric acid and the like encountered in sanitary applications, as well as abrasion caused by the flow of water-born debris such as dirt and gravel as is encountered in culvert applications.

Abstract: A variable load ballast system for the double facer of a corrugator includes a number of rows of holddown belt engaging ballast members positioned in side-by-side relation transversely across the belt, with the rows extending over the full heating section of the double facer. Each of the rows is divided into a number of longitudinal segments, each of which segments is controlled by a vertical actuator to move the segment between a lower full load ballast position on the belt and an upper no load position off the belt. The rows may comprise a series of ballast rollers or a continuous flexible membrane and either embodiment provides the ability to vary the ballast load on the holddown belt longitudinally, laterally and in any pattern of symmetry or asymmetry to accommodate a wide range of operating conditions and problems typically arising in the operation of a double facer.

Abstract: An apparatus and method is disclosed for slidably contacting and pressing upon the back side of a conveyor to urge an advancing corrugated paperboard sheet into substantially uniform contact with adjacent laterally extending heating surfaces irrespective of any thermally induced deflection or bowing thereof. A plurality of heating chests arranged in side-by-side relation define the series of laterally extending heating surfaces. A conveyor belt is positioned opposite the series of heating surfaces for advancing the corrugated paperboard sheet longitudinally along a predetermined path of travel. A plurality of contact assemblies provides the sliding contact with the conveyor belt. Each contact assembly, in turn, preferably includes a plurality of contact shoes arranged in side-by-side relation and carried by a laterally extending supporting frame. The contact shoes have contact surfaces slidably contacting the back side of the conveyor belt.

Abstract: Corrugating adhesives free of incompatibility problems with water soluble partially hydrolized polyvinyl alcohol comprise a major portion of water, starch, strong base, a boric acid compound and a partially hydrolized water soluble polyvinyl alcohol composition.

Abstract: Disclosed is a single facer provided with a plurality of fluting units, each consisting of an upper fluted roll and a lower fluted roll which engages with the upper fluted roll and forms a predetermined corrugation on a corrugating medium to be passed between the upper fluted roll and the lower fluted roll in the corresponding fluting unit and to paste a liner onto the glued crests of the corrugating medium; the single facer comprising a single fixed supporting member disposed adjacent to and to oppose to all of the lower fluted rolls via a route of feeding the liner fed to the corresponding fluting unit; a sleeve-like endless belt wound around the supporting member to be able to run freely therearound; and a plurality of pressing members disposed to oppose, via the endless belt, to the lower fluted rolls to be parallel with the respective lower fluted rolls; the pressing members being able to be moved, while maintaining the horizontal posture, closer to the corresponding lower fluted rolls with the aid of pr

Abstract: A no-crush roll system for attaining zero crush across the double backer in a corrugator is disclosed which is retrofittable to most existing machines. The no-crush roll system includes a series of pairs of bearing adapters each formed with a pin received in an overhead support frame with a bearing support cup located at inwardly extending ends of the pin to receive a bearing mounted to opposite ends of the roller. Each bearing is received in an elongate cavity facing the roller which permits the height of the roller to self adjust in response to changes in thickness of the cardboard material being conveyed along a hot plate as the weight of the rollers pressing against the top surface of the cardboard ensure even glue distribution and curing contact without crushing the material. A method of eliminating crush in a double backer of a corrugator is also disclosed.

Abstract: Apparatuses and processes for laminating a finish layer of paper, plastics, film, foil, and other thin sheet material to corrugated material along a corrugator line. The finish layers may be single layer or composite material and are preferably, but not necessarily preprinted, reverse printed, etched or otherwise. The finish layers may be produced, supplied and run in any desired width to suit a customer's needs, without the need to engage in the planning, expense and scheduling necessary to run an entire full width roll of preprint material as single face or double face liner on the corrugator, and without the problems inherent in applying graphics to containers or cartons during the conversion process.

Abstract: The humidity exchanger medium is manufactured by forming a laminate of (i) a corrugated sheet and (ii) a flat sheet bonded to points of contact of a ridged surface of the corrugated sheet, the laminate having been impregnated with sodium silicate waterglass and then partially dried, each corrugated and flat sheet constituted of a paper of inorganic fibers; forming a honeycomb matrix from at least one laminate; soaking the honeycomb matrix in an acidic solution containing at least a titanium inorganic salt to convert the sodium silicate waterglass to a titanium-containing silicate hydrogel; and washing and drying the honeycomb matrix to convert the titanium-containing silicate hydrogel to a titanium-containing silicate aerogel.

Abstract: A method for producing a laminate structure from smooth and corrugated webs which may be used to form a corrugated or cellular contactor for the exchange of heat, moisture, and the like. The paper webs are saturated with a concentrated waterglass solution and partially dried. A first web is then corrugated after which the first and second webs are pressed together to form a laminate structure which is subsequently dried.

Abstract: A screening screen assembly for a vibratory screening machine including an apertured plate, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to the apertured plate. A method of fabricating a screening screen assembly for a vibratory screening machine including the steps of providing a support screen, superimposing a plastic grid onto the support screen, superimposing a finer screening screen onto the fine screening screen, applying heat and pressure to the superimposed screens to fuse the plastic grid and thereby form a flat bonded laminate subassembly by causing the fused plastic grid to permeate the fine screen and the finer screen and the support screen, forming the bonded laminate subassembly into an undulating shape, providing an apertured plate, and bonding the undulating bonded subassembly to the apertured plate.

Abstract: A method of manufacturing an assembly composed of two shaped and bonded parts in which the two parts to be shaped and bonded are placed on a header and die of a press, an adhesive is applied to at least one of the facing surfaces of the parts, the space between the header and the die is pressurized so that the parts are hot-formed to the shapes of the header and the die, and the header and die are then moved towards each other to press and bond the parts together.

Abstract: A method is provided for forming a pallet including thermoforming a pair of plastic sheets and then fusing the two sheets together to form the pallet. One of the two sheets is thermoformed to provide a series of pin assemblies with each pin assembly including a plurality of hollow pin portions extending outwardly. The second sheet is thermoformed to provide a series of leg portions that define a corresponding series of grooves in the sheet, each groove corresponding to a respective pin assembly of the first sheet. The first sheet is assembled with the second sheet such that each pin assembly of the first sheet rests nestingly within the respective groove of the second sheet and then the material of the pin assemblies are fused to the material of the respective grooves. Web portions of the first sheet interconnect adjacent pin portions and are formed as folds extending outwardly in the same direction as the pin portions, but to a lesser extent.

Abstract: The present invention reduces damages in a single-facer expected when foreign matters are bitten between a downstream side corrugating roll and an upstream side corrugating roll, achieves effective utilization of a peripheral space, and also improves a bonding strength between a core paper web and a corrugated paper web by maintaining a temperature of a single-faced cardboard sheet constant.A downstream side corrugating roll and an upstream side corrugating roll are formed in such manner that a pitch circle diameter of the downstream side corrugating roll may be larger than a pitch circle diameter of the upstream side corrugating roll and the ratio of the diameter of the downstream side corrugating roll to the diameter of the upstream side corrugating roll may be a predetermined integer ratio.

Abstract: A method of making a reinforced corrugated board and product therefrom whereby both a single-faced corrugated board and a reinforcing strip are passed through the same adhesive station, before being secured together with a facing liner. The reinforcing strip is passed below the path of the single-faced corrugated board so as to coat both the top and bottom surfaces of the reinforcing strip and the upper, faced surface of the corrugated board. The members are then passed together with a lower facing liner through a pair of pressure rollers serving to secure the layers. The reinforcing strip may also be narrower than the width of the corrugated board and facing liner, and furthermore, a plurality of reinforcing strips may be used.

Abstract: A method for forming a monolithic composite slat for a lightweight pallet. The slat is formed by adhering the crests of a corrugation to one side of a reinforcement sheet, placing another side of the reinforcement sheet in spaced, parallel relation with the corrugation and the first side such that the corrugation is situated between the first and second sides, inserting a flexible fiber in each trough of the corrugation and using each fiber to urge the trough toward the second side, inserting foam-forming material between the first and second sides, and allowing the material to cure, thereby forming a solid, foam-filled slat. The method is advantageous over that of the prior art, as it ensures that the corrugation remains in place during inserting of the foam-forming material.

Abstract: An apparatus for making a single face corrugated board having two fluted mediums bonded together at the flute tips has (a) mill roll stands for two mediums and one liner; (b) a carrier roll fluted to support a first fluted medium; (c) a single corrugating roll of diameter not larger than the carrier roll engaging with the carrier roll to corrugate the first fluted medium; (d) a pair of corrugating rolls of diameter no larger than the carrier roll adapted to produce a second fluted medium, the pair being located and driven relative to the carrier roll to enable the first and second fluted mediums to be brought into flute tip to flute tip contact and to be conveyed by the carrier roll, the axes of the corrugating rolls not lying in a plane common with the single corrugating roll or the carrier roll; (e) a first adhesive application station to apply adhesive to one of the fluted mediums prior to the flute tips of the first and second fluted mediums coming into contact; (f) a second adhesive application station t

Abstract: A method for making an offset corrugated core sandwich construction is diosed. Mandrels of preestablished form and size are arranged into a pattern in a confined area. After covering the mandrels with a release film, strips of pliable, uncured composite material are arranged in a "peak-to-valley" pattern with adjacent strips being out of phase by 180 degrees. Selected mandrels are replaced by a granular mixture and top and bottom face sheets are fitted to the arrangement. After curing, all mandrels are removed from the construction.

Abstract: An improved single-faced corrugated cardboard sheet making machine is provided, in which at the time of sticking a core paper web and a liner to each other in a single-facer equipped corrugating machine, impacts and vibrations are not generated, and hence troubles such as breaking of paper webs do not occur. The improvement resides in that the known single-faced corrugated cardboard sheet making machine having a pair of corrugating rolls for corrugating a core paper web into a wave shape and a pasting member for applying paste to corrugation crest portions of the corrugated core paper web, is further provided with an endless belt for pressing and sticking a liner to the core paper web applied with paste. The pressing condition of the endless belt can be adjusted, and a device for cleaning the surface of the endless belt is also provided.

Abstract: A single-face station for a machine that produces corrugated cardboard comprises a frame which includes a stand with two lateral wall members, a lower cassette which carries a lower pressure roll being positioned on support and resting surfaces formed in the lateral walls, an upper cassette having a pair of corrugating rolls resting on the lower cassette and on guide surfaces in each of the side walls. The resting surface and support surface extend at right angles to each other and obliquely to a horizontal plane and the arrangement includes a holding arrangement to exert a downward force on anchoring points provided in a lower rear portion of the upper cassette in order to hold the upper cassette and lower cassette on their respective resting, supporting and guiding surfaces. In addition, there is an extracting arrangement for allowing the upper cassette to be withdrawn laterally from the frame.

Abstract: A corrugated paperboard strength enhancing process includes at least one resin application station located within the confines of the corrugator at a position where it is operable to apply a preselected amount of a strength enhancing resin to at least one side of the medium after it has been fluted. At least one liner is adhered to the set of opposed flute tips. Thereafter the combined board with the resin compound on selected transverse portions of the fluted medium is allowed to cure, under selected temperature and moisture conditions and without the application of pressure that would crush the fluted medium. A suitable resin for the intended purpose is an isocyanate compound.

Abstract: A metal pipe and method of forming the same with an integrally formed liner for use in corrosive and abrasive environments is disclosed. The liner is comprised of a relatively thick high density polyethylene which is thermally bonded to the metal pipe. An intermediate co-extruded polymer layer of ethylene acrylic acid and a polyethylene/ethylene acrylic acid blend is applied to the metal pipe facilitate thermal bonding. The intermediate layer is applied to the sheet metal in a pre-treatment process prior to roll forming ribs into the sheet metal. The polyethylene liner is applied after the ribs are formed To provide a smooth, hydraulically efficient surface which is resistent to the corrosive action of sulfuric acid and the like encountered in sanitary applications, as well as abrasion caused by the flow of water-born debris such as dirt and gravel as is encountered in culvert applications. Various means for further securing the polyethylene layer to the metal pipe surface are disclosed.

Abstract: A honeycomb structure includes at least two corrugated strips having major flat surfaces extending angularly between opposed strip edges. The strips are offset relative to each other and joined together to define a series of cells extending between the strip edges along axes which are oriented at an angle other than normal to the strip edges. Each of the major flat surfaces includes a central depressed portion forming a matching sub-flat surface which is parallel to and connected to the major flat surface by sidewalls which may be substantially perpendicular to the major flat surface. Abutting undepressed portions of the major flat surfaces of adjacent strips and abutting sub-flat surfaces of adjacent strips are joined together so that the strips form a series of I-beams disposed one to a cell.

Abstract: A sealing device, which is situated between a rotary cylinder and the opposite edge of a wall of a pressure case, is used in a rotary machine and comprises a seal fitted over its whole length along an edge of a wall, which is parallel to the axis of rotation of the cylinder, and the wall is shifted toward the cylinder by a pressing arrangement so as to enable the seal to be applied against the cylinder. Specifically, the seal has the shape of at least one lengthwise brush with the bristles, which consist of a relatively flexible and heat-resistant material, which is preferably a synthetic material.

Abstract: A machine for making corrugated board, comprising means to feed two separate webs between two respective pairs of corrugating rolls to form two corrugated layers, a first adhesive application for applying adhesive to the peaks of at least one of the two corrugated layers, means to bring the two corrugated layers together at the peaks of the corrugations, means to convey the joined corrugated layers past a second adhesive applicator for applying adhesive to the exposed peaks of one of the corrugated layers, and means to apply a liner web to the corrugated layer.

Abstract: A corrugated paperboard strength enhancing process includes at least one resin application station located within the confines of the corrugator at a position where it is operable to apply a preselected amount of strength enhancing resin to at least one side of the medium after it has been fluted and most preferably before adhesive has been applied to the medium for securing liner paper thereto. At least one liner is adhered to the set of opposed flute tips. Thereafter the combined board with the resin compound on selected transverse portions of the fluted medium is allowed to cure, under selected temperature and moisture conditions and without the application of pressure that would crush the fluted medium. A suitable resin for the intended purpose is an isocyanate compound. The strength-enhanced corrugated paperboard can be efficiently repulped.

Abstract: The invention relates to honeycomb core components having an undulating configuration reinforced with structural rods or columns which provide nesting sites for indexing with the flutes or nodes of adjacent components when assembled in stacked relation. Methods are also disclosed for producing the core components and assembling them in finished honeycomb core configuration.

Abstract: A method of making a composite structure from two first sheets of a natural fibre material such as paper and a second corrugated sheet of a natural fibre material such as paper, the second sheet being sandwiched between the two first sheets, includes the steps of impregnating the sheets with a liquid composition comprising a thermosetting resin such as a phenolic resin, an extending liquid for the thermosetting resin and a catalyst for the thermosetting resin, locating the second sheet between the two first sheets and polymerising the thermosetting resin to join the second sheet to the two first sheets to form the composite structure. The composite structure is of use in the building and packaging industry.

Abstract: A heat transfer system particularly though not exclusively for assisting the bonding of a continuous liner sheet to a single faced board in a corrugating machine where the single faced board (10), after gluing of the corrugated tips is brought together with the liner (12) and conveyed across a series of hot plates (15), the invention consisting of a series of vessels (20) containing a liquid or gas arranged above the conveyed board to press same uniformly in contact with the hot plate surface irrespective of distortion or undulation thereof thus to ensure adequate heat transfer and avoid damage to the board.

Abstract: A contact bar for slidably contacting the liner of a single-faced corrugated paperboard sheet to press the flute tips of the sheet against a rotating glue roll without crushing the flute tips. The contact bar includes an elongate frame mounted opposite and in spaced-apart relation from the rotating glue roll. A series of shoes are pivotally connected to the frame and depend therefrom defining a predetermined clearance from the outer surface of the rotating glue roll. The shoes are biased by springs to cause the shoes to slidably contact the liner and press the flute tips against the rotating glue roll. The shoes may be formed of cold-rolled steel providing a reasonably long expected service life and also having an abrasion resistance so that conformance of the shoe contact surfaces with the rotating glue roll and a single-faced sheet occurs in a relatively short time caused by abrasion with the slidably contacting single-faced sheet.

Abstract: A composite extensible material useful for making a clothing article comprising a first film layer resistant to penetration by liquid water by permeable to water vapor adhered at discrete securement locations to a second layer of water vapor vapor permeable extensible sheet material. The adherence between the two layers is such that when the composite material is under zero stretching load and resting on a flat surface the second layer is substantially flat and the first layer is corrugated, ruched or puckered. The adherence is also such that the composite material can be stretched by at least 10% in at least one direction by a load less than that required to stretch the first layer by the same amount on its own.

Abstract: The disclosure relates to a packing for a column in the shape of a cylindrical stack of corrugated plates of glass wherein the corrugated plates are held together either by a strap tightened around the stack or by being bonded together at the points of intersection of the corrugated plates.

Abstract: For the corrugated deformation of a flat sheet of material, an upper row (2) of shaping tools (4) is pressed against a lower row (3) of shaping tools (5). The shaping tools of both the rows are, with that, also simultaneously pushed together so that they trace the shortening of the sheet of material during the deformation. Thus, the situation is achieved where no relative displacement between the sheet of material and the facing sides (6, 6') of the shaping tools (4 and 5) takes place, also in the case of numerous corrugations of relatively great height. The lower row of shaping tools is arranged on a rotor, whilst the upper row is fixed at a working station within the area of rotation of the rotor.

Abstract: A heater for a double facing apparatus includes a flat metal plate where channels are drilled through end faces of the plate. Slots are provided at the end faces of the plate to interconnect pairs of adjacent channels at alternate ends to form a serpentine steam passage through the plate. The channels are positioned through the plate proximate to the upper surface of the plate, to define a thin web of plate material between the channel and the upper surface and a thick web of material between the channel and the lower surface of the plate. End caps are welded over the slots to seal the communication between the adjacent interconnected pair of channels. Steam supply ports extend into the serpentine path to steam pressurize the serpentine passage. Air vents can be supplied between some adjacent channels of the heater, extending between an upper and a lower surface of the plate.

Abstract: Three metal foils are simultaneously fed in opposing relationship through a machine which automatically fabricates a sheet metal sandwich structure therefrom. The foils are first tensioned in aligned opposing relationship. The center sheet is then fed through a pair of free floating gear shaped corrugator tools which form corrugations or undulations therein. Adhesive is then applied to the inner surfaces of the two outer foils and the three foils passed through a pair of drums which press the foils together between opposing metal bands and provide uniform heat thereto through the bands to effect curing of the adhesive. The foils are further pressed together between the bands by means of air diaphragms or bladders which provide hydraulically controlled clamping force thereto. Finally, the sandwich structure thus formed is trimmed and cut to form boards of the desired width and length.

Abstract: An apparatus and method are disclosed for securing elastic to a flexible backing for use in catamenial pads. The apparatus includes means for feeding the backing sheet onto a first drum having a plurality of surface grooves formed therein. The backing sheet is pulled into each of the grooves such as by a vacuum. A strip of elastic is then placed across each of the grooves and anchored at its respective ends. The backing sheet is then drawn off of the drum and extended so that the elastic is stretched to overlay the backing sheet. The apparatus further includes means for adhering portions of the elastic intermediate the anchored ends to the backing sheet while the elastic is in its extended position. The method for applying the elastic material to the backing sheet uses the apparatus discussed above.

Abstract: The device of the invention for introducing liquid composition into the pipes of corrugated cardboard sheets comprises at least one guide bar (3) having a guiding slot (4) for the top edges of the sheets being conveyed below the guide bar. Knives (8) are provided near the bottom edges of the slot. To cut loose narrow top edge areas of the exterior walls of the corrugated cardboard sheets from the adjacent pipe walls the edge areas constituting seals against the side walls of the slot exteriorly of the knives. Injector nozzles (13) open into the slot bottom for injecting composition into the pipes of the corrugated cardboard sheets. The vertical distance between the bottom of the guide bar slot and the conveyor is adjustable. The injectors are connected into a composition circulation circuit.

Abstract: Preparation of laminated corrugated material at the dry end of a corrugating line, and products so formed. Processes of the present invention laminate one or more finish layers of paper, thermoplastic, metal, foil, cloth, film or other thin material of any required width to suit a customer's needs, preferably between the rotary shear and the slitter/scorer station. The finish layers may be single layer or composite material and are preferably, but not necessarily preprinted, reverse printed, etched or otherwise the recipient of graphic images prior to the corrugation operation. The finish layers may be produced, supplied and run in any desired width to suit a customer's needs, without the need to engage in the planning, expense and scheduling necessary to run an entire full width roll of preprint material as single face or double face liner on the corrugator, and without the problems inherent in applying graphics to containers or cartons during the conversion process.

Abstract: A contact bar for slidably contacting the liner of a single-faced corrugated paperboard sheet to press the flute tips of the sheet against a rotating glue roll without crushing the flute tips. The contact bar includes an elongate frame mounted opposite and in spaced-apart relation from the rotating glue roll. A series of shoes are pivotally connected to the frame and depend therefrom defining a predetermined clearance from the outer surface of the rotating glue roll. The shoes are biased by springs to cause the shoes to slidably contact the liner and press the flute tips against the rotating glue roll. The shoes may be formed of cold-rolled steel providing a reasonably long expected service life and also having an abrasion resistance so that conformance of the shoe contact surfaces with the rotating glue roll and a single-faced sheet occurs in a relatively short time caused by abrasion with the slidably contacting single-faced sheet.

Abstract: A mechanism for adjusting a distance between a glue machine and an introducing port of a heating port in a double facer corrugating machine is provided for the purpose of optimizing a penetrated amount of applied paste into a core paper sheet to insure a sticking force between a single-faced corrugated cardboard sheet and a liner. The distance adjusting mechanism includes guide rails and traveling wheels provided in the glue machine and running along the guide rails. In one aspect of the invention, the glue machine is adjustably moved along the guide rails by means of a hydraulic cylinder connected between the glue machine and a stationary frame, and in another aspect of the invention, the glue machine is adjustably driven along the guide rails by means of an electric motor mounted to the glue machine for driving the traveling wheels.

Abstract: A corrugated cardboard producing machine has a preheater for heating a corrugated cardboard sheet of original paper or single face type corrugatd cardboard sheet in each of various processing stages for producing a corrugated cardboard by bonding a liner paper onto a corrugated central core paper. The preheater is provided with a lap amount adjusting tool whose insertion amount between a circumference of a roll of the preheater and the original paper or the single face type corrugated cardboard is adjustable. The lap amount adjusting tool is movable along the circumference of the roll of the preheater.

Abstract: A method for forming a disposable absorbent article having portions which are elastically extensible in at least the cross-machine direction.