Abstract: A machine for manufacturing corrugated board including one or more flexible, disposable covers for the pressure-applying feet of the machine. The covers prevent wear and tear to the bottoms of the pressure-applying feet and may be easily replaced, as needed. In a belt-driven machine, the disposable covers may be located between the pressure-applying feet and the conveyor belt. In a machine with a beltless hotplate section, the conveyor belt is replaced by a pulling section located downstream from the hotplate section and the disposable covers may be located between the pressure-applying feet and the moving surface. The covers allow the thickness of the corrugated board to be varied while the board is moving through the machine without causing the leading edge of an added layer to catch on the upstream edges of the pressure-applying feet. In addition, the covers and/or the pressure applicators may be moved in the cross-machine direction to minimize waste when manufacturing different widths of corrugated board.

Abstract: The present invention is directed to an apparatus and method for applying variable pressure to a surface. The apparatus includes a frame secured to a fixed structure and located proximate to the surface. The frame is in movable relation with a pressure applicator in a direction substantially perpendicular to the surface. The pressure applicator is connected to a pressure source. The pressure applicator contacts the surface. A mechanical compensator is mounted integrally with the pressure applicator to enable the pressure applicator to compensate for any variations in the contour of the surface. The present invention also includes a control device for varying the pressure supplied to the pressure applicator that is ultimately applied to the surface.

Abstract: Method and apparatus for manufacturing corrugated board comprising two layers of corrugated medium joined together in tip-to-tip registration of the two mediums, without an intermediate liner, and with at least one outer liner. Adhesive is applied to the tips of the two mediums, and the tips are brought together and held in contact with each other while the adhesive sets at least partially during conveyance of the mediums along a linear path.

Abstract: A corrugating machine for producing single-faced or double-faced corrugated board which utilizes a thermal sensing system to determine the length of the web in the bridge instead of an ink-based sensing system. The corrugating machine includes means for supplying a first paper web, means for corrugating a second paper web to produce a corrugated paper web, and means for adhering the first paper web to the corrugated paper web to form a single-faced corrugated web. The corrugating machine has a splicer for splicing one of the paper webs at a splice point, means for applying a liquid spot, such as water, to one of the paper webs, and means for thermally detecting the liquid spot after the liquid spot is applied, such as a temperature detector. The corrugating machine determines the length of the single-faced corrugated web based upon when the liquid spot is applied by the applying means and when the liquid spot is thermally detected by the detecting means.

Abstract: The invention relates to an improved method and apparatus for producing paper board structures wherein two corrugated mediums are bonded together at their flute tips. End gears (16a, 16b, 15a, 15b) are provided, at least, on the ends of the corrugating rolls (4,6), which are non-meshing with each other and which assist in aligning the corrugated mediums in tip to tip arrangement and provide precise tip to tip bonding of the mediums. The end gears may be abutting or non abutting and may be provided on both ends of the corrugating rolls, which assist in aligning the mediums to obtain precise tip to tip bonding.

Abstract: A heating unit for a corrugated board manufacturing plant comprises heating elements which consist of a comparatively thin heating plate and a supporting structure disposed at a distance from, and below, the latter. The heating plate is supported on the supporting structure by thermally insulating props. Furthermore, a heat insulation layer is disposed between the respective heating plate and the supporting structure.

Abstract: An improved corrugated board manufacturing apparatus and method including precise web moisture and temperature control is disclosed. The apparatus includes steam driven manifolds for zone drying of the web using pressurized steam to reduce moisture and equalize the moisture content across the web. Moisture sensors and temperature sensors are implemented to scan the web and provide feedback information regarding web moisture and temperature. Wrap arm position is automatically controlled to obtain ideal web temperatures for corrugated board production. Web speed and take-up ratios are monitored to determine when process parameters are out of limits which may cause waste. An improved hot plate section including variable pressure applied to the web as well as variable steam supplied to the hot plates results in a more effective process control loop in achieving and maintaining web temperature for curing the adhesive and preventing warping.

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. Ballast system control based on monitored web moisture content and web temperature is disclosed.

Abstract: An adhesive or other viscous liquid applicator apparatus utilizes a cylindrical glue roll and a reverse acting notched metering or doctor blade which forms, from an initial liquid layer on the roll, a series of laterally spaced liquid beads of metered size. The beads are subsequently spread to form a liquid layer for transfer to a web or other surface moved into generally tangential contact with the roll. The beads are preferably spread by a flexible spreader blade, but may also be spread by operating the peripheral surface of the roll and the web or surface in contact therewith at different speeds. The notched doctor blade provides accurate metering with a mechanically simple apparatus and the formation of beads helps prevent premature drying of the liquid.

Abstract: An apparatus and method for applying variable pressure to a surface. The apparatus includes a frame secured to a fixed structure and located proximate to the surface. A foot is mounted for movable relation relative to the frame in a direction substantially perpendicular to the surface. The pressure applicator is connected to a pressure device which biases the applicator away from the surface. The present invention also includes a variable pressure source connected to a control device for varying the pressure supplied to the pressure applicator that is ultimately applied to the surface.

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 double backer for curing the web bonding adhesive and drying the corrugated paperboard web utilizes a web holddown apparatus for maintaining the web in intimate drying contact with the lower heating units which does not require the use of a driven holddown belt. The holddown is provided instead by a series of parallel, flexible, closely spaced strips suspended above the web in the heating section and extending in the direction of web travel. By adjusting the supports to which the ends of the strips are attached, the portions of the lengths of the strips maintained in contact with the web may be varied. The holddown strips may be provided with strip supporting air bearings which also help dissipate moisture and heat. The web is pulled through the double backer by a downstream vacuum conveyor section comprising a series of transport belts to the upper surfaces of which a vacuum is applied and which may also be supported by air bearings to reduce friction and drive power requirements.

Abstract: A hot plate for a double facer used in the manufacture of corrugated paperboard includes a substantially all copper construction which enhances thermal conductivity and heat transfer efficiency. Steam for heating the plates is provided through an array of copper tubes extending between manifolds on opposite sides of the hot plate, all in a manner which obviates the need for heavy pressure vessel construction. The hot plate is allowed to float on its supporting frame in a manner which accommodates lateral thermal expansion, and the lateral ends are tied vertically to the supporting frame to prevent thermal bowing characteristic of prior art systems.

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 hot plate for a double racer used in the manufacture of corrugated paperboard includes a substantially all copper construction which enhances thermal conductivity and heat transfer efficiency. Steam for heating the plates is provided through an array of copper tubes extending between manifolds on opposite sides of the hot plate, all in a manner which obviates the need for heavy pressure vessel construction. The hot plate is allowed to float on its supporting frame in a manner which accommodates lateral thermal expansion, and the lateral ends are tied vertically to the supporting frame to prevent thermal bowing characteristic of prior art systems. The heating system is also applicable to a rotary preheating drum where the same benefits of thermal conductivity and heat transfer efficiency are attained.

Abstract: A method and apparatus are disclosed for affixing a fastener to the garment side of an absorbent article having a profiled shape, especially an absorbent article that is thicker in the center than at the ends. The-method involves placing a fastener with its pressure sensitive adhesive surface adjacent the garment side of the absorbent article, and applying pressure to adhere the pressure sensitive adhesive surface to the garment side of the absorbent article while the absorbent article and the fastener are between a compressible component and an anvil surface. The apparatus comprises a compressible component comprising a surface with a plurality of compressible, resilient elements projecting therefrom in a direction toward an anvil surface.

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: 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: Disclosed is a method and an apparatus for efficiently and economically producing printed matter having a high degree of gloss, rub-resistance, water-resistance and resistance to contamination. In this method and apparatus, a web-fed printed matter or a web-fed printing paper is coated with a coating agent for roll press working and subjected to hot roll press working while in the state of a web.

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: An improved idler roll is disclosed including a longitudinal cylinder having tubular walls sealed at the ends by flanged stub shafts. The interior of the idler roll is filled with ethylene glycol. The idler roll can be placed into rolling abutment with a heated surface, and when the idler roll is stopped for a period of time, the thermal distortion along the longitudinal length of the idler roll is minimal. When the idler roll is once again started, the fluid in the idler roll causes a forced convection heat transfer, evenly distributing the temperature of the idler roll, and thereby eliminating the thermal distortion.

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: Fiber-reinforced thermoplastic honeycomb is prepared in a continuous manner one half cell at a time by laying down a corrugated web of thermoplastic, with and without fiber-reinforcement atop a honeycomb, selectively fusing the node-antinode demes and repeating the process until a honeycomb of the desired depth is prepared.

Abstract: The present invention relates to an apparatus and a process for applying at least one adhesive component to a honeycomb half-cell structure. The half-cell structure has a plurality of peaks and valleys on each side thereof and a diagonal surface between each consecutive peak and valley. The apparatus comprises a first and second back-up roll and a first and second gravure roll. The first and second gravure rolls are disposed in a bath of a first adhesive component and a second adhesive component, respectively. Each of the first and second back-up rolls includes a plurality of spaced bars. The peaks of the half-cell structure face away from the bars of each respective back-up roll, and the peaks on the other side of the half-cell structure contact each respective first and second gravure roll, so that the first adhesive component contacts the peaks on the one side and the second adhesive component contacts the peaks to apply the first and second adhesive components to the half-cell structure.

Abstract: An improved triple wall corrugated paper board fold construction is formed by joining a single face web with a nonadhered band of the medium to a contiguous liner of another one of the single face webs, slitting and removing a portion of the nonadhered band along a narrow bending area, and removing the slit strip to leave a bending groove formed with one or more score lines in the material underlying the groove, as the board continuously moves along a path of travel.

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 sheet of coated abrasive material including a backing having abrasive on one surface and loops projecting from its other surface by which the sheet of coated abrasive material can be held by hooks on the support surface of a pad. The backing comprises a polymeric bonding layer defining its rear surface. The sheet of coated abrasive material comprises a nonwoven sheet of longitudinally oriented fibers having anchor portions bonded in the polymeric bonding layer at spaced bonding locations, and arcuate portions projecting from the rear surface of the backing between the bonding locations to provide the loops.

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: Honeycomb materials having areas or volumes possessing different physical properties then the remainder of the honeycomb are prepared in a continuous process without requiring machining operations.

Abstract: A corrugation machine includes a woven papermakers fabric. The fabric has at least four layers of bulky yarns interwoven with monofilament yarns. The yarns and weave patterns are selected such that the fabric has a caliper of at least 0.2 inches, a weight of between 10 to 15 ounces per square foot and a permeability of at least 25 CFM.

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: 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: A pleating machine for dual fluted shades consisting of a pair of cooperating sets of pleating conveyors closely adjacent and flanking a sealing device that joins the two resulting pleated webs together by transversely fed attaching sheets.

Abstract: Fiber-reinforced thermoplastic honeycomb is prepared in a continuous manner one half cell at a time by laying down a corrugated web of thermoplastic, with and without fiber-reinforcement atop a honeycomb, selectively fusing the node-antinode demes and repeating the process until a honeycomb of the desired depth is prepared.

Abstract: A nested fiberglass structure (10) comprises a plurality of strips (66) each in the shape of a sinusoidal wave (20). The waves (20) have peaks (22) and valleys (24) which have equal amplitudes about a central axis (26). A positioning string (32) is placed over the peaks (22) and into the valleys (24) to provide a guide for the depth of penetration of adjacent strips during nesting of the strips (66). The structure (10) may be formed on an apparatus for manufacturing (46) which forms a continuous web (48) into the strips (66) and nests the strips (66) into the structure (10). The structure (10) may then be wound onto a reel (154) for fabrication into a cylindrical structure (34). The apparatus (136) spirally winds the nested structure (10) around a mandrel (182) to form the cylindrical structure (34).

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: Disclosed is a single facer having a first fluted roll unit consisting of a pair of radially outer and radially inner rolls, a second fluted roll unit also consisting of a pair of similar radially outer and radially inner rolls, and a press roll, wherein the press roll is designed to be selectively operated in combination with either one of the two fluted roll units before the forming operation is started; characterized in that the first fluted roll unit is disposed at a predetermined angle with respect to a vertical plane above the press roll and the second fluted roll unit is disposed vertically below the press roll; and flutes formed upon the surfaces of the radially outer and radially inner rolls of the second fluted roll unit are designed to be smaller than the flutes formed upon the surfaces of the radially outer and radially inner rolls of the first fluted roll unit.

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: Fluted roller for a single face corrugator comprising grooves extending around the periphery thereof, the bottom of the grooves being deeper than the bottoms of the corrugation of the fluted roller, wherein the grooves extend at an angle unlike 90.degree. to a surface line of the roller running parallel to the axis thereof.

Abstract: A self-correcting web registration system achieves web shortening by pleating the web with a grooved crease roller. The web passes through a nip between the crease roller and an opposing drive roller which has an elastomeric cover. When web shortening is required and the web is being pleated by the crease roller, the opposing elastomeric roller is overdriven with respect to the normal advancement rate of the web. Further web shortening may be achieved by selectively increasing pressure between the crease roller and the elastomeric drive roller which causes the pleats in the web to become deeper. The crease roller may be used in conjunction with a tension roller which can be selectively engaged to stretch the web and achieve lengthening. Both rollers may be mounted in a single chassis which pivots relative to a frame-mounted drive roller. This provides selective engagement of either the tension or crease roller, depending upon the position of the chassis.

Abstract: A pasting machine in a corrugator which is arranged downstream of at least one single face corrugated cardboard machine and the heating section thereof including hot plates along which the webs to be glued to each other and being arranged on top of each other are guided while being compressed by pressing means being directed towards the hot plates from above, wherein the heating section is divided into at least two sections being arranged in spaced relation to each other in working direction, a glue station is arranged in the intermediate space between the hot plate sections and feeding means for a web being associated with the intermediate space are provided below the working level of the pasting machine.

Abstract: Pressure rollers are carried on respective shafts which are slidable in slotted plates towards and away from a machine centreline to define a gap. Measuring means are provided for determining the position of each roller, in the form of a contact probe mounted on each end of each shaft with the probes at either end bearing on opposite faces of a plate of known thickness centred on the machine centreline.

Abstract: A corrugation machine includes a woven papermakers fabric. The fabric has at least four layers of bulky yarns interwoven with monofilament yarns. The yarns and weave patterns are selected such that the fabric has a caliper of at least 0.2 inches, a weight of between 10 to 15 ounces per square foot and a permability of at least 25 CFM.

Abstract: A press roll elevator in a double facer is disclosed including press roll groups each having a plurality of press rolls for a corrugated cardboard sheet traveling in a first direction through the double facer. The press rolls are rotatably supported between tip end portions of respective pairs of arms which swing in the sheet's direction of travel about fulcrum shafts mounted on both side frames of the double facer. The fulcrum shafts are disposed at intervals along the sheet's direction of travel, and the press rolls are elevated and lowered by swing motion of the respective pairs of arms. Common rails reciprocated along the sheet's direction of travel and having protrusions extending therefrom abut against the respective arms causing the swing motion.

Abstract: The absorbent laminated sheet is composed of at least two plies (1.9), embossed, constituted essentially of cellulose fibers, bonded together at least partially by means of protruding elements relative to the surface of said plies and pointing inward to the sheet; it is characterized in that the protruding elements (101) are positioned essentially according to lines or combinations of lines reproducing spaced motifs (100), which recur indefinitely.Application as domestic or sanitary paper.

Abstract: A composite expanded web for making a cigarette wrapper is provided, the web comprising a laminate of a first web of generally flat sheet material and a second web of expanded sheet material. The expanded web is formed by passing a web of sheet material through rotary shearing and forming dies to impart to the web a configuration having longitudinally disposed rows of generally sinusoidal convolutions extending above and below the original plane of the web, each row of convolutions lying 180.degree. out of phase from its abutting rows. The composite web is formed into a wrapper for a smoking article by curling it about its longitudinal axis, securing the overlapping edges of the first web with a glue seam, and cutting it to the desired length.