Abstract: In some illustrative embodiments of the present invention, a novel expandable slit paper expansion device design is provided that, among other things, avoid complications of prior systems and eliminates the crushing effect of the rollers. Among other things, the preferred embodiments provide a unique structure that provides a novel “S” shape path of the expandable slit sheet paper, such that the expandable slit sheet paper is tortuously weaved between at least two expansion rollers without being compressed there-between, in a manner that the expandable slit sheet paper follows along surfaces of the expansion rollers without pinching or compression that occurs in the background art.

Abstract: A method for producing a shaped profile section in a continuous line process provides providing an outer facing web, an inner facing web and laying down an liquid foam reactants in the outer facing web. The method pre-forms the outer facing web into a desired outer profile shape prior to laying down the liquid foam reactants. The inner facing web is shaped with the liquid foam reactants within the pre-formed outer facing web to provide a desired inner profile shape for the shaped profile section. Also provided is an apparatus for producing a shaped profile section and a shaped profile section of the method.

Abstract: A system and method for producing a board product made from paper products that have a pre-scored facing in addition to a medium (sometimes called fluting). Conventional corrugated board may feature a cross-corrugated medium and one or more facing that have no score lines that are impressed (at least prior to assembly with the corrugated medium). Such a conventional board product may be inferior because any score lines that are impressed will damage the underlying corrugated medium in some manner. A breakdown in the strength of the underlying medium leads to poor precision when the eventual board product is scored, cut, and folded. A lack of precision in folding a board product leads to gap variation and fishtailing as any articulated portion of the board product may not maintain a precise plane of articulation when folded.

Abstract: The noodle cutter is installed on a common noodle making apparatus. The noodle cutter enables the noodle making apparatus to manufacture noodles which have various three-dimensional shapes, and various sizes. Accordingly, a person can hold the noodles in the three-dimensional shape more easily with chopsticks. The noodles cut by the noodle cutter have embossed surfaces, thereby providing unique shapes that stimulate appetite, differentiated texture, and further enhancing the flavor of noodles. The noodle cutter comprises: rotation shafts (10,11) arranged in parallel with each other and driven by a motor; a first roller (20) and a second roller (21) provided on the outer peripheral surface of the rotation shafts (10, 11) in the form of a cylinder and driven to rotate in close contact with each other; and a molding groove (30) depressed inwardly along the outer peripheral surface of the first roller (20) and the second roller (21).

Abstract: Disclosed is a single facer which comprises: a cartridge pivotally supporting a pair of corrugating rolls by a side plate; two cartridges pivotally supporting a pair of corrugating rolls by a side plate, respectively; a single facer body housing the two cartridges in a movable manner so as to exchange respective setup positions of the two cartridges between the in-use position and the rest position; and a hydraulic jack disposed just below the stacked cartridges in a vertical direction and configured to push the stacked cartridges upwardly, wherein, by pushing the stacked cartridges upwardly by the hydraulic jack, the single facer is operable to press an upper end of the side plate of the upper cartridge against a lower end of a ceiling member of the single facer body, so as to clamp the stacked cartridges by the hydraulic jack and the ceiling member of the single facer body.

Abstract: An apparatus is provided for producing longitudinally corrugated product. The apparatus includes a guide roll for guiding a web of medium material, wherein at least a portion of the guide roll is adapted to be arranged at an angle relative to another portion of the guide roll. The apparatus further includes a plurality of flute forming bars oriented generally along a longitudinal axis of the web to define a first corrugating labyrinth effective to longitudinally corrugate the web to an intermediate geometry. The apparatus further includes a pair of corrugating rollers that cooperate to define, at a nip therebetween, a second corrugating labyrinth effective to longitudinally corrugate the web to a substantially final geometry. The apparatus further includes a web travel pathway for the web that follows a path around a portion of the guide roll, through the first corrugating labyrinth, and through the second corrugating labyrinth.

Abstract: The invention relates to a method and apparatus for fibrillating synthetic ribbons in an extrusion process for the production of, for example, grass fibers. The extrusion process creates a sheet of ribbons from an extruded foil or a multiplicity of extruded monofils, and stretches them conjointly. The ribbons are led side by side in a parallel arrangement along the circumference of a fibrillating roll with a partial wrap. To produce a pattern of fibrillation irrespective of the thickness of the ribbons and the elasticity of the ribbons, the invention provides that a multiplicity of short partial cuts is made in the ribbons by a plurality of successively engaging rows of blades on the fibrillating roll each having a multiplicity of projecting cutting tips.

Abstract: Disclosed is a single facer for producing a plurality of types of single-faced corrugated paperboard sheets having different flute configurations. The single facer of the present invention comprises: a plurality of corrugating roll pairs; a plurality of cartridges each pivotally supporting a pair of corrugating rolls arranged in an up-down direction in a respective one of the corrugating roll pairs, each of the cartridges being selectively serving as an operational cartridge supporting one of the corrugating roll pairs located in an operational position, and a rest cartridge supporting one of the corrugating roll pairs located in a rest position; and a single facer body having a frame structure internally formed with a transfer space for the cartridges, wherein the operational cartridge is disposed above the rest cartridge in such a manner that the operational cartridge is supported from therebelow by the rest cartridge.

Abstract: A device for producing pipes made of thermoplastic with annular transverse profilings with a cross section in the form of undulation peaks and undulation troughs has half-molds, which complete one another pairwise along a straight mold section to form a closed mold, which can be moved in a movement direction. Projecting into the mold is an extrusion tool, which has a nozzle support body. To produce an adequate seal between the half-molds and nozzle support body, the latter is covered with exchangeably attached hollow half-shells, which form a cylindrical external face.

Abstract: A forming apparatus for forming a formable material. Each forming tool of a second forming tool set is adapted to co-act with one or more forming tools of a first forming tool set, or vice versa, to form a co-acting forming tool in a pressure forming zone. There is a first forming tool set guide or guides about which the first forming tool set can be moved about a first circuit. There is also a second forming tool set guide or guides about which the second forming tool set can be moved about a second circuit. A drive drives the tools in a machine direction. At least on part of the circuit, adjacent forming tools of one the forming tool sets are movably supported such that the only relative movement of the adjacent forming tools is towards or away from the forming tools of the other forming tool set.

Abstract: An apparatus for the continuous production of a twin wall pipe has mold block halves supplied in pairs to form a mold, and a pipe head, which has an external nozzle for the extrusion of an external hose and an internal nozzle for the extrusion of an internal hose. A support air and venting channel which is annular-cylindrical and concentric with respect to the center longitudinal axis of the pipe head opens out between the external nozzle and internal nozzle.

Abstract: An apparatus for producing thermoplastic corrugated pipes may include an extrusion device with an extruder and an extrusion die device and a corrugator device with traveling mold jaws. The extrusion device and the corrugator device are positionally movable in relation to one another, for example for adjustment. The extrusion device is positionally movable in relation to the corrugator device in a horizontal plane, while the corrugator device is movable exclusively in height here.

Abstract: An embossing system is provided for embossing at least a portion of a web comprising a first roll and at least a second roll. The first roll and second roll may define a first nip for embossing the web. At least one of the first roll and the second roll has elongated embossing elements extending substantially in the machine direction and optionally at least one of the first and second rolls has elongated embossing elements extending substantially in the cross-machine direction. At least one of the first roll and the second roll may also have perforate embossing elements extending substantially in the cross-machine direction that may or may not be elongated. The embossing elements are capable of imparting one or both of a cube embossing pattern or a perforate emboss on the web. The web may be a cellulosic fibrous web, a portion of which is lignin-rich, high coarseness fiber having generally tubular fiber configuration. In addition, the web may be creped with an undulatory creping blade.

Abstract: For producing a creped material, especially a sealing material for connections and transitions on buildings, with this material being provided with crepe folds, wherein the crepe folds run in different directions, a method is disclosed with the steps of: a) preparing a deformable material web (9) with a main expansion direction (90); b1) forming a longitudinal profile (91) in at least one region of the deformable material web (9), wherein the longitudinal profile runs essentially parallel to the main expansion direction (90); c) forming a transverse profile (94) in at least one region of the deformable material web (9), wherein the transverse profile (94) runs at an angle other than 180° relative to the main expansion direction (90); and d) pressing at least one section of the deformable material web (9) that has at least one region with a longitudinal profile (91) and a transverse profile (94), so that the material web (9) is provided with the crepe folds.

Abstract: A system is disclosed for manufacturing multi-wall corrugated polymer pipe. The system includes an extruder configured to co-extrude concentric annular tubes; a corrugator configured to form the concentric annular tubes into a dual-wall pipe having a smooth wall and a corrugated wall; a cross-head die configured to extrude an outer wall of pipe onto the corrugated wall of the dual-wall pipe; a vacuum punch configured to penetrate the outer wall of pipe and draw a vacuum between the corrugated wall and the outer wall, such that the outer wall of pipe deforms inward toward the corrugated wall of pipe between bell and spigot portions of the corrugated wall; and a cutter configured to cut the pipe into sections where the vacuum punch deformed the outer wall between the bell and spigot portions of the corrugated wall. A method of manufacturing multi-wall corrugated polymer pipe is also disclosed.

Abstract: A corrugating roller pair support frame includes four supporting posts, in between two of which one rectangular supporting plate of a corrugating roller pair is mounted while another rectangular supporting plate is mounted in between the other two supporting posts, and the four supporting posts having a plurality of locating blocks movably embedded therein for releasably engaging with locating slots formed on the rectangular supporting plates to thereby releasably hold the corrugating roller pair to the support frame; and a supporting elevator for supporting and regulating the corrugating roller pair to a desired height on the support frame. With these arrangements, the corrugating roller pair can be conveniently mounted to or released from the support frame and be easily exchanged with another one, so that the time needed for handling the corrugating roller pair is shortened and the efficiency of manufacturing corrugated boards is upgraded.

Abstract: A corrugator device for shaping thermoplastic corrugated pipes from a tube of molten plastics material emerging from an extrusion device may include molding jaws, grippers for returning the molding jaws from the end of a molding section to the start of the molding section, and a mold release device. The mold release device is arranged at the end of the molding section, and has a motor-driven rotary disk for interacting with the pair of molding jaws. The pair of molding jaws, which has reached the end of the molding sections, is moved apart by means of first and second drivers formed on the motor driven rotary disk.

Abstract: A corrugator device for shaping thermoplastic corrugated pipes out of a molten plastic tube issuing from an extrusion device may include moving molding jaws which circulate in a linear molding section and are arranged in paired successive relationship in the molding section forming a molding passage. The pairs of molding jaws may be formed from left-hand and right-hand molding jaws and between them enclose a cylindrical mold cavity to form the molding passage. The device may include a gripper device for guiding the molding jaws from the end of the molding section back to the start of the molding section, and having grippers respectively for the left-hand and the right-hand molding jaws, each with a separate guide and drive device.

Abstract: The present invention relates to apparatus for fibrillating ribbons or foils, wherein two or more strips each having a plurality of projecting fibrillating elements are disposed on the circumference of a fibrillating roll in a uniform distribution. To ensure gentle guidance of the ribbons and foils during fibrillation, the regions on the fibrillating roll between the circumferential strips each exhibit a friction-reducing surface contact.

Abstract: A manufacturing method for an absorptive article includes a sheet-stretching step of performing a stretching process to stretch a continuous body of the exterior sheet in a widthwise direction while conveying a continuous body. In the step of performing the stretching process, the continuous body is stretched by a stretching apparatus including a first roll and a second roll. An axial core of the first roll and an axial core of the second roll are correspond to the widthwise direction of the continuous body. The first roll and the second roll have surfaces each provided with columns of tooth units and untoothed units.

Abstract: Methods and apparatuses for deforming a web are disclosed. In one embodiment, the method involves feeding a web into a nip that is formed between at least two intermeshing rolls. The rolls are configured for deforming a web with at least two sets of deformations that are oriented in different directions relative to the surfaces of the web.

Abstract: Apparatuses for forming discrete deformations in web materials are disclosed. The apparatus may be in the form of nested or other arrangements of multiple rolls, in which the web is maintained in substantial contact with at least one of the rolls throughout the process, and at least two of the rolls define two or more nips thereon with other rolls. In some embodiments, rolls can be used to expose a different side of the web for a subsequent deformation step. In these or other embodiments, the rolls can be used to transfer the web between rolls in such a manner that it may offset the rolls and/or web so that subsequent deformations are formed at a different cross-machine direction location than prior deformations.

Abstract: In the production of reinforcing elements for strengthening the excavation face of a tunnel, a fiberglass profile comprises an axially extending body formed by glass fibers anchored in a polymer resin through a polymerization process. The outer surface of this profile has a corrugated shape with respect to an axial cross-sectional plane of the profile. This corrugated trend is defined by a different degree of compression of the outermost glass fibers of the profile, made by a substantially thread-like element.

Abstract: An apparatus for embossing a fibrous structure is disclosed. The apparatus has a pattern roll and a patterned embossing belt. The pattern roll has a surface comprising a first pattern of protrusions and recesses The patterned embossing belt has a second pattern of protrusions and recesses. The first pattern of protrusions and recesses and the second pattern of protrusions and recesses are complementary. The pattern roll and the patterned embossing belt are matingly engageable to provide a lateral clearance, LC, greater than about 75 ?m and a depth of mesh, DW, greater than about 254 ?m.

Abstract: An embossing system is provided for embossing at least a portion of a web comprising a first roll and at least a second roll. The first roll and second roll may define a first nip for embossing the web. At least one of the first roll and the second roll has elongated embossing elements extending substantially in the machine direction and optionally at least one of the first and second rolls has elongated embossing elements extending substantially in the cross-machine direction. At least one of the first roll and the second roll may also have perforate embossing elements extending substantially in the cross-machine direction that may or may not be elongated. The embossing elements are capable of imparting one or both of a cube embossing pattern or a perforate emboss on the web. In addition, the web may be creped with an undulatory creping blade.

Abstract: The invention under consideration concerns a device for the production of corrugated pipes made of thermoplastic, in which mold jaws, which complement each other in pairs, are conducted jointly in a cycle along a mold section that leads away from an extruder head; they are moved apart at the end of the mold section and are returned to its beginning separately from one another with a mold section device for the movement of the mold jaws along the mold section, which has a supporting table with drive means for the mold jaws on the mold section, and with a return conveying device for the return conveyance of the mold jaws from the end of the mold section to its beginning, which has an outlet assembly to move apart the mold jaws at the end of the mold section and/or an inlet assembly to move in the mold jaws at the beginning of the mold section.

Abstract: The invention relates to methods for simultaneously producing crimped fibre strips in parallel, in particular filter tow strips, in a crimping machine (KM) having an inlet region (3), a squeezing zone (6) formed between two transport rollers (4, 5), and a compression channel (7), comprising the following steps: a) simultaneously feeding in parallel a plurality of fibre strips (1, 2) via the inlet region (3), wherein the fibre strips are guided separately in the inlet region (3), using a first separating device (31), b) simultaneously transporting and compacting in parallel the fibre strips in the squeezing zone (6) by way of the two transport rollers (4, 5), and c) simultaneously crimping in parallel the fibre strips in the compression channel (7), wherein the fibre strips are guided separately in method step b) by using a second separating device (61) and in method step c) by using a third separating device (71), and wherein the first, second and third separating devices (31, 61, 71) are designed such that t

Abstract: A solution casting apparatus includes a drive roller as a conveying means. The drive roller conveys a polymer film peeled from a belt, the polymer film still containing a solvent. The drive roller has corrugation valleys and corrugation peaks formed on a peripheral surface along a circumferential direction of the drive roller. Each of the corrugation valleys and the corrugation peaks has a substantially semicircular cross section. The corrugation valleys and the corrugation peaks are disposed alternately in an axial direction of the drive roller. A pitch Pv between the corrugation valleys and a pitch Pm between the corrugation peaks are in the range of 0.01 to 2 mm, and a height Hv-m from a lowest point of the corrugation valley to a highest point of the corrugation peak is in the range of 0.01 to 1 mm. A curvature radius Rv of the corrugation valley and a curvature radius Rm of the corrugation peak are in the range of 0.1 to 0.5 mm.

Abstract: Optical films having anti-Moiré and anti-wetout features are described, along with systems and methods for making these optical films. A master used to make optical films is formed using a single axis actuator cutting along a trajectory that is out of plane with the surface of the master. Movement of the cutting tool along the trajectory cuts grooves having variable depth and variable pitch into the surface. Prisms formed from the master have variable depth, variable height prisms that provide anti-wetout and anti-Moiré features.

Abstract: A mechanical activation system has a first activation member, a second activation member, an activation zone, and a non-slip zone. The first activation member has a first plurality of teeth, and the second activation member has a second plurality of teeth. The first plurality of teeth is capable of intermeshing with the second plurality of teeth. The activation zone includes a first portion of the first plurality of teeth and a first portion of the second plurality of teeth. The first portion of the first plurality of teeth and the first portion of the second plurality of teeth include teeth having continuous tips. The first non-slip zone includes a second portion of the first plurality of teeth or a second portion of the second plurality of teeth. The second portion includes a tooth having a discontinuous tip.

Abstract: An apparatus for embossing a web substrate is disclosed. The apparatus has first, second, and third pattern rolls. The first, second, and third patterns rolls each have respective first, second, and third pluralities of raised elements and recesses disposed thereon. A first nip is formed between the first and second pattern rolls and a third nip is formed between the first and third pattern rolls. The raised elements and the recesses of the first pattern roll are matingly engagable with the corresponding plurality of raised elements and recesses of the corresponding second and third pattern rolls. The first and second nips are both adapted to receive the web substrate and emboss the web substrate with the respective and corresponding embossing patterns when the web substrate is disposed within the respective nip.

Abstract: Described is a corrugator device for shaping thermoplastic corrugated pipes out of a molten plastic tube issuing from an extrusion device comprising moving molding jaws 1.1 through 1.6 which circulate in a linear molding section 10 and arranged in paired successive relationship in the molding section 10 form a molding passage, wherein the pairs of molding jaws are formed from left-hand and right-hand molding jaws 1.1 through 1.6 and between them enclose a cylindrical mold cavity to form the molding passage, and a gripper device 2 for guiding the molding jaws 1.1 through 1.6 from the end of the molding section 10 back to the start of the molding section 10. The gripper device has a gripper 2 for the left-hand molding jaws and a gripper 2 for the right-hand molding jaws with a guide and drive device. The guide and drive device has a linear guide rail X1 extending in the X-direction and a linear guide rail Y1 extending in the Y-direction, which are each in the form of respective separate rail devices.

Abstract: A description is given of a corrugator device for shaping thermoplastic corrugated pipes from a tube of molten plastics material emerging from an extrusion device, with molding jaws 1.1 to 1.6 which are guided so as to circulate in a linear molding section 10 and are arranged in pairs one behind the other so as to form a molding passage in the molding section 10, wherein the pairs of molding jaws are formed from left-hand and right-hand molding jaws 1.1 to 1.6 and between them enclose a cylindrical mold cavity to form the molding passage; with grippers 2 for returning the molding jaws 1.1 to 1.6 from the end of the molding section 10 to the start of the molding section 10. Arranged at the end of the molding section 10 is a mold release device, which has at least one motor-driven rotary disk 3.

Abstract: Necked nonwoven webs having improved cross-directional uniformity are made by a process which includes the step (prior to neck stretching) of corrugating the nonwoven web to reduce its width from an initial width A to a reduced corrugated width B. The cross-directional uniformity is optimized as the corrugated width B approaches the ultimate width C of the necked nonwoven web.

Abstract: A process of forming a microperforated plastic film includes providing a post tool having multiple posts, bringing plastic into contact with the post tool such that the plastic conforms to the shape of the posts, and solidifying the plastic into a solidified plastic film having a plurality of microperforations in the shape of the posts. Another step in the process is displacing any skins formed over the holes after solidifying the plastic. The process may be used to form a film for sound absorption where the posts are shaped and arranged to provide microperforations that provide a particular sound absorption spectrum. In one embodiment, the microperforations each have a narrowest diameter of 20 mils, a narrowest diameter less than a film thickness, and a widest diameter greater than narrowest diameter. The widest diameter may be about 125% or more of the narrowest diameter in an embodiment.

Abstract: A method and apparatus are used to form a corrugated web having a cross sectional shape with at least one characteristic that varies substantially continuously along the substantially the entire length of the web. The apparatus includes multiple sets of dies which progressively form corrugations in a moving sheet. At least one characteristic of the web's cross sectional shape is varied along the entire length of the web by displacing the dies as the sheet moves through the die sets.

Abstract: A pipe mold (1) produces plastic pipe with an internal wall having a first wall portion (23, 25) and a second wall portion (27). The pipe mold (1) includes a two stage cooling plug (35) to assist in setting the pipe wall. The first cooling stage (37) is controlled to remove heat from the pipe wall to partially set the plastic without excessive cooling. The partially set plastic pipe then passes over a second stage (39) where less precision in the cooling of the pipe occurs. The partially set plastic is more tolerant and subject to less damage. Preferably both the first and second stages (37, 39) include separate temperature sensors (120, 122) and control arrangements (124, 126) for varying the cooling medium of each stage. In a preferred embodiment a cooling medium is circulated through a first stage at a temperature and at a flow rate to maintain the first stage (37) within a narrow temperature range about the temperature of the cooling medium.

Abstract: An apparatus for the manufacture of compound pipes with an oval cross-section is equipped with mold halves which advance in a direction of production and of which two at a time combine as a pair on a molding path to form one mold. An injection head of at least one extruder is arranged upstream of the molding path. An external nozzle used for the creation of an external tube is substantially circular in shape and is located at a distance upstream of the molding path. An internal nozzle with a cross-section similar to the oval cross-section of the pipe to be created is located inside the molding path. When entering the molding path, the external tube extruded through the external nozzle is expanded in one direction and pressed together in a direction which is perpendicular to the former.

Abstract: A pipe molding apparatus includes a plurality of mold blocks (9) which move along a molding path to form double wall plastic pipe having an outer pipe wall with corrugations which set outside diameter of the pipe and an inner wall around a bore through the pipe. The mold blocks (9) have profiled faces which determine shape of the pipe. The profiled faces are reconfigureable in profile between first depth of the corrugations and diameter of the bore through the pipe without varying external diameter and while maintaining essentially constant wall thickness of the pipe.

Abstract: In a corrugating machine and a method of producing corrugated cardboard, provision is made for a marking device by means of which a color mark is applied by rubbing off a solid coloring agent, the color mark being detected by means of a detection device in order to easily and precisely mark and cut out joining points. The applied and detected color mark enables a web length of a web of single-faced corrugated cardboard in a storage device to be determined, thus allowing an electronic control device to operate a cross-cutting device in an easy and precise manner.

Abstract: A roller extruder for manufacturing Fresnel lens angular segments from raw plastic, the roller extruder having a blank roller and a die roller positioned a desired roller clearance from the blank roller, the die roller having two peripheral lens dies with an angular displacement between the lens dies increasing linearly from a die junction at the inside roller edge to approximately three hundred sixty degrees at the outside roller edge, and the die roller having peripheral Fresnel facet dies.

Abstract: A mechanical activation system has a first activation member, a second activation member, an activation zone, and a non-slip zone. The first activation member has a first plurality of teeth, and the second activation member has a second plurality of teeth. The first plurality of teeth is capable of intermeshing with the second plurality of teeth. The activation zone includes a first portion of the first plurality of teeth and a first portion of the second plurality of teeth. The first portion of the first plurality of teeth and the first portion of the second plurality of teeth include teeth having continuous tips. The first non-slip zone includes a second portion of the first plurality of teeth or a second portion of the second plurality of teeth. The second portion includes a tooth having a discontinuous tip.

Abstract: A half-mold for a corrugator for making pipes with transverse ribs. The half-mold comprises two sides located spaced apart from each other and a semi-cylindrical base surface linking the two sides. Directly mounted forming elements bent in the shape of a semicircle which define the outer surface of the pipe with transverse ribs are removably fixed on the base surface. The directly mounted forming elements bent in the shape of a semicircle are removably fixed with fixing elements on the half-mold.

Abstract: An extruding apparatus which extrudes continuous length of hollow plastic product has an extruder (3) which feeds molten plastic through die equipment (5) to a mold tunnel (7) formed by side by side moving mold blocks (9). The apparatus includes air turbulence internally of the product within the mold tunnel to assist in setting shape of the product. The air turbulence is provided by an air moving member (17) located internally of the product within the mold tunnel and a power source for the air moving member. The power source is located externally of the mold tunnel and a power transfer is provided to feed power from the power source through the die equipment to the air moving member without cooling of the die equipment.

Abstract: Process and apparatus for continuously and permanently shaping a plate in plastic material according to an undulated profile. The apparatus includes a guide and positioning surface of the plate; a moulding and transferral wheel, peripherally shaped according to a plurality of seats, suitable for reproducing a continuous shaped profile; and a positioning, advancement and maintenance assembly in the form of a plate, peripheral with respect to the moulding wheel, of the mobile type, respectively; counter-clockwise in synchronization with the moulding and return wheel in a position independent of the moulding wheel. The assembly includes a pre-form presser, upstream of the surface involved in the shaping, set apart by at least one first stabilization and cooling presser, a moulding presser, interposed between the pre-form presser and a cooling presser; and a possible blade for detaching the plate from the seats.

Abstract: A device for manufacturing a double-walled thermoplastic pipe with a connecting sleeve has a molding tunnel with a succession of molds for forming a corrugated molding wall and a connecting sleeve, respectively. An extrusion device extrudes a first flexible tube into said molding tunnel and a second flexible tube into said first flexible tube. A first gas channel is arranged for generating a pressure between said first and second flexible tubes. A compressed-gas control device is connected to said first gas channel for generating a pressure p1 or a pressure p2 in said space between said first and second flexible tubes by compressed air emerging from said first gas channel. A second compressed-gas control device is connected to a second gas channel for guiding compressed gas onto an inner side of said second flexible tube. Said first pressure controller is connected to said first gas channel via a compressed-gas line that is connected to an additional compressed-gas reservoir for gas exchange therewith.

Abstract: Described is an apparatus for the production of transversely ribbed tubes comprising mold jaw halves which are movable in a condition of bearing against each other along two guide. The guide paths have a common mold section, a respective return section and two respective direction-changing sections. The respective direction-changing section has a direction-changing member which is linearly movably guidedly arranged on a base element fixed with respect to the machine and which is connected to a compensating device which is provided to compensate for the tolerance play of the mold jaw halves which circulate along the associated guide path, said tolerance play being dependent on the temperature and/or the speed of the mold jaw halves.

Abstract: An embedment device for use in a structural panel production line wherein a slurry is transported on a moving carrier relative to a support frame, and chopped fibers are deposited upon the slurry, includes a first elongate shaft secured to the support frame and having a first plurality of axially spaced disks, a second elongate shaft secured to the support frame and having a second plurality of axially spaced disks, the first shaft being disposed relative to the second shaft so that the disks intermesh with each other. The intermeshing relationship enhances embedment of the fibers into the slurry and also prevents clogging of the device by prematurely set slurry particles.

Abstract: Described is a mold jaw half for an apparatus for the production of transversely ribbed tubes, wherein the mold jaw half (16) has end faces and a base face and in its interior a cooling passage with a coolant feed and a coolant discharge, which open at a spacing from each other at the base face of the mold jaw halves. In order to provide a reduced flow resistance for the coolant through the cooling passage and consequently an increased coolant through-put, resulting in an improved cooling action, it is proposed that the coolant feed and the coolant discharge cross, as seen in a direction viewing on to the end faces of the mold jaw halves, and are oriented in opposite relationship with respect to the advance direction of the mold jaw half. That mutually opposite orientation provides that the coolant is virtually shovelled into the cooling passage.

Abstract: Described is an apparatus for the production of transversely ribbed tubes, comprising mold jaw halves which are circulatingly moved in a condition of bearing against each other along two endless guide paths by means of a respective associated drive device, wherein the two guide paths have a common mold sections, a respective return section and two respective direction-changing sections. The respective direction-changing section has a direction-changing member provided with an arcuate guide edge. The guide paths along the common mold section and along the return sections have elongate wearing elements comprising a low-wear plastic material, which are exchangeably provided on a base arrangement of the apparatus.