Abstract: A rollout apparatus for rolling trapped air from a resin impregnated fiber mat has two carriage assemblies mounted for reciprocated movement in opposite direction. Each of the carriage assemblies carries depending rollers that engage an impregnated fiberglass mat laid on a mold. The carriage assemblies oscillate simultaneously in opposite directions so that the turning forces generated by the receiprocation cancel each other, thus providing a smooth vibration-free mechanism.

Abstract: An apparatus and method for forming a strip of elastomeric material which is extruded onto a rotating roller where it is initially shaped by a die plate and then finally shaped by a calender roll positioned downstream from the die plate and in close proximity to the surface of the roller providing a finishing gap for finally shaping the strip of elastomeric material. The calender roll may be positioned on the opposite side of the roller from the position the elastomeric material is extruded onto the roller whereby the calender roll resists forces tending to bend the roller. The extruder screw may have a downstream end adjacent the roller for reducing the pressure and for self-cleaning the apparatus.

Abstract: A dough working device includes a rectangular body with a recess in the top surface thereof for receiving dough to be rolled; a plurality of thin plates for insertion into the recess for changing the depth thereof and consequently the thickness of the dough; a second, circular recess in the bottom surface of the body for carrying a turntable; a plug normally carried in a well in one side of the body for insertion into a well in the circular recess when the body is inverted for rotatably supporting the turntable; and a rubber pad supporting the body in either the dough rolling or turntable position.

Abstract: A bread moulder has a feed chute for receiving dough pieces and directing them between counter-rotating sheeting rollers for flattening the dough and directing them between convergent runs of driven endless upper and lower belts. At the sides of the feed chute are feed tubes aligned to receive elongated fingers of dough endwise and to direct them gravitationally between the sheeting rollers to be delivered to and wound spirally by the upper and lower belts for the production of shell rolls.

Abstract: The invention relates to a process and apparatus for processing elastomeric material in particular plastic, rubber and a mixture thereof in roller-head-apparatus in which the material to be processed is plasticized and homogenized in an extruder, extruded from an extrusion head provided on the extruder and then is led through an aperture formed between two rollers. It is the object of the present invention, with an especially simple extrusion head in a roller-head-apparatus to produce uniform and dimensionally exact sheets or foils of different thicknesses without changing structural parts. The invention achieves this in that material formed in plate form by parallel outlet surfaces of the extruder head is led through an aperture space formed between a concave cylindrical surface of a stationary forming tool and the circumferential surface of one of the rollers of the calender before the material enters the space between the two calender rollers.

Abstract: A machine and process for a web of material employing two side-by-side sets of spaced apart driven disks adapted to rotate respectively in opposite directions about two spaced apart parallel axes, the axes being sufficiently close that peripheral margins of the disks of one set run between the peripheral margins of the disks of the other set in a mated relationship, the sets of disks mutually defining a series of web driving regions spaced apart in a direction parallel with the axes, with successive web driving regions, offset from one another, open channels between said disks providing, with the driving regions, a width-wise continuous, non-linear cross-section corridor through which the web passes, the driving regions adapted to impart to a web led lengthwise into the corridor, crosswise tension in the web, pulling the web about the edges of the disks, the tension enabling the disks to apply forward driving force to the web and retarding means closely disposed to the driving regions located to apply retardi

Abstract: A rotary roll extruder which performs shaping of material to be extruded such as raw rubber, or the like by ejecting the material to be extruded through a mouth piece by means of an extruding roll. This extruder comprises mouth piece moving means for moving a mouth piece in a radial direction of an extruding roll to make the mouth piece approach, or separate from, the circumferential surface of the extruding roll, mouth piece positioning means for positioning the mouth piece when the mouth piece is held apart from the extruding roll, and mouth piece stocking means for preliminarily stocking various kinds of mouth pieces. Shaping of the material to be extruded is effected when the mouth piece has been brought close to the circumferential surface of the extruding roll by the mouth piece moving means and it has been positioned by the mouth piece positioning means.

Abstract: An improved multi-channel transparent jacket to accommodate film strips is disclosed. The jacket is constituted of top and bottom rectangular panels of flexible plastic material and ribs formed of plastic or other adhering material in situ along parallel lines between the panels and integrally bonded thereto to maintain the panels in spaced relation and to define open-ended channels whose width is substantially equal to the width of the strips. The thickness of the ribs is substantially equal to that of the strips. Improved bonding of the ribs to the panels is accomplished by striating the panels to increase the surface area within a given width available for bonding. In one embodiment, an ultrasound hammer is used in conjuction with a specialized anvil to striate the panels.

Abstract: A method of roller forming thermoplastic sheet material to form large parts includes providing a form having a surface of predetermined curvature. A sheet of thermoplastic material is overlain on the form surface and heated until pliable. Pressure is provided on the thermoplastic sheet using a roller so that the sheet conforms to the shape of the form.

Abstract: An illustrative embodiment of the invention comprises an annular device for preparing pie crusts in which the inner margin of the device defines the central, circular opening. The margin, perpendicular to the base of the device, also forms a cutting edge that slopes away from the opening and toward the base until it intersects a flat working surface for the device. An arcuate surface, curving from the working surface to the base enables the device to be positioned on a breadboard with the cutting edge oriented in the proper direction. By rolling dough deposited in the opening, the opening fills up to the margin and surplus dough flows over the cutting edge and onto the working surface, the cutting edge severing the surplus dough from the shaped mass in the opening. The device, with surplus dough, is lifted smartly away from the breadboard, leaving a circular pie crust of uniform thickness defined by the marginal distance between the base and the crest of the cutting edge.

Abstract: An apparatus and a method for hot-forming a laminated sheet of synthetic resin. The sheet, in at least its region that is to be deformed, is heated to the forming temperature which is equal to or higher than the melting temperature of a thermoplastic bonding agent which is disposed between the laminate layers containing a duromer plastic material and planar carrier materials. The sheet is bent around a cylindrical surface with the aid of a movably guided bending plate, and is cooled. During a large part of the bending operation, the bending plate will be in planar contact with the border region of the sheet. The individual laminate layers will be mutually displaced in the bending region and in the border region in the direction of the sheet's surface, and after the bending operation, the bending plate holds the border region in its bent position at least until the resolidification of the thermoplastic bonding agent.

Abstract: A variable contour rubber extruder comprises a rotary driving roller, a main body forming therein an eccentric arc chamber with the rotary driving roller, and a movable mouth piece forming with a barrel surface of the rotary driving roller an opening of variable sectional area for extruding rubber material. The movable mouth piece comprises a center piece movable toward and away from the barrel surface of the rotary driving roller and a pair of side pieces overlapping the center piece and slidably adjustable in directions in parallel with an axis of the rotary driving roller.

Abstract: Microcreping apparatus has an assembly of superposed sheet members which are pressed by presser means against a surface of a material being treated to compress the material against the surface of a drive roll preliminary to engagement of the material with a retarding means. The sheet member assembly is supported as a cantilever by holder means to which at least the primary and outer sheet members of the assembly are connected by a plurality of pins on the holder means received in slots in the connected superposed sheet members spaced inwardly across the path of travel of the material adjacent the rearward edge of the sheet members. The slots extend transversely of the direction of travel of the material and have sufficient clearance from the pins to permit movement thereof relative to the pins corresponding to local expansion or contraction of the respective sheet members under heating and cooling respectively.

Abstract: Apparatus for compacting powdered and fibrous raw materials to a pellet product, comprising a mixing chamber with an inlet, a driven mixing shaft coaxially with respect to the mixing cylinder and which is provided with radially projecting blades. A pelletizer is connected directly to the mixing cylinder, and comprises a cylindrical mold coaxially inside a cylindrical jacket part and provided with radial holes, and inside which are arranged one or more freely rotatable pressure rollers as a result of which, when the apparatus is working, the compacted mixture is pressed through the holes, while the jacket part of the pelletizer is provided with an outlet for the compressed product. The mixing shaft is designed as a cylinder, rotatable coaxially with respect to a fixed supporting shaft.

Abstract: Apparatus for continuous extrusion of metals in which feed is introduced into a circumferential groove 26 (FIG. 3) in a rotating wheel 2 to contact arcuate tooling 22 and an abutment 24. The abutment 4 is spaced from the walls of the groove 26 so that in operation a lining of the feed material is produced. Indentations 52 assist in holding the lining in place. The extrusion is generally in a radial direction through an aperture 58. The extrusion orifices (not shown) may be of part annular cross-section of different area. The extrusion aperture may extend from outside the groove 26 to permit of increased orifice area.

Abstract: A process for making moldings with areas of marked final deformation from highly sensitive materials, such as tangled-fiber fleeces, in which the flat material is molded in the softened state between press molds. Prior to the actual molding process and independent of the desired molding of the final molding in a particular area and without any precompression of the material, the material is mechanically drawn between the corresponding press molds to such an extent that the resulting material flow roughly corresponds to the feed requirement for the final molding operation. The necessary auxiliary device comprises one or more push-rods with ram heads, which can be brought between the press molds when the press is in the open position and can be moved in the desired directions in the manner of an automated human fist.

Abstract: The invention relates to a device for the positive drawing to great lengths of lumps of dough already pre-lengthened. This device is inserted between the shaper-lengthener and the chute in the automatic sequence of the different phases of treatment of an industrial manufacturing line for long loaves.This device is characterized by having a turning group formed of a drive shaft driving in rotation, two series of discs diverging either side of the median plane and whose volume determines a drum, this turning group being subject to a continuous movement of rotation, and taking in the pre-lengthened lumps of dough and giving them back drawn after a trajectory of approximately a semicircle across a partial annular space making them roll against a fixed shell.The invention concerns installations for the automatic shaping of long loaves.

Abstract: A continuous molding method is disclosed as providing a sliding seal chamber in which moving molding surfaces form and can provide means for the induction of such temperature changes required to produce finished products from the chosen raw material.

Abstract: A flowable substance is extruded from two coaxial telescoping cylindrical containers of which the outer is provided with openings on its periphery and is rotatable about the inner container. The substance is fed to the inner container and exits via a row of openings therein. As the outer container rotates, the inner and outer openings radially coincide cyclically whereby the substance falls in the form of drops onto a belt and solidifies. The row of openings of the inner container is provided in a nozzle bar which is removably attached to the periphery of a body part of the inner container.

Abstract: A machine is disclosed for forming food items, such as cookies, into a fortune cookie shape with a paper fortune therein. The machine includes a device for feeding a succession of disc shaped blank food items to a moving track. A roller both advances the blank and forms grooves in the blank at desired creasing lines thereof. A descending arm bearing a fortune slip then folds the blank into a generally half-moon shape by pressing it downward through a slit opening and releasing the fortune slip therein. A pair of worm gears, cylinders with mirror image helical grooves therein, are mounted adjacent to one another and turn in opposite directions. At one end of each cylinder finger-like elements project outward and revolve into simultaneous contact with the points of the half-moon folded blank and serve to both fold them about a thin transverse bar and to deliver opposite sides of the now fortune cookie shaped item into the grooves of the cylinders. These advance the item off of the bar and along the cylinders.

Abstract: A method of sizing thermoplastic foamed cigarette filter rods and apparatus therefore. The apparatus comprises a rotating drum member having a plurality of stationary heated block members mounted about the periphery thereof. The block members are positioned such that a specific gap is created through which the thermoplastic polymeric filter rods are rolled and compressed to a uniform circumference.

Abstract: Apparatus for the continuous extrusion of metals in which feed is introduced into a pair of circumferential grooves in a rotating wheel to contact arcuate tooling and abutments. The feed is constrained by the abutments to flow through exit apertures in a die top from the respective grooves to a substantially toroidal chamber around a hollow, open ended, portal mandrel to extrude through an annular die orifice as a cladding for a continuous core. Cooling air may be supplied to the interior of the cladding, which is subsequently swaged down on to the core. A solid mandrel may be utilized where it is desired to extrude tube.

Abstract: In a continuous extrusion machine in which feedstock is admitted to a peripheral groove in a rotating wheel, is enclosed in that groove by a cooperating shoe, is frictionally dragged along an arcuate passageway formed by said groove and a projecting portion of said shoe towards an abutment carried by said shoe, and is continuously extruded as a metal product through a die, is flash extruded through clearance gaps between cooperating wheel and shoe surfaces, is intercepted and broken off periodically in short lengths by teeth which project radially or transversely from the wheel, the arcuate passageway has a radial depth which progressively decreases in the direction of wheel rotation in a zone extending upstream from the abutment.

Abstract: A method and apparatus is disclosed for embossing 2 and 3 dimensional holograms upon the metalized surface of a thermoplastic film.

Abstract: Novel rotary processors which involve a devolatilizing stage including a rotatable element carrying a plurality of annular channels and a stationary element providing a coaxial closure surface operationally arranged with the channels to provide enclosed processing passages. Each passage of the devolatilizing stage includes inlet means, outlet means and a channel blocking member all associated with the stationary element and arranged and adapted so that material fed to the inlet can be carried forward by the rotatable channel walls to the blocking member for discharge from the passage. The passages are interconnected by material transfer grooves formed in the closure surface.The rotary processors of this invention include a novel vacuum system to evacuate the devolatilizing stage.

Abstract: A dough roller and shaper device for making pie crust, pizza crust, cookies and other food crusts. The device characterized by having a molded ring in a dough board for making quickly, with a standard rolling pin, crust uniform in size and thickness. The device can be used for making a bottom crust and a top crust when baking a pie in a pie pan.

Abstract: A dough manipulator adapted for manually controlling the thickness of dough is disclosed which comprises a roller with handles and means for maintaining the roller at a predetermined height above a surface, wherein the means for maintaining the height of the roller is placed at a predetermined distance from the ends of the roller. Height maintaining means include spacer rings positioned on the roller or spacer strips positioned on the surface. The manipulator is used in conjunction with a surface which is substantially flat.

Abstract: In a modified "Conform" machine for continuous friction-actuated extrusion of metals, especially particulate copper, the abutment at the outlet end of the working passageway does not fully block the end of the wheel groove. Instead a substantial clearance is left, and metal extruding through it adheres to the wheel to re-enter the working passageway at the entry end. Preferably the abutment is of semicircular cross-section. For a given output rate, a significant reduction in torque, and working stresses, is obtained.

Abstract: An elastomeric surgical glove with an improved ring rolled cuff and a method and apparatus to produce the cuff is disclosed. The ring rolled cuff comprises alternating tightly rolled segments with loosely rolled segments. The ring rolled cuff is made by contacting the uncured glove on the glove form with a plurality of rotating wheels while the wheels are moved on the form from the wrist end of the form toward the hand end of the form. The portions of the cuff in contact with the wheels are tightly rolled, and the remaining portions are loosely rolled.

Abstract: An apparatus for rolling plastic material such as bread dough or cookie dough so that the material has a substantially constant thickness throughout the entire mass. The apparatus includes an elongated cylindrical body having an outwardly extending axial handle at each end and each of such handles has a selected gauge wheel removably mounted at the outer end thereof.

Abstract: A rolling pin apparatus utilizes a pair of free wheeling right angle cylinders disposed in parallel relationship for application to a food work stuff. A chamber is secured to the structure supporting the journals carrying the two cylinders, which chamber is covered by a removable access cover. An inertia operated pendulum-like scraper rides over a screen, both disposed within the chamber so as to break up and dispense a dusting material, usually flour, directing same towards the bottom of the chamber. An elongated valve is connected to the bottom of the chamber and positioned over the cylinders so as to control the amount of flour dispensed onto the outermost areas of each of the cylinders, directed there by two vanes positioned intermediate the chamber and the cylinders. A third vane also acts as an elongated scraper so as to remove extraneous material collected on the surfaces of the cylinders at locations intermediate opposed faces thereof.

Abstract: Novel and improved methods and apparatus for processing liquid or viscous materials. Essentially, the methods and apparatus involve feeding liquid materials to an annular processing passage for controlled processing. The annular processing passage is provided by two elements. One is a rotatable element carrying at least one processing channel. The other element is stationary and provides a complementary coaxial surface arranged with the channel to provide the enclosed processing passage. Also associated with the stationary element are an inlet for feeding material to the passage, an outlet for discharging material from the passage, an element near the outlet providing a material collecting end wall surface and an element positioned between the inlet and outlet providing a liquid material spreading surface.

Abstract: An apparatus for making video discs by moulding from an engraved master which includes depositing on one edge of the master an elongated fillet of a curable resin; photopolymerizable or thermosettable and spreading gradually the resin between the master and a flexible film of a substrate which is applied by means of a pressure roller, the resin being then cured as required by ultra-violet or infrared radiation through the film. The apparatus may also include a mechanisms for piercing the central hole and cutting out the disc. The formation of a succession of discs on the same film may be automatically obtained, the film advancing step by step between each moulding and/or cutting out operation.

Abstract: Apparatus for shaping lumps of dough to flattened disks having substantially circular shape is provided. The apparatus comprises at least a first pair of rollers, generally two pairs of rollers, where flattening of the dough material begins, and a final pair of rollers where the dough material is flattened to its determined final thickness for baking. Between the final and next pair of rollers is a pair of conical rollers, gently urged towards each other, where the flattened dough material which emerges from the pair of rollers above the conical rollers is turned in a plane through an angle of about 60 to 90 degrees, so that the dough enters into the final pair of rollers with a different initial contact point than from the last pair of rollers. Generally, the dough material is elliptical when it is turned by the conical rollers, so that it becomes substantially circular after it emerges from the final rollers.

Abstract: Apparatus for continuous extrusion has a rotatable wheel with an endless groove therein, a relatively stationary shoe member overlying part of the groove lengthwise, a portion of the shoe member projecting part way into the groove and being constituted at least partly by a die assembly which includes a separate and replaceable abutment member which projects into the groove to block it. The die assembly can have separate and replaceable components constituting a feed chamber, a die throat, and optionally a mandrel supported in the die throat for producing tubular extrusion products. Cooling of the die assembly is also envisaged.

Abstract: A food preparation machine primarily designed for the production of the Italian potato based delicacy gnocchi and characterized by an inclined flouring ramp, a motor driven roller located under the lower end of the ramp, a deflection plate located proximate the roller, and a dough extruder for depositing dough plugs near the top of the ramp so that they roll and slide down the ramp into abutment with the deflection plate and the roller. As the roller is rotated the dough plugs are squeezed through a gap between the roller and the lower edge of the deflection plate to take on the characteristic form of gnocchi. A flouring mechanism is provided to flour the parts of the machine that come into contact with the dough, including the ramp and a rotating knife blade which cuts the extruded dough into the plugs. The roller is threaded from both ends with opposing threads so that the plugs are urged towards the center of the roller as it is rotated.

Abstract: Novel and improved methods and apparatus for processing liquid or viscous materials. Essentially, the methods and apparatus involve feeding liquid materials to an annular processing passage for controlled processing. The annular processing passage is provided by two elements. One is a rotatable element carrying at least one processing channel. The other element is stationary and provides a complementary coaxial surface arranged with the channel to provide the enclosed processing passage. Also associated with the stationary element are an inlet for feeding material to the passage, an outlet for discharging material from the passage, an element near the outlet providing a material collecting end wall surface and an element positioned between the inlet and outlet providing a liquid material spreading surface.

Abstract: In extrusion apparatus of the type having a generally cylindrical roller, a stationary die head surface confronting the roller and defining therewith an extrudate chamber, and means for rotating the roller to force material through the chamber to an extrudate shaping orifice defined by the roller and a downstream portion of the die head, a bearing pad is interposed between the roller and the die head. The roller is biased against the bearing pad so that the pad serves to space the roller from the die head to accurately control clearance between the die head and roller at the extrudate shaping orifice.

Abstract: For producing rod-shaped tobacco-smoke filter components each having one or more annular tobacco-smoke barriers, annular grooves open at their peripheries are formed in rod-shaped bodies of smoke-filtration material, the grooved bodies are conveyed in a direction transverse to their longitudinal axes along an arcuate path, and settable barrier material is deposited in the grooves during the conveyance along said path, the bodies being rotated about their said axes during the deposition of the barrier material.

Abstract: This invention is the means of support for rollers on a roller type press. This means of support is the configuration of four cables, straps or other suitable material under tension in relation to two rollers and a bed. Rotation is applied to either roller, the cables transfer the rotation to the opposing roller, supply the pressure between the rollers and guide the rollers as a set across the bed. The press can take many forms to provide an economical device, capable of many of the less demanding applications.

Abstract: Apparatus for processing compressible, heat settable material, and in one embodiment, useful in producing foodstuffs including so-called tortillas made from wheat flour, comprises a step-motion, rotatable, heated drum; a curved, pivotally-mounted, heated compression plate positioned in proximity to the drum for being swung into position parallel to the surface of said drum when the drum is in the stop-phase of step motion; feed means for feeding foodstuff materials into the region between the drum and the plate when the plate is swung away from the drum; and means for conveying compressed foodstuffs away from the drum surface as it rotates in the motion phase of the step motion.

Abstract: Apparatus for shaping strands of material used in confectionery production with a pair of rollers forming the bottom of a hopper for delivering material. The rollers are formed of smooth surfaces between which a gap has been left. In the gap a strand formation device adapting to the surface of the two rollers, has been inserted. The device is formed from a comb-like insert which, with its lateral boundary surfaces, conforms to the cylindrical surfaces of the two rollers. In the surface facing the intake roller there are grooves or passages 10 which run in the peripheral direction of the rollers and shape the composition into strands.

Abstract: Method and apparatus for processing solid and viscous plastic material or polymeric material and the like in which plastic or polymeric material is fed through an inlet into an enclosed passage of which opposed side walls are moving simultaneously toward an outlet and the material is processed and dragged forward by the moving side wall against a channel block and with progressive build up of pressure along said passage for discharging the processed material through the outlet from the enclosed passage. Rotary apparatus for practicing the method includes one or more annular channels having opposed side walls and carried by a drive rotor member for movement relative to a housing of which an annular surface coaxial with the rotor cooperates with the walls of the channel or channels to form an enclosed annular passage or enclosed annular passages.

Abstract: Device for recovering thermoplastic materials comprising a hopper and downstream of the latter a chamber of decreasing cross-section, means for feeding to said chamber the material from the hopper, means for supplying heat to the material for gradually melting the material being fed in the chamber, one or more orifices being provided downstream of the chamber for the outlet or discharge of the material.

Abstract: An embossing roller has protruding lands extending radially outward from the surface of the roller to provide corresponding indentations in a thermoplastic surface to which the roller may be applied. A layer of resilient material underlies the lands so that when the roller is rolled over an irregular surface, individual lands, or groups of lands, may be depressed different amounts so that embossing indentations are formed in all portions of the surface. By applying adequate pressure to the roller, all of the lands are depressed at their points of contact when in contact with the surface if the surface is flat and regular. The lands are forced by action of the resilient material into contact with the bottom of any slight concavity in the surface and adapt to any slight convexity. In some embodiments, lands protrude outwardly from metal rings which encircle the roller. In other embodiments, lands are supported directly by the resilient material.

Abstract: Apparatus for treating lengthwise traveling material has a material driving member provided with alternating grooves and lands extending parallel to the direction of drive of the material, presser means to press the material against the lands, and a retarder member downstream of the presser member for deflecting the material away from the driving member, the retarder member having an edge portion extending across the path of travel of the material provided with teeth extending into the driving member grooves with clearance from the groove walls, and intervening slots receiving therethrough the lands of the driving member with clearance from the slot walls. The construction avoids snagging of the material by, or diving of the material under, the retarding member, and wear of the retarder member.

Abstract: A dough frame comprising in combination a discoid bottom plate; a first member removable thin sheet of plastic material sufficient in size to be mounted smoothly over and folded under said discoid plate; an annular rim element, having a rim height greater than the thickness of said discoid plate, the latter covered by said first member plastic sheet, and said rim element having a diameter adjusting means and supporting means cooperates with the said discoid plate covered with said first member plastic sheet to form a cavity or mold for accepting a pie dough mixture; a second member thin sheet of plastic material sufficient in size to enclose said dough within said cavity and to provide an interface between the said dough and a rolling pin and between the upper edges of the said rim element surrounding the said dough and a rolling pin.

Abstract: In the extrusion of a material, which can be a metal feedstock, through a die means by maintaining frictional engagement of the material with passageway defining surfaces of a member which is moved towards the die means such that frictional drag of the passageway defining surfaces urges the material through the die means, the improvement of providing a change in cross-sectional area and/or shape of the passageway along its length in the direction of movement of the material for extruding to a product having a cross-sectional dimension larger than any cross-sectional dimension of the feed by changing the passageway such that at least one cross-sectional dimension of the passageway at the die end thereof is greater than the corresponding dimension at the inlet end thereof, or, for facilitating multiple extrusion at positions spaced apart in the lengthwise direction of the passageway at the extrusion die end thereof, by changing the passageway such that the cross-sectional area of the passageway diminishes in pr

Abstract: The surface of a mouldable material such as wet cement is shaped to a desired configuration by a profile forming device moved longitudinally relative to the material and rotated about an axis transverse to the direction of bodily movement. The profile forming device is eccentrically mounted or otherwise shaped to produce cyclic variation in level in the longitudinal direction and has a variable configuration along its length to provide a transverse variation in level of the surface. The profile forming device is driven at a speed to cause rubbing over the surface. It may also be moved bodily in a cyclic manner in the direction of its axis and/or away from and towards the surface.

Abstract: To cover at least one face of an extruded, hollow, plastic body, the front face of the extruder die is formed with a recess in which a cylindrical roller is rotatably mounted contiguously adjacent the die orifice. The roller defines a first portion of a feed channel for a foil with the die wall in the recess and a second channel portion, tangential to the first, with the mandrel which defines an extrusion gap in the die orifice. The foil may be draped about side faces of the mandrel by pressure rollers if the extrudate is backed by mandrel portions extending to the pressure rollers.