Abstract: A ceiling-mounted attic door features a continuous outer panel of flame-resistant plaster board, an intermediate layer of thermal insulating material and marginal sealing gaskets and insulating strips arranged to thermally seal the marginal edges of the door when it occupies a normally closed position within its associated door opening.

Abstract: Within an opening in a wall is placed a window or door having a frame, consisting of metal and plastic interlocked extrusions with a polyurethane core therein. The polyurethane core prevents penetration of condensate therethrough to the underlying casement consisting of wood studs, sheeting and dry wall.Within the frame is a sash comprised of a set of metal and plastic extrusions which are interlocked and also form a cavity with a solid polyurethane core. The two extrusions have glazing beads to receive a glazing consisting of a double pane of glass separated to provide an insulating dead air space.

Abstract: The invention provides apparatus and a method for use in machining cam profiles, and is suitable for use in grinding, milling, turning or otherwise forming cams. A workpiece, i.e. a cam blank, is rotated adjacent a machine tool (e.g. a grinding wheel) and is moved relative thereto laterally of its axis of rotation so that stock is removed from the workpiece to form a predetermined cam profile thereon. At the same time, the angular displacement of the workpiece relative to a datum is continuously monitored and the rotational speed of the workpiece is varied in dependence on its instantaneous angular displacement so that the stock can be removed at a substantially constant rate, preferably defined by a predetermined program corresponding to the particular cam profile to be machined on the workpiece.

Abstract: A grinding disk for forming a spur gear includes a single integral disk member having a grinding surface including a finish grinding tooth and a pre-grinding tooth. The finish grinding tooth has a profile corresponding to the desired configuration of the flanks of adjacent teeth and the tooth gap therebetween for a given spur gear to be formed. The pre-grinding tooth has a profile formed by curved surfaces only. The finish grinding tooth and the pre-grinding tooth are spaced by distance equal to one tooth pitch between adjacent teeth of the spur gear to be formed.

Abstract: A device is disclosed for sharpening both the blade and the screen of a circular blade type electric shaver. A cup is provided which seats in the well from which the screen and blade have been removed. The blade is seated in the cup and engaged to the drive post or shaft of the shaver. By driving the blade from the motor of the shaver while an abrasive surface is held against the blade its cutting edges are sharpened. To hone the inside of the screen a rotor is placed in the cup. The top of the rotor has an abrasive surface. When a screen is pressed against the abrasive surface and the rotor is driven by the shaver motor, the inside surface of the screen is honed.

Abstract: Both a tub surround kit and a method for installing a tub surround are disclosed. The kit comprises four wall panels for covering the back and two side walls surrounding a tub, and two corner panels for covering the joints between the back wall and the two side walls surrounding the tub. The two corner panels each include a pair of orthogonally disposed flanges which terminate in flared, flexible lips for overlapping adjunct edges of the four panels, thereby joining the four wall panels together. The back faces of the flanges of each of the corner panels are adhered or otherwise affixed to the wall corners so that the flared, flexible lip or each of the flanges is yieldably deformed around the edge of the adjacent panel in overlapping relationship.

Abstract: An accommodation unit to form, with a plurality of such units, a building, comprises a housing having corner posts, sidewalls, floor and ceiling panels, a window unit at one end and an end wall with a doorway at the other end. The housings are intended to be located side-by-side and stacked one on top of the other secured together at the corner posts.Concrete is cast between the adjacent side walls of the housings and the outer faces of the side walls are formed with T-section ribs which key with the concrete to provide a composite rigid wall.

Abstract: A dome structure having a plurality of isolatable and preferably environmentally isolatable and inhabitable compartments. These inhabitable compartments are preferably capable of generating an environmental condition capable of supporting animal life and preferably human life. The dome structure comprises a first upper dome section and a first lower dome section which form a first environmentally isolated dome chamber therebetween. The apparatus includes a second upper dome section having a peripheral size smaller than the first upper dome section. A second lower dome section has a peripheral size smaller than the first lower dome section and is capable of being attached to the second upper dome section to form a second environmentally isolated dome chamber.

Abstract: A system for connecting wall partitions or panels together wherein sets of two cross-drilled blind holes are formed in the ends of the partitions to be joined, one hole being of smaller diameter and opening on the end surface of the partition and the other hole of larger diameter opening on one of the side faces. The connector hardware involves three basic parts including a cylindrical plug member, in the larger diameter hole and has a threaded axial bore in one end and a communicating cross bore toward the other end, which bore also communicates with the smaller diameter hole. A second cylindrical connector member, is closely accommodated in the smaller diameter hole and in the cross bore of the plug member, and has a threaded axial bore in one end and a tapered groove or waist portion along its length. The third connector part constitutes a screw member that is adapted to be screwed into the axial bores in each of the cylindrical members.

Abstract: In a window lining, the corner between two adjoining lining plates is tightened by a wedge effect provided by engagement between a displaceable rail on the first plate and a rail fixed on the second plate. After the mounting of said second plate, the first plate can be brought into its place adjacent the fixed rail and can be tightened by hammer strokes which may be transmitted to the end of the displaceable rail via a flat mandrel so that the gap between the lining and the wall surrounding the window opening may be correspondingly narrow.

Abstract: A prefabricated wall facing panel for buildings is described. A method of making such panels is also disclosed. The panels comprise a rigid polyurethane backing sheet and a plurality of facing elements embedded in said sheet. Tongue and groove formations at the respective upper and lower edges of the panel are provided for interlocking with adjacent panels. The panels are secured to a support surface by channel-shaped attachment members which can be nailed to the support surface and which engage in the grooves in the panels.

Abstract: A box formed building panel has a section in the end walls that joins the panel to an adjacent panel and seals the joint against heat loss. The joining and sealing functions may be combined in a single construction, such as a wedge-shaped projection on one panel insertable into a sealant containing groove in the other panel, or, separate projection and groove combinations may be used for joinder and for sealing. Internal walls and stiffeners may be mounted in the building panel. The building panel may be filled with foam and auxiliary panels mounted on the building panel.

Abstract: Bricks which include a V-shaped depression in the top surface of the brick, extending lengthwise along the brick. The brick may be formed with vertically extending ridge-like projections in one end face thereof and a plurality of vertical grooves in the opposite end face.

Abstract: A system is disclosed for effecting movement of one or more operating devices such as capper chucks through a predetermined endless path having a straight line reach parallel to a conveyor on which containers or the like may be conveyed, the system including a fixed turret defining the endless path and being adapted to support and guide one or more devices along the endless path and having drive means cooperative with each operative device so as to effect constant speed movement of the devices along the straight line reach and, in a preferred embodiment, also effect rotation of the devices about their longitudinal axes as they traverse the endless guide track.

Abstract: A machine and method for packaging travelers checks in which the checks are automatically packaged in predetermined denominations and in predetermined amounts.

Abstract: The invention relates to a method and an apparatus for compressing voluminous material easy to compress and for storing and transporting the material in said compressed state. According to the invention, thus, there are provided a bottom and two opposed vertical walls capable to approach each other for compressing the material between the walls. When the material has been compressed to the desired volume the material is transferred to a storage or transport crate, which is located with its floor beneath the bottom and with its sides outside of and adjacent the walls. When the material is being discharged between the walls, it expands and presses against the side of the crate and an end side connected to the crate whereby the crate is moved with the material while being successively filled. When the material is being compressed it is pressed downward by a belt acting from above on the material.

Abstract: The method is of the kind whereby a number of strips of packing material is conducted through a cross section shaping station, through a filling station at which articles are arranged on the strips, through a longitudinally extending welding station at which each strip of material is welded into tube form, through a cross welding station wherein cross welding seams are made between the articles arranged in the packing tubes, and through a separation station for separating the finished packings from the strips of material. In order to obtain registration of the cross welding seams with respect to a pre-printed pattern on the strips of material, the cross welding means are individually controlled as regards their disengagement from the strips of material by means of pulses issued by indication marks arranged along the strips of material and arranged with a pitch corresponding to the length of the packings to be produced. The invention also relates to an apparatus for carrying out the method.

Abstract: Successive layers of stretch film are wrapped around a load stacked on a motor driven rotatable turntable, the film being supplied as the leading end of a web pulled off a rotatable non-driven roll, and rotation of the roll being initially positively restricted by a spring biased brake. Tension in the web is successively increased to automatically increase stretch in the web in stages during succeeding revolutions. An anchoring member is automatically projected to hold the pallet immovable on the table during wrapping.

Abstract: A mower comprises cutter blades mounted by bolts in bushes on cutter discs surmounted by hollow elements secured on respective shafts. Accommodated within or partially within the hollow elements are drive means including hydraulic motors, drive shafts, bevel gear wheels and a toothed wheel meshing with a toothed wheel. A splined shaft extends through the toothed wheels to synchronize the rotations of the cutter discs. A casing encloses the shaft and is provided with renewable sole pieces which slide on the ground.

Abstract: A mower-conditioner for cutting and conditioning grass or other fodder comprises in combination a housing accommodating a cutting device (for example a bottom-driven disc-type rotary scythe device or a reciprocating cutter bar device) and a first conditioning device (for example a flail drum rotating about a horizontal axis and provided with pivotally-mounted flails), and a second conditioning device (for example a belt-driven fluted drum). The said first and second devices have at least one element (for example the said flail drum and driving belts or the like) in common. There are combs and grids to act on the cut fodder, and the mower-conditioner is readily adjustable for the treatment or production of different kinds of fodder.

Abstract: A pair of laterally spaced, upwardly extending arms are pivotally attached at their lower ends to the sides of a wheeled frame for oscillatory movement about a horizontal axis. A transverse member is pivotally connected to the upper ends of the arms. A trio of rearwardly and downwardly extending arms are secured at laterally spaced locations to the transverse member and are oscillatable about an elevated horizontal axis, each of the last-mentioned arms having a sweeping unit in the form of a lawn rake or bristled broom attached to its rear or free end. Still another arm extends forwardly from the transverse member and has its forward end pivotally connected to a power-operated crank. As the machine is moved across the surface to be swept, as when raking a lawn, the rakes are repeatedly dragged forwardly, raised and then lowered so as to form a windrow of leaves and other debris.

Abstract: A crop divider pivotably mounted to the end of a harvesting platform about a horizontal axis, said divider having a plate with a reinforcing frame and two convexly curved surfaces tapered from front to rear. The leading curved surface is sloped rearwardly and is curved inwardly toward the harvesting platform. The rear curved surface is curved outwardly away from the harvesting platform.

Abstract: A harvester for shaking a grape vine to remove grapes therefrom. A harvesting vehicle includes a pivotally mounted picking head suspended over in straddling fashion a row of grape vines. A pair of swingably mounted and oppositely aligned contact members are reciprocated in unison back and forth against opposite sides of the grape vine. The contact members are driven by a pair of cranks in turn rotated via a belt and motor combination. A pair of counterweight shafts rotatably mounted within the head have off-centered counterweights with each shaft being rotated in unison with but in an opposite direction by its associated crankshaft in turn driving the crank arm and contact member. Horizontal force from the rotating counterweights are additive to forces from additional counterweights associated with the rotating crank arms to neutralize oppositely directed forces from the reciprocating contact members.

Abstract: A method and apparatus for making a cord to be used for reinforcing an elastomeric article such as a tire for a motor vehicle are disclosed. The cord has a core formed by twisting together a group of wires and a series of radially disposed crown layers of wires wound helically about the core or next innermost crown layer side by side and parallel to each other. The apparatus has two machines each having a cage and a shuttle disposed in the cage for winding crown layers from bunches of wires. A device for flexing the wires used to form the crown layers to deform them before winding is included. The two machines are coupled together by a device which determines the relative speeds of rotation of the first and second cages at a 2:1 ratio, respectively.

Abstract: A wrap-winding spinning machine for producing wrapped yarns having draw frames for attenuating slivers, wherein one wrap-winding apparatus is associated with each draw frame is proposed, with the wrap winding apparatus further including a high speed rotor and a yarn channel coaxial with the axis thereof, the rotor associated with a driven hollow spindle and a bobbin supported thereon and a balloon limiter supported on the machine frame by upstanding opposed ribs. The bobbin supports a centrally apertured cap device with the cap device having a continuously curved, convex end face with a sharply curved rim that merges with the end disc of the bobbin. The aperture in the cap device is arranged to receive the feed of the winding thread and the sliver as it passes downwardly into the yarn channel and is emitted as a finished wrapped thread.

Abstract: A spinning machine is disclosed, which generally comprises a spinning rotor having a frusto-connical fiber sliding surface consisting of a first fiber sliding portion, onto which discrete fibers are first supplied, and a second fiber sliding portion connected to the first fiber sliding portion, a bottom surface, and a fiber collecting groove formed between the second fiber sliding portion and the bottom surface. The spinning machine further comprises a yarn take-up tube centrally extending into the spinning rotor to take up a spun yarn therethrough.The first fiber sliding portion forms an angle (.alpha.) with a plane of rotation of the spinning rotor larger than an angle (.beta.) formed by the second fiber sliding portion with respect to the same plane. The bottom surface of the spinning rotor includes a fiber guide portion, which forms the fiber collecting groove in cooperation with the second fiber sliding portion and is inclined at an angle (.delta.) with respect to the plane of rotation. This angle (.

Abstract: A textile spindle mount is provided by the subject invention in which a layer of elastomeric material is disposed between and attaches to a flat washer along its bottom surface and a cupped washer along its top surface. The cupped washer includes end sections which extend downwardly and attach to the outer edge of the elastomer layer for limiting the bulging thereof under compression loads. The bulging of the elastomer layer is further controlled by removing a generally curved section of elastomeric material adjacent the outer edge of the elastomer layer. As a result, a high compression to shear springrate ratio is obtained with the spindle mount herein which is capable of good noise and vibration isolation and can accommodate high compression loads without bond failure.

Abstract: The combustible component of a gas stream of low heating value is combusted using less than a stoichiometric amount of oxygen in the presence of an oxygenation catalyst and the heat energy in the combusted gas is utilized, for example, by expansion in a gas turbine.

Abstract: A gas turbine plant having a gas turbine and an associated compressor that is operated to produce compressed air. The compressed air is applied to support the combustion of an ignited fluidized bed of combustible material disposed within a main combustion chamber. Combustion gases from the fluidized bed are applied to drive the turbine and the compressor. Auxiliary heating chambers are employed to heat the combustible material of the fluidized bed to an ignition temperature over a turbine start-up interval. An ignition combustion chamber is connected in parallel with the fluidized bed and is operated during the turbine start-up interval to apply its combustion gases to drive the unloaded or lightly loaded turbine and compressor.

Abstract: A gas turbine control for ameliorating the adverse affects of cyclic load applications to both single-shaft and two-shaft gas turbines is disclosed. During cyclic load conditions, air flow is governed to control the output of the gas turbine while fuel flow is controlled to hold the firing or exhaust temperatures substantially constant. Regular fuel flow governing during non-cyclic loading conditions is also provided.

Abstract: This application discloses a secondary air control system in an internal combustion engine.

Abstract: A cylinder-piston internal combustion engine which includes at least two single or two two-stage exhaust gas turbochargers which together and in parallel supply the cylinder of the internal combustion engine with charging air when there is a large supply of exhaust gases from the internal combustion engine. When there is a small amount of exhaust gases available, at least one of the exhaust gas turbochargers is adapted to be switched off so as to increase the charging pressure. A check valve is disposed in a suction line of a compressor of the exhaust gas turbocharger which is adapted to be switched off with the check valve allowing a flow of air in a suction line of the compressor in a direction of the compressor but prevents a flow of air in an opposite direction.

Abstract: A portable cryogenic liquid storage-gas supply system including an evacuable double-walled cryogenic liquid container being invertible between a top-up dispensing and bottom-up filling positions wherein the container comprises a liquid withdrawal-gas vent tube terminating within the container near the bottom end, a gas vent-liquid fill tube positioned within and penetrating the wall of the liquid withdrawal-gas vent tube and terminating within the container near the top end, and a splash deflector within the container for redirecting a fluid discharged from the gas vent-liquid fill tube toward the container top end during liquid fill of the container.

Abstract: An improvement in refrigerated display cabinets in which barrier doors and one or more guard air bands protect the primary refrigerated air band which is circulated within the cabinets during time periods when the barrier door is opened. The cabinets may be equipped with air defrost systems. When two guard air bands are employed, the outermost of these is directed across the outside surface of the barrier door. The air defrost system can incorporate a door opening mechanism which provides a gap between the barrier door and the access opening in order to permit ambient air through-flow for defrost purposes.Control circuitry can be controlled by opening of the barrier doors in order to actuate the guard air band movement.

Abstract: A solvent phase of low solute content is contacted with a solute gas phase for absorption of the solute; effluent gas is condensed in admixture with a portion of the solvent phase which has not been fed to the absorption zone. Overall thermal yield is increased.

Abstract: An air conditioner in a vehicle is driven by the vehicle engine through an electrically controlled clutch. An upright, miniaturized mercury U-tube is mounted on the vehicle with the legs of the U-tube in upright position. Electrical contacts positioned in one of the legs are variously washed by the mercury depending upon the workload placed upon the engine. The contacts are in circuit through the mercury with the vehicle battery and the clutch. Driving of the air conditioner is automatically and temporarily interrupted when more engine power is needed. Several contacts may be used to afford a selection of levels of sensitivity. Acceleration disconnects the air conditioner compressor. Deceleration, idling and consistent driving speed permits the air conditioner compressor to operate normally.

Abstract: A defrost system for refrigeration units, particularly heat pumps, is described. Features include means for initiating a defrost cycle upon the concurrence of two sensed conditions, and terminating the defrost cycle either on the lapse of a determined time interval or the occurrence of a sensed condition, whichever occurs first. Delay timer means prohibits consecutive defrost cycles or a defrost cycle upon restoration of power in the event of a power failure. Means are also provided permitting short cycle testing of the system.

Abstract: A device for overriding a time switch of an air conditioning system having an air conditioner unit and a thermostat remote from the unit, the thermostat controlling the unit through conductors extended from the unit and having a switch for selection of a mode of operation of the unit; the time swtich being intended to inhibit operation of the unit to conserve energy at times when such operation is not usually desired; and the device being disposed at the unit and signaled through the conductors by manipulation of the thermostat switch to override the time switch for a predetermined period of time.

Abstract: A rotary compressor for use in air conditioning or the like including a housing having a chamber with a cylindrical rotor journaled therein, the rotor having a set of vanes radially slidable to define enclosed compartments between them. The curved outer wall of chamber has a reference region separating the chamber into inlet and outlet sides having inlet and outlet ports in straddling relation. The rotor has its axis laterally offset from the chamber axis to produce sealing at the reference region. The curved wall of the chamber on the inlet side is of substantially elliptical profile with the major axis of the ellipse generally centered on the inlet side and with the inlet port extending to a point of cut-off short of the major axis. The curved wall on the outlet side is smoothly continuous and substantially circular in profile.

Abstract: A refrigeration circuit is disclosed which is operable in each of four distinct modes for the heating or cooling of a space, the production of a heated liquid, or the simultaneous cooling of a space and production of heated liquid. The circuit includes compressor means; indoor, outdoor, and liquid heat exchange means; along with vapor conduit means including first valve means and liquid conduit means including second valve means so as to afford selective operation of the circuit in any one of the aforementioned modes. A significant feature of the invention lies in the fact that, during operation in any particular mode, the inactive heat exchange means of the circuit is vented to the suction side of the compressor means so as to afford proper refrigerant charge control within the circuit. Control means are further disclosed which sense the load imposed upon the compressor means and prevent overloading thereof during operation in a water heating mode.

Abstract: A refrigeration system having an open front display portion and a rear storage portion. The display portion has a plurality of shelves that are accessible through an opening in the front of the display portion. Access to the shelves also can be obtained from the rear storage portion of the system. A cooling unit is provided that includes a fan and two sets of refrigerating coils. The cooling unit provides refrigerated air from one set of coils to an air conduit for establishing a primary air curtain across the front of the display portion. The refrigerated air from the other set of coils is supplied to an air conduit which in turn supplies the air to the storage portion. A second air curtain is also provided across the front of the display portion; this secondary air curtain extends along a path positioned towards the outside of the display portion with respect to the primary air curtain. A return path for the air from the primary and secondary air curtain is provided along the bottom of the display portion.

Abstract: An improved beverage container holder manufactured by a process including the steps of providing a cylindrical outer cup of foam material and press fitting a cylindrical inner cup within the outer cup after filling the annulus formed therebetween with a refreezable fluid. The cylindrical inner cup includes a radially extending flanged region at the open end which comprises an inwardly and downwardly tapered rib circumferentially disposed about the cup for engaging and becoming embedded within the side walls of the cylindrical outer cup to form a cylindrical seal therearound. A resilient outer ring means is snapped over the juncture between the respective open ends of the inner and outer cup to secure the seal therebetween.

Abstract: An improvement in post-type earrings, which are earrings connected to a human ear by a rigid slender short rod or post which extends from an ornament, and is rectilinear and cylindrical. The post is threaded at the end opposite to the ornament, and a clutch having a conical configuration formed by a concave base and a plurality of radial springy fingers is provided. The clutch is pushed onto the post, whereby the tips of the fingers engage the convolutions of the helical threading, and the clutch may only be removed by unscrewing it off of the post. The present clutch configuration features a terminal tip of each springy finger having a terminal lip portion which diverges away from the direction of curvature of the finger, so that the lips define, in combination, an opening from which the springy fingers extend radially, and through which the post is threaded when the earring is mounted to the ear.

Abstract: A threaded cap for sealing an automotive vehicle fuel tank is provided with a unitary molded central plastic core and a bonnet rotatably mounted on the plastic core. A pair of concentric races are defined on the plastic core. The inner race carries a unitary molded plastic frame which has a pair of resilient, closely spaced transverse cantilevered arms defining a gap therebetween. The frame is also provided with a resilient catch. A unitary molded plastic bolt is reciprocally movable along the gap to engage and disengage the core for rotation with the bonnet. The bolt has two detents which coact with the catch on the frame to hold the bolt at selected unlocking and locking dispositions of movement. The bolt includes a stud which projects into the gap between the arms so that the arms spring bias the bolt toward the locking disposition. A lock mechanism is used to shift the bolt to an unlocking disposition so that the fuel cap be disengaged from the fuel tank inlet pipe.

Abstract: A method of and apparatus for rolling metal strips in a rolling mill having a 4-high roll stand and a tension roll stand comprising a plurality of pairs of combined rollers. The method comprises advancing the metal strips through the 4-high roll stand and tension roll stand, so that the strip extends between the roller of each pair of combined rollers and is partially wrapped around each of the rollers. The rollers of each pair are rotated in opposite directions at a pre-determined circumferential differential speed ratio.

Abstract: A method of controlling roll eccentricity of a rolling mill is disclosed, in which a component of a rolling load variation which is due to eccentricities of an upper and a lower backup rolls of the rolling mill is obtained as a first eccentricity compensation signal by removing a rolling load variation component due to a variation of thickness of a material to be rolled from a rolling load variation occurred during the rolling operation, a rolling load variation value due to the roll eccentricity of the backup rolls is obtained from a rolling load variation occurred during rotations of work rolls which are in contact with each other under a load and is memorized as a second roll eccentricity compensation signal, a first signal is obtained by multiplying the first roll eccentricity compensation signal with a coefficient which is larger than 0 and smaller than 1, a second signal is obtained by multiplying the second roll eccentricity compensation signal with another coefficient which is larger than 0 and smalle

Abstract: A method of forming a permanent curve in a length of convoluted wire-reinforced flexible plastics tubing comprises the steps of first flexing the chosen region of the tube into a curve whose radius is tighter than that eventually desired; forcibly holding said region in said tighter than desired curves; applying to the tube an internal pressure which is insufficient to burst the tube but which is high enough to strain the wire-reinforcement, the tube material, or both, in the bend region beyond its or their elastic limit; maintaining said internal pressure for a finite period of time; releasing the pressure; and finally releasing the tube from its preheld curve.

Abstract: The invention provides for a method of and an apparatus for manufacturing finned tubing from tubular metal fin stock in which the fin stock is in axially continuous form. There are provided at least two finned regions on the fin stock between which there is interposed at least one finless region. A plurality of rollers are employed which are drivably mounted on arbors spaced about the fin stock. Each roller includes a plurality of axially arranged forming discs, the discs on the arbors tracking each other in axially spaced groups, and the diameters of the forming discs in each tracking group on the arbors having different diameters. The fin in a finned region is developed to its full height over an axial distance of the fin stock equal to from 0.40 to 0.75 of the outside diameter of the fully developed fin.

Abstract: The invention relates to a device for forming a collar around a hole in the wall of a pipe. The device comprises a rotary body (8) which in a plane perpendicular to the rotary shaft is elliptical in cross-section and in the plane of the rotary shaft substantially circular in cross-section. The body is provided with curved support surfaces (12) located in the plane of the rotary shaft, collaring means (14) being movable along said surfaces from an inserting position adjacent to the rotary shaft to a collaring position in a point on the body with the biggest elliptical cross-section.

Abstract: A metal pipe forming mill progressively forms a flat metal sheet into a circular form along the mill axis by forming rolls including pairs of cage rolls. A cage-roll unit in this type of mill has a pair of movable bases disposed on both sides of the mill axis, with the space between the two movable bases being freely adjustable, and a pair of stands mounted on the movable bases, one on each. The stands rotatably support, on their surfaces facing the mill axis, two or more pairs of cage rolls, one pair following another along the mill line.