Abstract: A rolling method and machine provides for decreasing the rolling load of work rolls of a rolling mill for a given reduction ratio achieved thereby. A pair of pinch rolls upstream of the work rolls have projections that form a large number of recesses in one or both surfaces of a metal workpiece. A lubricating agent is forced into the recesses in the region of contact between the workpiece and the work rolls. As a result, when the workpiece is rolled by the work rolls the lubricating agent is retained in the recesses such that the recesses progressively are flattened, thereby causing the lubricating agent to form a boundary film between the portion of the workpiece being rolled and the work rolls. The recesses are controlled to regulate the dimension of the length of each recess in the direction of rolling of the workpiece, to regulate the inclination of front and rear walls of each recess, and to regulate the total area of the recesses relative to the total surface area of the workpiece.

Abstract: A method and apparatus for cutting corrugated webs from a strip which is continuously formed to define undulating fins or corrugations extending transversely of the strip. The method and apparatus comprise periodically interrupting the movement of the corrugated strip, spreading a corrugation in the direction of the longitudinal axis of the strip and severing the corrugation at the spread corrugation and the apex of the corrugation. More specifically the corrugated strip is interrupted, the adjacent corrugations are moved longitudinally relative one another to locate the corrugation to be cut and a cutter is moved between the adjacent apices to cut the connecting oppositely disposed apex. In one form adjacent apices are engaged and spread apart. In another form, a finger engages a side of a corrugation to position the corrugation to be cut.

Abstract: A method of machining an oblong workpiece, which is placed substantially radially in a holding ring and is deformed by cooperation with a roller rotating in the holding ring. In connection with machining of a relatively large amount of material, the workpiece is caused to cooperate with a plurality of differently shaped areas on the surface of the roller. The method is performed by a machine which comprises a rotating holding ring for substantially radial retention of the workpieces. The machine comprises a rotating roller which is placed inside the holding ring and is adapted to machine the radially inwardly directed end of the workpieces. At least two differently shaped types of the machining areas are provided along the surface of the roller, said areas being so disposed that the various types are present radially opposite a workpiece in a predetermined succession at least at the same time as the holding ring performs a corresponding number of entire revolutions.

Abstract: A web handling apparatus for supplying material to a metal forming machine wherein an uncoiler unit is mounted on a frame to draw metal web from a coil. A pivot support is mounted on the frame and supports a dancer arm with a track roller assembly. The dancer arm is pivoted to the roller assembly at one end and is connected to a pivot support at the other end in a manner such that the arm is capable of relative movement axially with respect to the pivot. Movement of the track roller assembly is limited to a vertical path by a pair of vertical tracks on the frame. The pivot support is connected to a rotary transducer for controlling the speed of drive rolls which regulate the delivery of metal web into the metal forming machine.

Abstract: A support surface, particularly for the tread of passenger conveyers, as anti-slip, strengthening and wear resistant grooves deformed in the top portion of cleats formed by corrugating metal.

Abstract: To produce an I-section (1) rolled in one piece, of which part (9) of the web (3) is corrugated, the section is passed between two rolls having an increased diameter over a portion of length, and it is subsequently passed between two rollers having a structured surface, so as to carry out a continuous uniform folding.

Abstract: A method of making a rock bolt (1) with a thread on a section thereof comprising the steps of; providing a metal bar of circular or near circular cross-section having a diameter which is substantially equal to the pitch diameter of the thread to be provided thereon; passing the bar in a single pass between a pair of rolls (8, 9) to pinch the bar at intervals to cold form protrusions (2) spaced from one another in staggered formation on opposite sides of the bar along a selected section thereof; displacing one or more of said rolls (8, 9) away from the other at a selected time to ensure that said protrusions are formed only on said selected section of bar; straightening the bar in its cold condition; and cold rolling in a thread (4) with said pitch diameter on a further selected section of the bar which is free of the said protrusions.

Abstract: In the production of a hot-rolled steel bar, such as a concrete reinforcing bar, a continuous thread is formed on the bar. The thread is arranged so that an anchoring or connecting member with a female thread can be screwed onto the male thread formed on the bar. Initially, first ribs are hot rolled on the bar surface with the ribs located on opposite sides of the bar and extending only for a portion of the circumference of the bar. Immediately following the formation of the first ribs, second ribs are hot rolled extending between and interconnecting the first ribs whereby the first and second ribs form a continuous thread. The ribs are formed in a unit made up of adjacent roll stands, each containing two rolls, the axes of the rolls in one stand are offset by 90.degree. to the axes of the rolls in the other stand. The rolls are interconnected so as to move together. The rolls in each roll stand form a roll gap with shaped surfaces on the rolls for defining the partial ribs forming the continuous thread.

Abstract: A machine for corrugating lengths of continuous strip stock that includes first and second sets of corrugation-forming rollers for receiving strip stock from associated coil rolls and feeding corrugating stock to vertically spaced slots in a shared cutting station. Running length of each corrugated strip is measured and the cutting station is controlled so as to obtain severed stock sections of predetermined lengths, which may be variably programmed in a predetermined sequence. The cutting station includes a stationary plate having vertically spaced strip-receiving slots, and a pair of shear blades integrally formed on a shear plate selectively driven by the machine controller through a cycloidal drive mechanism.

Abstract: An apparatus and process is provided for forming a helical barbed tape. The process first involves supplying rolled steel which is passed to an apparatus for blanking barbs and cutting the steel into strips. The strips are mounted on individual cassettes. The tape subsequently is fed from a cassette to a barb sensor and barb setter. The barb setter moves with the tape to effect the required offset in response to the sensed presence of a barb cluster. The tape then advances to a roll former which exerts a controlled differential pressure on opposed sides of the tape to create a uniform circular coil. The tape will have an unequal thickness across its width with the differential thickness being substantially uniform along the length of the tape.

Abstract: Apparatus for corrugating a length of strip metal to form a series of zig-zag folds in the strip has counter rotating forming dies for forming a series of equally spaced apart impressions in the strip and counter rotating corrugating dies for forming the zig-zag folds in the strip intermediate adjacent impressions. The apparatus includes a clutch for selectively disengaging the drive for the corrugating dies to permit adjustment in the phase relationship of the rotation of the corrugating dies relative to the forming dies while the apparatus is in operation. This permits adjustment while the machine is operating to compensate for variations in physical characteristics of the material feed.

Abstract: A machine for making concrete reinforcing bars, known as rebars, from wire stock having a round cross section. A preform roller station cold works the round cross section of the wire stock into the shape of a polygon. A first form roller station cold works the polygonal cross section into a cross section having a central core and radial fin members extending therefrom. A second form roller station further reduces the diameter of the central core, and further increases the radial extent of the fin members. A third form roller station reduces the core still further, and again increases the radial extent of the fins, imparts shoulder members that provide an anti-longitudinal slip function at preselected intervals along the extent of the rebar, and roughens the rebar.

Abstract: A corrugating web forming apparatus for receiving selectively a plurality of webs of flat material and slitting each of said webs to form two strips which are thereafter shaped to form corrugations and severed to form shaped portions having predetermined lengths, predetermined height and predetermined spacing between the corrugations which comprises a slitting station including at least two sets of slitting rolls adapted to be used selectively for slitting a respective web, a forming station including at least two sets of forming rolls for transversely corrugating two strips severed from a web simultaneously, a plurality of longitudinally roll pack stations comprising at least two sets of forming rolls for controlling the longitudinally spacing between the corrugations on the strips, a web control station including at least two sets of rolls for engaging and intermittently interrupting the movement of the corrugated strips, and a cutting station for cutting predetermined lengths from said corrugated strips.

Abstract: There are disclosed a method and apparatus for forming a sinuous lead wire (30) used for efficiently obtaining U-shaped lead wires (5) which serve as a lead wire material for a ceramic capacitor (1) having two terminal lead wires (3, 4). For forming such sinuous lead wire, first and second pin series (23, 24, 70, 71) are used which comprise respective pluralities of pins (21, 22, 63, 64) arranged with an equal pitch and which are arranged in two rows shifted by a half pitch from each other. Each pin series is moved in such a manner that each pin in one series enters between two adjacent pins in the other series. As a result of such pin movement, a material lead wire disposed between the first and second pin series is sinuously deformed.

Abstract: In an apparatus for rolling metal ribbon stock into convoluted fin strip for use in heat exchangers, an uncoiler apparatus comprising a base, a pair of coil supports for supporting a pair of coils of sheet metal ribbon stock. The coil supports are mounted on a plate which is rotatable about a vertical axis so that when the plate is rotated, one coil support is moved into driving engagement with the motor and the other coil support is moved out of driving engagement with the motor. A control system interconnects the drive of the motor on the uncoiler apparatus with the drive of the remainder of the corrugated fin rolling machine for positively driving the uncoiler as a function of machine speed.

Abstract: An I-beam is made lighter in weight by corrugating the central portion of its web. Dimension of the corrugating is determined by predetermined experimental equations. The corrugating work is performed by a pair of complementary intermeshing rolls having the same dimensions.

Abstract: An apparatus, for forming fins for heat exchangers, comprising a pair of rolls which are provided, on the outer peripheral surfaces thereof, with grooves of a pattern corresponding to the shape of the fins to be formed therebetween and which form them by pressing the fins from opposite sides thereof with the aid of the synchronous rotation of the rolls to give smooth curved outer surfaces thereon, characterized in that the grooves on the rolls are formed so that each groove may be composed of a bottom portion having a substantially arcuate shape and a tapered portion converging from the outer peripheral surface toward the bottom portion of the roll as viewed in section, and at least one roll of the pair of rolls is provided with an urging means for pressing the aforesaid roll against the other roll at a constant pressure.

Abstract: Flat metal strip of indeterminate length is apertured in a punch press having a flying die set to define a lengthwise succession of identical workpiece blanks connected by strap-like portions of the strip adjacent to its longitudinal edges. That press, each time it operates, makes two apertures that define respective end edges of a blank. The strip is pulled lengthwise through that press by roller forming apparatus which imparts a predetermined transverse profile to it and propels it through a flying shear press whereby each blank is severed from the rest of the strip. On a conveyor having two stretches bridged by the severed blank and moving faster than the strip the severed blank is carried to a folding press. There a ram rises from between the conveyor stretches, lifting the blank off of the conveyor and clamping it against a folding die.

Abstract: A method for continuously producing a core member to be embedded within a trim, comprises the continuous steps of forming slits in a band-shaped metallic plate by means of slitting rolls, elongating the slit metallic plate by means of elongating rolls and pressing the elongated metallic plate by means of finishing rolls.

Abstract: A machine on which metal ribbon stock is corrugated has a toothed feed roll which engages the corrugated strip between successive corrugations to advance the strip lengthwise. Downstream from the feed roll is arranged one or more rotary-driven, toothed, unpacking rolls that are rotatably adjustable relative to the feed roll to stretch the corrugated strip advanced by the feed roll a predetermined amount so that, when the strip is cut to length at a further downstream station, it will have the desired number of corrugations per unit length.

Abstract: Panel forming apparatus for producing a curved panel from a straight panel disclosed has first and second pairs of wall-indenting dies (281, 282 and 283, 284) spaced from one another to receive therebetween each inclined sidewall portion of a straight panel. A hydraulic motor (M1) is coupled by a power train to rotate said first pair of wall-indenting dies. A hydraulic motor (M2) is coupled by a second power train to rotate the second pair of wall-indenting dies. A third pair of wall-indenting dies (121, 122) is located downstream of the first-mentioned pairs of dies to receive the intermediate wall portion of the panel between each of the third pairs and engage the intermediate wall portion of the panel after it has passed through the first-mentioned pairs of dies. A third hydraulic motor (M3) is coupled by a third power train to rotate the third pair of wall-indenting dies. A tank 301 and pumps (P1, P2) deliver fluid under pressure to the motors.

Abstract: A metal slat for use in a venetian-type blind including an embossed rib formed at each narrowed slat material region adjacent the cord receiving slots. The slat also includes a decorative weave pattern comprising a plurality of separated longitudinal rows of embossed ribs formed on the slat in a continuous in-and-out pattern.Also disclosed is apparatus for forming the embossment weave pattern concurrent with forming the crown configuration of the slat. The apparatus includes a first rotary die arrangement for prestretching of at least one localized region of a continuous flat metal strip passing therethrough, a second rotary die arrangement for simultaneously forming the strip into a crown configuration and forming the embossment pattern therein, and a third die arrangement for compensating out of the strip any bow, side curve or twist.

Abstract: A machine for continuously punching, shearing and forming sheet material comprises a frame and punching, shearing, and forming stations. Rollers are provided for continuously feeding sheet material through the stations. A cam periodically engages the tools of the respective punching and shearing stations to actuate the respective punching and shearing operations and simultaneously to advance the respective punching and shearing stations in unison with the direction of feed of the sheet material. The forming station includes adjustable rollers which permit adjustment of the space between the rollers. The method of the present invention comprises continuously feeding the sheet material through the punching, shearing, and forming stations. At the punching and shearing stations, the tools for punching and shearing the sheet material move in unison with the sheet material during the time that they are performing their punching and shearing operations, respectively.

Abstract: An apparatus used for the paper clip making machine downstream of the cutting machine comprises, a set of conveyors including continuous belt continuous chains, transferring wheels for advancing the cut wires, pieces of magnet properly located on the conveyors for attracting and arraying the cut wire in a proper orientation, three annular members spaced apart and mounted for rotation on the same axis, each of the annular members having a plurality of forming die member on the rim thereof for receiving and engaging cut wires, three segmented ring members of different lengths provided along the circumferences of corresponding annular members, ramming means provided at two sides of the annular member assembly adapted to exert bending forces on cut wires in the direction parallel to the axis of the annular member, the die members intermittently rising from the rim of the annular member to cooperate with the ramming means to bend the cut wires about the segmented ring members.

Abstract: Multi-aperture ventilated floor members, for use in a grain bin or like applications, are formed from continuous sheet metal strip stock, complete, in one pass through a cold roll forming machine, in a method in which the critical steps comprise roll-lancing the metal strip to form multiple closed slits transversely of the length of the strip and then roll corrugating the strip transversely of its length to widen the slits into narrow open ventilation slots by stretching the metal, simultaneously ironing out the projections formed when the slits are lanced into the strip.

Abstract: A novel panel and panel assembly for use in building-type structures, together with panel forming apparatus are disclosed which are especially suitable for using portable, point-of-use, continuously operable, roll-forming techniques. The panel is characterized by upwardly diverging inclined sidewall portions (26, 27), wing portions (28, 29) of substantial lateral extent in relation to an intermediate wall portion that forms the bottom thereof, and centered edge fastening structure (31, 32). This panel provides a greater panel width per sheet stock width, ease of assembly, spacing and tracking surfaces for continuous edge seaming, and balanced strength with respect to loading. The panel assembly has continuous seam structure (54) with abutting inclined side sections (41, 47) and centered interlocking lateral flange portions (46, 53).

Abstract: A machine for producing metal drape panels having integral male and female hinge means formed therein at preselected intervals and a preselected cross-sectional profile. A first machine and method stage employs a plurality of rotary die stations to cut initial hinge patterns for the male and female hinge means and to equalize out of the strip any remanant curl or side curve while stretching the strip to increase the interval between initial hinge patterns to a final preselected interval. A second machine stage employs a plurality of punch die stations for forming the initial hinge pattern on the strip into final male and female hinge means and a shaping-compensating die station for simultaneously shaping the preselected cross-sectional profile and compensating out of the strip any inherent remaining curl or twist therein.

Abstract: A method of shaping metal in the form of a parallel-sided elongate sheet to make from it a formed profile that is of uniform cross-section except that at least one longitudinal edge is worked to generate a repeating pattern along its length, comprising cold working the metal sheet successively (a) by rolling to increase the width of the sheet, (b) with one or more than one knurling wheel that generates the repeating pattern in the longitudinal edge or edges of the metal sheet and at the same time reduces the width of the metal sheet to substantially its original value, and (c) by roll-forming (b) to the said profile, which may for example be a channel of substantially U-shaped cross-section.

Abstract: Billets of hot steel are hot rolled through a series of rolling stands to form an elongated flat. This flat is first worked to a predetermined thickness and width and then subjected to an edging pass at a succeeding stand. The edging pass is comprised of a pair of rolls having spaced apart, aligned grooves to receive the flats. The groove in one of the rolls is provided with a plurality of holes having certain characteristics. The depths of the roll grooves, the distance they are spaced apart, the depth and other characteristics of the holes provided in the one grooved roll and the widths of the roll grooves are all adjusted with respect to the predetermined dimensions of the flats entering the edging pass so that desired serrations are imparted to the flat as it passes through the edging pass. A final flat pass may be utilized to finalize the dimensions of the finished, serrated flat. The holes are cut into the roll groove by electric discharge machining.

Abstract: A method and an apparatus are disclosed for forming expanded mesh sheet from deformable strip by the steps of concurrently slitting and preforming the strip to provide transverse bands of slit and elongated wire segments projecting alternately from opposite sides of the plane of the strip separated by transverse bands of unslit strip, slitting the strip at alternate bands to extend slit segments in a staggered relation and laterally expanding the slit and preformed strip. Concurrent slitting and preforming and subsequent slitting can be effected by a cluster of three rolls or by a linear arrangement of pairs of opposed rolls.The invention has particular utility in forming expanded mesh sheet of exact final dimensions for use as battery grids from lead or lead alloy strip.

Abstract: A process and apparatus for uniformly compressing pre-crimped electric conductive metal foil ribbon to achieve a high density of crimps per unit length and an increased ratio of crimp depth-to-pitch between successive crimps is disclosed. The apparatus forms an elongated passageway adapted to slidably receive a crimped foil ribbon therein. The bottom portion of a pre-crimped foil ribbon positioned in the passageway is releasably held in place. A probe is inserted through a slot in the cover plate on the apparatus into a crimp in the ribbon and the probe and crimps are moved toward the portion of the ribbon being held in place to compress the moved crimped portion.Release of holding pressure on the bottom portion of the foil ribbon allows the compressed foil to be advanced and the process is repeated until the desired length of compressed crimped foil is produced.

Abstract: Clips adapted to be subsequently employed in tying the necks of bags and the like are formed in a continuous ribbon of metallic material and adapted to be wound on a reel for subsequent use as ties. A continuous ribbon of flat material is bent alternately in opposite directions at spaced points along its length to form a continuous length of generally sinusoidal-shaped similar connected elements so that substantially all of the deformation of the material takes place when the approaching end of the ribbon is free and thus not subject to being stretched or compressed except so far as these deformations take place during the bending process.

Abstract: A web of undulate wire is converted into a series of coherent C-shaped binders of the type known by the trademark Wire-O and used to bind stacks of paper sheets or the like in the making of steno pads, brochures, calendars and similar stationery products by continuously moving the web lengthwise at a constant or variable speed, by imparting to successive increments of one marginal portion of the moving web a concavo-convex shape in stepwise fashion so that the one marginal portion resembles (in cross-section) one-half of the letter C, and by thereupon imparting to successive increments of the other marginal portion of the moving web a concavo-convex shape in stepwise fashion so that the thus converted other marginal portion becomes a mirror image of the converted one marginal portion. The imparting steps include deforming the respective marginal portions from the inner toward the outer edges thereof.

Abstract: Apparatus for forming corrugated sheet material includes coacting rolls (10,11) by which material having corrugations with crests and intervening flanks is formed. The crests are closed up to one another by a first pair of rollers (22) which run at relatively high speed followed by a second pair of rollers (27) which run at a relatively low speed. The rollers engage the crests or the side edges of the material to control the rate of feed of the material between each pair of rollers.The invention finds application in forming corrugated metal sheet for heat exchangers.

Abstract: A pair of die rolls of novel construction are disclosed which act upon a continuous wire having a preliminary zig zag formation in order to impact the bends in the wire and thus narrow the formation, preparatory to use of the wire as a ring binder. Each roll has a continuous spiral groove with a first section of progressively narrowing width which is substantially wider than the wire bend which it accommodates, and a second section of constant width. A knob or projection is formed on at least one side wall of the groove in each roll at the juncture of the first and second sections, which impacts the wire bend as it passes, giving it a set.

Abstract: An improved method and apparatus for fabricating reticular sheet material utilizes dies for shearing a sheet of metal into interconnected strands, mandrels for bending alternate interconnections of the metal in opposite directions to form ridges and valleys between the strands, and inserting punches into the sheared areas between strands while holding the ridges with other punches to form uniform openings in the areas between the strands.

Abstract: The method comprises the steps of: forming one or more sheets of material in a single sheet of material with at least one generally planar region and at least one region of first corrugations. Second corrugations which are smaller than the first corrugations are then superimposed on the, or each, generally planar region and the, or each, corrugated region. The generally planar region, or regions are then laid onto the region, or regions that are provided with the first corrugations.

Abstract: A method of deep embossing of sheet material, generally metal, is disclosed. A small scale relief pattern is first embossed across the entire sheet and thereafter a deep embossment of spaced-apart protuberances is imparted to the sheet. Both patterns in combination produce a sheet useful for reflective thermal insulation without the risk of significantly puncturing the sheet.

Abstract: Improved metallic rod product which substantially reduces die wear in wire drawing operations, and which provides other advantages during manufacturing. The exterior surface of the rod product is intentionally provided with a predetermined rough texture having certain characteristics, rather than the smooth bright surface conventionally imparted to metallic rod product intended for subsequent drawing into wire. Certain textured surface characteristics of the rod product reduce wear on the first few wire drawing dies by entraining lubricant as the rod moves through the dies, and carry the entrained lubricant into the dies, while at the same time avoiding some common wire drawing defects such as flakes and slivers. The textured-surface rod thus reduces frictional wear of the drawing dies, so that less force is required to draw the rod product through the dies and the useful life of the drawing dies is increased.

Abstract: A method and an apparatus for producing openings in sheet metal material being provided in band form as well as a perforated sheet material produced by said method. The method comprises providing notches in the sheet material and stretching partial areas of the notched sheet material by a thickness-reducing processing step, whereby the notches which lie between the stretched partial areas of the notched sheet material are enlarged to form openings. The apparatus for producing openings in sheet metal material comprises roller means for producing notches in the sheet material and roller means for stretching partial areas of the notched sheet material by thickness reduction. The resulting perforated sheet metal material combines the advantages of punched sheet metal, i.e., mechanical stability, and expanded metal mesh, i.e., no loss of material during production of the openings in the sheet material.

Abstract: Apparatus for shearing blanks from elongated workpieces and for pressing such blanks into screw blanks, bolts or the like in a continuous operation comprises a plurality of preferably cylindrical rotary elements, rotatable about parallel axes in such a manner that cooperating pairs of rotatable elements are rotated in opposite direction and so that blank receiving members on the rotary elements of each cooperating pair becomes successively aligned with each other. The plurality of rotary elements includes a central rotary element receiving sheared-off blanks and retaining the same during the pressing thereof until the final discharge, and a plurality of additional rotary elements arranged about the circumference of the central rotary element.

Abstract: A method of deep embossing of sheet material, generally metal, is disclosed. A small scale relief pattern is first embossed across the entire sheet and thereafter a deep embossment of spaced-apart protuberances is imparted to the sheet. Both patterns in combination produce a sheet useful for reflective thermal insulation without the risk of significantly puncturing the sheet.

Abstract: An apparatus for bending sheet metal wherein a plurality of forming rolls are utilized. The rolls are situated at succeeding stations, and a first bending station includes a roll having forming protrusions in spaced apart relationship on the roll surface. The roll also defines drive elements which are engageable by the sheet so that movement of the sheet against a roll drive element operates to drive the roll and to thus move a forming protrusion into contact with the sheet for bending the sheet. Shift means are associated with this roll for locating the drive elements and protrusions in different positions to thereby control the particular drive element engaged by the sheet whereby the particular forming protrusion which performs the bending function can be pre-selected.

Abstract: In a method and apparatus for producing sheets or plates by hot rolling slabs in a number of passes, the slabs are alternately deformed more strongly and less strongly between a pair of rolls at least in one pass, and when the slabs are less strongly deformed, a condition according to which .alpha.' is equal to or smaller than .rho. is observed, while when the slabs are more strongly deformed, a condition according to which .rho. is smaller than .alpha. smaller than 2 .rho. is observed, .alpha. and .alpha.' being the angles of engagement and .rho. being the angle of friction, and differences in thickness in longitudinal direction of the slabs are levelled out in a subsequent pass.

Abstract: A method of producing a metal bar having one edge serrated wherein a billet work-piece of metal is heated and passed through stands of a hot rolling mill so as to elongate the billet into a bar and form the bar to a generally rectangular shape, supporting the side faces of the bar in a notching stand near the output end of the mill, supporting one edge of the work-piece in the notching stand by one roll of that stand, forming serrations in the other edge of the bar in the working zone by engaging that other edge with outstanding teeth of the second roll, and subsequently passing the work-piece through a further stand to flatten the work-piece side faces and size the work-piece.

Abstract: This specification discloses strip sheet metal panels formed with transverse indentations and longitudinal formations formed therein, with end portions at each end of said panels being free of said transverse indentations;And a method of cold rolling strip sheet metal to form both transverse and longitudinal indentations and formations therein, and discontinuing formation of said transverse indentations at predetermined spaced intervals along such sheet metal, and shearing the sheet metal in measured relation to such spaced intervals;And further dicloses apparatus for embossing sheet metal, in a sheet metal forming line adapted to form both transverse and longitudinal indentations in said sheet metal, and in which said forming line includes sheet metal delivery means, and a plurality of sheet metal roller stands for forming said longitudinal indentations and in which said embossing apparatus incorporates tension roll means located and adapted to receive said sheet metal from said sheet metal delivery means, e

Abstract: A machine for manufacturing herringbone-pleated structures of a type particularly suitable for use in cylindrical or flat filter elements. The machine includes consecutive feeding forming and bunching components by which a continuous band of flat sheet material, which may be pre-pleated longitudinally, is fed between a pair of endless forming assemblies which cooperate to form continuously a roughed-out shape of the final herringbone-pleated structure and which also advance to a bunching means positioned downstream from the forming assemblies. The bunching means operates to tighten up the folds of the roughed-out shape both longitudinally and transversely to provide the final structure.

Abstract: A method and apparatus for rolling metal ribbon stock into convoluted fin strip for use in heat exchangers is disclosed. The passageways defined by adjacent convolutions may be of zig-zag shape in a direction transversely of the strip by reason of the fact that the form rolls are designed such that the return bent portions connecting successive convolutions are initially formed as two symmetrical half sections separated by a sharp bend line extending transversely along the centerline thereof. After the strip emerges from between the form rolls it is gathered or compressed lengthwise in a conventional manner so that further bending of the convolutions is localized along said sharp straight bend lines.

Abstract: A new and improved serrated grating bar is produced directly from coiled strip workstock by applying torque to a toothed notching wheel to draw the strip between the toothed wheel and a bearing wheel spaced apart a distance less than the width of the strip, and by simultaneously confining the lateral faces of the strip to preclude the metal displaced by the teeth from flowing transverse thereto. Apparatus suitable for this purpose includes a toothed wheel flanked on either side by flat discs which extend radially beyond the teeth, a grooved bearing wheel spaced therefrom a distance less than the width of the strip, and means for rotating the toothed wheel. No separate edgers, flatteners or punch presses are required.

Abstract: An apparatus and method for forming an indefinite length of flat strip material into a chevron-shaped matrix strip element used in the fabrication of a heat exchange matrix disk for a rotary regenerator heat exchange apparatus, or similar device, in which the chevron matrix strip is formed by passing the flat strip material between the mating shaped teeth of a pair of preforming rolls which preform the chevron shape and coin chevron break lines in this material, the thus preformed matrix strip then being advanced through a guide passage between a pair of gathering rolls which feed (gather-form) the matrix strip and at the exit of this passage a pair of indexing rolls are positioned to control (index) the matrix feed-out of the passage, all of these elements being suitably supported on a suitable frame with the separate sets of rolls being driven in predetermined timed relation to each other.