Abstract: The present invention includes a saw table, which can be converted into a parallelogram position. Converting the saw table into a parallelogram position allows for the angle of the blade relative to the fence and work-piece to change with ease. This invention also comprises an adjustable blade guard, which facilitates various cuts on or through work-pieces with minimal efforts.

Abstract: A paper discharging apparatus contains a movable mechanism and a control unit. The movable mechanism moves a surface part between a first position that the surface part is not contacted with a pinch roller and a second position that the surface part is contacted with the pinch roller through a paper so as to push the pinch roller; the control unit moves the surface part to the second position, clamps the paper by the pinch roller and the surface part, and conveys the paper, thereby bending the paper, and which moves the surface part to the first position and clamps the paper by the pinch roller and a feeding roller, and rotates the feeding roller, thereby discharging the paper from the conveyance path.

Abstract: A method of delivering a withdrawal cord to a transfer member, wherein the method includes providing a supply path fluidly connected to a metered cord supply. The supply path comprises a pressure source, a transfer member, and a cutting apparatus. The transfer member comprises a first surface, a second surface, and a plurality of orifices on the first surface. The method also comprises moving a deployed cord supply towards the transfer member through the supply path by a fluid flow generated by the pressure source. The method further comprises moving a portion of the deployed cord supply into an orifice of the transfer member, moving the deployed cord supply to an attachment system, connecting the deployed cord supply to a substrate, and cutting the deployed cord supply to create a withdrawal cord comprising a first end and a second end; wherein a portion of the withdrawal cord is in the orifice to the transfer member.

Abstract: A method and programmed apparatus for cutting graphics from substantially-identical sheets with graphics and registration marks printed thereon using a plotter and controlled cutter and sensor movable over the sheets, including: (1) sensing work-surface positions of the marks of a sheet and calculating an expected work-surface position for each such mark based on the work-surface positions of other marks of the sheet; (2) classifying each mark as active or inactive based on a first error criterion and applying the classification to corresponding marks of a subsequent sheet, the active marks being fewer than the total number of printed marks; (3) sensing the work-surface positions of the active marks of the subsequent sheet; and (4) cutting the graphics from the subsequent sheet based on the sensed positions of the active marks, thereby reducing the time for accurate cut-processing of the subsequent sheet.

Abstract: A disposable set of components for an organ perfusion system comprising a fluid supply duct for supplying fluid to the organ, a fluid removal duct for removing fluid from the organ, and a surrogate organ removably connected between the fluid supply duct and the fluid removal duct so as to form a fluid circuit, so that fluid can be circulated in the circuit in preparation for connection of the organ.

Abstract: A letter opener comprises a housing which is sized to be conveniently held in one hand. An externally accessible groove extends along a side of the housing, the groove having an upper wall, a bottom wall, and a side wall. A blade partially protrudes into the groove through the upper wall at a distance from the side wall. A rocker is provided which can rotate around a rocker axis. The rocker comprises a front section forward of the rocker axis and a rear section rearward of the rocker axis. The front section of the rocker is arranged opposite the blade and, in use, pushes an envelope into the blade.

Abstract: A carrier device (10) is for handling a lens (12) which is received therein and which has a lateral edge (21), in particular for handling an eyeglass lens (12) in a machining or finishing process. The carrier device (10) comprises a main body (14) and has a connecting member (24) for releasably connecting the main body (14) to the received lens (12). The connecting member (24) forms, with the main body (14), a protective cover (15) surrounding the lateral edge (21) of the received lens (12) and a surface (30) of the received lens (12) directed toward the main body (14). The connecting member (24) is releasably connected to the main body (14).

Abstract: An edge narrowing method for a display panel is disclosed. The method includes the steps of providing the display panel, a grinding apparatus and a polishing apparatus; tilting the display panel so that the first substrate and a grinding member of the grinding apparatus have a first grinding angle therebetween; grinding the first substrate and the light-shielding area with the grinding apparatus while the display panel is tilted at the first grinding angle, thereby forming a first grinding end surface; stopping grinding of the first substrate and the light-shielding area when the width of the light-shielding area is between 0.35 and 1 mm; and polishing the first grinding end surface with the polishing apparatus to form a first end surface.

Abstract: A finishing apparatus for ductwork having a duct body with at least one open end. The finishing apparatus includes an operation platform for selectively supporting the ductwork and a first wrapping mechanism integrated with the operation platform, the first wrapping mechanism including a first dispenser for dispensing a first film. The finishing apparatus further includes a first cutting mechanism integrated with the first wrapping mechanism. In operation, the first wrapping mechanism selectively dispenses the first film adjacent to and against the open end of the ductwork as the ductwork is moved a predetermined distance down the operation platform. The first cutting mechanism selectively cutting the first film after the ductwork has moved the predetermined distance down the operation platform.

Abstract: A method of cutting a wafer of composite core from a bulk composite core includes stabilizing the bulk composite core with a fixture, the bulk composite core having a plurality of tube members. The method also includes cutting through each of the tube members to create the wafer while the bulk composite core is stabilized by the fixture.

Abstract: A method for controlling a sawing machine with a sawing tool, which is driven by an electrical sawing tool drive with a first frequency converter, and with a sawing feed device for moving the driven sawing tool at a feed rate in relation to a workpiece to be sawn, and also to such a sawing machine. The feed rate is changed over from an idling feed rate to a working feed rate when the sawing tool engages in the workpiece. A value of a physical variable which corresponds to the torque transferred from the sawing tool drive to the sawing tool or from which a change in this torque can be calculated is determined here at the first frequency converter. The changeover from the idling feed rate to the working feed rate takes place in dependence on the value of this physical variable.

Abstract: It is disclosed an industrial slicer of a food product. The slicer comprises means for guiding and conveying the food product along a conveying direction, comprises means for pressing the food product against the guiding and conveying means, wherein the minimum distance between the pressing means and the guiding and conveying means is configurable, comprises means for cutting the food product into a plurality of pieces according to a configured cutting pitch, comprises pre-pressing means for exerting a pressure value on the food product and comprises a control unit. The control unit is configured to calculate a number of cutting pieces. The cutting means are configured to cut the pressed food product into a number of pieces equal to the calculated number of cutting pieces.

Abstract: A method of pre-controlling the shapes of a continuous-casting slab head and tail for reducing the cut amount of the head and tail of the hot rolling intermediate slab. The continuous-casting slab head and tail, is cut into a shape such that an end surface of the head concaves inwards and the tail projects outwards. The head and tail of a slab is cut in a curve that is symmetric to the center line in width thereof. Arc height, i.e. a maximum value of the concave amount at the head or that of the projection amount at the tail is controlled within 0 mm-50 mm.

Abstract: A dough cutting apparatus is suitable for cutting a sheet of dough. The dough cutting apparatus includes a structure defining a blunt dough engaging portion. The present invention can be embodied in a number of different ways, including a wheel cutter, a rotary drum cutter, a reciprocating head cutter, or another cutter.

Abstract: A ladder-like shooting/catching section for a lacrosse stick pocket defined by at least two elongate runners (flat strips) extending from proximate the scoop of the head toward the throat, and a plurality of generally V-shaped chevrons straddling the runners and overmolded thereto. Alternately, the chevrons and runners are formed from a single material. The chevrons have a three-dimensional profile and each is slightly concave along its length, such that the chevrons collectively define a passing/catching chute. The chute increases surface contact with the ball and improves feel. This in combination with the shock-absorbing living hinge function provided by the chevrons makes throwing and catching smoother as well as more consistent, generally improving playability of the lacrosse stick.

Abstract: In a vehicle laminated glass, in which an interlayer film is sandwiched between two glass plates having at peripheral portions ground portions, when peripheries of the two glass plates overlap with each other, an edge surface of the interlayer film is made to be inside the ground portions of the two glass plates, and, when the periphery of one glass plate of the two glass plates is inside the periphery of the other glass plate, the edge surface of the interlayer film is made to be inside the ground portion of one glass plate which is inside the two glass plates. When this laminated glass is attached to a vehicle body, even in case that a peripheral portion of the laminated glass is not covered with a molding, there occurs no diffused reflection of a light incident on this peripheral portion.

Abstract: Coins, medals or casino tokens have a first side, a second side, at least one first layer made of a first material and at least one second layer made of a second material, wherein the first layer is between 10 ?m and 90 ?m, preferably 20 ?m thick. A method produces the coin wherein the coin is produced, more particularly punched, from a clad sheet-shaped composite material. A further method produces the coin wherein the coin is formed from a ring and a core arranged inside the ring. The core and the ring are punched from a clad sheet-shaped composite material and subsequently the core is inserted rotated into the ring and is fixed therein.

Abstract: A tool for cutting a tie wrap bound about a wire bundle. The tool includes a body portion having a generally disc-shaped cutter and cutting edge. A shield covers one side of the cutter and defines first and second shield slots in communication with the cutting edge. A housing pivotally connected to the body portion covers the other side of the cutter and defines first and second housing slots that communicate with the cutting edge. The housing pivots between first, second, and third positions. In the first position, the first housing slot communicates with the first shield slot to expose the cutting edge for cutting purposes. In the second position, the first housing slot is out of communication with the first shield slot, thereby covering the cutting edge. And, in the third position, the second housing slot communicates with the second shield slot to expose the cutting edge.

Abstract: A device for trimming an osteochondral plug graft to an implantable configuration, includes a blade assembly terminating in a configured leading cutting blade and a plug graft housing comprising a substantially longitudinal holding sleeve having a bore and oriented complementarily to the longitudinal structure of the blade assembly to receive the longitudinal structure within the sleeve bore with the assembly cutting blade in close tolerance along an inner bore surface of the longitudinal housing structure.

Abstract: A sheet lifting device is provided for lifting a sheet or web of material in a press. The device can include a base portion and a resilient, bendable arm extending from the base portion. The base portion can include a merge portion that connects the resilient, bendable arm to the rest of the base portion. A system is provided that includes the sheet lifting device mounted in a slot of a support frame, for example, in a blanking press. Methods of conveying a sheet or web of material using the system are also provided.

Abstract: A component for peeling the coating and breaking the optical fiber, which comprises the first member made of resin material including a groove portion enabling to receive a coated optical fiber, an optical fiber cutting blade and a coat removing blade integrally formed within the groove portion, and a breaking portion in an intermediate portion, and the second member made of resin material including a groove portion corresponding to the groove portion in the first member enabling to receive a coated optical fiber, a coat removing blade corresponding to the coat removing blade in the first member, and a breaking portion in an intermediate portion corresponding to the breaking portion in the first member.

Abstract: In order to improve the color and luminance uniformity of an LED chip with a phosphor-containing resin sheet obtained by adhering the phosphor-containing resin sheet to the LED chip, improve the ease of production, and improve the degree of freedom in design, etc., provided is a resin sheet laminate provided with a phosphor-containing resin sheet on a base material, wherein the phosphor-containing resin sheet is divided into a plurality of sections.

Abstract: A food peeling device includes a housing for gripping by a user having an opening shaped and sized to receive a food item, such as the base end of a banana. At least one cutting member is contained within the housing, and has an edge for piercing the base end of the banana. The housing can have a frusto-conical shape.

Abstract: The present invention pertains to a stepladder. The stepladder includes a ladder top having a plane having a front side and a rear side and a left side and a right side and a front side flange and a rear side flange and a left side flange and a right side flange. The stepladder includes a conduit holder slot for holding tubing, pipe and conduit. The conduit holder slot extends along the entire length of the top and in the right side and the left side. The conduit holder slot has a cross-section in the ladder top which is non-symmetrical. The stepladder includes a front section. The stepladder includes a rear section. A method for cutting a tube.

Abstract: Woodworking machines including conductive cutters adapted to cut workpieces, and motors adapted to drive the cutters are disclosed. The machines also include a contact detection system adapted to detect contact between a person and the cutter, and to distinguish contact between the person and the cutter from contact between the workpiece and the cutter. The machines further include a reaction system adapted to cause a predetermined action to take place upon detection of contact between the person and the cutter by the contact detection system.

Abstract: A groundable pipe cutter having an electrically conductive blade and a grounding terminal for attachment to an electrical ground to prevent accidental sparking when cutting a pipe.

Abstract: A process for producing a substrate, which comprises processing an aluminum/graphite composite into plates having a thickness of 0.5-3 mm using a multi-wire saw under the following conditions (1) to (4): (1) the wires have abrasive grains bonded thereto which are one or more substances selected from diamond, C—BN, silicon carbide, and alumina and have an average particle diameter of 10-100 ?m; (2) the wires have a diameter of 0.1-0.3 mm; (3) the wires are run at a rate of 100-700 m/min; and (4) the composite is cut at a rate of 0.1-2 mm/min. The aluminum/graphite composite has a surface roughness (Ra) of 0.1-3 ?m, a thermal conductivity at 25° C. of 150-300 W/mK, a ratio of the maximum to the minimum value of thermal conductivity in three perpendicular directions of 1-1.3, a coefficient of thermal expansion at 25-150° C. of 4×106 to 7.5×10?6/K, a ratio of the maximum to the minimum value of coefficient of thermal expansion in three perpendicular directions of 1-1.

Abstract: The present disclosure is directed, in part, to a method of cutting or shearing tow fibers, bundles thereof, and/or other materials or bundles thereof. The method comprises rotating a drum comprising a cutting assembly comprising a cutting device about a longitudinal axis of a drive shaft, reciprocally moving a portion of the cutting assembly comprising the cutting device in a direction parallel to or transverse to the longitudinal axis as the cutting assembly is rotated about the longitudinal axis, rotating the cutting device at least 1,000 times per minute), and cutting or shearing the tow fibers, bundles thereof, and/or other materials or bundles thereof with the cutting device.

Abstract: This invention provides a slitter assembly with automated adjustment of slitter elements that allows for driven rotation of elements on the associated drive shaft during operation while enabling the elements to be moved freely along the drive shaft during setup and subsequently secured to the shaft free of lateral movement. This ensures that adjustment of the slitter elements is accurate, repeatable and reliable. In an illustrative embodiment, the slitter elements each comprise a pair of coaxial members including a blade member and a locking member. The blade member contains a slitter blade and overlies the locking member which is nested therewith. The locking member directly engages the drive shaft surface with a wedge assembly structure. The members are spring-loaded with respect to each other so that the two surfaces are normally biased to cam together and exert a hoop stress on the drive shaft.

Abstract: An apparatus and method for cutting retainers on a continuous strand is provided. The apparatus may include a rotary head member configured to be rotatably driven about a longitudinal axis. The rotary head member may include a center hole substantially coincident with the longitudinal axis and configured to receive the strand. A retainer forming member may be supported on the rotary head member and may include a cutting edge directed substantially inward toward the longitudinal axis. When the rotary head member rotates about the longitudinal axis and the strand is continuously pulled through the center hole along the longitudinal axis, the cutting edge may intermittently or continuously cuts retainers about an outer surface of the strand.

Abstract: A method for manufacturing a laminated iron core by press punching a thin strip material to manufacture a motor core, comprising, before punching out a scrap 10 of an iron core piece 11 for the motor core, forming a plurality of partition holes 15 in the scrap 10 to divide the scrap 10 into areas 20, each of the partition holes 15 being connected at one end thereof with a peripheral portion 14 of the scrap 10 through a first connecting portion 17. The method further comprises forming a central hole 12, which is connected with the partition holes 15 through second connecting portions 18, at a central portion of the scrap 10. Accordingly, provided are the method for manufacturing a laminated iron core without causing scrap pulling when punching out and laminating the thin iron core pieces 11 and the shape of the scraps formed thereby.

Abstract: A shaving apparatus comprising: a canopy with a nose guard and chin guard; at least one cutting mechanism disposed on a track within the canopy, wherein the track is configured to define the outline of a beard style; and a motor for (a) operating the cutting mechanism(s) and (b) shifting the position of the cutting mechanism(s) around the track. The apparatus may be positioned utilizing the canopy's features. Nose and chin guards may be spring mounted and adjustable to allow for various hair patterns and shapes. The cutting mechanisms may be spring mounted rotary blades that are pressed against the user's face.

Abstract: A wire processing machine having a cutting system, including a knife holder which carries a knife cooperating during a cut with a stationary counter-blade tool and is connected for performing a reciprocating motion by connection to an eccentric pin or a cam disk of a crankshaft driven by an electric motor, the knife holder sliding in a guide during its reciprocating movement, the guide arranged in a stationary manner or pivoting freely about an axis parallel to the rotational axis of the crankshaft in the case of a rigid connection, the crankshaft being driven directly by an asynchronous motor to which a gyrating mass is connected whose kinetic energy is released as a cutting force upon impingement of the knife on the wire, with the asynchronous motor performing precisely one rotation per cutting cycle and being accelerated up to the start of the cut and braked after the cut.

Abstract: A steel-structure demolition method for demolishing a steel structure by causing the steel structure to collapse, the steel-structure demolition method includes: demolishing the steel structure in such a fashion that the steel structure is cut along a cutting line extending in a direction perpendicular to a depth direction thereof when having collapsed.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for producing a foil slitting cut in a foil of a foiled metal sheet. A foil slitting tool is moved along a predetermined path with a tool tip resting on the metal sheet and thereby mechanically produces the foil slitting cut by displacing foil material along the path. The foil slitting cut has at least one acute-angled tooth for forming at least one foil corner detached from the metal sheet.

Abstract: In a method of slicing products, in particular food products, a plurality of products are supplied next to one another along a product support to a cutting plane in which a cutting blade moves, in particular in a rotating and/or revolving manner. The products are initially offset relative to one another in a stepped manner in the product supply direction via the product conveyors in that, starting from a first product, the further products up to the respective outermost product, which are arranged next to one another at at least one side, are set back by a respective amount against the product supply direction, and indeed further than the respective preceding product. The products offset in a stepped manner with respect to one another are traveled to light barriers at a defined speed. The positions of the product starts are detected with respect to the cutting plane via the light barriers.

Abstract: A method, system and corresponding apparatus are provided for determining a perforation location on a blister card comprising at least one unit dose blister of medication. In particular, a data extraction operation with respect to a surface of the blister card may be performed and perforation location information defining a location of at least one perforation adjoining two unit dose blisters on the blister card may be determined based on the data extracted.

Abstract: A cutting unit for a hair cutting device, comprising a stationary cutting member, wherein the stationary cutting member comprises a plurality of stationary blade pieces, and a moving cutting member (10), wherein multiple cutting elements (11) are extending along a middle axis (A) from a base sheet (12) of the moving cutting member (10), wherein each cutting element (11) of the moving cutting member (10) comprises a proximal end (14) with a first width (W1) connected to the base sheet (12) and a distal end (16) with a second width (W2) facing away from the base sheet (12), a first flank (18) and a second flank (20) each extending from the proximal end (14) to the distal end (16), wherein the first flank (18) and/or the second flank (20) each comprising a blade edge (22) extending at least partially along the first flank (18) and/or the second flank (20), wherein the second width (W2) of the distal end (16) is larger than the first width (W1) of the proximal end (14).

Abstract: A pill splitter includes a base, a cover pivotably secured to the base, a cutting blade attached to the cover, and a pill holder arrangement. The pill holder arrangement includes a slideable fixture constructed and arranged to be movable relative to the base and hold the pill. The pill holder arrangement allows a pill to split when the cover is moved in a closed position.

Abstract: A coin-roll opener, e.g. a sleeve or the like for opening a roll of coins, and a method of using the same is described. The coin-roll opener comprises first and second sides with a transverse connector between them. Angles formed by joining the first and second sides of the coin-roll opener to the transverse connector form acute angles, or cutting edges of the transverse connector, abutting the transverse connector. The coin-roll opener is used by fitting it over at least one divider of a cash till or coin tray of a cash register. The coin-roll opener is used by striking a roll of coins against one of the acute angles, or cutting edges of the coin-roll opener, freeing the coins so that they can be deposited within the cash till or coin tray.

Abstract: A blade assembly is provided for use in a wire stripping system, where the blade assembly includes a first blade including a first cutting opening therein, the first opening including a first guide surface on one side of the first opening and a first cutting surface on the opposite side of the first opening, and a second blade including a second cutting opening therein, the second opening including a second guide surface on one side of the second opening and a second cutting surface on the opposite side of the second opening. The blades impart a rotation force on the wire to cause the cutting surfaces to make a depth-controlled circumferential cut in the sheath around the entire wire.

Abstract: An elastic averaging alignment system includes a first component comprising a surface, a thickness and a plurality of elastically deformable apertures spaced apart on the surface and extending through the thickness, each of the elastically deformable apertures comprising an aperture peripheral shape and having at least one slit extending radially-outwardly therefrom defining at least one elastically deformable wedge member. A method of making a component alignment system includes providing a first component having a surface and a thickness. The method also includes forming a plurality of alignment features through the thickness of the first component, the alignment features comprising a plurality of elastically deformable apertures spaced-apart on the surface and extending through the thickness, each of the elastically deformable apertures comprising an aperture peripheral shape and having at least one slit extending radially-outwardly therefrom defining at least one elastically deformable wedge member.

Abstract: A cutting insert comprises an upper surface sequentially including a first and second rake surface. The first rake surface is inclined toward the lower surface, going inward from the cutting edge at a first rake angle on a basis of a perpendicular plane perpendicular to a central axis extending between the upper surface and a lower surface. The second rake surface, located more inward than the first rake surface, is inclined toward the lower surface at a second rake angle different from the first rake angle on the basis of the perpendicular plane. An intersecting part of the first rake surface and the second rake surface includes a protruded part located at a highest position in a region of the intersecting part along the second side surface. A cutting tool with the cutting insert, and a method of producing a machined product using the cutting tool are provided.

Abstract: A power operated rotary knife having a reusable handle assembly and disposable blade support assembly including a head portion and a blade support portion extending from the head portion, wherein upon completion of a tissue debriding operation on a donor, the used blade support assembly is removed from the handle assembly and disposed of, the handle assembly is autoclaved/sterilized and a new, sterilized blade support assembly is affixed to the handle assembly prior to a subsequent use. The knife includes an attachment assembly to releasably attach the disposable blade support assembly to the handle assembly and a retainer structure positioned in an annular groove formed in a bottom surface of the blade housing portion, the retainer structure bearing against an annular rotary knife blade and the blade housing portion to permanently retain an annular body section of the blade in the annular groove.

Abstract: What is disclosed is a circular core for a rotary or circular saw typically used in rescue type operations for cutting openings in building material and featuring alternating pockets on the circumference of the core for the placement of drive links of a chain having cutting segments such that the pockets alternate between pockets on each side of the circular core.

Abstract: The invention relates to a hair-trimming guide that includes a cutting guard that comprises an arcuate sheet of material that defines the region of hair to be cut when it is positioned on the head of a person in need of a haircut. The hair-trimming guide is easy-to-use, durable, and customizable. The invention also provides a method for trimming hair using this hair-trimming guide.

Abstract: A dry shaver unit includes a housing and a cutter blade assembly mounted in the housing. The cutter blade assembly includes a cutter blade and cooperating shear blade arrangement. The thickness of the shear blade varies over its surface, such that the spacing between a portion of the skin engaging surface of the shear blade and the opposite face thereof is increased as compared with the spacing required to achieve a “close shave”. The cutter blade assembly is mounted in the housing such that a plurality of portions of the shear blade having different thicknesses are simultaneously available for application to a surface to be shaved.

Abstract: The wafer stack (100) comprises a first wafer (OW1) referred to as optics wafer and a second wafer (SW) referred to as spacer wafer, said optics wafer (OW1) having manufacturing irregularities. The spacer wafer (SW) is structured such that it at least partially compensates for said manufacturing irregularities. The corresponding method for manufacturing a device, which in particular can be an optical device, comprises carrying out a correction step for at least partially compensating for manufacturing irregularities. Such a correction step comprises providing a wafer (SW) referred to as spacer wafer, wherein that spacer wafer is structured for at least partially compensating for said manufacturing irregularities. Those manufacturing irregularities may comprise a deviation from a nominal value, e.g., a irregularities in focal length. The invention can allow to mass produce high-precision devices at a high yield.

Abstract: A method for producing a cable-sealing member is disclosed. The method comprises forming a formed rubber including a first plane and a second plane that oppose in a thickness direction and a side plane that bridges a peripheral edge of the first plane and a peripheral edge of the second plane. The method further includes rotating the formed rubber with one axis in the thickness direction as a rotary axis while a holder is applied over the side plane of the formed rubber and, meanwhile, inserting a cutting blade from the first plane into the formed rubber to form a ring-form slit portion and stopping the cutting blade just in front of the second plane, leaving a slit-form ring unbored on one side.

Abstract: Methods and apparatus suitable for cutting food product. The apparatus includes an annular-shaped cutting head and an impeller coaxially mounted within the cutting head for rotation about an axis of the cutting head in a rotational direction relative to the cutting head. The cutting head has lower and upper structural members, circumferentially-spaced support segments between the lower and upper structural members, and at least one knife assembly located at a perimeter of the cutting head adjacent a corresponding one of the support segments. The knife assembly includes a holder having a slot, a knife partially received within the slot, and tensioning means for inducing a longitudinal tension in the knife.