Abstract: A trowel handle is injection molded from two separate types of plastic. An inner core is molded together with a finger guard from a plastic providing a smooth surface of a first coefficient of friction with the user's hand. The finger guard covers the metal tang of the trowel and protects the user's forefinger and thumb during troweling. An outergrip is molded from a thermoplastic rubber providing a soft, rubber-like surface of a second coefficient of friction with the user's hand.

Abstract: A wiping and spraying apparatus is provided for wiping away dirty articles such as dead insects caked on the surface of a windshield of an automobile. The apparatus includes a wiper blade with adjustable depression force as well as first and second reservoirs of cleaning fluid. A valve is fluidly connected with the reservoirs to selectively allow either of the fluids to be sprayed onto the windshield. The apparatus further includes a control unit to operate the apparatus by automatically operating spraying and wiping, including adjustment of the depression force, according to two modes of operation.

Abstract: A windshield cleaning system with a wiper shaft for driving a wiper arm-and-blade assembly is described, which windshield cleaning system comprises an axial bore for forming a washing liquid channel, whereby at least one electric conductor for heating the washing liquid is assigned to the washing liquid channel. Thereby the electric conductor is anchored on a pipe, which is arranged in the bore of the wiper shaft, whereby this pipe extends the end of the wiper shaft by way of at least one end portion and can detachably be connected there with a counter contact piece. Due to the plug connection of the electric conductor an easy assembly is possible.

Abstract: A wiper blade assembly has an elongate carrier strip for supporting on a windshield wiper arm, a pair of spaced, flexible wiper blades depending parallel to one another from the carrier strip with a gap between the blades, and a cleaning member supported in the gap between the blades, the cleaning member having a base portion and a plurality of conical cleaning tips depending from the base portion. The cleaning tips are shorter than the wiper blades so that they do not contact a windshield surface until the wiper blades are deformed in a wiping action, and are more rigid than the blades.

Abstract: The present invention relates to a cabinet hinge (10) for hanging a door on a cabinet whose front opening is narrowed by a frame reaching inward at right angles from the side walls, which is at least partially overlapped by the inside of the closed door. The hinge (10) has an arm (28) of sheet metal which has a mounting plate (32) which can be placed on the free edge (16) of a stile (14) of the frame and releasably fastened thereon, whose width corresponds essentially to the width of the edge (16) of the stile (14), and which bears the arm (28) coupled by a link mechanism to the hinge member (22) attached to the door. On the front and back margins of the mounting plate (32) there is created at least one tab (36; 38) bent substantially at right angles against the outer and inner faces of the stile (14). The inner tab or tabs (38) are provided with a pointed or knife-edged projection (40) extending toward the inner face of the stile (14).

Abstract: An electrostatic opening and short fiber separation apparatus for carding machines making use of a high voltage electrostatic field; which produces different forces on filaments, short fibers, and dust; in cooperation with a plurality of suction devices to separate short fiber. The apparatus is to be installed in front of a card cylinder where a doffer and a sliver forming mechanism have been removed. By means of a specially designed stripping roller, fibers are stripped from the cylinder and float across the electric field due to the attraction of suction devices. Cotton fibers in the electric field will be affected by the high voltage and held by upper and lower circular metal screen conveyor belts, to move forward. Short fibers and dust move to and fro between two metal strips due to the existence of the electric field; they will be taken up and removed if the drag force of suction devices is larger than the action force of the electric field.

Abstract: This invention relates to a hose clamp constituted by a band of material, generally metal, wound on itself, one of the ends of said band presenting relief elements forming a rack, whilst on the other end is fixed a housing which constitutes the support of a screw which is mounted to pivot about its axis, said screw abutting on a stop axially mobile with respect to the housing against the action of a spring. The spring is constituted by a curved blade, for example in the form of a semi-circle, whose concavity faces the inside of the clamp and whose ends are laterally in contact with the sides of the housing. A first end of said blade is axially fixed to the housing and provided with an opening in which the tail of the screw may slide, whilst the second end of the blade surrounds at least partially the shank of the screw in the vicinity of its head and is mounted to slide with respect to the sides of the housing.

Abstract: A fastener constructed of a receptacle enclosure shell (10), a frame structure (30) containing flexible beams (34, 35), and a plunger insert (50), is disclosed. The flexible beams (34, 35) contain transverse fins (36, 37) for releasably engaging internal salient ridges (16, 17) extending from within transverse walls (25, 26) of a main cavity (21) defined within receptacle enclosure shell (10) . The receptacle enclosure shell (10), also includes a notched end wall (14) for slidably retaining plunger insert (50). plunger insert (50) has forked fingers (52, 53) that are internally constrained within main cavity (21) of receptacle enclosure shell (10), and are directed towards transverse fins (36, 37) of flexible beams (34, 35), heretofore inserted into receptacle enclosure shell (10). plunger insert (50) also contains a slidable shaft (54) Which extends out through notched end wall (14) of receptacle enclosure shell (10), and at its outermost extremity, projects a boss (56).

Abstract: A fastening means to secure a gaiter to a roller skate or the like is composed of at least a buckle integral to the back of the skater and a fasten belt on the gaiter adopted to be detachably secured to the buckle in a manner that the position of the fasten belt with respect to the roller skate is adjustable. The fastening means will also proect sportsman from twisted their ankle in exercise.

Abstract: A reinforcing matrix is produced using a plurality of regulating members (pins) removably arranged in rows in a predetermined direction on a base. Yarns are woven between the pins on the base repeatedly looping back and forth between spaced apart positions to form a yarn lamination consisting of a plurality of yarn layers over the base. The yarns forming the yarn layers are arranged in at least two directions. Thereafter the yarn lamination is removed from the base together with the pins. Then the pins are replaced sequentially in rows arranged in the predetermined direction with separate vertical yarns which are inserted into the yarn lamination so as to form loops. A selvage thread is inserted in the predetermined direction through the loops of the vertical yarns.

Abstract: Moresque or berber continuous filament yarn is prepared by supplying a first group of continuous filaments to a first entangling zone where harsh nodes are created so that the first group has a yarn harshness of at least about 200. One or more other groups of continuous filaments, which are differentially precolored or dyeable with respect to the first group, are joined to the first group and interlaced sufficiently to cohere all groups of continuous filaments without blending with the tightly interlaced first group. The finished yarn has node harshness less than 100.

Abstract: A method and apparatus for substantially automatically joining front and back parts of buttons employs a turntable with retaining means that are rotated through a series of stations at which the parts are placed in the retaining means in a desired orientation, joined, and checked for defects. A human operator places button front parts at a first station, and the remaining stations carry out the assembly and quality control steps automatically. Placement at the first station determines the alignment and orientation of the two buttons.

Abstract: A method for forming a thin film on a semiconductor substrate wherein the substrate is transferred between an auxiliary chamber having an inert atmosphere to a reaction chamber having a reactive atmosphere, and wherein the inert and the reactive atmospheres exist concurrently during transfer.

Abstract: An instrument for forming nanometric features on surfaces of materials having a motor driven support for moving a workpiece on an X-Y-Z axis, a scribing tool of nanometric proportion engagable with the workpiece and a laser system for sensing movement. The tool is mounted on piezoelectric actuating means and the entire system is under the control of a programmed computer processing unit.

Abstract: A reflector arrangement for an acoustic wave device comprises an acoustic wave propagating substrate, reflection elements having at least two different widths separated by at least one gap breadth disposed on the acoustic wave propagating substrate. The at least two different widths enhance reflected waves produced by the propagating acoustic wave in such a fashion as to achieve a total acoustic reflectivity which is independent of variations in width of the reflection elements.

Abstract: A method of manufacturing a print head for an ink-jet printer comprises steps of: forming a main plate (1) by superposing a first piezoelectric plate (2), a first low-rigidity plate (5), a second low-rigidity plate (6) and a second piezoelectric plate (3) in that order in a laminated structure; cutting a plurality of parallel first and second grooves (7, 9) through the first piezoelectric plate into the first low-rigidity plate and through the second piezoelectric plate into the second low-rigidity plate, respectively, by grinding to form first and second walls (8, 10); forming first and second electrodes (14, 15) respectively over the side surfaces of the first and second walls (8, 10); attaching a top plate (17) and a bottom plate (18) respectively to the outer surfaces of the first and second piezoelectric plates (2, 3) to form first and second pressure chambers (22, 23) respectively in the opposite sides of the main plate (1); and attaching an orifice plate (20) provided with a plurality of ink jets ( 19)

Abstract: A wire guide member is formed with a U-shaped curved guide surface along which a recessed wire guide groove is formed. A wire supplying device is disposed an appropriate distance away from one end of the wire guide groove, and a wire end stopper is disposed another appropriate distance away from the other end of the wire guide groove, respectively. Two wire push-in plates are interposed between the wire guide member and the wire supplying device and between the wire guide member and the wire end stopper, respectively so as to be movable up and down. Further, a wire holding member for clipping the bent wire is arranged at a position lower than the wire travel line determined by the wire supplying device and the wire guide groove, so as to be movable in a direction perpendicular to the wire feed direction.

Abstract: Seat covers are sewn inside-out and then inverted to fit over a frame. Inversion is accomplished by threading the sewn seat cover over a pair of generally parallel arms. The sewn seat cover is generally in the form of a pocket. The closed end of the pocket is engaged by the blunt edge of a plate. The plate pushes the closed end between the arms forcing the structure of the pocket to ride up and over the top of the arms and downward between the two arms thereby inverting the seat cover to a right side out condition.

Abstract: The detached cylinder head is placed on a table or other flat surface which has a recessed area within which is retained a deformable elastic bladder. Air, water or some other fluid is introduced into the bladder causing it to expand so that it conforms to the chambers within the cylinder head. The pressure of the expanded bladder within the chamber forces the valve upward against the valve seat. Once the valve is pressed upward against the valve seat, the valve can be disassembled by depressing the spring and removing the fastener, so that the spring can be removed, or the spring can be put in place and the valve reconnected.

Abstract: A plurality of roll pin punches in association with an elongate handle are mounted for ease of assembly within a container structure. A cap member having an internally threaded bore and including a forward wall bore coaxially aligned through the forward wall and the threaded bore includes a resilient "O" ring mounted within a toroidal groove and interfaced between the threaded bore and the forward wall bore to secure the punch member.

Abstract: A conversion kit allows a user to convert a conventional deadbolt lock mechanism into a pick proof deadbolt lock mechanism by providing all the necessary parts allowing a user to easily and effectively prevent the turnpiece latch of the deadbolt lock mechanism from rotating. Once installed, a locking shaft pin of the kit can be placed into a first orifice drilled through the turnpiece latch and a second orifice, coaxially aligned with the first orifice, drilled through the backplate to immobilize the turnpiece latch in its locked position. It would also allow a deadbolt manufacturer to use the same, in which case the collars could be a rivet style.

Abstract: A method for restoring worn or damaged sun visors for a vehicle to a like-new appearance typical of original sun visors. Any deteriorated upholstery and padding material that covers the core/frame of an original sun visor may be removed and discarded. A new cover is fabricated with an appropriate size to slip over the old visor. The cover is made by sewing together front and rear panels along about 50 percent of their juxtaposed edges. Each panel is shaped like the original core, and has a structural base made of a thin sheet of chipboard or the like; each panel is sufficiently stiff as to be self-supporting. Each panel is cosmetically completed by providing it with an outer covering of finished upholstery material or the like. The slip cover may be placed about a visor core, or about an entire visor, to provide a new outer surface.

Abstract: Process for improving the elasticity of a ski edge made of corrosion-resistant martensitic chrome steel, consisting of pre-stretching the edge, and for the manufacture of a ski incorporating edges so produced.

Abstract: A method of making a flower pot or flower pot cover comprising a base and a skirt connected to an upper end of the base. The base includes a plurality of overlapping folds for providing structural integrity. The skirt includes a plurality of folds which are not connected to provide an overall pleated appearance. Portions of the folds in the skirt are connected and portions of the folds in the skirt are unconnected. In one embodiment, some of the folds in the base are connected and the remaining portions of the folds in the base are unconnected.

Abstract: A reversible impact-operated boring tool and a method for reversing the direction of operation of the same rapidly and safely is disclosed. The tool according to the invention possesses a second supply line for supplying pressurized fluid to the tool. The second supply line provides pressurized fluid to a directional valve within the tool. The tool operates in the forward mode for burrowing into the soil when pressurized fluid is supplied to this directional valve. When the pressurized fluid supply is terminated and the fluid is exhausted from the valve, the tool operates in the reverse mode. The tool according to the invention can be reversed safely without any need for hose manipulation and without turning off the primary fluid supply line.

Abstract: A process for repairing the winding of an electrical linear drive having three winding strands formed of electrical cables which meander in the grooves of an inductor belonging to an elongated stator. To correct a defect in one of the winding strands, the respective cable is first removed from the grooves of the inductor in the defective area. Then, a section of predetermined length of the cable containing the defect is cut from the winding strand. The removed section of the cable is then replaced by a length of prefabricated cable of suitable length and shape, and the repaired cable is then reattached to the grooves of the inductor.

Abstract: A method of constructing a ferrite magnetic head that can be used for vertical recording. The head is created by first bonding a non-magnetic shoe to the legs of a C-Shaped magnetic core to create a block assembly. A pole surface of the block is then lapped and sputtered with a magnetic pole material. A layer of alumina is then sputtered onto the magnetic pole material. After sputtering, the block is ground to create air bearing grooves and a plurality of poles. The bearing surface of the block is then lapped to the apex of an oblique interface between the shoe and core to create the throat of the pole. The block is cut into individual transducer cores which are then wrapped with a wire coil and attached to a flexbeam.

Abstract: An automatic rivet feed apparatus which can be used as a retrofit to an existing power driven riveting tool or incorporated integrally into a riveting tool. A rivet strip holds each of the plurality of rivets at individual fixed positions on the rivet strip. Included is a rivet strip release hook which stops the rivets, as they are advanced one-by-one, at rivet pick-up point and releases each of the rivets from the rivet strip. A hand mounted on the end of a pneumatic ram grips the rivets at the rivet pick-up point. The pneumatic ram moves the rivet forward and rotates to place the rivet in alignment with the nose piece of the riveting tool. The pneumatic ram then retracts and inserts the mandrel of the rivet into the nose piece and returns to the rivet pick-up point to repeat the steps.

Abstract: A press for assembling an electrical connector (C) having tines (T) projecting therefrom, to a printed circuit board (PCB), comprises a press ram (40) which is pivotally mounted to the top of the forward end of a press frame (16). A ram (40) has, at its forward end, a connector holder (54) for receiving a connector (C) with the tines (T) of the connector (C) projecting from the holder (54). A ram (40) has a raised, connector loading position, in which the connector holder (54) projects obliquely downwardly towards the operator so that the operator can easily load the connector (C), which may be of microminiature size, into the holder (54). The ram (40) has a drive unit (36) for driving it from its loading position into a vertical position, in which the holder (54) projects towards a printed circuit board (PCB) on a support structure (14).

Abstract: A high density connector for electrically connecting a high density cable to a matable electrical connector has a housing with a plurality of terminals provided therein. The terminals have sharp outer edges which enable the terminals to cooperate with a portion of the connector to provide the securing force required to retain the terminals in position. The positioning of the terminals in the housing is accurately controlled through the use of an alignment tool which is manufactured from a material which does not expand or contract when exposed to various environmental conditions. Therefore, the precise positioning of the terminals is guaranteed and is repeatable for many connectors.

Abstract: An assembly, and associated method for constructing such, for connecting an electrical circuit to an electrical cable, such as an antenna connector pin, or, alternately, to a coaxial transmission line. An antenna circuit board includes a circular aperture extending therethrough for receiving a socket member to be supported thereat. Angled, segmental-slots are formed about the circular aperture and receive projecting prong-members of a clip member. The socket member receives the electrical cable, such as the antenna connector pin, or a coaxial conductor pin therein. The clip member engages with a coaxial tube of the coaxial transmission line. The assembly permits alternate connection thereto of either the electrical cable or the coaxial transmission line thereat.

Abstract: The present invention provides a wiring method and apparatus to wire two wiring board assemblies, each of which comprises: an insulating substrate; and a plurality of pressure terminals or busbars secured to the substrate, each having a press-connection portion formed with a slot. Wire connection is made by pressing the wires into the slots of the pressure terminals. The process of wiring is as follows.

Abstract: A harness making apparatus comprises a length measurement section to measure the length of a plurality of wires fed from a wire feeder and an insulation displacing section for insulation displacing the wires to a connector fed from a connector feeder. Additionally, the harness making apparatus is provided with a fusing section disposed adjacent to the insulation displacing section for fusing and intercoupling a plurality of wires in such a manner that adjacent wires substantially abut against one another.

Abstract: Tee-nut support assembly to supply Tee-nuts to the driver device of a Tee-nut setting apparatus, and a package of rolled Tee-nuts connected in a strip for such apparatus.

Abstract: The detached cylinder head is placed on a table or other flat surface which has a recessed area within which is retained a deformable elastic bladder. Air, water or some other fluid is introduced into the bladder causing it to expand so that it conforms to the chambers within the cylinder head. The pressure of the expanded bladder within the chamber forces the valve upward against the valve seat. Once the valve is pressed upward against the valve seat, the valve can be disassembled by depressing the spring and removing the fastener, so that the spring can be removed, or the spring can be put in place and the valve reconnected.

Abstract: Setting pitch on a windmill airfoil having a longitudinal axis, a rotor blade and a rotor base secured to the rotor blade is accomplished by marking a windmill rotor hub for receiving the rotor base with a reference mark at a location corresponding to a first plane parallel to a plane of rotation of the windmill airfoil in use. The airfoil is positioned along a second plane relative to and substantially completely intersecting the longitudinal axis of the airfoil. The rotor base is marked at a location substantially parallel to the second plane. The airfoil is positioned relative to the windmill rotor hub so that the rotor base is in substantial engagement with the hub. The airfoil is moved relative to the hub so that the mark on the rotor base is aligned with the reference mark on the windmill rotor hub and the rotor base is secured to the windmill hub. An apparatus for marking pitch on a windmill airfoil is also provided.

Abstract: Described is an electric hair-cutter with a spacer comb (3) fitted on the cutter head and a sliding switch (11) for switching the hair-cutter on and off. The invention calls for the hair-cutter to have a preselector (60) switch which can be set so that the motor is not switched on until the slider switch locks into a predetermined position.

Abstract: A portable circular saw with a dust collector for use in trapping fine dust raised in cutting cultured marble, concrete, masonry and the like has a deflector positioned above a discharge aperture in the front of an upper blade guard for directing the envelope of air moving in the direction of the circular saw blade out the discharge aperture where it is evacuated before it can spread into the workplace environment. The deflector has a slot through which the cutting tip of the circular blade passes.

Abstract: A knife has a handle that slideably receives the respective handles of a fork and a spoon in one orientation only. The transverse cross section of the fork handle and the spoon handle is generally rectangular, with a longitudinally-extending step formed in each side to create a broad base and a slightly narrower upper part. The knife handle has a corresponding channel on each of its opposite sides and slidingly receives the fork handle on one side and the spoon handle on the other if the handles are correctly oriented. The steps formed in the handles of the fork and spoon are of small depth so that they are barely noticeable by users of those utensils.

Abstract: A folding lock knife includes a handle member having a handle cavity arranged to receive a lock blade therewithin, wherein the lock blade includes a first end, the first end including an arcuate array of ratchet teeth arranged for selective cooperation with a lock lever having a lock lever foot received between a plurality of such teeth to selectively secure the blade member in a preselected orientation relative to handle portion of the knife assembly.

Abstract: A new and improved hand-held seam notching apparatus includes two double-armed lever assemblies. A first double-armed lever assembly includes a first handle portion, a first fulcrum portion, and a first jaw portion. The first jaw portion includes a first well portion and a first cutter assembly received in the first well portion. The first jaw portion also includes a first connector for connecting the first cutter assembly to the first well portion. A second double-armed lever assembly includes a second handle portion, a second fulcrum portion, and a second jaw portion. The second jaw portion includes a second well portion and a second cutter assembly received in the second well portion. The second jaw portion also includes a second connector for connecting the second cutter assembly to the second well portion.

Abstract: A magnetic-electronic linear measurement gage for measuring workpiece miter lengths for picture and window frames and the like includes a gage bed on which a workpiece may be removably mounted, a stop body slidably mounted on the gage bed having a stop which may butt against a workpiece mitered end, and length and width scales and scanning units associated with the gage and the stop body generating output signals in response to the scanning of the scales. The output signals are received and converted by a CPU to generate a linear measure output signal which may be inputted to a digital LED display for visually displaying the linear measure corresponding to the workpiece length so measured.

Abstract: A gun sight for rifles, pistols, or shotguns which is particularly useful on rapid fire weapons, such as semi-automatic rifles and pistols used by the public, or fully automatic weapons used by the military. The gun sight consists of a rear sight and a front sight. The rear sight consists of a base, two side walls, and a top joined together. The top has a rectangular channel cut into it. The front sight consists of a small threaded rod affixed to a small tube and a base which is attached to the barrel of the gun. The small threaded rod then adjusts upward and downward in a small hole drilled in the top of the base.

Abstract: A method and apparatus for aligning a vehicle having a frame, and a plurality of wheel hubs, and a suspension system operatively connecting the wheel hubs to the frame is provided. The method and apparatus provide sensors for sensing angular relationships between the wheel hubs and the frame in multiple suspension positions, and a computer connected to the sensors for calculating camber, castor and toe based upon the sensed angular relationship and for displaying whether camber, caster and toe are within preset ranges.

Abstract: A device which measures the overall diameter of groups of hairs or fibers and reduces the work required to obtain their statistical parameters. In the preferred embodiment an outer hollow cylinder is mounted between the measuring surfaces of a micrometer. An inner edge of a trough made in the cylinder articulates with an edge of a half cylindrical portion of a piston moving within it by means of a handle; the two parts thereby making a window with diametrically opposed halves. A spring presses the piston edge to the trough edge by sliding the piston on slopes against two parts with short steps and a block disengages one end of the piston to let hair in when open. An elongated step with a railing is placed under the piston half cylinder thus making the window into a face of a hollow triangular prism. The railing rises higher than the edge of the trough so that when the piston and trough edges nearly meet the elongated bottom step must turn and bend the hairs.

Abstract: A magazine has a plurality of storage ports 400 each of which retains a stylus module 314 for use in measuring workpiece dimensions on a coordinate measuring machine. Each storage port 400 is configured as a pair of jaws provided by docking inserts 414. A permanent magnet 418 is mounted on each docking insert 414. The lower casing of the stylus module 314 is urged against the inwardly facing edges 416 of the docking inserts 414 by the magnetic attraction force due the magnets 418. The stylus module 314 is engaged with a retaining module (on the quill of the machine) by moving the retaining module in a downward sense to engage the stylus module 314; further downward movement disengages the stylus module 314 from the storage port 400, thus enabling engagement of such a stylus module and removal of the module from the storage port in a single continuous movement.

Abstract: The registration board assembly for pre-press printing proofs and printing plates includes a substantially planar layer or registration board, a backing layer adjacent and affixed to the planar layer, and a cavity formed between the planar layer and the backing layer. A register pin extends through an aperture in the planar layer. An elastomeric member such as a rubber diaphragm is disposed within the cavity and biases a barrel portion of the register pin through the planar layer aperture. The elastomeric member is mounted so that it is removable and replaceable. One way of mounting the elastomeric member is to provide a hole in the backing layer through which the elastomeric member is pulled to remove it. A new elastomeric member is then pushed through the backing layer hole. In a second embodiment, a threaded plug in the backing layer holds the elastomeric member in place. The threaded plug is removed to replace the elastomeric member.

Abstract: In order to achieve relative simplicity in a reliable measurement technique, an apparatus and method for measuring wet film thickness on a surface is disclosed. The apparatus includes a fixture adapted to be positioned in close proximity to the surface, a gauge supported by the fixture for movement toward and away from the surface, and a spacer for spacing the fixture at a selected distance from the surface. The gauge is moveable from a first position out of contact with the wet film to a second position in contact with the surface to create a measurable spot of the wet film on the gauge. The method includes providing a gauge supported for movement toward and away from the surface, moving the gauge into contact with the surface to create a measurable wet film spot, and moving the gauge out of contact with the wet film to measure the spot.

Abstract: A process for deliquifying a solid particulate containing liquid waste stream including organic contaminants produced during the production of acrylonitrile comprising feeding the waste stream onto the outer surface of a heated drum(s) rotating the drum(s) to facilitate removal of the liquid to produce a substantially solid material which adheres to the surface of the drum(s) and is subsequently removed.

Abstract: The present invention is directed generally to a method and apparatus for drying a web of paper utilizing impulse drying techniques to provide a unique paper product having a predetermined pattern of delaminated paper fibers. In the method of the invention for drying a paper web, the paper web is transported through a pair of rolls wherein at least one of the rolls has been heated to an elevated temperature. The heated roll is provided with a planar surface having a predetermined pattern formed on the surface of a material having a low K value of less than about 3000 w.sqroot.s/m.sup.2 c and having a relatively low porosity. The material forming the predetermined pattern of the roll surface is preferably selected from the group consisting of ceramics, polymers, glass, inorganic plastics, composite materials and cermets. The remainder of the roll surface has a high K value of greater than about 3000.