Abstract: A tape guide post mechanism for guiding running of a tape is provided. The tape guide post mechanism includes a post arm, the post arm including a tape guide post, around which the tape is looped, and which guides running of the tape, and a hole. The tape guide post mechanism further includes an arm shaft which engages with the hole and rotatably supports the post arm. The arm shaft has an elastic portion which presses a portion of the post arm. As a result a small sized, inexpensive tape guide post mechanism, which has a simple structure, in which the slant of each element is accurately controlled, and which achieves decreases in size and cost of the magnetic recording/reproducing apparatus, can be obtained.

Abstract: A method and an apparatus for automatically feeding slider-zipper assemblies to a station where the slider-zipper assemblies can be attached to bag material such as thermoplastic film. The apparatus includes a slider guide having a channel running the length thereof. The channel has a cross section that allows passage therethrough of sliders slidably mounted to a tape of connected slider-zipper assemblies. A tape drive mechanism is located at the outlet of the slider guide. The tape drive mechanism includes a pair of rollers that form a nip therebetween. The zipper flanges of the tape are threaded through the nip. The rollers have respective grooves that form a space for passage of the sliders as the tape is advanced by the rollers.

Abstract: A roller including an inner tubing and an outer tubing which is fixed relative to the inner tubing by welding the outer tubing to the inner tubing. The roller with weldments is particularly suitably for a nipped application.

Abstract: The present invention includes an interchangeable coil tubing support block that provides a means for quickly adapting a wheel system for wheel-type coiled tubing injectors for a wide variety of tubing sizes. In addition, the present invention provides a light weight, robust, and wear resistant means of contacting and fully supporting the tubing while it is being injected into and withdrawn from a well.

Abstract: A tape roller bearing is provided that prevents the development of an air film between the roller surface and the tape. The spool surface is made from porous material so that air flows through the spool surface. The porous material vents air uniformly over the roller surface, and the tape remains in direct contact with the roller, even at high speed. The inventive roller has many advantages, including improvement of tape wear characteristics, enhancement of tape guiding abilities, and increased tape speed stability.

Abstract: An improved bowed roll assembly and system that can be adjusted during operation to alter critical speeds to outside the range of the operational speed of the assembly, and methods of altering critical speeds of the roll assembly during its operation to inhibit harmonic vibration are provided. In one embodiment, the bowed roll assembly system includes a programmable logic controller (PLC) and accelerometer, and the critical speeds of the roll assembly are “learned” by the PLC which triggers changes to the pressure of the pressure applying member of the assembly to alter the roll's stiffness and the critical speeds.

Abstract: In a recording and/or reproducing device (1) comprising at least one tape guide (10), the guide wall (13) and the guide flanges (14, 15) projecting beyond the guide wall (13) are coated with a coating (21) of zirconium nitride or titanium nitride, as a result of which a high wear resistance and a high resistance to the deposition of material abraded from the tape is achieved.

Abstract: In a roller shaft (10) comprising a shaft portion (12) of a substantially solid cylindrical shape and a flange portion (14) of a disk-like shape, the shaft portion (12) comprises a hollow cylindrical portion (121) having a substantially hollow cylindrical shape and formed at a lower end (10a) side. The hollow cylindrical portion has an inner peripheral surface with a female screw (12a) formed thereon. As positioning and rotation preventing means for positioning the roller shaft (10) with respect to the chassis (32) and for preventing the roller shaft from rotating around the chassis, a D-shaped cut (122) is provided on an outer peripheral wall of the hollow cylindrical portion at one place thereof. The positioning and rotation preventing means may comprise a D-shaped cut (141) or a slot (142) formed in the flange portion (14) at one place thereof.

Abstract: A wire feeder comprises a feedroll with through slots that open into a bore and that extend between the feedroll ends. The feedroll has blind slots in the ends that also open into the bore. A shaft on the wire feeder has a radial pin. The feedroll is assembled on the shaft by angularly aligning the through slots with the pin and pushing the feedroll onto the shaft against a spring until the feedroll is past the pin. The feedroll is rotated on the shaft until the blind slots align with the pin. Then the feedroll is released to enable the blind slots to engage the pin under the force of the spring. The feedroll may be assembled to the shaft either in a manner that takes up any end play of the shaft, or that enables the feedroll and shaft to float through the end play.

Abstract: A device for guiding material webs (A through D; E through H) via an angle-bar deck (2), including a folding section that is arranged on a plurality of planes (3.1, 3.2, 3.3), from where the material webs (A through D), (E through H) enter folding apparatuses (4), (5). Accommodated on longitudinal folding devices (8), (9) are infeed elements (7), which have guide sections (13), (14) that are-able to be operated independently of one another.

Abstract: An apparatus (1) for transversal drawing a film (2) in motion, has a pair of rollers (3, 4) rotating on parallel axes and fitted with toothed surface profiles (5, 6) that overlaps without touching each other. The profiles define a wavy passage (7) for the film, and rounded tips of the toothed profiles (5, 6) of the two rollers (3 and 4) define the points of application of the drawing action on the film (2).

Abstract: A capstan shaft cleaning device has a cleaning member removing dirt attached to a capstan shaft and a moving mechanism moving the cleaning member between a position at which the cleaning member contacts the capstan shaft and a position at which the cleaning member is separated from the capstan shaft, the cleaning member having at least two points of contact contacting a periphery of the capstan shaft.

Abstract: A rotary frame pivotably supported on a rack and swiveling around a swivel axis. The frame supports at least one reversing roll for moving the material web. A pivot bearing in the form of an antifriction bearing is cut as a segment so that the material web can run close to the swivel axis.

Abstract: A roll quadrant conveyor for conveying strip material generally includes a plurality of support members for supporting a plurality of rolls around a quadrant roll of any desired wrapping angle and, further, a plurality of rolls journaled for rotation in the support members. The rolls are positioned on opposed sides of a conveyor centerline, with each roll positioned at an angle of less than 90° with the conveyor centerline. The rolls define a chevron pattern around the wrapping angle. The strip material, in motion, is centered on the conveyor by the rolls arranged in the chevron pattern. The rolls are profiled rolls.

Abstract: A wire feeder comprises a feedroll with through slots that open into a bore and that extend between the feedroll ends. The feedroll has blind slots in the ends that also open into the bore. A shaft on the wire feeder has a radial pin. The feedroll is assembled on the shaft by angularly aligning the through slots with the pin and pushing the feedroll onto the shaft against a spring until the feedroll is past the pin. The feedroll is rotated on the shaft until the blind slots align with the pin. Then the feedroll is released to enable the blind slots to engage the pin under the force of the spring. The feedroll may be assembled to the shaft either in a manner that takes up any end play of the shaft, or that enables the feedroll and shaft to float through the end play.

Abstract: A device and method for guiding a transversely stable material web. The device contains at least one roller and one counter roller disposed on opposite sides of the material web. The roller and counter roller can be swiveled synchronously with each other, thereby holding the material web between each other with a clamping grip. This device provides a substantially higher guiding force in relation to the running direction of the web than devices with stationary abutments.

Abstract: A tensioner, for clamping cables, flexible pipes or bars and moving them forwards in a controlled manner, includes at least two conveyors, each intended to displace one or more clamping members. The conveyors each attached to a main frame element. A selective number of the conveyors can be combined using standard connection elements.

Abstract: A transporter for lead frames has two rotatable wheels with mutually facing running surfaces for engaging a lead frame between the wheels. A frame supports the wheels. An actuating cylinder engages on at least one wheel for mutual displacement of the wheels. An assembly of two such transporters is also disclosed.

Abstract: A roll for a tape guide 8 and a method for manufacturing the tape guide roll. The tape guide roll 8 is molded by injecting a molding material into a pre-set cavity 22. The tape guide roll 8 is made up unitarily of an inner cylindrical portion 9, an outer cylindrical portion 10, and plural connecting portions 11, 11, . . . unitarily interconnecting the inner cylindrical portion 9 and the outer cylindrical portion 10. The length of the inner cylindrical portion along the axial direction is longer than the tape width, and the length along the axial length of the outer cylindrical portion is longer than the length along the axial length of the inner cylindrical portion.

Abstract: A transport mechanism for transporting photographic media along a processing path. The mechanism includes a roller assembly having a pair of space support roller assemblies disposed along a common shaft. Each pair of roller assemblies having a support roller having an outer engaging surface. A spring is provided for biasing the contact surface toward the edge of the media and a retaining member for restraining movement of each of the roller assemblies on the shaft.

Abstract: A roller guiding system for delivery of magnetic tape media along a tape path between a tape drive employing a single reel and a tape cartridge employing a single reel. The roller guiding system comprises a plurality of guide rollers configured to adjust the path of travel of the tape media during tape drive operation to maintain tracking of the tape media with a tape head.

Abstract: A yarn delivery apparatus is provided having two delivery rollers of which one of the delivery rollers is resiliently biased against the other delivery roller and one of the two delivery rollers is floatingly mounted such that it is disposed for a selected one of a swivel and a swinging movement relative to the other delivery roller. The yarn delivery apparatus being characterized in that the floatingly mounted delivery roller is configured as a rotationally symmetrical hollow body whose inner wall is supported on a ball-shaped support body which is secured to an axial shaft in a manner such that the position of the floatingly mounted delivery roller can be changed only within a plane defined by the axes of the two delivery rollers.

Abstract: Rotating winch for stranding lines comprising a hollow rotor (1) wherein a motor (9) suitable for rotating a drawing drum (12) around an axis perpendicular to the axis of rotation of the rotor (1) is arranged, the external lateral surface (21) of said drawing drum (12) having a substantially concave profile which is included between two containment walls (22, 22′). Said profile is preferably symmetrical and has a substantially constant radius of curvature, equal to about the double of the distance between the containment walls (22, 22′) and to about ⅔ of the external diameter at the center of the drawing drum.

Abstract: A press roll device for applying pressure on a piece of wood moving along a path. The device has a frame mounted in proximity to the path of the piece of wood and a lower and an upper arm both pivotally connected to the frame. A roller is rotationally mounted on the end of the lower arm and a jack is resiliently connected to the corresponding end of the upper arm. A bag of compressed air is disposed between the ends of the lower and upper arm, resiliently separating the roller and the jack. In this manner, the bag of compressed air absorbs the vibration of the roller caused by unevenness in the piece of wood, at least partially.

Abstract: A welding wire feeding system feeds welding wire from a barrel to a welding gun. The system includes a feed mechanism for drawing welding wire from the barrel and advancing the welding wire toward the welding gun. A free-wheeling wheel is disposed between the barrel and the feed mechanism and is freely rotatable about an axis. The welding wire is wound around the wheel, whereby a curvature is imparted to an otherwise-straight welding wire. Also, any twists generated in the welding wire at the welding gun will be stopped at the wheel before reaching and fouling the barrel.

Abstract: A vertical heat treating furnace for passing a metal strip, therethrough for heat treatment and a hearth roll applied to a heating/soaking furnace of the vertical heat treating furnace are disclosed. The hearth roll can be configured such that the taper angle of each of first taper sections continuous to a flat section at a central portion of the hearth roll from a roll axial direction is larger than the taper angle of each of second taper sections continuous to each of the first taper sections from the roll axial direction. The length Lc (mm) of the flat section and the length L1 (mm) of the first taper section can satisfy the following relationships: 0.5 Wmin≦Lc≦Wmin and Wmin≦Lc+2×L1≦Wmax−400, where Wmin is the minimum width (mm) of the metal strip, and Wmax is the maximum width (mm) of the metal strip.

Abstract: A gripper block for use in grippingly engaging coiled tubing, pipe, rod, cable or like objects having various outside dimensions is provided. The gripper block has a gripping portion which includes a curved and a planar gripping surface. The planar gripping surface preferably includes a pair of opposed sloped planar gripping surfaces to engage coiled tubing, preferably steel coiled tubing of varying diameters. The sloped gripping surfaces preferably provide a V-shaped engagement configuration. The curved gripping surface is adapted to engage coiled tubing, preferably composite coiled tubing having a diameter less than the coiled tubing to be engaged by the sloped gripping surfaces.

Abstract: A modified film transport roller for use with film handling systems to prevent the sticking and bunching of film due to build-ups of static electric charges on the surface of the film. The modified roller has a strip or layer of magnetized polymeric material applied to the hub between the end supports or collars, but of a thickness less than the height of the collars. The film rests on the collars as it passes over the roller and through the magnetic field, but does not come in contact with the magnetized layer. Static charges are polarized by the magnetic field. As a result of the polarization of the static charges, sections of film are not attracted to one another and the film does not stick or bunch as it moves to and from the projector.

Abstract: A band product accumulation unit including a mechanism for controlling the running of a band along a longitudinal direction, a fixed frame, a wrap-around carriage which is moveable on a track between a return position of minimum accumulation length and an out position of maximum accumulation length, wherein movement towards the out position increases a length while movement towards the return position decreases the length, the band being adapted to pass over at least one return member mounted on the wrap-around carriage so as to form at least an out portion and at least a return portion and defined by at least two spaced levels, a plurality of intermediate supporting members arranged along the track, each comprising at least one separating arm extending horizontally on at least one intermediate level disposed between two running levels of the band, each separating arm being fixed to a shaft which is pivotal about a vertical axis with respect to the fixed frame, a mechanism for controling the pivoting of each

Abstract: A drive roller for a belt-driven tape cartridge is molded of composite polymeric material in a single step to include outer segment and inner segment integrally formed together with a radial web segment between the outer and inner segments to provide highly concentric operating surfaces on the outer segment and in the inner segment. Electrical conductivity throughout the molded drive roller is provided by including in the composite material a quantity of carbon powder, and selective shrinkage of the composite material during cooling from molding temperatures provides desirable bearing surface within the inner bore through the inner segment. Thrust bearing surfaces at the ends of the inner segment engage mating bearing surfaces that include lubricant traps to inhibit migration of lubricant away from the bearing surfaces of the drive roller.

Abstract: Angular deformation is caused in a portion of offset-printed web paper corresponding to an adjacent portion of each of side edges of two blankets of a blanket cylinder so that paper wrinkles are caused. To prevent the paper wrinkles from being caused, a contact roller 10 is arranged in a paper wrinkle preventing device such that a circumferential face of the contact roller can rotatably come in contact with the running web paper W in a rotary printing press having an offset printing portion P for printing the web paper W coming in contact with surfaces of two blankets B2 having side edges adjacent to each other at an approximately axial center of a blanket cylinder B. The contact roller 10 is arranged between the offset printing portion P and a drag roller D1. An equal diameter portion 101c is formed by a roller portion coming in contact with an area of the running web paper W coming in contact with an adjacent portion B1 of each of the two blankets B2 and a portion near this adjacent portion.

Abstract: A web and an associated web feeding and handling apparatus for performing a work operation on the web is disclosed. The apparatus feeds the web in a feed direction longitudinally of itself by means of a friction drive. The operation of the drive is controlled by lateral and longitudinal alignment indicia located on the web which insure that the web is properly aligned with the feed direction as the web is initially fed into and then through the apparatus, and to insure that any bowing of the web during the work operation is corrected or compensated for.

Abstract: A method of and apparatus for minimizing the problem of "fluting" or "corrugating" occuring in printed webs of light weight coated paper printed on both sides with thermosetting ink on heat-set web-offset printing presses resides in spreading the web in its width-wise direction as the printed web exits from the ink drying and heat setting oven of the press and passes over the web cooling chill rolls downstream from the oven, thereby to hold the printed web in a flat and smooth condition until it is cooled and the ink has taken a permanent set. Spreading the web prior to and during cooling allows the inks to thermoset in a flat state because the web is kept flat and free of flutes during thermosetting of the inks. The method and apparatus facilitate operation of the press at higher speeds and with lighter grades of paper than conventional, and provide for increased production efficiencies, lower costs, enhanced print quality, and access to new markets for web-offset printing.

Abstract: A fiber web transferring device comprising a conveyor belt, a suction cylinder, a lower calendering cylinder and an upper calendering cylinder. The suction cylinder having a stationary suction sector and rotates in a direction which corresponds to a linear moving direction of the conveyor belt. The suction cylinder transfers a non-consolidated fiber web from the conveyor belt to the lower calendering cylinder and is substantially tangential to the lower calendering cylinder so as to cooperate therewith to define a pre-calendering zone for the fiber web. The suction cylinder is positioned such that the suction cylinder sucks the fiber web from the conveyor belt and holds the fiber web against the outer surface of the suction cylinder to the pre-calendering zone. The fiber web then adheres to the outer surface of the lower calendering cylinder past the pre-calendering zone until the fiber web reaches the upper calendering cylinder.

Abstract: A dispenser for strand materials, such as solder, is provided. Also provided is a method for dispensing strand materials using the dispenser. The dispenser is hand-held, and includes a gear, which ratchetably rotates to selectively advance the strand material through the dispenser. The gear also creates indentations on the strand material, providing gauged lengths of strand material. The dispenser can be adapted to be refillable with standard size spools of solder, or can be adapted to feed solder from an external spool.

Abstract: The present invention provides a novel one-piece capstan for a tape cartridge which provides good static dissipative properties and wear resistance. The capstan material of the present invention has a charge decay time of no more than 5 seconds as measured according to Mil B-81705C standard. The capstan material also has a flexural modulus of at least 200,000 psi (1379 MPa). The capstan comprises a hard, dimensionally stable polymer and a static dissipating polymer. The capstan also has an improved structure and geometry which enables the part to be easily molded, reduces drive force requirements with a reduction of material from the prior art design, but with no significant loss of performance properties.

Abstract: A recording medium transporting apparatus is shown including a rowel spur. The rowel spur is designed to control the amount of ink adhering to the rowel spur, thus preventing image quality problems associated with slippage between the rowel spur and the recording medium and smudging of ink that is not adhered to the recording medium, as well as maintaining good transporting of the recording medium. The recording medium transporting apparatus transports a sheet shaped recording medium by using a rowel spur. Each tooth of the rowel spur is formed with a plate-like radially inner portion having a substantially constant thickness in a direction parallel to the central axis of the rowel spur, and a wedge-shaped radially outer portion. The wedge-shaped portion includes at least one slanted axial face that intersects a side of the tooth facing in the direction parallel to the central axis.

Abstract: A superstructure of a folding apparatus for feeding at least two webs of flat material to a cylinder unit of the folding apparatus. The superstructure including at least two take-off roller assemblies, each take-off roller assembly including a corresponding take-off roller rotatably mounted on the superstructure. At least one mantling is provided for mounting on an outer surface of each take-off roller in order to adjust a diameter of the corresponding take-off roller assembly. A drive assembly is provided for driving the at least two take-off roller assemblies, each of the at least two take-off roller assemblies having a respective circumferential velocity which is a function of the adjusted diameter of the take-off roller assembly.

Abstract: The invention relates to a device for the winding of a knitted material web which is being delivered from a warp knitting machine to a material roll by using an axial drive which is being regulated by sensors which measure the tension in the material web. For the purpose of winding a knitted elastic material, a spreader roller is arranged adjacent to the run-on site of the web onto the material roll and is held there with a constant gap. In order to maintain an essentially constant gap between the spreader roller and the material roll, the spreader roller undergoes a relative shifting along a radial guide.

Abstract: A pinch roller assembly for use in a video cassette recorder, which comprises: a pinch roller, a supporting shaft provided with a cylindrical section and a spherical portion protruding therefrom, a sleeve having an upper section, a lower section and a contact section joining them together, and a bush provided with a tapered surface. The spherical portion of the supporting shaft comes into a loose contact with the contact section of the sleeve and the tapered surface of the bush, and there exist gaps between the cylindrical section of the supporting shaft and the upper section of the sleeve and between the cylindrical section of the supporting shaft and the inner surface of the bush, respectively, to thereby allow the pinch roller to pivot about the spherical portion of the supporting shaft and to realign itself to be parallel with respect to a capstan shaft while it presses against a capstan shaft.

Abstract: A ticket dispensing device having a braking system for preventing unauthorized removal of tickets. A drive roller advancing the ticket strip through the device is connected to a brake wheel. Pulling on the ticket moves the brake wheel into a braking member to impede the rotation of the drive roller, and thereby prevent removal of tickets. The ticket dispensing device also includes a face plate which can be easily and quickly removed to eliminate ticket jams.

Abstract: A flywheel device for use in a magnetic recording/reproducing unit or the like which device is simple in construction, and can be produced at low costs, and a method of making it. A capstan shaft is press-fitted in a hole formed in a central portion of a metal disk, and then a resin is filled on an outer peripheral portion and a central portion of the disk by outsert molding to form an outer peripheral resin portion and a central resin portion. The outer peripheral resin portion has a groove formed in an outer periphery thereof, and the central resin portion has gear portions.

Abstract: A roll-up apparatus including a curtain suspended within a room to be divided or partially closed off and a roll member at the bottom edge of the curtain around which the curtain winds and unwinds. The curtain is raised by rolling the curtain up from the bottom around the roll member, and lowered by unrolling the curtain from around the roll member. Belts spaced along the width of the curtain are looped under the curtain wound roll member and windably attached to a motor driven take-up shaft. When wound around the take-up shaft, the belts are pulled upward to effect a rolling of the curtain around the roll member that raises the curtain. The belts are structured, such as by the provision of a coating material, to adhere to the material of the curtain to prevent belt slippage relative to the curtain and to thereby effect a relatively tight curtain winding. Crowned rollers which achieve a self-centering effect on the belts are also provided to cause the belts to wind about themselves on the take-up shaft.

Abstract: The present invention provides a tape driving apparatus capable of receiving a cassette tape to be mounted therein, the cassette tape including a magnetic tape and a take-up reel hub for winding the magnetic tape, the take-up reel hub having a first flange and a second flange for limiting movement of the magnetic tape along a direction of the width of the magnetic tape. The tape driving apparatus includes: a capstan for driving the magnetic tape; and a tape guide disposed in a tape travel path extending from the capstan to the take-up reel hub, the tape guide including a first flange and a second flange for limiting a travelling height of the magnetic tape, wherein a distance between the first flange and the second flange of the tape guide is larger than a distance between the first flange and the second flange of the take-up reel hub.

Abstract: A method and apparatus for reducing the wear of the belt mantle of an extended-nip roll including a resilient belt mantle arranged to revolve on support of bearings around a stationary central axle. The central axle has loading members connected with it, such as a loading shoe, which are pressed by the pressure of a loading medium, such as hydraulic fluid, towards a backup roll, whereby the belt mantle conforms to the shape of the backup roll in the area of the shoe. Actuators connected with the ends of the belt mantle are provided and act with a force upon the ends of the belt mantle of the extended-nip roll so that the direction of stretching of the belt mantle of the extended-nip roll is reversed alternatingly by controlling the actuators and/or locking devices which lock the ends of the belt mantle.

Abstract: A dancer bar including a plurality of segments flexibly linked together is provided. Preferably, the segments are selectively connectable to provide a dancer bar having a length which substantially equals the width of an associated web of sheet material. A sheet material feed mechanism including the segmented dancer bar and an apparatus for performing a work operation on sheet material including the feed mechanism are also provided.

Abstract: A guide roller assembly for use in a recorder fulfilling the functions of both a conventional guide roller assembly and a conventional impedance roller assembly comprises a stationary shaft tightly fitted into a bore hole prepared in a pole base, a lower flange tightly fitted around the stationary shaft, a guide roller, rotatably fitted around the stationary shaft, and including an upper drum-like section and a lower cylindrical section having a diameter smaller than that of the lower flange, an upper flange, provided on the cylindrical section of the guide roller, and a shallow notch which circumscribes the cylindrical section of the guide roller, directly below the upper flange.

Abstract: A remotely controllable retractable lifeline extender having an electric motor attached thereto to provide powered payout and retraction of the lifeline to a user located below. The remote retractable lifeline extender may be fastened to the ceiling or rafter of a structure, or to some other sturdy structural component thereof having a great deal of clearance below the connection point. The device is actuated by a hand-held remote control unit used by the worker to be attached to the lifeline. By activating the remote control unit, the lifeline is lowered to the worker by the motor-powered unit. The lifeline is attached to the worker's safety belt or harness by a fastening member such as a locking snap hook or carabiner.

Abstract: An apparatus for treating a cloth strip comprising a treatment zone with an entrance and exit for the cloth strip. The cloth strip is treated while running along a predetermined spiral path through a treatment zone. A plurality of conveying rollers are provided in the treatment zone. The conveying rollers have portions which are fixed to a rotary shaft and portions which are loosely connected to the rotary shaft such that the loosely connected portion may rotate about the shaft.

Abstract: A tape cartridge with minimal tape tension variation and a method of making the same. The tape cartridge includes a supply-side tape reel around which a tape is wound and a winding-side tape reel both rotatably mounted to a base. At least one pin having a first end is attached to the base. At least one roller having a through-hole is rotatably engaged with the pin. Grease is interposed between the at least one pin and the through-hole. A second end of the pin includes a recess opening in an axial direction of the pin. The recess has a volume greater than a volume of excess grease accumulated on an end portion of the pin during mounting the roller on the pin. The roller may be an idler or drive roller for a belt-driven tape cartridge or a tape reel.