Abstract: A slab transport tire roller includes a tire which is diminished in thermal stress. A tire assembly disposed at each of outer peripheral portions of a pipe for passing cooling water therethrough includes the tire adapted to contact a slab, support members connecting the tire to the pipe, and rotation preventing means engaging the tire with the support members to render the tire rotatable with the support members.

Abstract: The mounting for a roller shaft in the frame of a conveyor is designed to reduce the vibration of the shaft and the sound produced during conveyor operation. In several embodiments, the end of the shaft is provided with a taper, and a spring which is internal to the roller is used to bias the taper into the mounting hole. The resulting tight fit of the taper in the hole greatly reduces the vibration energy of the shaft. In another embodiment, a bushing separates the shaft and the hole and is designed to grip the shaft as it is pressed into place in the hole.

Abstract: A split transport wheel is described including first and second wheel halves, each having an arcuate external tire receiving surface spanned by a joint surface. The two halves may be selectively assembled with the joint surfaces in juxtaposition and with the tire receiving surfaces forming a relatively continuous tire receiving surface. A clamp assembly releasably joins the first and second wheel halves and is selectively operable to (a) draw the respective joint surfaces together in juxtaposition and (b) release the first and second wheel halves to be separated. A tire, formed of a strip of tire material, may be releasably wrapped about the tire receiving surfaces of the wheel halves. A first tire end anchor on the first wheel half releasably receives one of the strip ends, and a second tire end anchor on the second wheel half releasably receives the remaining tire strip end.

Abstract: A roller insert for a conveyor roller tube includes a substantially cylindrical cartridge which is shaped to be press fitted into the tube, and may be removable and replaceable. The cartridge has an outboard lip shaped to engage an outer edge of the roller tube and includes a side wall and an annularly shaped inboard backstop. A stub axle is positioned within the cartridge and has a hex shaped tip, which preferably is tapered, projecting outwardly to engage a mounting hole in a conveyor frame. Inboard and outboard bearings are provided to allow rotational movement of the cartridge relative to the stub axle and conveyor frame. The axle includes a retainer, such as a key or bead, which engages the outboard bearing to prevent overextension of the axle. A bushing is mounted on the outboard bearing to facilitate slidable movement of the axle relative to the bearings. A coil spring biasing member is mounted on the axle to urge the axle outwardly from the cartridge.

Abstract: A conveyor, comprising a conveyor frame having a pair of spaced side members each having a plurality of mounting means to mount a plurality of rollers in spaced relation between the side members, each roller being provided with a bearing means having a socket, the rollers being mounted in spaced relation between said pair of side members on stub spindles, each stub spindle having a support portion which inter-engages with a mounting means non-rotatably to mount the stub spindles on the side members, there being a pair of opposed stub spindles for each roller and each stub spindle having an end portion which is received in a socket provided at each end of the roller to permit each roller to rotate about a roller axis and wherein at least at one end of each roller the support portion and the mounting means are configured for inter-engagement by relative movement therebetween transverse to said roller axis characterised in that each stub spindle is provided with retaining means to retain the end portion of the s

Abstract: A ramp is used for loading and unloading recreational vehicles, especially snowmobiles, trucks, trailers and the like. The preferred ramp is a three section ramp with two outer sections and a center section connected to fold from side to side for storage and transport purposes. Each outer ramp section is equipped with a series of rollers spaced along the ramp section to allow the skis of a snowmobile to advance along the ramp without binding. The rollers are preferably made with a rigid core and a rotating outer sleeve of PVC. The tubing is slit helically from end to end so that it can be removed and installed without dismantling the ramp. The center section of the ramp is equipped with lateral cleats.

Abstract: A roller apparatus for a corrugator machine comprises a tubular mantle secured to a central core. Circumferential grooves are provided in the surface of the roller. The grooves provided at the centre of the roller are inclined at an angle ".alpha." which is less than the angle of inclination ".alpha." of the grooves provided at the outer regions of the roller.

Abstract: A medical table includes a base. The medical table also includes a number of rollers, supported by the base, which collectively define a bed surface for supporting a patient, wherein each roller of the number of rollers (1) defines a fluid impervious bag having a void therein, and (2) contains a plurality of beads within the void of the fluid impervious bag, and further wherein the number of rollers includes a prime roller having a shaft extending therefrom. The medical table further includes a motor mechanically coupled to the shaft of the prime roller. The medical table also includes a vacuum source in fluid communication with each void of the number of rollers. A method of moving a patient from a first position to a second position is also disclosed.

Abstract: A runway for conveying glass tubing, as the tubing is drawn from a source of molten glass, embodies support assemblies having rotating sleeves mounted on guide shafts to contact the tubing. A circulating humid atmosphere is maintained in an enclosure during an initial portion of the tube draw to reduce frictive damage to the tubing.

Abstract: A roller assembly is disclosed for an agricultural conveyor apparatus including an endless conveyor supported on one or more roller assemblies mounted on a support frame. The roller assembly includes a conveyor support roller having a central bore formed therein and bearing supports formed on the roller for receiving a clamping force imparted by a pair of opposing bearings that support the roller. An axle is mountable to a frame portion of an agricultural conveyor apparatus and extends through the central bore of the roller. A clamping bearing assembly is provided for rotably securing the conveyor support roller to the axle. The bearing assembly includes a pair of bearings having radial inner portions secured for axial adjustment on the axle and radial outer portions configured to apply a clamping force on the bearing support portions of the roller.

Abstract: The mounting for a roller shaft in the frame of a conveyor is designed to reduce the vibration of the shaft and the sound produced during conveyor operation. In several embodiments, the end of the shaft is provided with a taper, and a spring which is internal to the roller is used to bias the taper into the mounting hole. The resulting tight fit of the taper in the hole greatly reduces the vibration energy of the shaft. In another embodiment, a bushing separates the shaft and the hole and is designed to grip the shaft as it is pressed into place in the hole.

Abstract: There is provided an idler roll for use in belt conveyor systems comprising a shaft and at least two modular sections disposed adjacent to one another surrounding the shaft, the at least two modular sections varying in thickness as measured along an axis of the shaft. There is also provided an idler roll for use in belt conveyor systems comprising a shaft and a molded polymer coating disposed around the shaft, wherein the coating is at least partially tapered in cross section at each end of the idler roll. There is further provided a belt conveyor system for handling bulk material employing idler rolls.

Abstract: The invention is embodied in a conveyor roller noise-isolator and wear-prevention system for mounting a conveyor roller to a conveyor system support frame. An apparatus is provided in which a conveyor roller axle is mounted to a conveyor side frame by a resilient bushing which serves to isolate the noise generated at the roller, prevent the noise generated at the interface between the axle and the frame, and prevent wear on the axle and the frame. The bushing achieves these goals by eliminating metal-to-metal contact at the mount interface and by having interference fits with the axle and with the frame to prevent relative motion.

Abstract: There is provided an idler roll for use in belt conveyor systems comprising a rotatable outer seal member disposed on at least one end of the idler roll, the outer seal member comprising at least one blade. There is also provided a seal assembly for use on an idler roll comprising a rotatable outer seal member, the outer seal member comprising a plurality of vanes. There is further provided a conveying system comprising a conveyor belt, and an idler roll, the idler roll comprising a rotatable outer seal member disposed on at least one end of the idler roll, the outer seal member having a plurality of blades, wherein the outer seal member is energized by the movement of the conveyor belt.

Abstract: The present invention relates to a variable compressibility layer in rollers or flat pulleys. The present invention provides a smooth-surface roller that will "spread" a web being conveyed by a roller, or urge flattening and prevention of wrinkles in the web. It will also assist in the centering of the web being conveyed on web-handling equipment. If a roller is small, it may be used as a flat pulley, wherein the present invention causes a belt to track in the center of the pulley.

Abstract: In order to simplify the manufacture of a roller bearing (1) in which a cylindrical roller (14) is mounted on a central shaft (3) which extends out beyond the ends of the roller (14) and whose ends (4, 5) are fitted in a mounting (8), the invention proposes that at least the ends of the shaft (3 ) are hollow and that at least part of the wall (11) of the cavity thus formed is secured in position against the outer surface (12) of the mounting (8) by bending it round or beading it over. This avoids the need for a split-pin to secure the shaft (3).

Abstract: A slip roller conveyor has parallel side walls and a plurality of driven slip roller assemblies mounted therein. Each driven assembly comprises a stub shaft that is threadedly mounted in the side wall and has a wrench-engageable head. A pulley with a sleeve extension is rotatably mounted on the shaft and a slip roller is mounted on the sleeve. The entire driven slip roller assembly is easily removed from its wall mounting by simply engaging the head with a wrench and unscrewing the shaft from its wall mounting. The conveyor drive system includes a positive drive belt having its grooves and teeth intermeshed with mating grooves and teeth on the driven pulleys. A side edge of the belt is guided by the inner surface of the conveyor side wall. A guide strip having an anti-camming surface keeps the drive belt intermeshed with the pulleys along the drive run of the drive belt.

Abstract: Pressure-sensitive adhesive-backed labels are carried adhesive back side down on a backing strip. The present method and apparatus completely removes each label from its backing material and then may relocate, manipulate, or hold the label by its adhesive back side before it is attached to a passing article. The apparatus may be arranged to dispense the labels along an axis parallel to the path of travel of the moving article or along an axis that crosses the path of travel of the moving article.

Abstract: The invention concerns a pallet-support rail for the conveyance of pallets and containers, the rail having a pallet-support chain (2, 2a to 2d) designed in the form of a roller chain with a multiplicity of support rollers (11) spaced one behind the other at equal intervals, a rolling surface (4) on which the rollers (11) run and a multiplicity of support links (9) connected to the rollers (11) and designed to be displaced by the rollers (11) along the rolling surface (4). The invention ensures ease of operation and compact design by virtue of the fact that means for lateral control of the support rollers (11) are fitted to the support rollers (11).

Abstract: A conveyor roller is provided including a first, elongated hollow cylindrical member having opposing ends. A second, elongated cylindrical member is disposed concentrically within the first cylindrical member has opposing ends and an outside diameter smaller than an inside diameter of the first cylindrical member so as to define a gap between an outer peripheral surface of the cylindrical member and an inner peripheral surface of the first cylindrical member. Shaft structure is coupled to the second elongated cylinder so as to extend beyond the ends thereof. Fluid lubricant is in the gap. Retaining structure is constructed and arranged to retain the second cylindrical member within the first cylindrical member in such a manner that the first cylindrical member may rotate freely about the second cylindrical member upon the fluid lubricant.

Abstract: A rail loading train for transporting as well as loading and unloading long rails includes a loading car with a frame which is supported on undercarriages for movement in an operating direction. Mounted on the frame of each loading car are a plurality of spaced rail supports for carrying the long rails. Each rail support includes a shaft which is swingably mounted at one end to a column and is shiftable between an idle position in which the shaft extends longitudinally in direction of the track and a receiving position in which the shaft extends across the frame. The shaft is provided with a number of neighboring pairs of flange rollers, with each flange roller having at least one end provided with a flange.

Abstract: A roller track for a storage rack arranged for gravitational flow of load-bearing pallets having two walls disposed in parallel relation to each other and a plurality of freely rotatable rollers journalled between the walls, each on a spindle, in such manner that the rollers extend upwardly from a space between the walls. Each wall has a separate aperture associated with a respective one of the rollers. Each roller is journalled on a spindle. Each end of the spindle has a shoulder portion larger than the associated aperture. Also, each end of the spindle has a pintle portion extending outwardly through the associated aperture, beyond the outer surface of the wall having the associated aperture. The roller track further has structures for securing at least some of the pintle portions to each wall where the secured pintle portions extend outwardly beyond the planes defined by the outer surfaces of such wall.

Abstract: First and second shafts are held on first and second guides and a belt is wrapped on the first and second shafts. A motor is mounted on the first guide and rotationally drives a belt. The belt has a surface inclined from its opposite-side edges downward toward its middle to define a recess at the middle of the belt along a conveying direction of the belt. The lead frame is so conveyed that only its opposite-side edges as viewed along the conveying direction of the lead frame are contacted with the surface of the belt and that a bed and leads placed at the middle portion of the lead frame are not contacted with the surface of the belt.

Abstract: A roller assembly having modular replaceable and interchangeable components for use in agricultural machines having endless conveyors with edges which pass over or under roller assemblies. The roller assembly has a long wearing resilient outer tire which is secured to a hub assembly. The hub assembly is comprised of two hub members having central bores forming a cavity within which resides bearings. The bearings are selectively sealed with a resilient washer element. A spacer on each respective end of the roller assembly is optionally added to accommodate mounting to a machine frame and for repair. An optional flange attaches on one side of the roller to help align the conveyor. The modular components may be packaged to provide a kit of parts usable for modular assembly, repair, or replacement purposes.

Abstract: Disclosed is a roller assembly of the type comprising a roller body provided with opposed ends, a shaft, a bearing having an inner portion and an outer portion and a casing for housing the bearing and a portion of the shaft. The casing has an exterior contacting a corresponding portion of the interior of the roller body and an interior contacting the outer portion of the bearing. The second part of the roller assembly is made of a cured material filling a gap existing between the exterior of the first part of the casing and the interior of the roller body. The material has been introduced in said gap in a fluid state and cured "in situ" without any shrinkage. The roller body according to the invention is more resistant and easier to manufacture. Also disclosed is an efficient method for manufacturing the roller assembly.

Abstract: A hollow shaft tube and shaft member with functional members like a paper feed roller for business machines etc., and its manufacturing method.The shaft tube has a bulge and dent, thereon a functional member to be fixedly secured. The bulges and dents having spring effect are formed symmetrically concerning the shaft tube center axis. The shaft and the functional members are fixedly secured by the spring effect.The shaft tube is made with half molds, having punchs in holes of both halves. The punchs hit the tube set in the molds to form the bulge and dent. The shaft tube is pressed in the functional member, using a press-in tool, to construct the shaft member.

Abstract: In a movable plate (1) of an injection moulding machine, there are arranged a threaded hole (29) and a supporting hole (28) in series in the substantially horizontal direction. A supporting portion (22) of a support cylinder (12) is fitted into the supporting hole (28), and a roller member (14) is externally rotatably fitted to a bearing portion (23) of the support cylinder (12). An annular flange portion (25) is provided between the supporting portion (22) and the bearing portion (23). An outer diameter (D) of the flange portion (25) is so set as to be larger than an inner diameter (A) of the supporting hole (28) and to be smaller than an outer diameter (B) of the roller member (14). The bolt (16) is screwed into the threaded hole (29) so as to press the flange portion (25) onto the movable wall (1) through the support cylinder (12).

Abstract: A roller for a conveyor comprises a roller shaft, a generally cylindrical roller tube rotatably mounted to the roller shaft, and an axially moveable shuttle disposed at one end of the roller shaft. The shuttle is moveable between an extended position and a retracted position. A spring biases the shuttle to the extended position. The shuttle has a tapered-end portion which mates with a mounting hole in a frame member supporting the roller. The spring urges the tapered-end portion of the shuttle into engagement with the mounting hole in the frame so as to eliminate play between the shuttle and the mounting hole.

Abstract: A conveyor roller assembly comprises a roller supported at opposite ends on first and second opposing end supports with first and second axle members. Each of the axle members comprises a stub axle having one end securely fixed to a mounting flange. Each mounting flange is attached to a respective one of the end supports with the stub axles protruding into an adjacent end of the roller for supporting the roller between the end supports. A bearing member is inserted in each end of the roller for engaging the axle members. Preferably, the mounting flange comprises a molded plastic element having a generally flat, elongated configuration with a pair of spaced apertures for passing of mounting screws therethrough.

Abstract: A system of rollers that form a conveyor for parcels. The roller units are made up of segmented roller elements so that the parcels can be conveyed in any horizontal direction. Each roller unit has a plurality of spokes to maintain the segmented roller elements in position. A replaceable bearing unit permits the series of roller units to be accommodated on shafts of various configurations.

Abstract: Pressure-sensitive adhesive-backed labels are carried adhesive back side down on a backing strip. The present method and apparatus completely removes each label from its backing material and then may relocate, manipulate, or hold the label by its adhesive back side before it is attached to a passing article. The apparatus may be arranged to dispense the labels along an axis parallel to the path of travel of the moving article or along an axis that crosses the path of travel of the moving article.

Abstract: An inventive roller and an inventive conveyor assembly which includes at least one such roller. The inventive roller comprises: an axle housing; a polymer foam segment positioned around the axle housing; and a polymer coating which covers the exterior of the polymer foam segment.

Abstract: A belt conveyor roller includes a main shaft (2a); a pair of rolling bearings (3) mounted next to the ends of the main shaft (2a); a cylindrical tubular body (4), surrounding the main shaft (2a) and incorporating, inside each opposite end, a cylindrical tubular sleeve (5), having a smaller diameter and being seated on the external path of the respective rolling bearing (3); and a sealing element (50) concentrically disposed in relation to the main shaft (2a), at each end of the latter that is external to a respective rolling bearing (3), wherein an external edge (51a) is attached to the cylindrical sleeve (5), and wherein an internal free edge (52b) is in permanent contact with the surface of a shaft end portion with reduced diameter.

Abstract: In a lower portion of a movable plate (1) of an injection moulding machine, there are provided a plurality of conveying rollers (10) arranged with a predetermined interval in the horizontal direction. The roller (10) comprises a support block (11) facing the movable plate (1), a support cylinder (12) fitted into an upper portion of the block (11), a roller member (14) externally mounted to the support cylinder (12), a bolt (16) inserted into a bore (15) of the support cylinder (12) through an annular clearance (17) and a positioning pin (18) fitted into a lower portion of the block (11) and the movable plate (1). The bolt (16) is screwed into the threaded hole (29) of the movable plate (1), so that the bolt (16) presses the support cylinder (12) onto the movable plate (1).

Abstract: Highly compressed ceramic fiber conveyor rolls can provide desirable insulation coupled with extended wear for roller conveying of high temperature articles such as freshly made sheet glass. However, under harsh industrial conditions, as experienced with the conveying of heavy loads consistently at the upper end of operable temperature ranges, such ceramic fiber rolls may be subject to premature wear at the interface between an inner shaft and an outer ceramic fiber roll cover, as well as experience longitudinal roll cracking of the cover. It has now been found that both of these potential cover problems can be successfully addressed by placement within the cover of perforated, rigid disks. Such disks placed occasionally along the roll and within ceramic fiber cover, are particularly suitable for use with hardened covers, where the hardening is more concentrated towards the surface of the cover and the disks are present within a softer inner fiber core of the cover.

Abstract: The present invention pertains to a device for supporting a conveying roller of a roller kiln.

Abstract: A developer for sheets of dry silver media includes an oven having a film entrance and a film exit. A bed of spaced rollers of low thermal conductivity foam material is positioned within the oven between the entrance and exit. A roller drive mechanism rotates the rollers causing the film to be transported through the oven and developed without visible patterns.

Abstract: The head (11) (40) of a belt conveyor roller is press-fit into a cylindric shell (10) of the roller. The head (11) (40) defines a bearing chamber (12) for a frictionless bearing (14-15; 42) which is closed by a ring assembly (21, 29) welded to the head and provided, in the embodiment disclosed, with a stainless steel lamella (33, 59) the opening (60) of which bites into the resilient outer cylindric surface (61) of a hub section (28, 53), to provide a virtually hermetical enclosure of the bearing chamber (12, 41) thus increasing the safety of the operation by isolating the possible point of ignition or explosion on seizure of the bearing (14-15; 41) of the roller. The roller equipped with the assembly of the present invention thus presents a further improvement in the art of belt conveyors for use in hazardous environments.

Abstract: The construction of a conveyor roller, for handling heavy corrosive loads such as large lead-acid type batteries of the type used in forklift trucks and the like, is made corrosion-resistant by utilizing two appropriate plastic materials: one for an electrically insulated resilient roller body and the other for a pair of rigid corrosion-resistant long-life sleeve bearings which never require lubrication. The roller body may be cut to length from continuously extruded plastic hollow bar material such as PVC, providing an economical roller with a resilient surface. The sleeve bearings, pressed into recesses at each end of the roller, made from plastic rod material such as polypropylene having suitable rigidity and bearing properties, engage the roller rotatably on a steel shaft which is captively mounted in a conveyor assembly. The central bore of the roller portion is dimensioned to provide a designated clearance around the shaft.

Abstract: A printing mechanism such as a thermal printer includes an elastomer coated platen having a circumference smaller than the printing length of an image to be reproduced on a print medium. The platen has a width which is wider than the width of the print medium. The platen includes a rigid central longitudinally-disposed shaft, and opposing end sections. Each end section extends under the nearest edge of the print medium from an associated end of the platen, and includes means for coupling a contacting print medium to a rotation of the shaft. In a preferred embodiment, the coupling means is formed of a non-elastomeric thin-walled cup either disposed near the surface of the platen within the elastomer coating or at the surface of the platen with a thin layer of fine grit particles formed thereon. Each thin-walled cup is fixedly connected to the shaft by a rigid torsion coupling member.

Abstract: An insulating roller cover is now disclosed that provides a highly desirable combination of features. The cover is free from asbestos and is therefore of more desirable construction for handling and use. For the roller cover, at least substantially ceramic fiber is highly compressed, providing a dense and refractory, elevated temperature resistant insulating cover. The cover may itself serve as a load bearing surface; or may provide a foundation or protective media for annular discs or sleeve members made of various, load bearing materials. These load bearing materials may be unable to resist direct contact with the shaft due to thermal shock or the differences in their respective expansion and contraction rates. Where impregnant is utilized with the highly compressed fiber, such will often comprise a colloidal substituent.

Abstract: A weldable urethane roller sleeve, and method of fabricatingly installing the same, on site without having to remove the rollers from a machine in order to accomplish installation upon either powered or idler rollers of a roll conveyancing machine of that type typically employed in shear line applications to accomplish movement of reinforcing rods to and from a cutting station, wherein the inside diameter of the roller sleeve which is installed is oversized to be slightly larger than that of the outside diameter of the roller upon which it is installed, thereby enabling the roller sleeve to rotate upon the roller as the roller rotates, which in turn results in reduced wear and impact damage to the roller sleeve since it rotationally displaces with the moving product during the conveyancing thereof.

Abstract: A low mass transport shaft is formed by crimping a thin wall tube to form two opposed grooves along the length of the shaft. The two grooves impart rigidity to the tube structure enabling it to be used for such purposes as a paper transport shaft. In the embodiment shown, a pair of feed rollers are rigidly attached along predetermined points on the shaft, the rollers rotate with the shaft, and serve to move objects in contact therewith such as paper along a predetermined path.

Abstract: A composite table roll for use in roll tables in metal rolling mills, particularly for handling hot metal workpieces, having a sleeve portion which is tightly secured to an underlying arbor only at the axial mid-portion so that the end-portions of the sleeve are not in contact with the arbor sufficient to cause any significant heat conductivity thereacross and the end-portions are free to thermally expand with reference to the arbor to thereby greatly minimize any thermal distortion of the arbor in the event a hot metal workpiece becomes stalled on the roll table.

Abstract: A conveyor system includes a base member affording a bottom member of a track having an entry end and an exit end, between which articles are required to be conveyed. The base member is provided with a plurality of sockets at respective mutually spaced locations distributed longitudinally and transversely of the track, each socket having a load supporting member mounted therein so as to be independently rotatable about an axis of location extending transversely to the track. A mounting rotatably carries the load supporting member and cooperates with the socket, each such mounting comprising a pair of separate mounting parts. The mounting parts are engaged with opposite end portions of the load supporting member so as to carry the load supporting member between the mounting parts for rotation about the axis.

Abstract: A caster roller unit for a freight conveyor track includes first and second support rollers to support the freight articles from below. The rollers are mounted on a roller carrier rotatably independently of each other about horizontally extending, mutually aligned axes. The roller carrier is supported on a stationary housing base member by a ball bearing assembly rotatably about a vertical axis which is eccentric with respect to the axis of the rollers. The roller carrier, for each of the support rollers, has an upwardly open bearing shell member in the form of a cylinder portion accommodating a plurality of bearing needles on which the respective support roller is rotatably disposed and the longitudinal axes of which are oriented parallel to the horizontally extending axis of rotation of the respective support roller.

Abstract: A cluster for a material handling conveyor in which a plurality of rollers are mounted on a body member at an acute angle to a driven shaft, with bushing pressed into and recessed from each end of each roller to provide a consistent frictional force between the rollers and the member under various conditions of moisture.

Abstract: This invention relates to a conveyor pulley and more particularly to a roller for the pulley which is made from a suitably bonded particulate material such as silica sand.

Abstract: A roller track for a storage rack arranged for gravitational flow of load-bearing pallets. Freely rotatable rollers are journalled, each on a spindle, between two parallel walls. Rollers of a first group are journalled on spindles bolted to the walls. Rollers of a second group are journalled on spindles held by but not bolted to the walls. Each of the latter spindles has, at each end, a shoulder portion larger than an aperture in one of the walls and a pintle portion fitted into the aperture. The pintle portion has a cylindrical wall and the aperture has a cylindrical margin. Along at least a substantial portion of the roller track, every third roller is a roller of the first group while every other roller is a roller of the second group.

Abstract: A roller track for a storage rack arranged for gravitational flow of load-bearing pellets. Freely rotatable rollers are journalled, each on a spindle, between two parallel walls. Rollers of a first group are journalled on spindles bolted to the walls. Rollers of a second group are journalled on spindles held by but not bolted to the walls. Each of the latter spindles has, at each end, a shoulder portion larger than an aperture in one of the walls and a pintle portion fitted into the aperture. The pintle portion has a cylindrical wall and the aperture has a cylindrical margin. Along at least a substantial portion of the roller track, every third roller is a roller of the first group while every other roller is a roller of the second group.