Abstract: A paper-feeding roller (3) including a core (2) and a rubber roll (1) mounted on a peripheral surface of the core (2). The rubber roll (1) has a three-layer construction composed of an inner layer (11), an intermediate layer (12), and an outer layer (13). The inner layer (11), the intermediate layer (12), and the outer layer (13) are a non-foamed layer respectively. The JIS-A hardness of the inner layer (11) is set to not more than 10 degrees. The JIS-A hardness of the outer layer (13) is set to a range of 25 to 60 degrees.

Abstract: A mounting scheme for a drum maintenance unit oiling roller assembly utilizing an end cap keeps the roller center justified on the image and/or keeps the oiling part of the roller centered on the image through a wide range of roller variation.

Abstract: The present invention provides a double-sleeved roller for use in an electrostatographic machine. The double-sleeved member includes a cylindrical rigid core member. A removable inner sleeve member (ISM) is provided that includes a compliant layer that surrounds and intimately contacts the rigid core member. A removable electrically conductive outer sleeve member (OSM) such that the OSM surrounds and intimately contacts said ISM wherein the ISM and OSM are removable or mountable simultaneously.

Abstract: A developing roller including a semiconductive rubber member having not less than two vulcanized layers including a base layer composed of a vulcanized electro-conductive rubber composition and a surface layer composed of a vulcanized rubber composition. An electric resistance value of the base layer is set to not more than 107?, when the electric resistance value of the base layer is measured by applying a voltage of 100V thereto at a temperature of 10° C. and a relative humidity of 20%. An electric resistance value of a laminate of all layers including the base layer and the surface layer is set not more than 107? in the same condition as the above-described condition in which the electric resistance value of the base layer is measured.

Abstract: A folding and sealing apparatus supporting a feed platform for feeding a supply of pre-glued forms to the folding and sealing apparatus. The housing accommodating a first roller, a second roller, a third roller and a fourth roller, and the first and second rollers forming a first nip, the second and third roller forming a second nip and the third and fourth roller forming a third nip. A motor drives at least one of the rollers via a drive mechanism. At least one of the rollers having a resilient portion to accommodate an object mounted on a form, passing through the nips while maintaining appropriate folding and sealing pressure on the supporting form to provide a sufficient sealing pressure to the folded form, as the folded form passes through the nips to facilitate both folding and sealing of the folded form.

Abstract: A developing roller is provided having an elastic layer and a surface layer superposed thereon. The surface layer is formed of a resin material containing nitrogen atoms, and contains at least two types of particles, organic-compound particles (M) and organic-compound particles (N). The particles (N) are composed of nitrogen-containing heterocyclic-compound particles. The number-average particle diameter of the particles (N) in the surface layer is smaller than the number-average particle diameter of the particles (M) in the surface layer. Where the universal hardness of the elastic layer is represented by A and the universal hardness of the developing roller is represented by B, they satisfies 0.9?B/A?1.8.

Abstract: A feed wheel includes a hub and a discontinuous tread removably fitted about the hub. At leading and trailing ends of the discontinuous tread are mateable non-planar female and male surfaces which interfit with one another and tend to interlock the tread ends together. The tread has locking lugs formed under leading and trailing ends and an intermediate segment of the tread which fit into holes configured and located in the hub complimentarily to the locking lugs. The holes and locking lugs are oriented relative to one another so as to enable the tread to be retained about the hub with the tread ends interlocked together during operation of the feed wheel.

Abstract: A follower roller is brought into press contact with a driving roller by a load having a predetermined value, thereby being rotated in accordance with a rotation of the driving roller to transport the medium clamped therebetween in a first direction. The follower roller includes a shaft portion and a roller body provided so as to surround the shaft portion. The follower roller is configured such that a value of a ratio f/F is not greater than 0.03. Here, F is a force transporting the medium in the first direction which is generated by the load, and f is a resistance force generated in a second direction opposite to the first direction by a friction loss of the shaft portion of the follower roller which is generated by the load.

Abstract: The invention provides a roller having excellent flexibility and wear resistance. The invention also provides a sheet delivery unit equipped with this roller. The unit is prevented from being clogged up with sheets due to rigidities of the sheets. Also, simultaneous delivery of plural sheets is suppressed. The allowable range of rigidities of paper currencies and the allowable range of their widths can be extended. The roller has a central portion extending along an axis, an outer peripheral portion formed around the central portion and made of a resilient body, and plural helical ribs connecting together the central portion and the outer peripheral portion. Each rib consists of a resilient body. Each rib is so shaped as to thicken gradually from the central portion toward the outer peripheral portion.

Abstract: An electrically conductive roll includes a shaft body and at least a conductive elastic layer formed by extrusion on an outer circumferential surface of the shaft body. The conductive elastic layer is formed from at least one conductive rubber composition which includes a rubber material, a thermoplastic resin having crosslinkable double bonds and a melting point in a range from 40° C. to 100° C., and at least one conductive agent. The thermoplastic resin is included in an amount of 5 to 50 wt. % of a total amount of the rubber material and the thermoplastic resin.

Abstract: An electrically conductive roll includes a center shaft, an electrically conductive elastic layer formed on an outer circumferential surface of the center shaft, and a resistance adjusting layer formed radially outwardly of the electrically conductive elastic layer. The resistance adjusting layer is formed of a rubber composition which includes a rubber material, a thermoplastic resin having crosslinkable double bonds, at least one electron-conductive agent, at least one ion-conductive agent, and at least one electrically insulating filler. The thermoplastic resin, the at least one electron-conductive agent, the at least one ion-conductive agent, and the at least one electrically insulating filler are included in the rubber composition in respective amounts of 3-40 parts by weight, 10-150 parts by weight, not greater than 2 parts by weight, and 20-80 parts by weight, per 100 parts by weight of the rubber material.

Abstract: A roller particularly suitable for applying varnishes onto sheet metal plates comprises a hollow roller core (10). The hollow roller core (10) is connected with pins (16,18) via coupling elements (20,22) arranged in the interior of the roller core (10). With respect to the front faces (26), the coupling elements (20,22) are arranged so as to be inwardly offset. Air exit openings are provided in a border region (28) of the roller core (10). A channel forming element (34) is provided to connect the air exit openings (32) with a roller interior (44). Through the channel forming element (34), a channel (36) is formed connected with the roller interior (44) via the opening (42) provided in the coupling element (20).

Abstract: A gapless printing system includes a cylinder assembly and a printing sleeve. The cylinder assembly includes a compressible layer located between an inner shell and an outer shell. A support carrier is coupled to the inner shell about each of the first and second end portions and is adapted such that the cylinder assembly is mountable in a printing press. A printing sleeve is removably attachable to the cylinder assembly by installing the printing sleeve over the outer shell such that when the printing sleeve is mounted on the cylinder assembly, lateral and rotational motion of the printing sleeve with respect to the cylinder assembly is prevented.

Abstract: Subassembly of at least two machine parts, the outer machine part, in particular a tensioning roller with a running disk made of steel being fastened with its internal circumferential surface on an external circumferential surface of the inner machine part a raceway ring of a rolling bearing, by means of compression connection, wherein the overlap of the internal diameter of the outer machine part, in particular the running disk, and of the external diameter of the inner machine part, in particular raceway ring, and the dimensions of the machine parts and their materials are selected such that the outer machine part, in particular the running disk, is deformed into the plastic range of material strain.

Abstract: A plate cylinder has a cylinder body having a cylinder body outer surface for a first image to be printed and a first end, and a shell having an inner surface circumferentially disposed about the first end and having a gap for holding a printing plate, the shell being axially and circumferentially moveable with respect to the first end and having a shell outer surface for a second image to be printed, the inner surface having at least one projection directed inwardly, the gap extending into the projection.

Abstract: A roller including: an outer peripheral portion coming into contact with a sheet; an inner peripheral portion; and a plurality of connection ribs for connecting the outer peripheral portion and the inner peripheral portion to each other, in which the outer peripheral portion and the inner peripheral portion have a cylindrical configuration and are arranged concentrically, and in which the connection ribs are inclined by a predetermined angle with respect to a straight line radially extending from an axis of the roller.

Abstract: A device for manufacturing a printing blanket includes a base sleeve, a liquid applicator applying a radiation-curing polymer to the base sleeve, and a radiation source curing the radiation-curing polymer. A method for forming a tubular printing blanket includes placing a radiation-curable polymer over a base so as to form a layer of a printing blanket, and curing the radiation-curable polymer using a radiation source.

Abstract: A roll has a base material layer, a front surface layer, and stress relaxation layer. The base material layer is made of low hardness rubber material and provided on an outer circumference of a metal core. The stress relaxation layer is provided on the base material layer and made of material which is at least higher in hardness than the base material layer and larger in stretch than the front surface layer. The front surface layer is made of resin material and provided on the stress relaxation layer. The stress relaxation layer is made of rubber material containing self-crosslinking resin. The stress relaxation layer has a thickness in a range of from 5 to 50 &mgr;m, and stress not lower than 5 MPa at 10% stretch.

Abstract: A computer-to-plate method and apparatus is described for imaging media sleeves by employing a laser-based imaging head in conjunction with a two stage mandrel comprising an expandable arbor and an intermediate sleeve. Most of the bulk of the mandrel is contained in the expandable arbor, which may be expanded hydraulically to mechanically engage the intermediate sleeve. The media sleeve to be imaged is mounted on the intermediate sleeve by conventional means. The method and apparatus of the invention makes possible the rapid changing between different sizes of media sleeves without requiring the handling of bulky mandrels and without endangering the precision optics imaging head of the apparatus, while maintaining the mounting precision.

Abstract: In order to solve the problem, there is provided a charging device having: a roll-like charging member disposed in contact with a surface of a member to be charged and for charging the surface of the member to be charged; wherein: the charging member includes a conductive substrate, and at least an elastic layer and a surface layer applied sequentially onto a surface of the conductive substrate; and opposite end portions of the surface layer axially project beyond opposite end portions of the elastic layer respectively, while the opposite end portions of the surface layer are made to cover the elastic layer and made open.

Abstract: A printing roller system includes a hollow, cylindrical mandrel which is closed at opposite ends thereof, with an air inlet in one end and a radial bore extending through the mandrel; journal members rotatably holding the mandrel; a resilient and compressible covering layer fixedly mounted on the mandrel and including a cut-away groove in fluid communication with the radial bore; an inelastic printing sleeve removably mounted on the covering layer; and a pressurized air supply connected with the air inlet for supplying the pressurized air to an interior of the mandrel and out through the radial bore and the cut-away groove to a position between at least a portion of the sleeve and the covering layer in order to compress the covering layer and permit mounting of the sleeve on the covering layer and dismounting of the sleeve from the covering layer.

Abstract: A bridge mandrel includes an inner sleeve assembly comprising the inner laminate and an outer laminate secured on each side of an intermediate hardened foam layer. The inner laminate is of multi-ply form with inner plies of base and adhesive layers separated from outer plies of base and adhesive layers by a compressible foam layer. The adhesive layers are made from high viscosity thermoplastic adhesive material. The intermediate layer is of segmented form with a radial gap between adjacent segments. A header is mounted to each end of the inner sleeve assembly.

Abstract: The invention concerns a device for positioning a plate (3) on a roll (1), in particular a chopper or folding roll. Said device is characterized in that the roll is provided with magnetic fixing means maintaining the plate on the surface thereof, and two centring elements whereof at least one (9) is mobile and longitudinally spaced apart from the first, so as to cooperate with matching means maintaining the plate (3), the mobile centering element (9) being linked to control means (15) for displacing it along the transverse axis of the roll (1).

Abstract: A method for producing sleeves for mounting flexographic printing plates, in which a flexible layered sleeve structure (1) is formed, selected parts (7) being removed from a first (4) of its layers, namely that which is to adhere to a printing cylinder, to leave empty regions for receiving double-sided adhesive tape for fixing the sleeve to the printing cylinder.

Abstract: Printing rollers, in particular ink rollers, dampening rollers or varnishing rollers for web-fed offset printing machines and sheet-fed offset printing machines, with a rigid roller core and a roller cover with an outside layer from elastomeric or elastic plastic material are constructed that way that the roller cover is connected with the roller core detachable. In this way for inking units, dampening units and varnishing units of printing machines rollers are made available, whose roller cover is exchangeable and can be used in a one-way method.

Abstract: The present invention relates to articles, having an extended useful life, which are used in contact with high temperature molten aluminum or molten zinc baths. One aspect of the invention encompasses articles, such as bearings, bushings, couplings or rollers, used in contact with molten aluminum or molten zinc which is coated with a high density coating consisting of a metal selected from Groups Vb, VIb, or VIIb metals (preferably molybdenum or tungsten), in pure or alloyed form. These coatings generally have a thickness of from about 0.06 to about 0.30 inch. Another aspect of the present invention encompasses a roll for guiding steel strip through a high temperature aluminizing bath, which utilizes a multi-layer structure, the first primer layer being a Group Vb, VIb or VIIb metal, preferably tungsten or molybdenum (in pure or alloyed form), the second layer comprising MCrAlY in which M is either nickel or cobalt, and the third layer comprising a refractory metal oxide of Al, Zr, Si or Cr.

Abstract: A roller is structured so that one or a plurality of grooves are recessed on an outer peripheral surface of an outer race in a bearing, a part of a synthetic resin tire integrally adhered to the outer race of the bearing is inserted and welded within a groove on the outer peripheral surface of the outer race in the bearing, whereby a firmer adhesion force can be obtained. Accordingly, a more firmly adhered fitting body is prevented from being peeled off from the outer race of the bearing and the tire and the outer race of the bearing are prevented from separately racing even when the bearing is exposed to a heavy load and rotates at a high speed, that is, the roller is adhered so as to prevent the tire and the bearing from rotating relative to each other.

Abstract: A roller including an inner tubing and an outer tubing which is fixed relative to the inner tubing by fixing means which includes welding the outer tubing to the inner tubing or by providing a plurality of radially disposed and spaced apart spokes rigidly interconnecting the inner elongate tubing to the outer elongate tubing. The roller with weldments is particularly suitably for a nipped application.

Abstract: Rotatable plastic rollers are produced by either injecting between a roller shaft and an outer running roller layer a thermoplastic material which, during cooling down, shrinks toward the roller shaft and away from the outer running roller layer on account of a contraction in volume or, in the multi-component injection-molding process, by first injecting the outer running roller layer and then injecting between the latter and the roller shaft a thermoplastic material which then likewise shrinks toward the roller shaft and away from the outer running roller layer. The process produces plastic rollers comprising an inner running roller layer (2), which is bonded solidly with the roller shaft (1), and an outer running roller layer (3), which can rotate freely with respect to said inner layer by means of a sliding gap (6). The roller shaft may optionally also be sheathed with a thermoplastic elastomer. This may take place in the same process during the multi-component injection molding.

Abstract: A roll for smoothing a web and a method of making the roll. The roll includes a roll core having an outer surface, and a covering layer disposed on the outer surface of the roll core, the covering layer having an inner surface, an outer surface, and a radial thickness. The covering layer includes a resilient matrix material and fillers embedded in the resilient matrix material, wherein the fillers include a plurality of elongated particles which have a length which is less than the radial thickness of the covering layer. The process includes providing a roll core having an outer surface, and applying a covering layer on the outer surface of the roll core, the covering layer having an inner surface, an outer surface, and radial thickness, the covering layer including a resilient matrix material and fillers embedded in the resilient matrix material, wherein the fillers include a plurality of elongated particles which have a length which is less than the radial thickness of the covering layer.

Abstract: A method for forming a seamless cylindrical photosensitive element on a flexible cylindrical sleeve wherein the flexible sleeve is mounted onto a sleeve support to isolate the flexible sleeve from high temperature and/or high pressure associated with forming a cylindrical photosensitive layer on the flexible sleeve.

Abstract: A printing plate cylinder has a linear bearing press-fitted into its axial bore with the linear bearing having a ball-bearing surface for engaging a cylindrical rotatable drive shaft to permit axial and circumferential adjustments as needed.

Abstract: Disclosed is a semiconductive rubber roller used as a developing roller in a photocopying printer machine exhibiting excellent performance and outstanding durability. The rubber roller is an integral body comprising (a) a shaft of a metallic material, (b) a base rubber layer on and around the shaft formed from a semiconductive silicone rubber having a specified volume resistivity and (c) a cladding layer having a specified thickness on and around the base rubber layer formed from a synthetic resin composition compounded with a specified amount of particles of a dielectric material, such as silica, having a dielectric constant of 2.0 to 8.0 and a specified average particle diameter.

Abstract: A conformable roller for use in a fusing station of an electrostatographic machine, the fusing station being provided with a pressure roller and a fuser roller for fusing a toner image on a receiver, the fuser roller made from a plurality of layers surrounding an axis of rotation, the conformable roller including a rigid cylindrically symmetric core member; a flexible replaceable removable compliant sleeve member in the form of a tubular belt surrounding and nonadhesively intimately contacting the core member; and the fusing station including an internal heat source for the fuser roller, at least one of the plurality of layers being thermally conductive.

Abstract: An intermediate transfer member (IT) roller for use in an electrostatographic recording apparatus comprising a core member; a compliant layer covering the core member; and a stiffening layer covering the compliant layer, wherein the stiffening layer includes an endless belt that has a thickness in the range of greater than 50 and up to 1000 micrometers.

Abstract: A Method of Manufacturing a Developer Roller in which a wetting agent is added to a polymer and graphite to ensure thorough dispersion of the graphite. The developer roller's performance is further improved by spray applying a surface layer of graphite and wetting agent and burnishing this surface layer after spray application. Additional improvements are seen by using many multiple steps of spraying thin coats to improve adhesion between the spray applied coats.

Abstract: A paper-making machine includes at least one roll for carrying a fiber web or a belt. At least one of the rolls includes a shell formed from a composite material; a journal comprised of metal; and a head interposed between and interconnecting the shell and the journal. The head is also formed from a composite material.

Abstract: Heat rolls and fuser belts utilized in the fusing step of the electrophotographic process are disclosed. These belts and rollers eliminate toner offset while still maintaining excellent release characteristics of the printed page from the fuser. The heat rolls comprise a core member having coated thereon a plurality of concentric layers, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the roll exhibits electrical breakdown at about 250 volts or less. The fuser belts comprise a heat resistant resin substrate (such as a polyimide belt) carrying thereon a plurality of layers coating the outer surface of said belt, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the belt exhibits electrical breakdown at about 250 volts or less.

Abstract: Hardfacing for a sugar mill roller is disclosed including a wear resistant material supported by a mild steel matrix and applied to the outer surface of the sugar mill roller. A method of hardfacing a sugar mill roller is also disclosed wherein a mild steel weld pool is formed on the surface of the roller, a particulate wear resistant material is impinged on the weld pool, and the weld pool is allowed to solidify. A method of applying a hardfacing capping to a ridge profile of a sugar mill roller is also disclosed, wherein hardfacing composition comprising a mild steel matrix material is progressively laid up by welding and a particulate abrasion resistant material is continuously impinged thereon.

Abstract: The present invention is related to a paper conducting cylinder in a folder which is assigned to a rotary printing press such as a rotary newspaper printing press. A plurality of cylinder's surface sections (19) is mounted about the circumference of said cylinder (8). Each of said surface sections (19) being of layered structure comprises a compressible material (24) adhesively attached thereto. Said surface sections (19) are removably secured to mounting surfaces (29) of said cylinder (8), preferably on its side walls.

Abstract: A method for manufacturing a calendar roll in which a continuous band of filler material is wound onto an axle until a desired diameter for the roll is obtained, and then an elastic coating is applied to an outermost surface of the band, i.e., the outermost layer of windings. An adhesive agent may be applied onto the band such that adjacent windings of the band adhere to one another during winding of the band onto the axle. Adjacent windings of the band in an uppermost layer of windings may be welded together to provide a foundation for the elastic coating. The calender roll includes an axle, a uniform and continuous band of filler material wound onto the axle to provide the roll with a desired diameter, and an elastic polymer coating arranged on an outermost layer of windings of the band on the axle.

Abstract: In a fixing device for an image forming apparatus, a heat roller includes a hollow cylindrical base, a heating layer formed of strip-like fibers implementing desired power consumption, and a parting layer provided on the outer periphery of the heating layer with the intermediary of an electrical insulating layer. The strip-like fibers of the heating layer are wound on the base and provided with a preselected resistance.

Abstract: The present invention is directed to a pressure roll including a cylindrical core member having a center shaft, an intermediate layer surrounding the core member and formed from a flexible material, and an outermost layer surrounding the intermediate layer and formed from a high-thermal conductivity material having a thermal conductivity of not less than 0.03 cal/cm.multidot.sec.multidot..degree.C. Also disclosed is a molding apparatus for a plastic sheet using the pressure roll. According to the pressure roll and the molding apparatus using the pressure roll, when a resin extruded sheet interposed between the pressure roll and a main cooling roll is pressed onto the main cooling roll, the outermost layer of the pressure roll is elastically deformed slightly to apply a surface pressure onto the resin extruded sheet, while cooling the plastic sheet.

Abstract: A flow coating solution consisting essentially of a fluoroelastomer, a nucleophilic crosslinking agent, and an effective solvent selected from the group consisting of N-methyl 2-pyrrolidone, dimethyl formamide, and dimethyl sulfoxide, along with a fuser member containing a layer prepared from flow coating said flow coating solution.

Abstract: A multi-layer structure roller includes a tubular-shaped metal-made outer cylinder section located at the outer-most position, a tubular-shaped metal-made middle cylinder section located on the inside of the outer cylinder section, and an tubular-shaped metal-made inner cylinder section located on the inside of the middle cylinder section, in which coefficient of linear expansion of the middle cylinder section is greater than the coefficient of linear expansion of the outer cylinder section, the outer cylinder section and the middle cylinder section are coupled by using the difference in heat-expansion caused by heating both cylinder sections in the state sandwiching an elastic body between both cylinder sections to be laminated, tapers are respectively provided at the inner circumference of the middle cylinder section and the outer circumference of the inner cylinder section to fit the taper of the middle cylinder section, certainly coupled with the outer cylinder section to sandwich the elastic body by expa

Abstract: A magnetic transport system (8) has at least one magnetic transport roller (20) mounted to a frame (10) for conveying a ferromagnetic web (12). The transport roller (20) has a magnetic core (22), a first bonding layer (24) at least partially surrounding and bonded to the core (22), a first layer (26) at least partially surrounding and bonded to the first bonding layer (24), a second bonding layer (28) for bonding second layer (30) to the core (20). Second layer (30) comprises a wear and abrasion resistant material. Further, a ferromagnetic web (12) is arranged for movement along the magnetic transport roller (20) for transporting materials thereon.

Abstract: A magnetic transport system (8) has at least one magnetic transport roller (20) mounted to a frame (10) for conveying a ferromagnetic web (12). The transport roller (20) has a magnetic core (22), a first bonding layer (24) at least partially surrounding and bonded to the core (22), a first layer (26) at least partially surrounding and bonded to the first bonding layer (24), a second bonding layer 28 for bonding second layer 30 to the core (20). Second layer (30) comprises a wear and abrasion resistant material. Further, a ferromagnetic web (12) is arranged for movement along the magnetic transport roller (20) for transporting materials thereon.

Abstract: A biasable transfer system member for use in an electrographic printing apparatus for attracting electrically charged particles from an imaging substrate to the biasable transfer system member includes an electrically conductive core and an outer layer of a fluorinated carbon filled elastomer wherein the fluorinated carbon has a fluorine content of about 10 to about 30 weight percent based on the weight of fluorinated carbon.

Abstract: Used, spent or physically degraded primary charge rollers (PCR's) may be rejuvenated to an extent that is operationally comparable to (or exceeds) the print quality and service life of an OEM-supplied PCR. The used PCR is treated so as to apply an overcoating of a dispersion which includes an electrically conductive particulate material, such as graphite or carbon black, and a polymeric binder (e.g., polyurethane latex). The electrically conductive material imparts the necessary electrical properties to the PCR for purposes of "rejuvenation", while the presence of the polymeric binder serves to impart long-term service life to the PCR and also permits the use of less electrically conductive material.

Abstract: A charging roll which is held in contact with an outer circumferential surface of an image bearing medium for charging the surface of the image bearing medium by application of a DC voltage and an AC voltage which is superimposed on the DC voltage, the charging roll comprising: a center shaft; an electrically conductive base layer formed on an outer circumferential surface of the shaft; an outer structure formed on an outer circumferential surface of the conductive base layer; and the charging roll having Asker C hardness of less than 48 degrees as measured upon application of 1 kg load thereto and micro rubber hardness in a range of 65-85 degrees as measured upon application of 33.85 g load thereto.