Abstract: A distributor roll for use in a headbox of a paper-making machine, includes at least two support plates, with each said support plate having a circumferential edge. A plurality of square elongate members connect between the circumferential edges of the support plates. The support plates have at least one opening therein, whereby fluid pressure differentials on opposite sides of the support plates are equalized.

Abstract: A fixing apparatus for fixing image on a recording sheet or film comprises a fixing roller having a surface comprising a fluororesin and contacting with a toner, a heating means for heating said fixing roller, a rotating pressing roller urged against said fixing roller, and means for applying a releasing agent to the surface of said fixing roller, characterized in that said releasing agent comprises a fluorosilicone represented by the following formula (I): ##STR1## wherein a, b, c, d, e and f independently denote an integer of 0 to 3, l and m are an integer of 0 to 3 with a proviso that 1.ltoreq.1+m.ltoreq.6, and n is an integer of 1 or more.

Abstract: An ink jet printer has multiple print heads for ejecting ink in response to signals supplied in sequence to cause ejection of ink in forming an image. The ink is ejected upon an ink transfer medium, and an energy source is adapted for application of heat to the surface of the ink transfer medium. A pressure application assembly places the printing substrate in contact with the ink transfer medium in forming an image by transfer of ink. Ejection of ink may occur from multiple ink jet print heads simultaneously.

Abstract: The present invention provides a fuser member having a substrate and an outermost layer of a fluorinated diamond like carbon wherein the fluorine content of the surface of said layer is between about 20 and 65 atomic percent based on the total amount of fluorine, carbon and oxygen in said surface. The fuser member is characterized in that the outermost layer provides for excellent release of the toner.

Abstract: The invention overcomes the problem of paper edge overdrying during the paper drying process on paper machine drying cylinders. It comprises applying a thin ceramic coating onto the circumferential exterior surface of the cylinder near the cylinder edges, thereby forming a thermal barrier coating which decreases paper drying rate at said edges and reduces or eliminates paper edge overdrying.

Abstract: A godet for heating and advancing yarns which includes a stationary support member and a rotatable member which includes a heatable godet jacket. The temperature of the godet jacket is measured by means of temperature sensors, the output signals of which are transmitted by induction from the rotatable member to the stationary member. The godet is provided with an electronic memory, which is connected with the temperature sensors and stores the data supplied by the temperature sensors. The memory is connectible to a data transmission unit, and the data are transmitted by induction between a stationary primary coil and a rotating secondary coil, which also provides the supply of voltage to the rotating member. In this conjunction, it is possible to transmit the data both from the rotating member to the stationary member of the godet and from the stationary member to the rotating member.

Abstract: A heating roller for web-like materials, in particular paper has a cylindrical roller body with at least one flange journal. At least one feed line and/or discharge line for a heating medium, in particular steam, are provided. Several, at least, approximately axially aligned and, preferably, disposed peripherally, lines and/or bores pass the heating medium through the roller body. At least one collecting chamber is formed within the heating roller.

Abstract: A heat fixing roller in an electrophotographic recording system provides a high degree of radiating efficiency and reduces the amount of time it takes for the heat fixing roller to achieve a temperature necessary to perform a printing operation. The heat fixing roller has a heat lamp installed along a center axis within an interior portion of the heat fixing roller. A plurality of hollowed-out heat conduits extend outwardly in a radial manner from the heat lamp to provide a path through which heat generated by the heat lamp can radiate to rapidly increase the temperature of an outer surface of the heat fixing roller.

Abstract: A calender for webs of paper includes a hard roller having a smooth outer surface. A soft roller is disposed adjacent to the hard roller and forms a roll gap therebetween. The soft roller has a coating made of flexible plastic. The coating includes an inner layer and an outer layer. The inner layer is made of a first plastic material and the outer layer is made of a second plastic material. The outer layer has lesser flexibility and greater hardness than the inner layer. The outer layer has an outer surface having wear properties such that under normal operating conditions the average roughness R.sub.a does not exceed 0.5 .mu.m.

Abstract: The invention relates to a steam-heated roll and a roll body having a central bore and peripheral axially parallel drilled passages for guiding the steam, and having at least one bolted-on flange pin with a central bore and connecting passages between the central bore of the flange pin and the ports of the peripheral drilled passages of the roll body at the flange pin, which is characterized by the connecting passages branching from the central bore of the flange pin in the flange pin to a plurality of ports of the peripheral drilled passages.

Abstract: The roll comprises a rotatable arbor (1) with an annular sleeve (7) shrunk onto it. There are internal passages (25) in the sleeve for the flow of liquid coolant there along. The internal passages are in communication with ducts (19, 21) in the arbor and the liquid coolant passed along the passages from the ducts forms a thermal barrier in the sleeve between the outer periphery and the interface.

Abstract: A composite gudgeon or endcap for a heated roller is provided which comprises a metal portion and a polymer portion. The gudgeon substantially reduces heat loss through the end of the roller and is of sufficient strength to support and transmit rotation to the roller.

Abstract: A method of forming a drum assembly for use as a rotatable endless surface onto which a toner image is formed. The drum assembly has a hollow drum with an opening at each end and a surface onto which the image is formed. A support flange, having an aperture in the center thereof, is cooled before being inserted into each end opening. The drum assembly also includes a shaft having a collar fixed in the vicinity of each end. After the shaft is positioned inside the drum, the collars are positioned to coincide with the flange apertures. Screws secure each collar to its respective flange. The screws can be adjusted to reduce the eccentricity of the drum.

Abstract: To provide a hot roller type thermal fixation device, incorporated in an electrostatic recording apparatus, particularly suitable for the thermal fixation of a multicolor toner image, said apparatus comprising a plurality of electrostatic recording units arranged in series with each other, wherein the surface smoothness of a fixed toner image is maintained at a favorable level for a long period by providing an anti-abrasive treatment onto an elastomeric covering of the heating roller. An elastomeric covering (32b) is applied on the surface of a heating roller (32) of a hot roller type thermal fixation device (22), and an anti-abrasive covering (32c) is further applied on the elastomeric covering.

Abstract: Rubber charge roller cores are coated with styrene acrylic powder. Excess powder is removed, and the rollers are used in normal operation without the usual permanent outer layer. The more complex and costly outer layer of nylon is eliminated. Dust resulting from normal operation replaces the original powder coating.

Abstract: A thermal conductive roller for use in copying machines, steam-heated and induction-heated applications includes a ceramic heating layer formed by plasma spraying a ceramic material to form an electrically conductive heating layer of preselected and and controlled resistance. Several methods of controlling the resistance of the ceramic heating layer are disclosed. The ceramic heating layer is sealed with a solid, low viscosity sealer such as Carnauba wax to protect the ceramic layer from moisture penetration. Electrical current is applied at or near the core and is conducted radially outward through the heating layer to an outer grounded metallic layer. An outer contact layer of metal, ceramic, or polymeric material can be added.

Abstract: An electrostatic assist roller (30) for use in a coating, printing or copying machine includes a cylindrical roller core (35), and a ceramic layer (38) formed by plasma spraying a blend of an insulating ceramic material and a semiconductive ceramic material in a ratio which is selected to control the resistance and thickness of the ceramic layer in response to an applied voltage differential. The semiconductive ceramic layer (38) is sealed with a solid, low viscosity sealer (39), such as Carnauba wax, to protect the ceramic layer (38) from moisture penetration. A second ceramic layer (37) may be used to insulate the semiconductive ceramic layer (38) from the core (35).

Abstract: An improved caster roll core and shell assembly are manufactured wherein two overlays of stainless steel of different hardness are deposited on the surface of the roll core, thus prolonging the life of the roll.

Abstract: A heatable roll (2) for calendering, smoothing and similar systems and a method for operating the roll incorporating an inductively operating external heating system (9) and an internal heating system (13). The internal heating system is limited to the end sections of the roll. On reaching a preset temperature level at the roll ends, the heat output of the internal system can be reduced or preferably switched off. As a result, the heating-up period of the roll is shortened, the design of the roll is kept simple, and thermal stressing of the roll is reduced.

Abstract: A processing roll adapted to engage paper or the like to heat and/or shape the same. The roll has a cylindrical side wall and defines a interior condensing chamber for steam. The interior surface of the roll is formed with longitudinal grooves which slope away from the longitudinal axis toward a central location. The steam condensates in the chamber, collects in the grooves, and flows toward a center location where the condensate is siphoned out and removed from the chamber. Improved heat transfer is achieved, and greater uniformity of heat is accomplished at the outside surface.

Abstract: The present invention relates to a rolling roller. A conventional rolling roller has had problems that a phenomenon is produced in which a rolling ring is slipped from a shaft upon rolling, and excessive axial pressure is produced upon fixing the rolling ring to the shaft by utilizing an adjusting screw whereby a unreasonable tensile force is applied and therefore a fatigue and damage of the shaft is increased fast. However, the present invention is made such that a large torque can be obtained without slipping operation by coupling a first and second spacers 23,24 and a rolling rings 20,25 which are formed with a projected slant surface a and an inclined groove b, and a unreasonable tensile force is not applied to the shaft due to that so that a fatigue and damage of the shaft can be prevented.

Abstract: An induction heating roller apparatus comprises a rotatable hollow cylindrical roller body made of magnetic material, a pair of end frames for closing the opposite opening ends of the roller body, having roller driving shafts in outer sleeve form, magnetic flux generating device comprising an induction coil wound on an iron core body positioned between the pair of end frames and in the hollow portion of the roller body, a pair of sleeve-like rods projecting from the opposite end surfaces of the iron core body and inserted for relative rotation into the outer sleeve of the shafts, and a pair of auxiliary magnetic flux generating mechanism comprising auxiliary induction coils wound on annular iron cores positioned inside the end frames and fixed at the base portion at which the sleeve-like rods are connected to the iron core body, and wherein the end frames comprise fitting edges fitted in the opposite openings in the roller body, flange portions continuous with the fitting edges and adapted to be applied to th

Abstract: The invention relates to a method for heating a roll and a heatable roll for use in a paper machine, paper finishing machine, or equivalent. The roll is heated by a heating medium which is introduced into the roll interior through at least one of the ends of the roll. The heating medium acts upon the material of the roll mantle or the roll and is arranged to flow across the axial length of the roll. The heating medium is arranged to flow out of the roll through either one of the ends of the roll. The roll is provided with means by which the coefficient of heat transfer from the flowing heating medium to the material of the roll is increased in the flow direction of the heating medium.

Abstract: In a lithographic printing press for printing on material in sheet or web form, a plate cylinder has a printing form mounted thereon. A gapless blanket cylinder is engageable with the plate cylinder and a tubular, removable blanket having a continuous surface is mounted on the blanket cylinder. Mechanisms to expand a cylindrical sleeve are provided as well as mechanisms to reduce cylinder distortion during rotation.

Abstract: A stationary syphon system for heat exchanger rolls, particularly suited for use with steam heated rolls wherein condensate must be removed from the roll chamber, utilizing a pivoted pick-up conduit mounted upon a journal conduit which is rigidly supported against radial deflection by a bearing interposed between the journal conduit inner end and the roll structure. The bearing may be mounted within a tube insertable into the journal bore to facilitate maintenance and replacement, and the condensate receiving end of the pick-up conduit is very accurately positioned with respect to the roll chamber inner surface by a positive locking arrangement remotely operated at the journal outer end.

Abstract: In a fixing device, a core material of a fixing rotating member has two largest-diameter portions respectively located between a central portion and each end portion of the fixing rotating member, within a region where a recording material of a largest size passes, and the diameter of each core material is gradually reduced from the largest-diameter portion toward the central portion and toward the nearest end portion. The outer shape of the fixing rotating member conforms to the shape of the core material. According to this configuration, it is possible to prevent corrugation and curl of the recording material, and to provide excellent mountability of the recording material.

Abstract: A godet for guiding and heating an advancing yarn, which includes a shaft mounted for rotation about its axis, and a casing coaxially and releasably mounted to the shaft. An induction coil heating system is fixedly mounted between the shaft and the outer wall of the casing, and the heating system includes a tubular core having a plurality of induction coils mounted thereon. A plurality of annular ribs are positioned on the core and on the inside of the outer wall of the casing for providing an advantageous magnetic flux path between a core and casing.

Abstract: A thermal conductive roller for use in copying machines, steam-heated and induction-heated applications includes a ceramic heating layer formed by plasma spraying a ceramic material. Conductive bands are provided for supplying electrical current to portions of the ceramic heating layer. In one embodiment, heat is generated by passing current through a length of the roller between two narrow bands. In a second embodiment, heat is generated by directing current radially from the core of the roller to an outer ground layer through wide bands corresponding to heating zones for the roller. In a third embodiment, the ceramic layer is inside the steel core.

Abstract: An apparatus for bonding a tear tape (10) to a web of material is disclosed. In the packaging art, tear tapes (10) are attached to webs of film in order to create a tear-open aid in packs made of film or with the aid of the film. The tear tape (10) is bonded to the web of material (11) by the application of heat and pressure while the web of material (11) is conveyed with the tear tape (10) over a deflecting roller or sealing roller (12). The sealing roller (12) forms a heating ring (17) which is heated for the transfer of heat and pressure to the web of material (11), but which is thermally insulated from the remaining part of the sealing roller. The sealing roller (12) is formed from several parts. In particular, it is formed from two part rollers (15, 16) and the heating ring (17) which is located between these part rollers with gaps (38, 39).

Abstract: A fuser member comprised of a substrate, thereover a silicone rubber containing a filler component therein, and wherein said filler component is reacted with a silicone hydride release oil.

Abstract: A heated calender roll at a predetermined operating temperature has a roll body having a cylindrical outer surface centered on an axis and formed radially inward from the surface with at least one axially extending passage, a pair of hub elements axially flanking and joined to the roll body, and at least one electrical heating element in the passage. A mass of heat-conducting metal in the passage has an outer surface bonded to but distinct from the roll body and an inner surface bonded to but distinct from the heating element. The metal has a melting point in excess of the operating temperature of the roll. The calender roll can be formed with a plurality of such passages each receiving a respective such electrical heating element and a respective mass of the heat-conducting metal. Alternately it can be formed with a single such passage receiving a plurality of such electrical heating elements and the mass of the heat-conducting metal.

Abstract: An induction heating winding structure 5 is installed inside a hollow roller 1, which is closed at its opposite ends by flanges 2A, 2B. Driving shafts 4A, 4B integral with the flanges having coaxial holes are rotatably supported. The induction heating winding structure 5 is supported at its opposite side by support rods 9A, 9B. The support rods are in the coaxial holes 10A, 10B of the driving shafts through bearings. The roller 1 and flanges 2A, 2B are fastened together through taper fit. When it is desired to release the roller 1 from the flanges, the driving shafts and the support rods are temporarily fastened and one driving shaft 4B is supported in a cantilever manner. The roller 1 is mounted on a transport mechanism for mounting and dismounting.

Abstract: The end portions of a rotary shell forming part of a calendar roll can be heated or cooled by a suitable (gaseous or hydraulic) fluid which is admitted into axially parallel first channels of the shell. Such channels can extend from end face to end face of the shell or only in the region of one end face each. The first channels receive the fluid from second channels which extend radially inwardly to the internal surface of the shell, and spent fluid is admitted into third channels which extend from the respective first channels to the internal surface of the shell. The first channels accommodate axially adjustable throttles which are used to regulate the rate of fluid flow in the shell and to thus regulate the temperature of the respective end portions of the shell.

Abstract: An insertless perforated mill roll body adapted to be detachably sleeved upon a roller shaft for the grinding of a fluid-containing material such as sugar cane and extracting fluid such as sucrose juice therefrom. The insertless perforated mill roll body includes a plurality of shish-ke-bab-like fluid channel strings to be encased in the roll body, each fluid channel string including a hollow fluid channel preferably defined by a channel wall member which generally extends between the two axial ends of the roll body with a plurality of fluid passage members affixed thereto. The roll body is formed by casting a castable material such as cast iron or steel to enclose the fluid channel strings, whereupon a hollow center bore is provided to receive the shaft therethrough. Each fluid passage member contains at least one generally radially extending fluid passage to allow communication between the outer periphery of the mill roll body and the fluid channel.

Abstract: A thermally regulatable calender roll, e.g. for drying paper webs, can have a roll body centered on a pair of flanged stub shafts whose flange on at least one end of the roll body can be provided with at least one annular groove or chamber communicating with the heating bores of the roll body. The pitch circle of the heating bores is located outwardly of the pitch circle of the bolts attaching the flanges to the roll body and the heating medium is fed through at least one of the stub shafts to the annular groove and the bores.

Abstract: An improved idler roll is disclosed including a longitudinal cylinder having tubular walls sealed at the ends by flanged stub shafts. The interior of the idler roll is filled with ethylene glycol. The idler roll can be placed into rolling abutment with a heated surface, and when the idler roll is stopped for a period of time, the thermal distortion along the longitudinal length of the idler roll is minimal. When the idler roll is once again started, the fluid in the idler roll causes a forced convection heat transfer, evenly distributing the temperature of the idler roll, and thereby eliminating the thermal distortion.

Abstract: A roll fuser assembly including a fuser roll and a pressure roll. The rolls are crowned and are supported in pressure engagement with each other to form a fusing nip. The pressure engagement of the rolls eliminate nonuniform nip loading in wide fusers as well as providing uniform velocity through the fuser roll/pressure roll nip. It is preferred that the crowned profile of one of the rolls be substantially to the center of the roll and that the other be offset therefrom. It is further preferred that the diameters of each of the rolls be substantially the same at each end.

Abstract: In an upsetting press for reducing the width of rolling stock, particularly for reducing the slab width in hot-rolled wide strip roughing mills with tool carriers, which are disposed on either side of the slab edge and accommodate pressing tools, in order to improve the pressing process, the upsetting press has, in the region between the pressing tools, at least one height-adjustable retaining roll above and at least one below the slab, that driver rolls are disposed in the inlet and outlet regions of the upsetting press above and below the slab and the retaining rolls and driver rolls are provided with internal cooling.

Abstract: A heat transfer roll has first and second disc-shaped outer end sections each having a centrally located tubular shaft. An inner tubular body is fitted over the two outer end sections, and a plurality of spiral ribs extend from the first end to the second end around the inner tubular body, and an outer tubular shell is fitted over the spiral ribs to form a plurality of spiral channels. Each of the end sections have one or more passageways therein which are in communication with the bore through the tubular shaft and the spiral channels. One of the outer end sections is adapted to receive a plurality of removable plugs, such that each removable plug when inserted will block the flow of liquid to one of the spiral channels. To clean such a heat transfer roll, all but one channel may be closed such that the remaining open channel may be cleaned.

Abstract: An internally cooled cylindrical roller for use in continuously casting strands of partially or wholly solidified metal is formed with a plurality of longitudinally extending coolant-conveying bores which extend over the entire length of the roller. An annular manifold in the form of an end cap is secured within a recess formed in each end face of the roller and includes a plurality of discrete pathways each of which places the open ends of two longitudinally extending bores in communication one with another and at least one additional pathway positioned to place the open end of one bore in communication with a coolant inlet or coolant outlet passageway of the roller.

Abstract: A roll, specifically a paper machine press roll, with a hollow rotatable roll body features a roll shell and on at least one of its two ends a hollow roll journal. A guide body which is stationary or fastened to the roll body extends through the interior of the roll body and forms with the roll shell a channel system through which a tempering medium flows. For purposes of using air as tempering medium, a pressure blower and/or a suction blower are connected to the channel system. The channel system and the blower(s) are so dimensioned that an air flow velocity above 10 m/sec will materialize in the channel system.

Abstract: The present invention relates to rolling practice. The proposed roll comprises a sleeve with a hard-alloy insert having a working surface and an element for protection of the insert against electrochemical wear. The element comprises an inductor coil located on the sleeve, and a magnet fixed stationary nearby the coil. Parts of turns of the coil located on the side of its outer surface are electrically connected to the hard-alloy insert, and parts of turns of the coil located on the side of its inner surface are adapted to be in electric contact with the coolant fluid.

Abstract: A long godet having a shell mounted for rotation in a cantilevered arrangement and a shaft extending substantially coaxially within the shell for supporting an induction heater coil, forward and rearward portions of the shell being respectively journalled for rotation on forward and rearward portions of the shaft, the rear portion of the shaft being secured against rotational movement but free to move radially in at least one direction, whereby load induced deflections of the shell induce similar deflections in the shaft to maintain the radial spacing between the shell and the shaft mounted heating coil.

Abstract: The invention concerns a method and apparatus for regulating the temperature of an adjustable-crown roll. The roll mantle (12) arranged to revolve on the stationary axle (11) of the roll (10) is loaded by passing a pressure medium into a pressure chamber (15) or series of chambers formed between the axle (11) and the mantle (12) so as to correct the deflection of the roll mantle (12). The roll (10) is additionally heated/cooled by passing heating/cooling fluid into the roll (10). The heating/cooling fluid used for the regulation of the temperature of the roll (10) is introduced into the roll (10) so as to be substantially uniformly distributed over the surface area of the roll (10) such that heat is removed or produced in the radial direction of the roll.

Abstract: In the plastic foil-producing apparatus where a fluent plastic mass is cooled in a roll nip between a roller member and a counter roller to a defined predetermined solidification temperature, the roller member includes a non-rotatable support member and a rotatable roller shell supported at the non-rotatable support member by one or more support elements. The roller shell includes a plurality of coaxial zones, namely, an inner soft rubber zone and a thin outer metallic zone possessing good thermal conductivity, for example, formed of copper or silver or alloys thereof, the outer surface of which is mirror smooth, for instance, chromium plated. The roller surface is cooled by cooling gas nozzles regulated by a temperature sensor, so that the temperature of the roller member in the roll nip assumes an exactly defined temperature.

Abstract: A duplex fusing system has a pressure roller which includes a compliant surface which evenly distributes contact pressures to reduce displacement of a previously fused image. The compliant layer conforms to the surface of a substrate sheet and toner on that surface, thereby ensuring that the toner does not migrate when the toner is reheated to a liquid state.

Abstract: A printing assembly comprises a counter-pressure cylinder (11) and an inking unit (17). The counter-pressure cylinder (11) or the inking unit (17) and/or the substrate (10) are divided axially into a plurality of thermal zones (Z1, Z2 . . . Zn) that may be independently heated or cooled so as to change the viscosity of the ink in this zone. Thereby, the amount of ink may be thermally influenced over the width of printing. The control of the ink amount may be effected in the axial direction during the printing operation without any changes in the mechanism of the machine.

Abstract: The invention relates to an iron sponge briquetting press having two opposite rollers. The rollers consist of a roller base body and a coating affixed thereto, in which the moulding recesses for shaping the briquettes are formed. In order to provide less expensive roller coatings as compared with the segments used formerly as coating, which have moreover longer service lives, the invention provides that the coating is produced as a closed ring from a chromium nickel molybdenum steel and is held in press fit on the roller base body. Open grooves are produced in the sleeve surface of the roller base body or on the inner side of the ring as cooling ducts, their open sides being covered by the inner side of the ring or the sleeve surface of the base body in the assembled condition of the rollers.

Abstract: A roll, specifically a paper machine press roll, with a hollow rotatable roll body features a roll shell and on at least one of its two ends a hollow roll journal. A guide body which is stationary or fastened to the roll body extends through the interior of the roll body and forms with the roll shell a channel system through which a tempering medium flows. For purposes of using air as tempering medium, a pressure blower and/or a suction blower are connected to the channel system. The channel system and the blower(s) are so dimensioned that an air flow velocity above 10 m/sec will materialize in the channel system.

Abstract: A roll for use in a calender or a like machine has a carrier which is surrounded by a flexible cylindrical shell. One or more hydrostatic displacing units are installed between the carrier and the shell to deform, when necessary, one or more selected portions of the shell. Each displacing unit has a bearing element with an external surface which is closely adjacent the internal surface of the shell and has one or more pockets for reception of a heated pressurized hydraulic fluid. Each bearing element has a second surface which faces away from the external surface, and the respective displacing unit further comprises one or more plenum chambers adjacent the second surface of the bearing element. The pocket or pockets of the bearing element receive heated fluid from a first source, and the plenum chamber or chambers of the bearing element receive compressed oil or another hydraulic fluid from a second source which can include one or more parts of the first source or vice versa.