Abstract: A grinding apparatus may include a frame and a pair of rolls each having a circumferential surface and being rotatably mounted on the frame, and a plurality of teeth located on the circumferential surface. In embodiments, at least one roll comprises a roll body structure rotatably mounted on the frame and a roll cover structure forming the circumferential surface, and the roll cover structure may be at least partially removable from the roll body structure to permit replacement of at least a portion of the circumferential surface without requiring removal of the roll body structure from the frame. In embodiments, the teeth on one roll may include an upper cap portion formed of a relatively harder material and a lower base portion formed of a relatively softer material. In embodiments, the teeth on one roll have a coating of a relatively harder material than a relatively softer base material forming the tooth.

Abstract: A particulate sizer includes an infeed for receiving a plurality of particulates, a first roller, and a second roller. The first and second rollers break down the plurality of particulates as the plurality of particulates passes through a gap between the first and second rollers. The width of the gap varies along a length of the first and second rollers. Accordingly, the first and second rollers compress some particulates to a first size and compress other particulates to a second smaller size. In addition, each of the first and second rollers has a textured outer surface for carrying the plurality of particulates through the gap.

Abstract: A rubbing apparatus including a rubbing roller including an opening portion at a region of a circumferential surface of the rubbing roller, an outlet portion connected to the opening portion and open to an outside of the rubbing roller, and a groove portion connected to the opening portion and penetrating into the rubbing roller along the opening portion; and a rubbing cloth substantially surrounding the circumferential surface of the rubbing roller.

Abstract: A calender roll, which was already in use and has a metallic core with engaged textile material sheets, can be worked for a new use. In the surface of the sheets are cut grooves, to which is subsequently applied a layer structure of synthetic resin-impregnated fibrous material forming a certain thickness over each point of the roll. Onto said layer can be applied a functional covering, for example of rubber.

Abstract: The invention relates to a method for manufacturing a roll coating onto a roll frame (1), which coating comprises a base layer (2) on the roll frame (1) and a surface layer (3) on the base layer (2). The base layer (2) is brought to its final form after the surface layer (3) has been formed and cured or solidified. The surface layer (3) is formed on the base layer (2) and cured or solidified after the base layer (2) has been formed on the roll frame (1).

Abstract: A toner release agent delivery system for a printing device utilizes a roller which has a plurality of layers of a non-woven textile web. The textile web is comprised of substantially all sub-denier fibers. The release agent delivery system with predominately sub-denier fibers has a very high release agent retention capability with a very low leak rate.

Abstract: An oil-coating roller constituted mainly of an oil-retaining layer around a central core and an oil-coating control layer surrounding the oil-retaining layer is provided which does not require a sealing treatment for prevention of oil leakage from the roller end face, and has a long service life. The oil-retaining layer is formed by winding in layers a nonwoven fabric which exhibits an oil-sucking height of not less than 60 mm and has an oil permeability of 40 g/cm2/hr.

Abstract: An oil-coating roller constituted mainly of an oil-retaining layer around a central core and an oil-coating control layer surrounding the oil-retaining layer is provided which does not require a sealing treatment for prevention of oil leakage from the roller end face, and has a long service life. The oil-retaining layer is formed by winding in layers a nonwoven fabric which exhibits an oil-sucking height of not less than 60 mm and has an oil permeability of 40 g/cm2/hr.

Abstract: The bone-hard supercalender roll of the present invention comprises: an elongate shaft having a longitudinal axis; a core layer formed of fibrous material circumferentially covering the shaft; means for compressing the core layer along the shaft longitudinal axis; an intermediate layer circumferentially covering the core layer that comprises a first polymeric resin and a heavy textile material; and an outer layer circumferentially covering the intermediate layer that comprises a second polymeric resin and a reinforcing material. In this configuration, the roll can provide the requisite bone-hard surface for calendering applications, but can do so without the surface denting and marring problems associated with filled rolls and the expense of rolls formed of covered metal cores.

Abstract: The present invention provides a fixing roller capable of satisfying releasing ability and scratch resistance all together. The fixing roller comprises a core 16, a primer layer 18 applied on the periphery of the core 18, and a fluororesin top layer 20 applied on the periphery of the primer layer 18, wherein glass particles 24 are mixed into at least one of the primer layer 18 and the top layer 20.

Abstract: A semiconductive roller forming an elastic layer on the outer circumference of a conductive shaft body, in which the elastic layer is an unfoamed body having the addition curing type liquid silicone rubber cured as a base polymer, and the ASKER C hardness of this unfoamed body is 10° to 50°. This semiconductive roller is used as a rotatable developing roller of an image forming apparatus such as a printer.

Abstract: A roll for use in the manufacture of paper and board, a press roll, in particular a center roll in a press, a backup roll for an extended-nip press roll, a hot press roll, or equivalent, which is in direct contact with a wet paper web, or a calender roll, a method for manufacturing the same and a coating composition therefor including an adhesion layer arranged on the frame part of the roll and a ceramic layer arranged on the adhesion layer. The ceramic layer has a thickness of from about 100 &mgr;m to about 2000 &mgr;m and includes from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO2, or from about 50% to about 80% by weight of Al2O3 and from about 20% to about 50% by weight of ZrO2, or exclusively Al2TiO5. The outer face of the ceramic layer is finished until the roughness Ra is from about 0.2 &mgr;m to about 2.0 &mgr;m and/or the porosity of the outer face of the roll is from about 1% to about 20%.

Abstract: A heating roller 10 comprises a surface layer 157 formed of a prepreg material including carbon fibers having a high tensile strength and a high elastic modulus, and a heating unit 153 mounted in the inner area of the surface layer and communicated to a power supply unit 30 formed of a prepreg material including carbon fibers having a high electric resistance. A metal material working as an electrode 20 communicated to the power supply unit 30 and the heating unit 153 is mounted to both ends of the heating roller 10. The electric resistance of the heating unit 153 is adjusted either by changing the thickness (number of laminated layers) of the prepreg material including carbon fibers, or by adjusting the mounting angle of the carbon fibers inside a prepreg material being laminated and the angle of the carbon fibers inside another prepreg material being laminated.

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: A paint roller having a tubular core formed of thermoplastic material. The thermoplastic material being in the form of a multiplicity of spirally wound plies. The multiplicity of plies comprising an outer ply surrounding and in continuous contact with an inner ply. The plies are in general parallelism with one another and fused to one another in the absence of adhesive. A fabric cover overlies the core and is heat fused to the underlying core in the absence of adhesive.