摘要:
A recording medium having a toner image formed thereon is moved to pass through a press contact portion between an endless belt being heated and an pressure roller pressed against the endless belt. When passing through the press contact portion, the toner image is fused and permanently affixed onto the recording medium. An oil application width O of an oil application roller is shorter than belt width B of the endless belt, and a maximum passing width P of a recording medium that may be supplied for the image formation, but is longer than a maximum image-forming width I within which an image may be formed on the recording medium.
摘要:
A release agent (L) is taken by an applicator (V) to the surface of a fixing roller (F). The release agent is fed to the applicator (V) through contact with a wick (D). The wick (D) dips into a groove (UBR) in which release agent (L) is uniformly distributed over the entire width of the fixing roller (F). A release agent metering pipe (R) having apertures (O) over its length conveys the release agent (L) to the wick (D) and the groove (UBR). Release agent is always supplied over the entire effective width of the fixing roller (F) regardless of the width of the substrate currently being treated.
摘要:
A fixing apparatus comprises: a heat roller (50) having a heat source (51) therein; and first and second pressing rollers (60, 70) arranged to sequentially be pressed against the heat roller (50) beginning with a more upstream pressing roller in a direction of rotations of the heat roller (50), wherein the hardness of the heat roller (50) is Hh, the hardness of the first pressing roller (60) is Hpl and the ratio of the hardness of the two rollers (60, 70) satisfies Hr1 = Hh/Hp1, the heat roller (50) and the first pressing roller (60) are structured in such a manner that the following condition is satisfied: Hr1 ≥ 1.5.
摘要:
An oil application apparatus comprising a porous oil-holding member, a heat-resisting fiber felt, and an oil application amount control layer. The porous oil-holding member is impregnated with silicone oil. The heat-resisting fiber felt has a bending resistance in the range of 30 to 90 mm and is provided on an oil application side of the porous oil-holding member. The oil application amount control layer is provided on the oil application side of the heat-resisting fiber felt.
摘要:
An oil application roller (136) has a core shaft (12) and an oil retention/supply layer (14) formed to cover the outer peripheral surface of the core shaft (12). The oil retention/supply layer (14) includes a porous elastic material which exhibits no substantial swelling against an offset-preventing oil used, and is impregnated with a mixture containing an offset-preventing oil and a curable oil-retention material. The curable oil-retention material is cured. The oil application roller (136) is for use in a fixing unit (112) of an electrophotographic image-forming apparatus.
摘要:
A release agent donor member (50) for a toner fixing system, the donor member contains, in order: a base member; an optional intermediate layer; an outermost layer comprising a polymeric composition containing a cured interpenetrating network of fluorocarbon elastomer and one or more silicone resins selected from a polyfunctional poly(C (1-6) alkyl)siloxane polymer; a polyfunctional poly(C (1-6) alkyl)arylsiloxane polymer; and combinations thereof; and a release agent (33) whereby interchange of siloxane oil with the siloxane in the silicone rubber network is reduced and excessive swelling of the donor member prevented.
摘要:
An improved release agent delivery apparatus (10) is disclosed for use in laser printers, plain paper copiers, facsimile machines, and similar printing apparatus. The delivery apparatus (10) comprises an absorbent textile core (24) filled with release agent, a permeable membrane (12) surrounding the textile core to form a sheathed wick member, and a mounting sleeve (14) adapted to attach the sheathed wick member in operative contact with the printer. The apparatus has numerous operational advantages over existing oil delivery apparatus, including providing multiple contact surfaces for longer operational life before replacement, ease in cleaning and regeneration, improved durability and reduced wear, and more compact and versatile operation.
摘要:
A release agent composition for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax random copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
摘要:
In the fixing device with no oil leakage and a stable oil applying performance, the paper with a pre-fixed toner image is transmitted through the pressurized contact portion between a fixing roller (51) and a pressurizing roller (52). An oil applying roller (61) applied a silicon oil (71) to the fixing roller (51). An oil applying felt (62) with one end submerged to an oil tank contacts the oil applying roller (61). Further, in the outer side of the oil applying felt (62) is mounted an oil collecting felt (63), which transmits extra oil wiped away by an equalizing member (68) to the oil tank (69). The oil applying felt (62) and the oil collecting felt (63) is held by a felt holding plate (65), and is pressed towards the oil applying roller (61) by a pressurizing spring (67).