摘要:
A release agent donor member 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.sub.(1-6) alkyl)siloxane polymer; a polyfunctional poly(C.sub.(1-6) alkyl)arylsiloxane polymer; and combinations thereof; and a release agent.
摘要:
For fusing toner images to receiver members, a fusing station is disclosed including an externally heated deformable fuser roller, and a relatively harder pressure roller. The fuser roller includes a core member, a base cushion layer around the core member, a heat storage layer around the base cushion layer, and a thin gloss control layer around the heat storage layer, which fuser roller has an improved fusing efficiency. A ratio of thermal conductivity of the heat storage layer divided by thermal conductivity of the base cushion layer is preferably in a range of approximately between 1.5-7.
摘要:
Disclosed is a release agent donor roller, and methods and fusing systems which incorporate the donor roller, for applying a polymeric release agent to a fuser roller in an electrophotographic apparatus. The donor roller comprises a base member with a polymeric outer layer thereover comprising a silicone material with a controlled, relatively high swelling characteristic in the release agent, i.e., the layer has a swell in 300 cts poly(dimethylsiloxane) oil maintained at a temperature of 175° C. after 24 hours exposure of greater than 15% by weight. When operated in a fusing system, the donor roller exhibits relatively low toner contamination levels, even for relatively low melting polymer binder resins used in producing toners, such as polyester resins. The swell characteristic is still at an acceptable level such that the donor roller has adequate mechanical stability.
摘要:
A belt fusing apparatus for providing image gloss to a colorant image formed on a receiver member by a reproduction apparatus. The belt fusing apparatus includes a heated fuser roller, a pressure roller in nip relation with the fuser roller, and a steering roller. A fusing belt is entrained about the fuser roller and the steering roller for movement in a predetermined direction about a closed loop path. A cooling air flow is directed at the fusing belt over an area adjacent to the steering roller upstream of the steering roller. The cooling air flow, heated by the action of the air flow cooling the fusing belt, is captured and directed at the fusing belt downstream of the steering roller to preheat the fusing belt.
摘要:
Reducing variation in the surface temperature of an externally-heated fusing roller in an electrophotographic machine, the variation typically occurring during the beginning of a fusing run, by detecting the beginning of a fusing run and applying a modified fusing temperature set-point characteristic to the fusing roller. The mode of the electrophotographic machine is monitored to determine whether the machine has changed operating modes, and the application of the modified fusing temperature set-point characteristic to the fusing roller is ceased when the electrophotographic machine changes modes. The force with which the heating rollers engage the fusing roller is controlled within desired operating limits.
摘要:
A high heat transfer efficiency fusing roller includes an annular elastomeric base cushion layer around a rigid cylindrical core member, with a high thermal conductivity layer around the base cushion layer, and a thin flexible release layer around the high thermal conductivity layer. The base cushion layer is less thermally conductive than the high thermal conductivity layer, which high thermal conductivity layer has a thermal conductivity equal to or greater than 1 Btu/hr/ft/F.
摘要翻译:高传热效率定影辊包括围绕刚性圆柱形芯构件的环形弹性体基层缓冲层,围绕基层缓冲层具有高导热性层,以及围绕高导热层的薄柔性释放层。 基底缓冲层的导热性比高导热层的导热性差,导热率高,导热率等于或大于1Btu / hr / ft / F。
摘要:
A fuser assembly for an electrostatographic reproduction apparatus including a fuser member and a pressure member, a release oil oiler system for the fuser assembly, and a cleaner for cleaning the pressure member. The pressure member cleaner has a cleaning member including a fabric material. A drive mechanism is associated with the cleaning member for moving the cleaning member relative to the pressure member such that the cleaning member is located in operative association with the pressure member, or the cleaning member is located in spaced relation remote from the pressure member. A logic and control unit selectively activates the drive mechanism to move the cleaning member to the operative association location or the remote location.
摘要:
An improved apparatus for cooling or heating, or both, a fuser belt in a process for producing electrophotographic toner images on a substrate. The images are produced by passing a substrate bearing an image through a fusing zone to fuse fusible toner particles comprising the image to produce a substrate bearing a fused toner image, passing the substrate bearing the fused toner image through a cooling zone to produce a cooled substrate, which is thereafter passed to a release zone where it is released to produce the substrate bearing the toner image.
摘要:
Reducing variation in the surface temperature of an externally-heated fusing roller (42) in an electrophotographic machine, the variation typically occurring during the beginning of a fusing run, by detecting the beginning of a fusing run and applying a modified fusing temperature set-point characteristic (10) to the fusing roller (42). The mode of the electrophotographic machine is monitored to determine whether the machine has changed operating modes, and the application of the modified fusing temperature set-point characteristic to the fusing roller (42) is ceased when the electrophotographic machine changes modes. The force with which the heating rollers (46, 48) engage the fusing roller (42) is controlled within desired operating limits.
摘要:
A fuser, for a reproduction apparatus, having at least one heated fuser roller operating at a setpoint temperature to permanently fix a marking particle image to a receiver member, and a mechanism for controlling temperature droop in the at least one heated fuser roller. The temperature droop controlling mechanism includes an external heat source movable to a position in operative relation with the heated fuser roller and a nonoperative position remote from the heated fuser roller. A logic and control unit regulates heat input to the heated fuser roller, during an idle period, to raise the setpoint temperature for the heated fuser roller a preselected amount relative to the operating temperature set point. At the actuation of the reproduction apparatus job run start, the control unit regulates heat input to the heated fuser roller by the fuser roller heater and the external heat source to raise the fuser operating temperature setpoint a preselected amount relative to the idle temperature setpoint. After a preselected time, the control unit actuates a source of air pressure to direct air flow at the fuser roller for creating an intended thermal gradient in the heated fuser roller. Then at a preselected time later, the control unit enables the first receiver member of a reproduction job run to be transported into operative relation with the heated fuser roller, whereby there is substantially no temperature droop in the heated fuser roller. Further, the logic and control unit actuates the pressurized air source to maintains such air flow for a preselected time after the last receiver member in a reproduction job run has passed through the fuser, whereby overshoot of the fuser roller temperature is minimized.