摘要:
A fixing apparatus has a heater that includes a magnetic shunt alloy whose Curie temperature is set higher than a fixing temperature; an induction heater that generates an alternating magnetic field applied to the magnetic shunt alloy and performs electromagnetic-induction heating on the heater; and a body controller that controls the induction heater so as to adjust the fixing temperature in each fixing job. The body controller controls the induction heater so as to perform electromagnetic-induction heating on the heater, during a period between fixing jobs. The body controller thereby reduces a temperature difference generated on the heater between portions corresponding to paper feeding and non-paper feeding areas in a previously executed fixing job.
摘要:
A fixing apparatus can prevent an excessive rise in temperature of a paper non-passage area due to diverted flow of magnetic flux from a paper passage area of a heat-producing element to a paper non-passage area thereof has a small configuration. A center core is rotated by a rotation section, bringing cutaway parts to a magnetic path masking position, and the degree of magnetic coupling between the center core and a heat-producing roller is weakened, suppressing an excessive rise in temperature of paper non-passage areas of the heat-producing roller. With this fixing apparatus, switching of the intensity of magnetic coupling between the center core and heat-producing roller can be performed simply by rotating the center core. Also, with this fixing apparatus, it is not necessary for magnetism suppressing elements to be provided as separate members, enabling the configuration to be made simpler and less expensive.
摘要:
A fixing apparatus can prevent an excessive rise in temperature of a paper non-passage area due to diverted flow of magnetic flux from a paper passage area of a heat-producing element to a paper non-passage area thereof has a small configuration, A center core is rotated by a rotation section, bringing cutaway parts to a magnetic path masking position, and the degree of magnetic coupling between the center core and a heat-producing roller is weakened, suppressing an excessive rise in temperature of paper non-passage areas of the heat-producing roller. With this fixing apparatus, switching of the intensity of magnetic coupling between the center core and heat-producing roller can be performed simply by rotating the center core. Also, with this fixing apparatus, it is not necessary for magnetism suppressing elements to be provided as separate members, enabling the configuration to be made simpler and less expensive.
摘要:
The present invention holds the source document feeding direction downstream edge of a printed sheet ejected above a source document feed tray by means of a top ejection platform functioning as a printed sheet holding section in an area apart from source document feed rollers functioning as a source document feeding section. As a result, a printed sheet ejected onto top ejection platform is not fed automatically by source document feed rollers. Therefore, a printed sheet that has undergone image formation can be ejected without obstruction above source document feed tray of an automatic document feeder, checking and removal of a printed sheet are facilitated, and convenience is improved.
摘要:
An image forming apparatus with three-dimensional object imaging capability is provided that is compact, has a small footprint, and is easy to use. This apparatus has a top-surface paper ejection unit (130) that ejects paper P on which an image has been formed by an image forming unit (110) onto the top surface of the apparatus body (101); a top-surface paper ejection tray (150) that can be opened and closed with respect to the apparatus body (101) and receives paper P ejected by the top-surface paper ejection unit (130); an object placement platform (160) whose object placement surface (161), on which an object is placed, is exposed by opening the top-surface paper ejection tray (150); and a two-dimensional sensor (170) for imaging an object placed on the object placement platform (160). The apparatus has a configuration in which the top-surface paper ejection tray (150), when open, serves as a support for the imaging section. In this image forming apparatus (100), the top-surface paper ejection tray (150) also functions as a support for the two-dimensional sensor (170).
摘要:
In a fixing apparatus using an induction heating type of heating apparatus, there are provided an excitation apparatus that generates magnetic flux, an opposed core located opposite the excitation apparatus, a fixing belt that is induction-heated by the aforementioned magnetic flux, and magnetism masking elements that block magnetic paths corresponding to paper non-passage areas of fixing belt between the excitation apparatus and the opposed core. By blocking magnetic paths between the excitation apparatus and the opposed core by the magnetism masking elements, magnetic flux that induction-heats the fixing belt is effectively masked, and an excessive rise in temperature of paper non-passage areas of fixing belt is prevented.
摘要:
The present invention holds the source document feeding direction downstream edge of a printed sheet ejected above a source document feed tray by means of a top ejection platform functioning as a printed sheet holding section in an area apart from source document feed rollers functioning as a source document feeding section. As a result, a printed sheet ejected onto top ejection platform is not fed automatically by source document feed rollers. Therefore, a printed sheet that has undergone image formation can be ejected without obstruction above source document feed tray of an automatic document feeder, checking and removal of a printed sheet are facilitated, and convenience is improved.
摘要:
A fixing unit is provided with a fixing belt that heats recording paper that bears and moves a toner image, an exciting coil that generates magnetic flux in the fixing belt and causes the fixing belt to produce heat by electromagnetic induction, and a heat production adjustment section that adjusts the calorific value distribution of the fixing belt by adjusting the magnetic flux acting upon the fixing belt.
摘要:
An oil application roller capable of preventing an oil leak when the roller is left in the state where the rotation axis thereof runs vertically and also capable of preventing an oil escape from the roller in a fixing device. The oil application roller (15) includes a seal ring (25) at respective end portions of the roller (15). The seal ring (25) includes a vent hole (26) extending from an end face of the roller (15) to the outside of the seal ring (25), and the cross-sectional area of the vent hole is not less than 0.01 mm2 and not more than 1 mm2.
摘要翻译:一种油涂布辊,其能够在辊的旋转轴垂直延伸的状态下防止油泄漏,并且还能够防止定影装置中的油从油中逸出。 涂油辊(15)在辊(15)的各个端部处包括密封环(25)。 所述密封环(25)包括从所述辊(15)的端面向所述密封环(25)的外侧延伸的通气孔(26),所述通气孔的截面积为0.01以上 mm 2且不大于1mm 2。
摘要:
With a small and simple constitution, a three-dimensional subject and a sheet document can be imaged. There are provided an image forming unit (110) for forming an image, an top face sheet ejecting unit (130) for ejecting a paper sheet (P) onto the top face of the device body (101), a top face ejected sheet tray (150) capable of receiving an ejected paper sheet (P) and openable/closable with respect to the device body (101), a platen glass (160) on which a subject is placed, a two-dimensional sensor (170) provided to the top face ejected sheet tray (150) to image the subject placed on the platen glass (160), and a manual feed unit (210) for transporting sheet originals (S) one by one and passing an original through an original information read section. The two-dimensional sensor (170) is so provided that the image of the sheet original appearing in the original information read section is formed on the partial area of the imaging area (170a).