摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, a supply roller formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. The toner is mixed by conveying fins which have phases that are different in such a manner that the loads are uniform in rotation
摘要:
A plurality of developing units each includes a case which accommodates toner containing pigment, a developing roller, a supply roller formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller and a conveying fin. The developing roller, supply roller, and conveying fin for each developing unit are angularly arranged in a particular manner.
摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, a supply roller having chamfered ends and formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. The side surfaces of the developing roller have a surface roughness of 0.5 .mu.m or smaller in Rmax.
摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, a supply roller formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. A conveying fin is supported by the case so as to convey toner to the surface of the supply roller wherein the developing roller, the supply roller, and the conveying fin are sequentially disposed in a horizontal direction. The number of revolutions of the conveying fin per unit time is between {fraction (1/50)} and {fraction (1/20)} of the supply roller.
摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, a supply roller formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. The toner contains a first and second additive having a specific covering ratio to the surface matrices in the toner.
摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, a supply roller having chamfered ends and formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. Also a first sealing member is disposed on the side ends faces of the developing roller and supply roller so as to prevent leakage to the outside portion of the case. Further, a second sealing member in the form of a film is pressed against a lower surface of the developing roller in order to prevent leakage of toner, wherein a quantity &dgr; of displacement of the sealing member due to its abutment against the developing roller satisfies 0.1 mm
摘要翻译:本发明的显影单元包括容纳含有颜料的调色剂的壳体,显影辊,具有倒角端的供给辊,并且由弹性构件形成,所述弹性构件被布置成以提供的方式被压靠在显影辊的表面上 调色剂到显影辊的表面。 此外,第一密封构件设置在显影辊和供给辊的侧端面上,以防止泄漏到壳体的外部。 此外,薄膜形式的第二密封构件被压靠在显影辊的下表面上,以防止调色剂的泄漏,其中密封构件由于与显影辊的抵接而的位移量的数量增加了0.1 mm <δ<0.8mm,第二密封构件的厚度t满足50μm
摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, and a supply roller formed of an elastic material arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. A sealing member is disposed on the side ends of the developing roller and supply roller so as to prevent leakage to the outside portion of the case. A blade at least longer than the developing roller restrains the quantity of toner on the developing roller. The blade has a radius of curvature between 30 .mu.m and 150 .mu.m.
摘要:
A developing unit of the present invention includes a case which accommodates toner containing pigment, a developing roller, a supply roller formed of an elastic member arranged to be pressed against a surface of the developing roller in such a manner as to supply toner to the surface of the developing roller. Moreover, the percentage of open cells in the elastic supply roller is made to be 30% or higher and depth of engagement of the supply roller to the developing roller is made to 0.4 mm or smaller. The toner has shape factors SF-1 of 150 or smaller and SF-2 of 140 or smaller.
摘要:
The present invention provides an electrophotographic image forming apparatus capable of forming a high quality image by eliminating an expansion/contraction, displacement in color or nonuniformity of color of the image formed on a transfer member. An image carrier gear for driving an image carrier is driven by a driving means gear at an image carrier driving position and transmits driving force to conveying force transmitting gear at a transfer driving position. The conveying force transmitting gear transmits conveying force to the transfer member. A time during which the image carrier moves from a latent image forming position to a transferring position is made substantially equal to a time during which the image carrier gear moves from an image carrier driving position to a transfer driving position.
摘要:
A developing system comprises: a plurality of image carriers; a plurality of developing devices for developing electrostatic latent images, formed on the plurality of image carriers, with respective liquid developers of different colors of which carrier is nonvolatile solvent; and developer collecting means which are disposed at a plurality of locations for collecting excess developers, wherein the developing devices have developer containers, respectively. The developing system further comprises a carrier storing tank for distributing the carrier to the respective developer containers.