JPS63168457U

JPS63168457U -

Info

Publication number: JPS63168457U
Application number: JP5988687U
Authority: JP
Priority date: 1987-04-22
Filing date: 1987-04-22
Publication date: 1988-11-02
Anticipated expiration: 2002-04-22
Also published as: JPH0750758Y2

Description

[Brief explanation of the drawing]

第１図〜第３図は本考案の実施例を示しており
、第１図は第一実施例に係る現像装置の断面図、
第２図は第１図の部分拡大図を示し、また第３図
は第二実施例に係る現像装置の部分拡大断面図を
示し、第４図は従来の現像装置を組込んだ複写機
の構成説明図、第５図は従来の現像装置の断面図
、第６図は従来の現像装置における供給ローラと
仕切り壁との隙間間隔Ｓと、この供給ローラの現
像剤搬送量との関係を示すグラフ図、第７図は第
５図の部分拡大断面図を示している。符号説明、１……感光ドラム、２……装置ハウ
ジング、３……開口部、４……現像ローラ、５…
…供給ローラ、７……トナーホツパー、８……押
圧シート、９……層形成部材、１６……凹溝、２
０……押圧ローラ。 1 to 3 show embodiments of the present invention, and FIG. 1 is a sectional view of a developing device according to the first embodiment;
FIG. 2 shows a partially enlarged view of FIG. 1, FIG. 3 shows a partially enlarged sectional view of a developing device according to the second embodiment, and FIG. 4 shows a copying machine incorporating a conventional developing device. FIG. 5 is a cross-sectional view of a conventional developing device, and FIG. 6 shows the relationship between the gap S between the supply roller and the partition wall in the conventional developing device and the amount of developer conveyed by the supply roller. The graph diagram, FIG. 7, shows a partially enlarged sectional view of FIG. 5. Explanation of symbols, 1... Photosensitive drum, 2... Apparatus housing, 3... Opening, 4... Developing roller, 5...
... Supply roller, 7 ... Toner hopper, 8 ... Pressing sheet, 9 ... Layer forming member, 16 ... Concave groove, 2
0...Press roller.

Claims

[Claims for Utility Model Registration] (1) A developing roller disposed opposite to the latent image carrier, and a supply disposed in contact with the outer circumferential surface of the developing roller to supply the developer in the device housing to the outer circumferential surface. a roller; and a layer forming member disposed in contact with the outer circumferential surface of the developing roller to form a uniform layer of the supplied developer on the outer circumferential surface and to triboelectrically charge the developer; In a developing device that supplies developer toward the latent image carrier through an opening provided therein, the supply roller includes a pressing means for pressing the developer in the device housing onto the outer peripheral surface of the supply roller. A developing device characterized by being provided with. (2) The developing device according to claim 1, wherein the pressing means is constituted by a pressing sheet made of a material having a different triboelectrification series from that of the layer forming member. (3) The developing device according to claim 1, wherein the pressing means is constituted by a pressing roller made of a material having a different triboelectrification series from that of the layer forming member.