摘要:
An electrophotographic image forming apparatus onto which a process cartridge is detachably mountable, for forming an image on a recording medium, has (a) a mounting member for detachably mounting a process cartridge having an electrophotographic photosensitive member, a charging member for charging the electrophotographic photosensitive member, a cartridge charge bias contact for receiving a charging bias to be impressed on the charging member from the main body of the apparatus when the process cartridge is mounted on the main body of the apparatus, and a cartridge-earth contact for connecting the electrophotographic photosensitive member to ground with the main body of the apparatus when the process cartridge is mounted on the main body of the apparatus, (b) a main-body-charge bias contact to be electrically connected to the cartridge-charge-bias contact when the process cartridge is mounted on the mounting member, (c) a main-body earth contact to be electrically connected to the cartridge-earth contact when the process cartridge is mounted on the mounting member, (d) a detecting member for detecting that the process cartridge is not mounted in a cartridge-mounting position by detecting that at least one of the cartridge-charge-bias contact and the cartridge-earth contact is not electrically connected to a corresponding one of the main-body-charge bias contact and the main-body earth contact and (e) a conveying member for conveying the recording medium.
摘要:
A process cartridge mounting and demounting mechanism detachably mounts a process cartridge to a main assembly of an electrophotographic image forming apparatus. The mechanism includes an opening through which the process cartridge is mounted and demounted; an opening and closing member for opening and closing the opening; a cartridge mounting member for demountably mounting the process cartridge; and a mounting member holder for movably holding the cartridge mounting member in interrelation with an operation of the opening and closing member at a first position in which the process cartridge is detachably mountable with the opening and closing member being in an open state and at a second position in which the process cartridge is capable of operation for image formation with the opening and closing member being in a closing state.
摘要:
A developing device is detachably attachable to an image forming apparatus, which has a developer carrying member, a developer regulating member, a conductive support member, and a driving gear. A first electrode member is provided at a driving side of the developer carrying member. A developing voltage is applied to the first electrode, and which electrically communicates with the conductive support member. A second electrode member electrically communicates between the conductive support member and a nondriving side of the developer carrying member.
摘要:
A developing device includes a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on an image bearing member with a developer; wherein the developer carrying member includes a first cylindrical portion and a second cylindrical portion provision data an end of the first cylindrical portion and supported by bearing portion; a first electroconductive portion extended from an outside of the second cylindrical portion into an inside and electrically connected to an electroconductive portion outside the developing device with a gap from an inner surface of the second cylindrical portion; a second electroconductive portion contacted to an inner surface of the first cylindrical portion and rotatable with the first cylindrical portion and slidable on the first electroconductive portion; wherein a developing bias is applied to a first cylindrical portion through the first and second electroconductive portion from the outside electroconductive portion of the developing device.
摘要:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus which includes an openable closing member, a first main assembly guide movable in interrelation with opening and closing action of the closing member, and a second main assembly guide, the process cartridge include a photosensitive drum; a first cartridge frame portion extending in a cartridge mounting direction to the main assembly, at one axial end portion of the drum; a first cartridge guide projected from the first cartridge frame portion, the first cartridge guide moving the cartridge toward a cartridge mounting position by movement of the first main assembly guide with the cartridge being supported on first main assembly guide, upon mounting of the cartridge to the main assembly; a second cartridge frame portion extended in the mounting direction at the other axial end portion of the drum; a second cartridge guide projected from the second cartridge frame portion, the second cartridge guide moving the cartridge toward a cartridge mounting position by movement of the second main assembly guide with the cartridge being supported on the second main assembly guide; when the cartridge is mounted to the main assembly of the apparatus; a first cartridge positioning portion for engaging with a first main assembly positioning portion provided in the main assembly to position the cartridge relative to the main assembly, the first cartridge positioning portion being projected outwardly from the first cartridge frame portion and coaxially with the drum at the one axial end of the drum; and a second cartridge positioning portion for engaging with a second main assembly positioning portion to position the cartridge relative to the main assembly when the cartridge is mounted to the main assembly, the second cartridge positioning portion being projected outwardly from the second cartridge frame portion and coaxially with the drum at the other axial end of the drum.
摘要:
A developing device includes a frame; a developer carrying member including a first cylindrical portion and a second cylindrical portion provided at an end of the first cylindrical portion; and a magnet provided in the developer carrying member, extending from inside of the developer carrying member to outside thereof. A first electroconductive portion is supported on the magnet; and a second electroconductive portion is electrically connected with an inner surface of the first cylindrical portion and in slidable contact with the first electroconductive portion. A third electroconductive portion includes a first contact portion electrically connected with the first electroconductive portion and a second contact portion. The third electroconductive portion is electrically connected with an electrical contact of a main assembly of an image forming apparatus so that a developing bias is applied to the developer carrying member.
摘要:
To obtain a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, and which is excellent in the mechanical strength at a temperature at which it is used; and an electrolyte membrane which is excellent in the dimensional stability when it is swollen by water, and of which an increase in the resistance by a reinforcing material is suppressed.A nonwoven fabric 28 containing fibers 26 of an ethylene/tetrafluoroethylene copolymer having a storage elastic modulus E′ at 25° C. of at least 8×108 Pa and a melt viscosity measured at 300° C. of higher than 60 Pa·s and at most 300 Pa·s, wherein the average fiber diameter of the fibers is from 0.01 to 3 μm; and an electrolyte membrane reinforced by the nonwoven fabric 28.
摘要:
An apparatus for producing deionized water consisting essentially of an electrodialyzer having cation exchange membranes and anion exchange membranes alternately arranged between a cathode and an anode to form demineralizing compartments and concentrating compartments, and ion exchangers accommodated in the demineralizing compartments, wherein a pressure of from 0.1 to 20 kg/cm.sup.2 is exerted between the ion exchangers accommodated in the demineralizing compartments and the cation exchange membranes and anion exchange membranes defining the demineralizing compartments.
摘要:
A porous ion exchanger which has a porous structure having ion exchange resin particles bound by a binder polymer, and which has a water permeability of at least 30 kg.multidot.cm.sup.-1 .multidot.hr.sup.-1 under a pressure of 0.35 kg/cm.sup.2.
摘要:
An anion exchanger consisting essentially of an aromatic polysulfone block copolymer of the formula: ##STR1## wherein Ar is ##STR2## or ##STR3## X is --SO.sub.2 --, ##STR4## --S-- or --O--, Y is --SO.sub.2 --, --S-- or --O--, Z is a single bond, --O--, --S--, --SO.sub.2 --, ##STR5## each of R.sub.1 to R.sub.9 which may be the same or different is a hydrocarbon group having from 1 to 8 carbon atoms, each of a to d is an integer of from 0 to 4, e is an integer of from 0 to 3, (f+g) is from 0 to 7, (h+i) is from 0 to 5, each of R.sub.10 and R.sub.11 is a hydrogen atom or a hydrocarbon group having from 1 to 6 carbon atoms, and each of m and n is an integer of from 2 to 200, provided m/n=100/1-1/10, and having anion exchange groups introduced to the aromatic rings of the copolymer.