-
公开(公告)号：JPH0538843A
公开(公告)日：1993-02-19
申请号：JP19459391
申请日：1991-08-05
Applicant: CASIO COMPUTER CO LTD
Inventor： YAMAMOTO TADAO
Abstract: PURPOSE:To stably form a recording image of high quality free from scumming by preventing scattering of developing agent in a developing agent transfer passage upstream of a recording section. CONSTITUTION:The forward end of a recording electrode sheet 17, as a recording electrode EL, is positioned at a location where the outer periphery of a development sleeve 15 and the circumferential surface of a cylinder electrode 5 are closely opposed to each other to form a recording section W. The arrangement of the sheet 17 is such that a large number of recording electrode wires 17a are formed in patterns on a base film l7b and a protection coat 17c, wherein an insulating coat layer 17c1 and a conductive coat layer 17c2 are layered, is applied onto said wires. And the layer 17c2 in contact with developing agent (d) is connected to earth.
-
公开(公告)号：JPH054372A
公开(公告)日：1993-01-14
申请号：JP31281291
申请日：1991-11-27
Applicant: CASIO COMPUTER CO LTD
Inventor： NAKAYAMA KENJI , TAKEUCHI EIICHI , SHIMIZU SHIGERU , YAMAMOTO TADAO , INOUE HIDEAKI , SATO YASUTO , TAKAHASHI HIDEKI , HONDA TOSHIRO , ASAKO KENICHIRO
Abstract: PURPOSE:To obtain a recording image having high resolution for a prolonged term by smoothly fluidizing a developer between a recording electrode and a counter electrode without compaction and preventing the fusion of the developer to the electrodes. CONSTITUTION:The surface layer 29b of a cylindrical electrode 29 is formed of an elastic material having surface hardness of 30 deg.-90 deg. (a JIS spring type measuring method) and a volume electric resistance value of 10 -10 (OMEGA.cm), a recording electrode, in which a slit is formed at the front end of a recording electrode sheet 17 faced oppositely to the cylindrical electrode 18, is formed, and the recording electrode is constituted so as to be held by a cushion member 28b. According to the constitution, even when a magnetic toner (d) intends to be consolidated between the electrodes by the swing of the cylindrical electrode 29 and the irregularities of the recording electrode, the recording electrode corresponding to the position of the consolidation is rocked, the cushion member 28b is deflected, the surface section 29b of the cylindrical electrode 29 is indented flexibly, and an interelectrode distance L between the recording electrode and the cylindrical electrode 29 is kept constant.
-
公开(公告)号：JPH04220669A
公开(公告)日：1992-08-11
申请号：JP40474990
申请日：1990-12-21
Applicant: CASIO COMPUTER CO LTD
Inventor： HONDA TOSHIRO , TAKEUCHI EIICHI , SHIMIZU SHIGERU , YAMAMOTO TADAO , INOUE HIDEAKI , SATO YASUTO , NAKAYAMA KENJI , TAKAHASHI HIDEKI , ASAKO KENICHIRO
IPC: G03G15/09
Abstract: PURPOSE:To provide a magnetic powder carrier, which has excellent durability because it does not have a mechanical rotational mechanism, and which is low in noise, and by which a magnetic grain can be smoothly carried along a fixed route, and which is suitable for the reduction of appropriate instrument. CONSTITUTION:Two layers of FPC films Ff, on which a lead 3 extended in parallel to the width of the surface of a base film 4 at a proper interval, turned at both side parts of the surface, is formed as pattern, are deposited on the outer peripheral surface of a magnetic support body 2. The FPC films Ff are deposited, in such a way that one lead 3B of the lower layer is put between each lead part 3A of the upper layer. AC current, the potential phase of which is differed by pi/2, is electrified to the leads 3A, 3B of each layer, and a magnetic field that proceeds along the rear surface of an upper base film 4A, is thus formed.
-
公开(公告)号：JPH04148946A
公开(公告)日：1992-05-21
申请号：JP27485190
申请日：1990-10-12
Applicant: CASIO COMPUTER CO LTD
Inventor： TAKAHASHI HIDEKI , TAKEUCHI EIICHI , SHIMIZU SHIGERU , INOUE HIDEAKI , SATO YASUTO , NAKAYAMA KENJI , HONDA TOSHIRO , ASAKO KENICHIRO , YAMAMOTO TADAO
Abstract: PURPOSE:To stably form a recording image of high resolving power on plain paper by arranging a cleaning electrode to which voltage of polarity reverse to the charged polarity of a developer is applied to a non-magnetic cylindrical body having a magnet roll supported on a shaft in a rotatable manner built therein on the upstream side of a recording position with respect to a developer feed direction. CONSTITUTION:A cleaning electrode 17d composed of a non-magnetic conductive material is arranged to the surface of a recording electrode sheet 17 at a position separated from a recording electrode part 17a1 on the upstream side. The cleaning electrode 17d is arranged so as to extend over the entire region in the lateral direction of the surface of the recording electrode sheet 17 and embedded in an insulating coating layer 17c in such a state that the upper surface thereof is exposed. A cleaning power supply 17e capable of outputting DC voltage of polarity reverse to the charged polarity of a developer is interposed between the cleaning electrode 17d and a cylindrical electrode 5. Voltage is applied and a cleaning electric field is formed to clean the peripheral surface of the cylindrical electrode 5.
-
公开(公告)号：JPH04147872A
公开(公告)日：1992-05-21
申请号：JP27299490
申请日：1990-10-11
Applicant: CASIO COMPUTER CO LTD
Inventor： INOUE HIDEAKI , SHIMIZU SHIGERU , TAKEUCHI EIICHI , SATO YASUTO , NAKAYAMA KENJI , TAKAHASHI HIDEKI , HONDA TOSHIRO , ASAKO KENICHIRO , YAMAMOTO TADAO
Abstract: PURPOSE:To form a sharp recording image with a long-term stability by a method wherein a cleaning electric field for transferring a developer on a recording electrode to an opposed electrode is formed in an electrode opposed part within a non-recording time. CONSTITUTION:Within a cleaning time t4 in a non-recording time t2, +20OV cleaning voltage V3 is applied to a cylindrical electrode 5, and a 0V OFF voltage is applied to all recording electrode lines. A cleaning electric field based on an electric potential difference of +200V in view from the cylindrical electrode 5 to the recording electrode lines is formed in an electrode opposed part. A magnetic toner on all the recording electrode lines is transferred onto the peripheral surface of the cylindrical electrode 5. An electric potential difference in this case is +50V larger than a +150V electric potential difference generated when an ON voltage is applied within a recording time t1. Therefore, the resulting strong electric field enables the magnetic toner remaining on the recording electrode lines in the recording time t1 to be also transferred to the peripheral surface of the cylindrical electrode 5. In this manner, the magnetic toner can be efficiently prevented from accumulating on the recording electrode lines, and a reduction of image contrast and an occurrence of a defective image caused by a voltage leak between recording electrode lines through an accumulated magnetic toner can be positively prevented.
-
Patent Agency Ranking
公开(公告)号：JPH04144756A
公开(公告)日：1992-05-19
申请号：JP26919290
申请日：1990-10-05
Applicant: CASIO COMPUTER CO LTD
Inventor： INOUE HIDEAKI , SHIMIZU SHIGERU , TAKEUCHI EIICHI , NAKAYAMA KENJI , TAKAHASHI HIDEKI , HONDA TOSHIRO , ASAKO KENICHIRO , SATO YASUTO , YAMAMOTO TADAO
Abstract: PURPOSE:To prevent the occurrence of contamination owing to adhesion of a developer to the end parts of a recording picture by a method wherein dummy electrodes to prevent transfer of the developer to the opposite electrode side are located to the two end parts of a train of recording electrodes. CONSTITUTION:A recording electrode wire RE 17a and a dummy electrode DE 17c are arranged in parallel on the upper stream side of a recording position. The DEC 17c holds a developer, conveyed along the upper surface thereof, so as to prevent separation of the developer therefrom. A width DW of the DE 17C is set to a value higher than a width EW of at least individual RE 17a and so as to satisfy a formula I when the arranging region width of the RE 17a is Ze and a developing region width is Zt. A recording voltage is selectively applied on each RE 17a according to recording information. Since a bias voltage is applied on a cylinder electrode CE 5 positioned facing the RE 17a, only a magnetic toner on the RE 17a is selectively transferred on the peripheral surface of the CE 5 to form a black dot. In this case, the magnetic toner conveyed to the DE 17c is not transferred to the CE 5 side and conveyed to the downstream side as it is. Namely, adhesion of the magnetic toner to two end parts in the direction of width being a non-picture part on the peripheral surface of the CE 5 is prevented.
-
公开(公告)号：JPH04110955A
公开(公告)日：1992-04-13
申请号：JP23091890
申请日：1990-08-31
Applicant: CASIO COMPUTER CO LTD
Inventor： YAMAMOTO TADAO
Abstract: PURPOSE:To stably carry the toner and to stably form the recording image extending over a long period by satisfying a specific relation among a friction coefficient of the toner and the surface of a development carrying part, a friction coefficient of the toner and the peripheral surface except the development carrying part of a toner carrying and fixing sleeve, the outside diameter of the toner carrying and fixing sleeve and length in the toner carrying direction of the development carrying part. CONSTITUTION:When a friction coefficient of a toner T and the surface of a development carrying part 5a, a friction coefficient of the toner T and the peripheral surface except the development carrying part 5a of a toner carrying and fixing sleeve 5, the outside diameter of the toner carrying and fixing sleeve 5, and length in the toner carrying direction of the development carrying part 5a are denoted as mup, muc, D, and A, respectively, a relation of an expression I is satisfied. In such a way, the toner T can be carried uniformly and stably without sliding it by appropriate layer thickness to an electrode opposed part, while holding a minute gas to paper P, and a satisfactory recording image being free from an image failure caused by a toner carrying failure can be formed stably on plain paper.
-
公开(公告)号：JPH0451054A
公开(公告)日：1992-02-19
申请号：JP15934890
申请日：1990-06-18
Applicant: CASIO COMPUTER CO LTD
Inventor： ASAKO KENICHIRO , TAKEUCHI EIICHI , SHIMIZU SHIGERU , YAMAMOTO TADAO , INOUE HIDEAKI , SATO YASUTO , NAKAYAMA KENJI , TAKAHASHI HIDEKI , HONDA TOSHIRO
Abstract: PURPOSE:To stably form a recorded image of a high resolution by facing a recording electrode and a cylindrical electrode also serving as an intermediate recording medium installed in parallel with minimum spacing in between them on a developer carrier member and impressing AC bias voltage on the cylindrical electrode. CONSTITUTION:This recorder is provided with a developer carrying member 14, a developer carrying means Uw carrying developer d along the surface of the former, the multiple number of recording electrodes 20a installed in parallel retaining electrical insulation with each other on the surface of the developer carrier member 14 at the specified intervals, the cylindrical electrode 5 installed facing the former at a specified interval and a recording electrode driving means 21 impressing recording voltage responding to the recording information on each recording electrode 20a. Furthermore, a bias power source 5a impressing bias voltage to the cylindrical electrode 5, and a voltage control means controlling recording voltage and the bias voltage are provided. Thus, normal paper can be utilized and a bright image of the high resolution can also be obtained.
-
公开(公告)号：JPH047580A
公开(公告)日：1992-01-10
申请号：JP10928390
申请日：1990-04-25
Applicant: CASIO COMPUTER CO LTD
Inventor： TAKEUCHI EIICHI , SHIMIZU SHIGERU , YAMAMOTO TADAO , INOUE HIDEAKI , SATO YASUTO , NAKAYAMA KENJI , TAKAHASHI HIDEKI , HONDA TOSHIRO , ASAKO KENICHIRO
IPC: G03G15/09
Abstract: PURPOSE:To carry magnet powder along a desired circulation path without requiring any rotary mechanism by arranging plural exciting coils along the internal surface of a nonmagnetic sleeve and feeding pulse-width modulating (PWM) currents phases of which are shifted by a proper quantity to those exciting coils. CONSTITUTION:A coil roll R which is fitted and fixed in a sleeve 2 is constitut ed by extending plural projection stripe parts 3a on the peripheral surface of a base roll 3, made of a magnetic body, axially at equal intervals and wind ing conductors 4a around the respective projection stripe parts 3a into coils 4. Then the (m) coils are fed with (m) kinds (m phases) of alternating currents (PWM current) by pulse-width modulation (PWM), phases of which are shifted by pi/m, in the arrangement order. Namely, two kinds (two) PWM current phases which of are pi/2 are fed to coils 4A and -4A in a group A and coils 4B and 4B in a group B respectively. Consequently, magnetic powder is conveyed with out providing any mechanical rotary mechanism.
-
公开(公告)号：JPH03236068A
公开(公告)日：1991-10-22
申请号：JP3282890
申请日：1990-02-14
Applicant: CASIO COMPUTER CO LTD
Inventor： YAMAMOTO TADAO
Abstract: PURPOSE:To stabilize the conveyance of toner and to obtain an image of high quality by specifying the coefficient of friction between toner and the surface of a toner conveyance body and the coefficient of friction between the toner and a cylindrical fixed sleeve as shown by an expression. CONSTITUTION:A form P is conveyed between a developing unit 2 and a recording head 3; and a form cassette and a conveyor roller are arranged on the upstream side and a conveyor belt and a paper discharge tray are arranged on the downstream side. The coefficient mup of friction between the toner T and the surface of the toner conveyance body and the coefficient muc of friction between the toner T and cylindrical fixed sleeve 5 are specified as shown by the expression I. Then a toner image which is printed is conveyed while the toner does not slip, so the toner T never banks on a dielectric film 6 and is layered to constant thickness, so that the image of high quality is obtained. In the expression I, D is the external diameter of the sleeve 5 and A is the width of the toner conveyance body.
-
-
-
-
-
-
-
-
-
Search Results
107
records
(took 0.031 seconds)
