CARRIER

PROBLEM TO BE SOLVED: To obtain a carrier having stable resistance for a long time with which a developer having good durability and a long life without spent of a toner can be obtd. and a copy image showing good reproducibility of dots and a good roughness state in a halftone area can be obtd. SOLU...

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Hauptverfasser:	UCHIYAMA KENJI, YAMAMOTO TAKU, MATSUMOTO TAKATSURU
Format:	Patent
Sprache:	eng
Schlagworte:	CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS
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creator	UCHIYAMA KENJI YAMAMOTO TAKU MATSUMOTO TAKATSURU
description	PROBLEM TO BE SOLVED: To obtain a carrier having stable resistance for a long time with which a developer having good durability and a long life without spent of a toner can be obtd. and a copy image showing good reproducibility of dots and a good roughness state in a halftone area can be obtd. SOLUTION: This carrier has the following properties. A magnetic material having the relation of (major axis/minor axis)>1 is used, and fine particles of the magnetic material shows 30 to 150 emu/cm magnetization in 1000 Oe magnetic field, >=25 emu/cm magnetization in 0 Oe magnetic field after the magnetic material is magnetically saturated, and =90% coating rate of the resin on the carrier core surface are >=80% in number of the whole particles, and the carrier has 10 to 10 Ω.cm.
format	Patent
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SOLUTION: This carrier has the following properties. A magnetic material having the relation of (major axis/minor axis)>1 is used, and fine particles of the magnetic material shows 30 to 150 emu/cm magnetization in 1000 Oe magnetic field, >=25 emu/cm magnetization in 0 Oe magnetic field after the magnetic material is magnetically saturated, and <300 Oe coercive force. The carrier particles have 5 to 100 μm average particle size, <=3.0 g/cm bulk density and 30 to 99 wt.% content of the magnetic material. The particle consists of a core material coated with a resin having >=10 Ω.cm specific resistance at 22 deg.C and 55% RH. Carrier particles having >=90% coating rate of the resin on the carrier core surface are >=80% in number of the whole particles, and the carrier has 10 to 10 Ω.cm.</description><edition>6</edition><language>eng</language><subject>CINEMATOGRAPHY ; ELECTROGRAPHY ; ELECTROPHOTOGRAPHY ; HOLOGRAPHY ; MAGNETOGRAPHY ; PHOTOGRAPHY ; PHYSICS</subject><creationdate>1999</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19991015&DB=EPODOC&CC=JP&NR=H11282213A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19991015&DB=EPODOC&CC=JP&NR=H11282213A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>UCHIYAMA KENJI</creatorcontrib><creatorcontrib>YAMAMOTO TAKU</creatorcontrib><creatorcontrib>MATSUMOTO TAKATSURU</creatorcontrib><title>CARRIER</title><description>PROBLEM TO BE SOLVED: To obtain a carrier having stable resistance for a long time with which a developer having good durability and a long life without spent of a toner can be obtd. and a copy image showing good reproducibility of dots and a good roughness state in a halftone area can be obtd. SOLUTION: This carrier has the following properties. A magnetic material having the relation of (major axis/minor axis)>1 is used, and fine particles of the magnetic material shows 30 to 150 emu/cm magnetization in 1000 Oe magnetic field, >=25 emu/cm magnetization in 0 Oe magnetic field after the magnetic material is magnetically saturated, and <300 Oe coercive force. The carrier particles have 5 to 100 μm average particle size, <=3.0 g/cm bulk density and 30 to 99 wt.% content of the magnetic material. The particle consists of a core material coated with a resin having >=10 Ω.cm specific resistance at 22 deg.C and 55% RH. Carrier particles having >=90% coating rate of the resin on the carrier core surface are >=80% in number of the whole particles, and the carrier has 10 to 10 Ω.cm.</description><subject>CINEMATOGRAPHY</subject><subject>ELECTROGRAPHY</subject><subject>ELECTROPHOTOGRAPHY</subject><subject>HOLOGRAPHY</subject><subject>MAGNETOGRAPHY</subject><subject>PHOTOGRAPHY</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1999</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZGB3dgwK8nQN4mFgTUvMKU7lhdLcDIpuriHOHrqpBfnxqcUFicmpeakl8V4BHoaGRhZGRobGjsbEqAEACY8bIA</recordid><startdate>19991015</startdate><enddate>19991015</enddate><creator>UCHIYAMA KENJI</creator><creator>YAMAMOTO TAKU</creator><creator>MATSUMOTO TAKATSURU</creator><scope>EVB</scope></search><sort><creationdate>19991015</creationdate><title>CARRIER</title><author>UCHIYAMA KENJI ; YAMAMOTO TAKU ; MATSUMOTO TAKATSURU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH11282213A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1999</creationdate><topic>CINEMATOGRAPHY</topic><topic>ELECTROGRAPHY</topic><topic>ELECTROPHOTOGRAPHY</topic><topic>HOLOGRAPHY</topic><topic>MAGNETOGRAPHY</topic><topic>PHOTOGRAPHY</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>UCHIYAMA KENJI</creatorcontrib><creatorcontrib>YAMAMOTO TAKU</creatorcontrib><creatorcontrib>MATSUMOTO TAKATSURU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>UCHIYAMA KENJI</au><au>YAMAMOTO TAKU</au><au>MATSUMOTO TAKATSURU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>CARRIER</title><date>1999-10-15</date><risdate>1999</risdate><abstract>PROBLEM TO BE SOLVED: To obtain a carrier having stable resistance for a long time with which a developer having good durability and a long life without spent of a toner can be obtd. and a copy image showing good reproducibility of dots and a good roughness state in a halftone area can be obtd. SOLUTION: This carrier has the following properties. A magnetic material having the relation of (major axis/minor axis)>1 is used, and fine particles of the magnetic material shows 30 to 150 emu/cm magnetization in 1000 Oe magnetic field, >=25 emu/cm magnetization in 0 Oe magnetic field after the magnetic material is magnetically saturated, and <300 Oe coercive force. The carrier particles have 5 to 100 μm average particle size, <=3.0 g/cm bulk density and 30 to 99 wt.% content of the magnetic material. The particle consists of a core material coated with a resin having >=10 Ω.cm specific resistance at 22 deg.C and 55% RH. Carrier particles having >=90% coating rate of the resin on the carrier core surface are >=80% in number of the whole particles, and the carrier has 10 to 10 Ω.cm.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record>
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subjects	CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS
title	CARRIER
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