EP1384591A3
Image forming apparatus and image forming method
Abstract
Optimization of a density control factor accompanying formation of a patch image is executed every time a predetermined period of time elapses since the end of a preceding image forming operation. Since an image is formed at regular intervals in this manner, it is possible to suppress a density variation which is created as toner carried on a developer roller is left unused for long. This effect further improves when the developer roller is rotated idle prior to formation of a patch image or regularly at predetermined timing.
Term
Term ended
Projected expiry passed 17 July 2023, 3.2 years ago.
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2 sheets
Sheet 1 Sheet 2
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0589131A2 | Cites | European Patent Office (EPO) | A | Search report | 1-31 |
| EP0732631A2 | Cites | European Patent Office (EPO) | A | Search report | 1-31 |
| EP1059570A2 | Cites | European Patent Office (EPO) | XA | Search report | 11,15 |
| US5754919A | Cites | United States of America | A | Search report | 1-31 |
| US6349183B1 | Cites | United States of America | XA | Search report | 11,15 |
21 members in 6 offices
Priority claims40
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| 2002211582 | Japan | A | |
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Members21
| Document | Office | Kind | |
|---|---|---|---|
| EP1384591A2 | European Patent Office (EPO) | A2 | |
| CN1477458A | China | A | |
| US2004037577A1 | United States of America | A1 | |
| JP2004102239A | Japan | A | |
| JP2004102240A | Japan | A | |
| EP1384591A3This record | European Patent Office (EPO) | A3 | |
| JP2004109980A | Japan | A | |
| JP2004126519A | Japan | A | |
| US7068957B2 | United States of America | B2 | |
| US2006165426A1 | United States of America | A1 | |
| US7251423B2 | United States of America | B2 | |
| EP1384591B1 | European Patent Office (EPO) | B1 | |
| AT380671T | Austria | T | |
| ATE380671T1 | Austria | T1 | |
| DE60317979D1 | Germany | D1 | |
| CN100367117C | China | C | |
| EP1886825A1 | European Patent Office (EPO) | A1 | |
| CN101140438A | China | A | |
| DE60317979T2 | Germany | T2 | |
| JP4396152B2 | Japan | B2 | |
| CN101140438B | China | B |
59 legal events, as 6 offices reported them to INPADOC
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| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119 | R119 | DE | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
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| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
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| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
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| Fr: translation filedET | ET | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Patent ceasedCeasedPL | PL | CH | |
| Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents actLapsedNLV1 | NLV1 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
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| European patents granted designating irelandGrantedFG4D | FG4D | IE | |
| European patent takes effect as a national patent in ch/liEP | EP | CH | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS | GRAS | EP | |
| Information related to communication of intention to grant a patent modifiedORIGINAL CODE: EPIDOSCIGR1GRAC | GRAC | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP | GRAP | EP | |
| Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deletedORIGINAL CODE: EPIDOSDIGR1GRAJ | GRAJ | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP | GRAP | EP | |
| Designation fees paidAKX | AKX | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAX | AX | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAX | AX | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 1384591
- Publication, DOCDB
- 1384591
- Publication, EPODOC
- EP1384591
- Application
- 3015652
- Application, DOCDB
- 03015652
- Application, EPODOC
- EP20030015652
Titles3
- German
- Bilderzeugungsgerät und Verfahren zur Bildherstellung
- English
- Image forming apparatus and image forming method
- French
- Appareil de formation d' images et méthode de formation d' images
Classification
- CPC, 1
- B41J2/41
- IPC, 5
- B41J2 41
- G03G15 00
- G03G15 01
- G03G15 08
- G03G21 00
Designated states2
- Contracting states, 1
- Türkiye
- Extension states, 1
- North Macedonia