EP0807868A3
Method for detecting the status of toner using a photosensor
Abstract
A method for detecting the status of the toner in a laser printer uses a photosensor. The method includes the steps of sampling a signal generated from the photosensor, during a specified time, increasing or decreasing the value of a counter in accordance with an integral algorithm, and comparing the resultant counter value with a reference value, and displaying the status of the toner in the printer on a display device, depending on a result of such comparison. This method can accommodate relatively inexpensive photosensors. As the noise ridden signal generated by such a photosensor is effectively filtered, this method is advantageous in cost and reliability.
Term
Term ended
Projected expiry passed 15 May 2017, 9.4 years ago.
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1 sheet
Sheet 1
Every citation, both waysCites: the store holds 4 of 5
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0506423A2 | Cites | European Patent Office (EPO) | A | Search report | 1,10 |
| DE19506578A1 | Cites | Germany | A | Search report | 1,10 |
| US5317369A | Cites | United States of America | A | Search report | 1-3,10 |
| US5512980A | Cites | United States of America | A | Search report | 1,2,4,5,10,11 |
| PATENT ABSTRACTS OF JAPAN vol. 005, no. 042 (P - 053) 20 March 1981 (1981-03-20) | Non-patent | – | – | Search report | – |
12 members in 6 offices
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 19960016063 | Republic of Korea | A | |
| 9616063 | Republic of Korea | – | |
| KR19960016063 | – | – | – |
Members12
| Document | Office | Kind | |
|---|---|---|---|
| EP0807868A2 | European Patent Office (EPO) | A2 | |
| KR970073975A | Republic of Korea | A | |
| EP0807868A3This record | European Patent Office (EPO) | A3 | |
| JPH1055105A | Japan | A | |
| CN1196508A | China | A | |
| KR100189082B1 | Republic of Korea | B1 | |
| US6172697B1 | United States of America | B1 | |
| JP3178709B2 | Japan | B2 | |
| CN1099619C | China | C | |
| EP0807868B1 | European Patent Office (EPO) | B1 | |
| DE69720098D1 | Germany | D1 | |
| DE69720098T2 | Germany | T2 |
32 legal events, as 4 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Transmission of propertyTP | TP | FR | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)REGISTERED BETWEEN 20170406 AND 20170412732E | 732E | GB | |
| 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 | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119 | R119 | DE | |
| 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 | |
| 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 | |
| Fee paymentPLFP | PLFP | FR | |
| No opposition filedOpposition26N | 26N | 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 | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
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| First examination report despatched17Q | 17Q | EP | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | 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
- 0807868
- Publication, DOCDB
- 0807868
- Publication, EPODOC
- EP0807868
- Application
- 97303317
- Application, DOCDB
- 97303317
- Application, EPODOC
- EP19970303317
Titles3
- German
- Verfahren zur Tonerzustanderkennung unter Verwendung einer Fotosensor
- English
- Method for detecting the status of toner using a photosensor
- French
- Méthode de détection de l'état du toner à l'aide d'un photodétecteur
Classification
- CPC, 2
- G03G15/0856
- G03G15/0862
- IPC, 6
- B41J29 42
- B41J2 00
- G03G15 00
- G03G15 06
- G03G15 08
- G03G21 00
Designated states1
- Contracting states, 1
- Italy