| (19) |
 |
|
(11) |
EP 0 436 306 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
18.03.1992 Bulletin 1992/12 |
| (43) |
Date of publication A2: |
|
10.07.1991 Bulletin 1991/28 |
| (22) |
Date of filing: 03.12.1990 |
|
|
| (84) |
Designated Contracting States: |
|
DE GB |
| (30) |
Priority: |
06.12.1989 JP 317061/89
06.12.1989 JP 317063/89
07.12.1989 JP 318509/89
11.12.1989 JP 320937/89
|
| (71) |
Applicant: KONICA CORPORATION |
|
Tokyo 160 (JP) |
|
| (72) |
Inventors: |
|
- Fuma, Hiroshi
Hachioji-shi,
Tokyo (JP)
- Motohashi, Mitsuo
Hachioji-shi,
Tokyo (JP)
- Fujii, Yozo
Hachioji-shi,
Tokyo (JP)
- Kakita, Akihiko
Hachioji-shi,
Tokyo (JP)
|
| (74) |
Representative: Ben-Nathan, Laurence Albert et al |
|
Urquhart-Dykes & Lord
91 Wimpole Street
London W1M 8AH
London W1M 8AH (GB) |
|
| |
|
| (54) |
Image forming apparatus |
(57) An image forming apparatus for forming a toner image on a peripheral surface of an
image carrying drum (10) and transferring the toner image onto a recording paper.
The image forming apparatus comprises a conveyor (71) to convey the recording paper,
a register roller (79) to feed the same to the conveyor (71), transfer unit (70) for
transfering the toner image and a pre-charging unit (60) for charging the recording
paper before the transferring. A controller of the image forming apparatus controls
operation timings of the above units of the image forming apparatus and forms a blank
area in the leading portion of the recording paper where no image is formed and no
transfer operation is performed to the recording paper by the transfer unit.