| (19) |
 |
|
(11) |
EP 0 430 098 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
17.03.1993 Bulletin 1993/11 |
| (43) |
Date of publication A2: |
|
05.06.1991 Bulletin 1991/23 |
| (22) |
Date of filing: 23.11.1990 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
29.11.1989 JP 310955/89
29.11.1989 JP 310960/89
29.11.1989 JP 310961/89
|
| (71) |
Applicant: MITA INDUSTRIAL CO., LTD. |
|
Osaka 540 (JP) |
|
| (72) |
Inventors: |
|
- Ishida, Hideki
Yao-shi,
Osaka 581 (JP)
- Kusumoto, Hiroshi
Wakayama-shi,
Wakayama 640 (JP)
- Miyamoto, Naruyuki
Sakai-shi,
Osaka 590-01 (JP)
- Ishii, Yoshifumi
Daito-shi,
Osaka 574 (JP)
- Kitagawa, Shoichi
Neyagawa-shi,
Osaka 572 (JP)
|
| (74) |
Representative: Patentanwälte
Beetz - Timpe - Siegfried
Schmitt-Fumian - Mayr |
|
Steinsdorfstrasse 10
80538 München
80538 München (DE) |
|
| |
|
| (54) |
Feed roller for mixing a powder |
(57) In a feed roller for mixing a developer and feeding it to a developing roller, a
first mixing wing (40) parallel to a rotating shaft (43) is provided, a second spiral-shape
mixing wing (41) is diagonally provided in a manner to cross the first wing (40),
and a spiral-shape groove (42) for feeding a powder is formed on the one side located
on the forward section with respect to rotating direction and being the powder scraping-up
side of the both sides of said second mixing wing (41), along said second mixing wing
(41), so as to enhance the feed performance, lateral-mixing performance and lateral-feed
performance of the feed roller.