| (19) |
 |
|
(11) |
EP 1 676 804 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.08.2006 Bulletin 2006/31 |
| (43) |
Date of publication A2: |
|
05.07.2006 Bulletin 2006/27 |
| (22) |
Date of filing: 19.12.2005 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE
SI SK TR |
|
Designated Extension States: |
|
AL BA HR MK YU |
| (30) |
Priority: |
29.12.2004 FI 20040490 U
|
| (71) |
Applicant: Oy Core Handling Ltd |
|
53850 Lappeenranta (FI) |
|
| (72) |
Inventor: |
|
- ÄMTÖ, Pekka
FI-49420, Hamina (FI)
|
| (74) |
Representative: Langenskiöld, Tord Karl Walter |
|
Oy Jalo Ant-Wuorinen Ab,
Iso-Roobertinkatu 4-6 A
00120 Helsinki
00120 Helsinki (FI) |
|
| |
|
| (54) |
Abutment joint for paper reel cores |
(57) An abutment joint for end-to-end joining of paper reel cores, the abutment joint
comprising a first conical surface (4) formed on the outer surface of one core (2)
and a second conical surface (3) formed on the inner surface of the other core (1),
whereby said first conical surface and said second conical surface abut against each
other in the joint, wherein at least one protrusion (6) is formed at least on one
conical surface and at least one groove (5) is formed at least on the other conical
surface to form an interlocking joint between the cores.