EP 0221842 A1 19870513 - Pour opening in a container cover with a pull tab , and production of this opening.
Title (en)
Pour opening in a container cover with a pull tab , and production of this opening.
Title (de)
Ausgussöffnung in einem Behälterdeckel mit Aufreisslasche und Herstellung dieser Öffnung.
Title (fr)
Orifice verseur dans un couvercle d'un conteneur avec opercule arrachable et fabrication de cet orifice.
Publication
Application
Priority
CH 429385 A 19851004
Abstract (en)
1. Method of producing a finished pour opening in a container cover formed from aluminium as a light and gas barrier and from plastics material as protective and sealing layers, having a cutting edge, which is protected from corrosion, along the punched rough opening, characterized in that a) the rough opening (9) is punched-out ; b) a rolled flange (11) is produced along the rough opening (9) in such a manner that the cutting edge (19) abuts, or almost abuts, the root (17) of the rolled flange (11) ; c) the rolled flange (11) is flattened in a calibration station (13), and an accurately defined, calibrated, finished opening (99) is produced ; and d) the rolled flange (11) is thereby flattened until the protective layer (15), which is applied to the cover (1), is displaced from the interior of the rolled flange (11) between the cutting edge (19) and the root (17) in such a manner that the edge (19) is covered with the displaced protective layer (15) and is sealed against corrosion.
Abstract (de)
Der Deckel (l) für einen Behälter weist eine kalibrierte Oeffnung (3) auf, deren Rand als Rollbördel (ll) ausgebildet und beim Kalibrieren derart zusammengedrückt worden ist, dass die austretende, weichgewordene Kunststoffschicht (l5) die Schnittkante (l9) des Rollbördels (ll) gegen Korrosion schützt.
IPC 1-7
IPC 8 full level
B21D 51/38 (2006.01); B65D 17/34 (2006.01); B65D 17/50 (2006.01)
CPC (source: EP US)
B21D 51/383 (2013.01 - EP); B65D 53/08 (2013.01 - EP US); B65D 2517/0013 (2013.01 - EP); B65D 2517/0086 (2013.01 - EP); B65D 2517/0088 (2013.01 - EP); B65D 2517/501 (2013.01 - EP); B65D 2517/5032 (2013.01 - EP); B65D 2517/5054 (2013.01 - EP); B65D 2517/5083 (2013.01 - EP)
Citation (search report)
- [X] EP 0090957 A2 19831012 - SANDHERR PACKUNGEN AG [CH]
- [X] GB 2022474 A 19791219 - ALUSUISSE
- [A] US 2849164 A 19580826 - WEISGERBER WILLIAM C
- [A] US 4332846 A 19820601 - FISCHER JOSEPH, et al
- [A] US 3547305 A 19701215 - KHOURY NICK S
- [A] FR 2185547 A1 19740104 - HESSER AG MASCHF [DE]
- [AD] DE 3321572 A1 19841220 - BOSCH GMBH ROBERT [DE]
- [A] PATENTS ABSTRACTS OF JAPAN, Band 9, Nr. 191 (M-402)[1914], 7. August 1985; & JP-A-60 56 430 (AKIRA KISHIMOTO) 02-04-1985
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0221842 A1 19870513; EP 0221842 B1 19891108; AT E47818 T1 19891115; DE 3666792 D1 19891214
DOCDB simple family (application)
EP 86810401 A 19860904; AT 86810401 T 19860904; DE 3666792 T 19860904