EP 0070935 A1 19830209 - Thread construction for plastic closures.
Title (en)
Thread construction for plastic closures.
Title (de)
Gewinde für Kunstharzverschlüsse.
Title (fr)
Filetage de capuchons en matière plastique.
Publication
Application
Priority
EP 81303526 A 19810731
Abstract (en)
A screw-type closure (1) moulded of resilient plastics with an internal thread (3) having an axial pitch spacing (P2) smaller than the pitch spacing (P1) of the mating external thread (4) of the container (5) with which it is used. The difference between the pitches of the two threads (3 and 4) compensates for variables affecting sidewall characteristics around the circumference of the closure (1), to secure more uniform application of sealing pressure.
IPC 1-7
IPC 8 full level
B65D 41/04 (2006.01)
CPC (source: EP)
B65D 41/0428 (2013.01)
Citation (search report)
- GB 788148 A 19571223 - METAL BOX CO LTD
- GB 876636 A 19610906 - VAESSEN SCHOEMAKER HOLDING BV
- GB 1036399 A 19660720 - METAL BOX CO LTD
- GB 1082440 A 19670906 - METAL BOX CO LTD
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 81303526 A 19810731