Title:
【発明の名称】包装シート材の開口装置
Document Type and Number:
Japanese Patent JP2001504782
Kind Code:
A
Abstract:
An opening device (2) attached at a hole (4) in a top wall portion (16) of a packaging container (12) and positioned adjacent a fold line (14) of the packaging container, including a base portion (8) connected to the top wall at the hole, and a lid portion (10) releasably connected to the base portion, in which the base portion has a portion (26) protruding from a main circumferential portion (24) towards the fold line (14), for providing increased stability of the container during storage and transport. A tamper evidence protrusion (11), also functioning as a pull tab for opening the lid portion, extends from the lid portion to be connected to an outer side (6b) of the top wall portion. A reduced thickness tearing edge (28) is provided between the base portion and the lid portion for facilitating opening, and a bistable hinge (9) releasably biases the lid portion to stably remain in an open position, for avoiding interference of the lid portion during product dispensing. The base portion has an upper ring portion (30) and the lid portion has a lower ring portion (32) which after the release of the lid portion from the base portion may be mutually intermated in a releasably locked manner, so as to reseal the opening device.
Inventors:
Rendena, Antonio
Carralson, Magne
Bravaldo, Torad
Carralson, Magne
Bravaldo, Torad
Application Number:
JP52034598A
Publication Date:
April 10, 2001
Filing Date:
September 23, 1997
Export Citation:
Assignee:
Tetra Laval Holdings Financiers Society Anonym
International Classes:
B65D5/74; B65D17/40; B29C45/14; (IPC1-7): B65D5/74
Domestic Patent References:
| JPH0635118U | 1994-05-10 | |||
| JPS62125721U | 1987-08-10 | |||
| JPS4812265B1 | 1973-04-19 | |||
| JPS62201223A | 1987-09-04 | |||
| JPH0858781A | 1996-03-05 | |||
| JPH0456623U | 1992-05-14 | |||
| JPS6326517U | 1988-02-22 |
Attorney, Agent or Firm:
Akira Asamura (3 outside)