Sealing status inspecting apparatus and sealing status inspecting method
First Claim
1. A sealed condition inspection apparatus that inspects an opening provided on a laminated packaging material having a thermoplastic outermost layer, a paper-made substrate layer, a conductive barrier layer, and a heat-sealable innermost layer, the opening prepared by partially cutting at least the thermoplastic outermost layer and the paper-made substrate layer and also the opening sealed in an easily-openable condition, the sealed condition inspection apparatus comprising a needle-shaped probe electrode and an earth electrode positionable on opposite sides of the opening, with the probe electrode configured so it only covers the opening;
- and a determining unit which detects current flowing between the probe electrode while out of mechanical contact with the laminated packaging material and the earth electrode via the conductive barrier layer to thus indicate that a defect exists in a sealed condition of the opening.
1 Assignment
0 Petitions
Accused Products
Abstract
A laminated packaging material is composed of a thermoplastic material outermost layer, a paper base material layer, a conductive barrier layer and a heat sealing innermost layer. An apparatus inspects an opening section, which is formed by at least partly eliminating the thermoplastic material outermost layer and the paper base material layer and by being sealed to be easily opened. In the apparatus, a probe electrode and a grounding electrode are arranged on the outer side and the inner side of the opening section, a current flowing between the probe electrode and the grounding electrode is detected by using the conductive barrier layer, and the sealing status of the opening section is inspected by a judging mechanism.
-
Citations
8 Claims
-
1. A sealed condition inspection apparatus that inspects an opening provided on a laminated packaging material having a thermoplastic outermost layer, a paper-made substrate layer, a conductive barrier layer, and a heat-sealable innermost layer, the opening prepared by partially cutting at least the thermoplastic outermost layer and the paper-made substrate layer and also the opening sealed in an easily-openable condition, the sealed condition inspection apparatus comprising a needle-shaped probe electrode and an earth electrode positionable on opposite sides of the opening, with the probe electrode configured so it only covers the opening;
- and a determining unit which detects current flowing between the probe electrode while out of mechanical contact with the laminated packaging material and the earth electrode via the conductive barrier layer to thus indicate that a defect exists in a sealed condition of the opening.
- View Dependent Claims (2, 3, 4)
-
5. A method of inspecting an opening provided on a laminated packaging material having a thermoplastic outermost layer, a paper-made substrate layer, a conductive barrier layer, and a heat-sealable innermost layer, the opening prepared by partially cutting at least the thermoplastic outermost layer and the paper-made substrate layer, and the opening being sealed in the easily-openable condition, the method comprising:
-
applying voltage between a needle-shaped probe electrode which is not in mechanical contact with the laminated packaging material and an earth electrode positioned on opposite sides of the opening, the probe electrode being positioned to only cover the opening; detecting current flowing between the probe electrode and the earth electrode via the conductive barrier layer; and determining that a sealed condition of the opening is defective when current is detected to be flowing between the probe electrode and the earth electrode. - View Dependent Claims (6, 7, 8)
-
Specification