Bottles and jars – Closures – Stopper type
Patent
1988-03-21
1989-04-18
Morgenstern, Norman
Bottles and jars
Closures
Stopper type
427 40, 427325, 204165, B05D 306, B05D 300, B65D 3900
Patent
active
048219002
ABSTRACT:
A process for impregnating corks, in such a way as to improve the sealing effect thereof, with at least one substance which is repellent to aqueous solutions and which is comparable or identical to aqueous solution-repellent substances naturally occurring in cork, in regard to sealing effect and compatibility with the material to be sealed in a container by the cork, provides that prior to the impregnation step on a surface thereof which is to be impregnated the cork is exposed to direct current corona discharge or an alternating current corona discharge, thereby enhancing the capacity of the cork to absorb the impregnation agent.
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J. F. Hughes, Electrostatic Powder Coating, John Wiley & Sons Inc., New York 1984 pp. 1-2.
C. W. Theron, et al., The Evaluation of Corks, 1983.
Morgenstern Norman
Padgett Marianne L.
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