Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hisashi Nakajima0
Yuji Kano0
Date of Patent
March 21, 2006
0Patent Application Number
106648690
Date Filed
September 22, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A container closure formed from a synthetic resin as a single unit has a circular top panel wall and a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall. An outer cylindrical sealing protrusion, an inner cylindrical sealing protrusion, and annular sealing ridge, all having a predetermined shape and a predetermined size, are formed on the inner surface of the top panel wall. In one embodiment, the thickness of the center portion of the top panel wall is reduced to a predetermined range and a plurality of ribs having a predetermined thickness are formed on the inner surface of the center portion of the top panel wall.
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