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US 9,867,946 B2Granted
Gasket for pre-filled syringe
AssigneeSumitomo Rubber Industries, Ltd.
InventorsShinya Iwano, Katsushi Maeda
Life of this patent
Estimating the term…
Abstract
The present invention aims to provide a pre-filled syringe coated with a resin film capable of reducing sliding resistance and preventing liquid leakage by a simple method. The present invention relates to a gasket for a pre-filled syringe, which has a sliding side surface that is coated with an inactive resin film and further cut to form a cut. The cut region is preferably between ring-shaped ribs on the sliding side surface, or in a ring-shaped rib on the sliding side surface.
Claims3
A gasket for a pre-filled syringe, comprising:
- a sliding side surface comprising a rubber portion that is coated with an inactive resin film,
- wherein the sliding side surface has a slit, which is formed by cutting a part of the inactive resin film,
- the slit is present from a surface of the inactive resin film to a portion of the rubber portion, and
- the slit is placed at least on a valley portion between ring-shaped ribs on the sliding side surface.
1 more element
Dependencies are inferred from the claim text.