Patent ID: 11951290
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 0:
1. A method for producing a gasket for a medical syringe, the gasket producing method comprising the steps of:
preparing a gasket molding mold;
molding a gasket in the mold, the gasket comprising a main body having a surface laminated with a film and including a film circumferential surface portion;
removing the gasket from the mold, and then forming an annular groove in the film circumferential surface portion of the gasket circumferentially of the film circumferential surface portion such that the annular groove has a depth greater than a thickness of the film measured from the film circumferential surface portion and extending into the main body of the gasket;
depositing a fluid material in the formed annular groove and further depositing the fluid material on the annular groove circumferentially of the film circumferential surface portion of the gasket so that the fluid material partly projects from the annular groove; and
solidifying the fluid material to fix the fluid material in the annular groove and form an annular member including an annular projection projecting from the surface of the film.