초록 ▼

A closure device for fermentation test tubes or flasks comprises a cylindrical cap which fits snugly over the mouth and neck of a test tube or flask to maintain the sterility of the tube or flask contents while permitting the free flow of gases into and out of the tube or flask. An aperture in the e

A closure device for fermentation test tubes or flasks comprises a cylindrical cap which fits snugly over the mouth and neck of a test tube or flask to maintain the sterility of the tube or flask contents while permitting the free flow of gases into and out of the tube or flask. An aperture in the end cap of the closure device permits free access to the tube or flask contents for sampling and is closed by a moveable aperture cover.

대표청구항 ▼

A fermentation vessel closure device comprising a cylindrical wall portion open at one end thereof and having at the other end thereof a capping end; means for engaging the mouth of a fermentation vessel disposed along the inner surfaces of said cylclindrical wall portion and said capping end to per

A fermentation vessel closure device comprising a cylindrical wall portion open at one end thereof and having at the other end thereof a capping end; means for engaging the mouth of a fermentation vessel disposed along the inner surfaces of said cylclindrical wall portion and said capping end to permit the free flow of gases into and out of the fermentation vessel; an aperture in said capping end to permit access to the contents of the fermentation vessel; and moveable means for closing said aperture; wherein said moveable means for closing said aperture comprises a pinch valve.