Method and apparatus for producing hollow glass body products, and hollow glass body products and their use

Abstract

A method for producing a hollow glass body product includes: providing a hollow glass body having an outer surface; forming the hollow glass body product so as to have a first end portion and a second end portion, the first end portion being sealed by a first bottom and the second end portion being sealed by a second bottom; and laser-based irradiating of the hollow glass body with focused laser radiation to produce a plurality of spaced apart filamentary defects in a predetermined arrangement pattern in the outer surface of at least the first end portion, thereby generating a plurality of open passages connecting an interior of the hollow glass body to the outer surface thereof by at least part of the filamentary defects. A diameter of the passages is sized to be less than 50 micrometers and a plurality of the open passages provide gaseous communication to the interior.

Dependencies are inferred from the claim text.