Hollow Glass Vent Channels for Particle-Free Pressure Equalization

The patent replaces the mechanical brittle fracture separation process with a thermal separation process. A heating device is moved along with the glass strand and directed toward the desired cutting point, softening the glass locally to enable separation without mechanical force that generates particles. This substitution of mechanical action with thermal action eliminates splinter generation while maintaining cutting functionality.

The patent changes the physical state of the glass at the separation point by heating it to its softening temperature. This parameter change (from solid brittle state to softened viscous state) allows the glass to be separated without generating particles, as the softened glass can be drawn out and separated cleanly rather than fracturing mechanically.

The patent employs a dynamic heating device that moves along with the glass strand during the separation process. Rather than a static heating system, the heating device is transported synchronously with the glass strand, allowing continuous processing without stopping the production line. This dynamic approach integrates the heating function into the existing production flow, reducing overall system complexity.

The heating device serves multiple functions: it softens the glass for clean separation, and can also be used for subsequent sealing operations. By combining separation and sealing functions in a single thermal processing step, the patent reduces the number of separate devices needed, thereby reducing overall system complexity while maintaining manufacturing precision.

The patent creates the pressure equalization openings during the hot glass state, before the glass cools and solidifies. This preliminary action allows the openings to be formed cleanly when the glass is soft and pliable, avoiding the particle generation that would occur with mechanical drilling or punching after cooling. The openings are created as an integral part of the forming process rather than as a subsequent modification.

The patent utilizes the phase transition of glass from solid to softened state to create pressure equalization openings. While the glass is in its softened phase (at forming temperature), the openings are formed through the soft glass wall, allowing clean creation of apertures without particle generation. The openings remain open after cooling because they are formed through the bulk material rather than by breaking the surface.

The patent replaces mechanical cutting or drilling methods with a thermal process for creating vent holes. A heating device locally softens the glass at the desired vent hole location, allowing the glass to be punctured or drawn out to form an opening without mechanical contact that would generate particles. This thermal approach maintains ease of manufacture while eliminating particle contamination.

The patent uses heat as an intermediary to facilitate vent hole creation. Rather than directly applying mechanical force to cut or drill the vent hole (which generates particles), heat is applied first to soften the glass, creating a medium that can be easily shaped or punctured. This intermediary thermal step enables easy vent hole creation without the harmful mechanical action that would contaminate the glass interior.