Patent ID: 8069689

Claim:
A process for producing fire-polished gobs, comprising: feeding a molten glass slug into a first mold half, said first mold half comprising a first porous material that is permeable to a through-flow of a fluid; setting said through-flow to a first through-flow at a start of said feeding of said molten glass slug, said first through-flow being sufficient to produce a fluid cushion between said first mold half and said molten glass slug and to cool said molten glass slug; reducing said through flow from said first through-flow to a second through-flow while feeding said molten glass slug, said first through-flow being higher than said second through-flow, said second through-flow being sufficient to maintain said fluid cushion; and feeding an actively cooled cooling fluid through a second mold half onto a top side of said molten glass slug to cool said top side and to form a second fluid cushion between said top side and said second mold half.