(under subclass 111) Processes in which the treating step includes heating the glass to a temperature sufficient to render it plastic, but insufficient to produce a significant plastic flow that would cause alteration of physical shape and size, combined with a step of (1) penetrating the plastic glass to effect at least a partial separation of the glass without reshaping flow of the glass, or (2) moving one part of the plastic glass relative to the other to cause failure by tension at the point of separation, usually by stretching or (3) penetrating the plastic glass to form a closed perimeter opening extending completely through the glass, or (4) cutting or perforating of hard glass combined with glass treating.
SEE OR SEARCH THIS CLASS, SUBCLASS:
56, for a process of bonding glass to a formed part including severing, perforating or breaking of hard or soft glass.
63, for a process of sequentially forming, reheating and severing, perforating or breaking of hard or soft glass.
70, for a process of forming an article from molten glass combined with the step of severing soft or hard glass.
87, for a process of drawing and simultaneously forming hollow stock from molten glass including severing or perforating of hard or soft glass. 97, for a process of forming a sheet combined with the step of severing or perforating of the hard or soft sheet.
105, for a process of reshaping or surface deforming a glass preform combined with severing or perforating of hard or soft glass.
166, for apparatus under the class definition comprising a perforator for an article or preform.
174+, for apparatus under the class definition combined with a mechanical cutter, scorer or scriber for an article or preform.
SEE OR SEARCH CLASS
83, Cutting,
879+, for a scoring process or apparatus, per se; see the collection of "Search Notes" thereunder for mechanically cutting, scoring or scribing hard or soft glass.
