US PATENT SUBCLASS 65 / 33.5
.~.~ With fusion bonding glass to a formed part (e.g., devitrified seals, glass to metal, etc.)

Current as of: June, 1999
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65 /   HD   GLASS MANUFACTURING

17.1  DF  PROCESSES {32}
33.1  DF  .~ Devitrifying glass or vitrifying crystalline glass (e.g., starting with or forming crystalline glass, etc.) {6}
33.5.~.~ With fusion bonding glass to a formed part (e.g., devitrified seals, glass to metal, etc.) {1}
33.6  DF  .~.~.~> Glass applied in powdered form (i.e., frit)

DEFINITION

Classification: 65/33.5

With fusion bonding glass to a formed part (e.g., devitrified seals, glass to metal, etc.):

(under subclass 33.1) Processes directed to fusion bonding of a glass part to another part of the same or different preform by adherence or coherence at the interface of the parts, wherein at least one of the parts is self-supporting prior to the bonding operation.

(1) Note. The coherence is usually effected by heat, externally applied or by the residual heat retained by the glass part from a previous operation, which renders the adherent face of the vitrified or devitrified glass part soft, thereby permitting fusion bonding directly to the adherent face of the other part.

SEE OR SEARCH CLASS

29, Metal Working,

428+, and 700+ for a process or apparatus, respectively, for mechanical joining of parts.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclasses for processes and apparatus for adhesive securing of parts other than by glass fusion or metal fusion, see especially

89.11+, for a process of laminating comprising decal-type transfer of a lamina of ceramic material to a base with subsequent firing thereof to bond the lamina to the base, and subclasses 99+ for optically transparent glass sandwich making including a Class 156 bonding combined with a Class 65 reshaping (e.g., bending) operation. A process reciting a Class 156 bonding step and a Class 65 bonding step is classified in Class 65. 228, Metal Fusion Bonding, for bonding of glass to metal by metal solder.