US PATENT SUBCLASS 65 / 81
.~.~.~ By differential gas pressure

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


65 /   HD   GLASS MANUFACTURING

17.1  DF  PROCESSES {32}
66  DF  .~ Forming product or preform from molten glass {7}
68  DF  .~.~ Initial forming of hollow product or preform in mold cavity {6}
81.~.~.~ By differential gas pressure

DEFINITION

Classification: 65/81

(under subclass 68) Processes in which the forming step utilizes vacuum and/or gas pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

263+, for apparatus for blowing a glass charge in a mold in combination with means to reduce gas pressure exteriorly of the charge.