(under the class definition) Apparatus particularly adapted to making sheets of settable inorganic material covered on both faces with a preformed sheet material.
(1) Note. In this subclass may be found, for example, apparatus in which a plastic settable material is flowed onto a backing sheet, and then a cover sheet is applied to the face opposite face from the backing sheet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39+, for plaster board making processes.
SEE OR SEARCH CLASS
425, Plastic Article or Earthenware Shaping or Treating: Apparatus,
123, for composite article making by means supporting plural preforms in spaced relation in a molding cavity.
