Back to results
US 6,186,354 B1Granted
Wedge box of alveolar material mould and process for its production
AssigneeKnauf
InventorRené Claude Pascal
Life of this patent
Estimating the term…
Abstract
A wedge box of alveolar material having a container and a lid. The container or the lid includes a window which is transparent and which is integrated and molded in the alveolar material to permit viewing the contents of the box. The box is molded by means of a mold having two cavities which include several raised surfaces. The raised surfaces are separated by a space which permit gripping of a transparent member which is to be integrated into the box as a window. Alveolar material is introduced into the molding cavity and is then expanded.
Claims3
A wedge box of alveolar material comprising:
- a first element made of alveolar material;
- and
- a unitary element operatively associated with said first element,
- said unitary element including:
- a second element made of alveolar material;
- and
- a transparent window integrally molded into said second element,
- whereby a rim portion of said transparent window is integrated into and forms an inviolable part of the mass of the alveolar material of said second element.
5 more elements
A wedge box of alveolar material comprising:
- a first element made of alveolar material, and
- a unitary element operatively associated with said first element,
- said unitary element including:
- a second element made of alveolar material;
- and
- a transparent window integrally molded into said second element,
- whereby a rim portion of said transparent window is integrated into and forms an inviolable part of the mass of the alveolar material of said second element.
- wherein the first and second elements are made from expanded polystyrene and the transparent window is made from compact crystal polystyrene.
5 more elements
Dependencies are inferred from the claim text.