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Vibration and Earthquake Isolation

Multi-sheet-glazing-unit-having-a-single-spacer-frame-and-method-of-making-same

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Multi-sheet glazing unit having a single spacer frame and method of making same

Details

Inventors: Thompson, Jr., Albert E.;
Assignee: PPG Industries Ohio, Inc. (Cleveland, OH)
Primary Examiner: Stephan; Beth A.
Assistant Examiner:
Attorney, Agent or Firm: Lepiane; Donald C.

A multi-sheet glazing unit includes a spacer frame having a pair of legs joined to a base to provide a U-shaped cross-section. A sheet e.g. glass sheet is secured by a moisture-impervious adhesive to outer surface of each of the legs of the spacer frame. A plurality of sheet retaining members in a spaced relationship to one another are maintained on the legs of the spacer frame between the glass sheets and spaced from the base. The sheet retaining members each have a groove for receiving edge of a sheet e.g. glass sheet to secure the sheet between the outer sheets. The sheet retaining member includes a first part having a vertical stop and a non-vertical platform e.g. horizontal platform and an elongated securing member detachably secured on the horizontal platform spaced from the vertical stop to form the groove. A method for making the unit is also disclosed.

DETAILED DESCRIPTION This invention relates to a sheet retaining member having a sheet engaging member having a vertical stop and a horizontal support and a securing or locking member securable on the horizontal support spaced from the vertical stop to form a groove for receiving edge portion of a sheet e.
g.
glass sheet.
This invention also relates to multi-sheet glazing units, i.
e.
, a glazing unit having three or more sheets.
The multi-sheet unit includes a spacer frame having opposed legs and a base connected to one another to have a generally U-shape.
A sheet is mounted on outer surface of each of the legs of the spacer frame, e.
g.
, by a moisture-impervious sealant.
A support facility is mounted on the spacer frame spaced from the base and between the sheets.
A sheet engaging member is mounted on the support facility between the sheets to provide a sheet retaining member, and the sheet retaining member has a groove facing the interior of the spacer frame.
The groove is formed by a wall defined as a first wall lying in a plane intersecting the base of the spacer frame and a securing or locking member secured to the sheet engaging member.
The securing member having a wall defined as a second wall lying in a plane intersecting the base of the spacer frame.
The first and second walls are spaced from one another to provide the walls of the groove of the sheet engaging member.
A third or inner sheet is mounted in the groove.
The invention further relates to a method of making a multi-sheet glazing unit.
The method includes, among other steps, the following steps.
A spacer and a plurality of sheet retaining members are provided.
At least one of the sheet retaining members has a vertical portion and a non-vertical portion to provide an edge stop, and has a securing or locking member.
The sheet retaining members are mounted on the spacer frame spaced from one another with the edge stop facing the interior of the spacer frame.
Edge portions of the sheet are biased against the edge stop afterwhich the securing member is secured to the non-vertical portion

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