Oblique web multiple surface panels fabricated of aromatic polycarbonates

• US 5,294,472 A
• Filed: 09/02/1992
• Issued: 03/15/1994
• Est. Priority Date: 09/04/1991
• Status: Expired due to Term

• Current Assignee: Röhm GmbH & Co. KG (Rag-Stiftung)
• Original Assignee: Degussa AG (Rag-Stiftung)
• Inventors: Arnold, Norbert, Wiebel, Wolfgang
• Primary Examiner(s): Loney, Donald J.
• Application Number:
  US07/939,599
• Time in Patent Office: 559 Days
• Field of Search: 428/178, 428/119, 428/120, 428/212, 428/156, 428/167, 428/172, 428/58, 428/61, 428/72, 428/213, 428/215, 428/219, 428/223, 428/340, 428/412, 52/793, 52/806, 52/807, 52/808
• US Class Current: 428/120
• CPC Class Codes: E04C 2/34 composed of two or more spaced sheet-like parts E04C2/32 takes precedence; spacers for cavity walls E04B2/44
• CPC Class Codes: E04C 2/543 Hollow multi-walled panels with integrated webs
• CPC Class Codes: Y10T 428/24174 including sheet or component perpendicular to plane of web or sheet
• CPC Class Codes: Y10T 428/24182 Inward from edge of web or sheet
• CPC Class Codes: Y10T 428/2457 Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/24661 Forming, or cooperating to form cells
• CPC Class Codes: Y10T 428/2495 Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/27 Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]

Abstract

Oblique web multiple surface panel boards are disclosed made of aromatic polycarbonates (PC), consisting of at least two boards arranged parallel to one another at a given distance apart and joined together by webs arranged between them, one portion of the webs connecting the upper and lower board in zigzag formation, viewed in cross-section, while the other portion of the webs is attached to the upper or lower board at the junctions of the oblique webs and extends perpendicularly towards the opposite board.

Claims

1. A surface panel board made of aromatic polycarbonates, consisting of at least two surface boards arranged parallel to one another at a predetermined distance apart and joined together by a plurality of webs arranged between them, one portion of said webs being oblique in relation to said boards and connecting said boards in zigzag formation, viewed in cross-section, while the remaining portion of said webs are vertical with respect to said board and are attached to said boards at the junctions of said oblique webs and said boards and extend perpendicularly between said boards, said oblique webs having a greater thickness then said vertical webs, the vertical webs being located alternatingly with said oblique webs.

2. The multiple surface panel board according to claim 1, wherein the oblique webs enclose an angle of about 45°

with said boards and said oblique webs have a thickness of about 0.4 mm while the thickness of the vertical webs is about 0.2 mm and the distance between said vertical webs is about 16 mm.

3. The multiple surface panel board according to claim 2 which has a weight of about 2.7 kg/m².

4. The multiple surface panel board according to claim 2 wherein the webs forming the oblique zigzag formation are at an angle of about 45°

to said boards.

5. The multiple surface panel board according to claim 2 wherein the height of the panel when viewed along its longitudinal edge is about equal to the dimension between adjacent vertical members.