US005291931A
United States Patent m Patent Number: 5,291,931
Kraeutler [45] Date of Patent: Mar. 8,1994
U.S. Patent Mar. 8, 1994 Sheet 2 of 3 5,291,931
[54] DEFORMABLE INSULATING PANEL FOR A GOODS-HANDLING DOOR, AND A DOOR INCLUDING SUCH A PANEL
[75] Inventor: Bernard Kraeutler, Dunieres, France
[73] Assignee: Nergeco (societe anonyme), Dunieres, France
[21] Appl. No.: 970,785
[22] Filed: Not. 3,1992
[30] Foreign Application Priority Data
Nov. 7, 1991 [FR] France 91 13726
[51] Int. CI.5 E06B 9/06
[52] U.S. CI 160/84.1 R
[58] Field of Search 160/84.1, 370.2, 121.1,
160/230, 231.1, 231.2
[56] References Cited
U.S. PATENT DOCUMENTS
2,865,446 12/1958 Cole 160/121.1 X
4,039,019 8/1977 Hopper 160/121.1
4,375,232 3/1983 Heescher et al 160/84.1
4,397,347 8/1983 Brabant 160/231.2
4,685,986 8/1987 Anderson 160/84.1 X
5,078,195 1/1992 Schon 160/84.1
FOREIGN PATENT DOCUMENTS
0076349 4/1983 European Pat. Off. .
0113634 12/1984 European Pat. Off. .
3248083 6/1984 Fed. Rep. of Germany .
15913 12/1990 PCT Int'l Appl. .
Primary Examiner—David M. Purol
Attorney, Agent, or Firm—Sughrue, Mion, Zinn,
Macpeak & Seas
[57] ABSTRACT
A goods-handling door for separating different spaces in factories or warehouses includes a curtain that can be raised by being wound up or by being folded up concertina-like. The curtain is insulating both with respect to heat and with respect to noise, while being transparent so that one vehicle can be seen by another if they approach the door from opposite sides. The door includes two airtight flexible skins that lie parallel to each other and that sandwich spreaders between them. The spreaders are spaced apart and define intermediate spaces between the two skins. The spaces are filled with air, which provides the required insulation. Since the two skins are transparent, the door is transparent in the vicinity of the intermediate spaces.
12 Claims, 3 Drawing Sheets
