Process for producing a lighting louver

Details Process for producing a lighting louver Process for producing a lighting louver

1997-09-05

1999-09-28

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

264 19, 264 27, 264156, 264163, 264322, 264554, 425388, 425808, B29C 5110, B29D 1100

Patent

active

059583266

ABSTRACT:
A process is described for forming a lighting louver that includes a plurality of louver members. The process includes the steps of providing a sheet of thermoformable material and heating the sheet to a pliable state. A further step includes providing a forming mandrel having a series of mandrel partitions arranged with spaces between the partitions. The heated sheet is positioned over the forming mandrel, and is forced against the forming mandrel to form the heated sheet over the mandrel partitions and thereby produce a formed louver blank including formed louver segments that conform to the mandrel partitions and webbing segments that span the spaces between the partitions on the forming mandrel. In one preferred form the webbing segments are removed. In another preferred form, transparent webbing segments are formed that do not require removal and will transmit light. The webbing segments in the first form are removed from the louver blank to form light transmissive openings through the louver blank.

REFERENCES:
patent: 3124310 (1964-03-01), Lipscomb
patent: 4330500 (1982-05-01), Mackes
patent: 4582665 (1986-04-01), Jabarin
patent: 4621309 (1986-11-01), Grawe et al.
patent: 4751626 (1988-06-01), Plewman
patent: 5431862 (1995-07-01), Win

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