Plastic bending

Details Plastic bending Plastic bending

B - Operations, Transporting

29

C

18/1077

B29C 53/04 (2006.01) B41J 29/08 (2006.01)

Patent

CA 1280571

-15- ABSTRACT OF THE DISCLOSURE An acoustic enclosure (10) has interconnected sound reducing sheets forming a substantially rectangular structure which is con- figured to house a computer printer or other noise generating arti- cle. A rigid thermpolastic hinged sheet (22) having a uniform non- pinched bend (52) is provided as a window for the enclosure. Method and apparatus for producing such bends comprise use of sequentially initiated heating of the bottom (wide band continuous band heating to softening point) and then top of the sheet (narrow band focussed heating to a narrow bend) to make the sheet so bendable. The bent sheet serves as a supplemental panel extension to afford view zones of the enclosure. The various (side type, rear type) panels, with and without such sheet extensions, are also usable in the non- enclosing uses, including use as walls or room-dividers. Electrical wiring and fixtures and panel surface mounted heaters can be accom- modated by the allowable constructions of the panels. The thin outer stratum can be replaced by an adhesive.

493826

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