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Method for the production of apertures in polystyrene foam sheet |
| T102302 |
Method for the production of apertures in polystyrene foam sheet
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| Inventor: |
Commisso |
| Date Issued: |
October 5, 1982 |
| Application: |
06/298,709 |
| Filed: |
September 2, 1981 |
| Inventors: |
Commisso; Nicholas D. (Victor, NY)
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| U.S. Class: |
264/154 |
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| Abstract: |
A method and apparatus for producing apertures such as ventilation holes and the like in a preformed sheet of polystyrene foam which comprises forming slits which extend completely through the foam structure, the slits being arranged in a predetermined pattern, and passing the preslit foam through a heating zone such as a preheat oven used in plastic thermoforming operations. The resultant heated sheet of foam, as it emerges from the oven, is characterized by having a plurality of openings or apertures in locations corresponding to the slits which were made in the foam prior to preheating. The aperture containing sheets may be subsequently subjected to a thermoforming operation whereby thermoformed objects such as produce containers are produced having ventilation openings, i.e. apertures, located in a predetermined disposition around the thermoformed tray structure. |
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