Vacuum forming machine

Details Vacuum forming machine Vacuum forming machine

2006-10-31

2006-10-31

Sells, James (Department: 1734)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S285000, C156S292000, C156S494000, C156S510000, C264S545000, C425S388000, C425S504000

Reexamination Certificate

active

07128800

ABSTRACT:
A vacuum forming machine and a method of manufacturing a duplex twin-sheet element from two continuous webs of thermoplastic material conveyed in parallel by means of a twin-sheet frame provided therebetween, which is adapted to be loaded by means of a tensioning frame for creating closed machine chambers with the material web sections to be shaped, provides for the aspect that the twin-sheet frame is provided with a front frame section in the front along the conveying direction of said material webs, which frame section can be removed for de-moulding said twin-sheet element. The material webs are conveyed in a cycled operation when the twin-sheet frame is not loaded and open in the conveying direction, and for forming a twin-sheet element, the twin-sheet frame is closed and loaded by the tensioning frame.

REFERENCES:
patent: 5500067 (1996-03-01), Jenkner
patent: 6372176 (2002-04-01), Ekendahl et al.
patent: 24 27 311 (1975-12-01), None
patent: 0 571 897 (1993-12-01), None
patent: 0 761 412 (1997-03-01), None

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