B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1069, 18/745
B29C 51/24 (2006.01) B29C 51/02 (2006.01) B29C 51/22 (2006.01) B29C 47/00 (2006.01)
Patent
CA 1169215
ABSTRACT OF THE DISCLOSURE By this invention, novel a continuous rotary thermo-forming system of the in-line type is provided. An extruded web of thermo-plastic material passes directly from the extrusion dies to a continuous thermo- forming apparatus in which vacuum means are provided for drawing the thermo- plastic material into mold cavities. The apparatus and method of this in- vention provides such a thermo-forming system in which male assist means are provided for assisting the vacuum means to effectuate a draw of the thermo-plastic material into the mold cavities and into the peripheral mold faces. A plurality of reciprocatable assist stations cooperate with the mold cavities. This serves to enhance the detail and/or depth of draw and resulting quality of the thermo-formed articles manufactured thereby. Thus, by the present invention, pressure assist devices are synchronized with rotary molding devices such that high speeds are achievable without the sacrifice of quality.
383548
Borden Ladner Gervais Llp
Maryland Cup Corporation
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