B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1074
B29C 51/04 (2006.01) B29C 51/42 (2006.01) B29C 69/00 (2006.01) B65D 1/26 (2006.01) B29C 51/10 (2006.01)
Patent
CA 1150469
ABSTRACT A method of forming plastics containers in quantity for plastics sheet, said containers being provided with top flanges by which the container tops maybe rim rolled sealed by metal lids. The plastics materials sheet is hot and annular regions are chilled to remove heat therefrom and leave hot circular regions which are formed into the individual containers. The chilling of the annular regions outwardly of where the cuts are made in the material to remove the thermoformed containers ensures that in the said top flanges the plastics material will be thinned down and radially orientated which inhibits cracking of the plastics material during seaming with the metal lids. The containers are specifically designed for holding carbonated beverage and specifically a plastics material is a polyester material, especially polyethylene terepthalate of high molecular weight.
345594
George H. Riches And Associates
Plastona (john Waddington) Limited
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