July 4, 1972

A method for inserting a flexible, oversized preform into an opening in a hollow mold is disclosed. The oversized preform is initially formed so as to have a configuration similar to that of the interior surfaces of the mold. The cross sectional size of the preform relative to the mold is temporarily reduced by forming an inwardly projecting furrow in the preform so that the preform may be inserted into the mold. An assembly for inserting the preform into the mold and reducing the cross sectional size of the preform as it is inserted into the mold is also disclosed.

7

July 4, 1972

05/008,670

February 4, 1970

29/451   29/235

B29C   70/04   (20060101)   B29C   70/42   (20060101)  

29/235   29/451   29/523  

3781155 - APPARATUS FOR INSERTING A FLEXIBLE PREFORM IN A MOLD A method for inserting a flexible, oversized preform into an opening in a hollow mold is disclosed. The oversized preform is initially formed so as to have a configuration similar to that of the interior surfaces of the mold. The cross sectional size of the preform relative to the mold is temporarily reduced by forming an inwardly projecting furrow in the preform so that the preform may be inserted into the mold. An assembly for inserting the preform into the mold and reducing the cross sectional size of the preform as it is inserted into the mold is also disclosed.