Invention Grant
US5256356A Method for forming an opening in a container 失效
在容器中形成开口的方法

Method for forming an opening in a container
Abstract:
A method for forming an opening in a container in which upper and lower keys, each having a shear surface, are mounted in the upper and lower mold portions, respectively, such that the shear surfaces face each other in substantially parallel alignment to form an opening in the container as the mold portions travel towards each other. The lower key is mounted about a pivot pin and spring oriented such that its shear surface rotates along an axis normal to a path of travel of the mold portions.
Information query
Patent Agency Ranking
0/0