Aligned Perforation Knife and Heat Seal Bar Apparatus for Vertically Positioned Horizontally Traversing Plastic Film Bags Forming Machine

摘要

In an automated machine that forms a vertically positioned and horizontally traversing web of plastic film into bags and fills the bags with material, the apparatus forms the bags sealed side edges as well as aligned perforations whereat the bags are severed from one another after they are filled with material. The web includes a pair of parallel proximate plastic film walls. A vertically positioned heat seal bar is moveable onto the web severing the walls along a separation line and forming the fore and aft sealed side edges of the bags. A perforation knife is aligned with and positioned vertically above the heat seal bar, and is simultaneously moveable onto the web walls with the heat seal bar thereby forming a vertical perforation line at a web longitudinal edge portion. The separation line and perforation line in the web are thereby aligned.

主权项

1. A apparatus for forming plastic film bags comprising:
a vertically positioned and horizontally intermittently traversing web of plastic film, said web comprising a pair of parallel proximate plastic film walls; a vertically positioned heat seal bar selectively moveable onto said plastic film web thereby severing said plastic film walls along a vertical separation and thereby creating and fusing a pair of fore bag vertical wall edges to one another and creating and fusing a pair of aft bag vertical wall edges to one another; a vertically positioned perforation knife selectively moveable onto said plastic film web thereby perforating said plastic film walls along a vertical perforation line; and, wherein said heat seal bar is vertically aligned with said perforation knife whereby said vertical separation and said vertical perforation line are vertically aligned.