Abstract 1. In the molding of a plastic container by forming a softened sheet of said plastic between a pair of mold parts, an improved molding operation for forming a latch opening in said container, said improvement comprising: (a) stretching said plastic sheet over a die surface arranged on one of said mold parts in the region of said latch opening; (b) pressing a former through said stretched plastic and into contact with said die surface to cut through said plastic along one edge of said latch opening as said mold parts close; (c) scraping said former along said die surface away from said cut int the region of said latch opening while said mold parts close further; (d) pushing said plastic across said scraped region away from said cut and into a compressed wall of said plastic having an edge spaced from said cut to form said opening; and (e) tearing said plastic along each side edge of said latch opening as said plastic is pushed across said scraped region by said former.
In the molding of a plastic container by forming a softened sheet of said plastic between a pair of mold parts, an improved molding operation for forming a latch opening in said container, said improvement comprising: (a) stretching said plastic sheet over a die surface arranged on one of said mold parts in the region of said latch opening; (b) pressing a former through said stretched plastic and into contact with said die surface to cut through said plastic along one edge of said latch opening as said mold parts close; (c) scraping said former along said die surface away from said cut int the region of said latch opening while said mold parts close further; (d) pushing said plastic across said scraped region away from said cut and into a compressed wall of said plastic having an edge spaced from said cut to form said opening; and (e) tearing said plastic along each side edge of said latch opening as said plastic is pushed across said scraped region by said former.
Claim 2
Dependent Claim
172 words
In the molding of a plastic container by forming a softened sheet of said plastic between a pair of mold parts, an improved molding operation for forming a latch opening in said container, said improvement comprising: (a) stretching said plastic sheet over a die surface arranged on one of said mold parts in the region of said latch opening; (b) pressing a former through said stretched plastic and into contact with said die surface to cut through said plastic along one edge of said latch opening as said mold parts close; (c) scraping said former along said die surface away from said cut int the region of said latch opening while said mold parts close further; (d) pushing said plastic across said scraped region away from said cut and into a compressed wall of said plastic having an edge spaced from said cut to form said opening; and (e) tearing said plastic along each side edge of said latch opening as said plastic is pushed across said scraped region by said former.