Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1991-06-19
1994-11-15
Robinson, Ellis P.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428 3690, 215 1C, 47 66, 220306, 220366, 220367, 220659, 264527, 264531, 425525, B65D 146, B65D 5116
Patent
active
053646754
ABSTRACT:
The present invention is drawn to a blow molded article having a deep recessed lip wherein the lip includes a folded reinforcing layer adjacent a hollow U-shaped portion. The reinforcing layer is formed by the parison folding over on itself in the mold while forming the U-shaped lip. The folded portions are pinched together within the mold and are welded to one another. At various portions around the circumference of the lip, vents are inserted to relieve the pressure within the lip during release of the internal pressure within the molded article.
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Peters, et al., "High Molecular Weight High Density Polyethlene Powder for Extrusion Blow Molding of Drums and Other Large Parts", 1984.
Guarriello Henry J.
Guarriello Joseph A.
Guarriello Theodore J.
Dye Rena L.
Robinson Ellis P.
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