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US 8,734,309 B2Granted
Forming die assembly with enhanced stop
AssigneeDixie Consumer Products LLC
InventorsAlbert D. Johns, Mircea T. Sofronie
Life of this patent
Estimating the term…
Abstract
A die assembly for producing paperboard pressware includes an obliquely angled, continuous ring, and/or annular stop member between an inner die member and an outer die ring. Increased surface area of contact between stop components provides greater wear resistance, and the angled contact face maintains alignment of the die components.
Claims20
A die set for producing paperboard pressware, comprising:
- an inner die member having a concave inner face that is opposite an outer peripheral face having a frusto-conical inclined external face and aligned therewith such that a radial line extending from a central longitudinal axis of the inner die member to the outer peripheral face passes through the concave inner face and the frusto-conical inclined external face;
- and
- an outer die ring surrounding the inner die member, the outer die ring having a frusto-conical inner face,
- wherein the frusto-conical inner face of said outer die ring engages against the frusto-conical inclined external face of said inner die member to limit the travel of the outer die ring relative to the inner die member, and
- wherein the frusto-conical inclined external face of said inner die member and the frusto-conical inner face of said outer die ring are configured to urge said inner die member and said outer die ring toward alignment upon opening of said die set.
2 more elements
A die set for producing paperboard pressware, comprising:
- a first die half comprising an inner die member having a concave inner face that is opposite an outer peripheral face having a frusto-conical external face and aligned therewith such that a radial line extending from a central longitudinal axis of the inner die member to the outer peripheral face passes through the concave inner face and the frusto-conical external face, and an outer die ring surrounding the inner die member, the outer die ring having a frusto-conical inner face, wherein the frusto-conical inner face of the outer die ring engages against the frusto-conical external face of the inner die member to limit the travel of the outer die ring relative to the inner die member, and wherein the frusto-conical external face of the inner die member and the frusto-conical inner face of the outer die ring are configured to urge the inner die member and the outer die ring toward alignment upon opening of said die set;
- and
- a second die half comprising an inner punch having a peripheral face, and a pressure ring surrounding the inner punch, wherein the inner die member of the first die half faces the inner punch to form the die set.
A die set for producing paperboard pressware from a paperboard blank, comprising:
- an inner die ring having a concave inner face that is opposite an outer peripheral face having a frusto-conical external face and aligned therewith such that a radial line extending from a central longitudinal axis of the inner die ring to the outer peripheral face passes through the concave inner face and the frusto-conical external face;
- an outer die ring surrounding the inner die ring, the outer die ring having a frusto-conical inner face, wherein the frusto-conical inner face of the outer die ring engages against the frusto-conical external face of the inner die ring to limit the travel of the outer die ring relative to the inner die ring, and wherein the frusto-conical external face of the inner die ring and the frusto-conical inner face of the outer die ring are configured to urge the inner die ring and the outer die ring toward alignment upon opening of said die set;
- an inner punch disposed adjacent the inner die ring, the inner punch having an outer frusto-conical external face;
- and
- a pressure ring surrounding the inner punch and having a frusto-conical inner face, wherein the frusto-conical inner face of the pressure ring engages against the outer frusto-conical external face of the inner punch to limit the travel of the pressure ring relative to the inner punch.
2 more elements
Dependencies are inferred from the claim text.