US 6,968,769 B2 · Die assembly

Abstract

A die assembly including a first die with a first die surface and a first cutting rib extending from the first die surface. The first cutting rib includes a first cutting surface parallel to the first die surface. The first cutting rib includes a leg extending from the first die surface to the first cutting surface at a first obtuse angle. A second die includes a second die surface and a second cutting rib extending from the second die surface. The second cutting rib includes a second cutting surface parallel to the second die surface. The second cutting surface is generally parallel to and defines a cutting overlap with the first cutting surface at a cross-section taken through the first and second dies in a cutting position. The cutting rib includes a leg extending from the second die surface to the second cutting surface at a second obtuse angle.

Claims15

Dependent claims

A die assembly for cutting a sheet material comprising:

a first die including a first die surface and a first cutting rib extending from the first die surface, the first cutting rib including a first cutting surface that is generally parallel to the first die surface, the first cutting rib including at least one leg extending from the first die surface to the first cutting surface at a first obtuse angle relative to the first die surface;
and
a second die including a second die surface and a second cutting rib extending from the second die surface, the second cutting rib including a second cutting surface that is generally parallel to the second die surface, the second cutting surface being generally parallel to and defining a cutting overlap with the first cutting surface at a cross section taken through the first and second dies in a cutting position, the second cutting rib including at least one leg extending from the second die surface to the second cutting surface at a second obtuse angle relative to the second die surface.

A die assembly for cutting a sheet material into a container blank including a hole within the container blank and recites, as follows:

a first die including a first die surface, a first peripheral chopping rib and a first endless rib extending from the first die surface, the first endless rib defining a first closed area on the first die surface;
at least one first land extending from the first die surface within the first closed area, the first land being separated from the first endless rib;
a second die including a second die surface, a second peripheral chopping rib and a second endless rib extending from the second die surface, the second endless rib defining a second closed area on the second die surface, the first and second peripheral chopping ribs making a peripheral cut of the container blank;
and
at least one second land extending from the second die surface within the second closed area, the second land being separated from the second endless rib.

2 more elements

Dependencies are inferred from the claim text.

Die assembly

Life of this patent

Die assembly

Life of this patent

Abstract

Claims15