Knife having beam elements
AssigneeThe Procter & Gamble Company
InventorsDale Francis Bittner, Howard Jay Kalnitz, Stephen Douglas Congleton, Christopher Robert Lyman
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Abstract
A knife including a cutting edge, a fixed edge, and a plurality of beam elements connecting the cutting edge to the fixed edge, each of the beam elements having a beam element extent oriented between about 20 degrees and about 80 degrees off of the cutting edge, each beam element separated from adjacent beam elements by a reduced stiffness zone, each reduced stiffness zone having a reduced stiffness zone extent oriented from about 20 degrees to about 80 degrees off of the cutting edge. The knife can be employed in a process and an apparatus for cutting a web.
Claims11
A process of cutting a web comprising steps of:
- providing a web;
- providing a knife mounted on a press, wherein said knife comprises:
- a cutting edge;
- a fixed edge;
- and
- a plurality of beam elements connecting said cutting edge to said fixed edge, each of said beam elements having a beam element extent oriented between 20 degrees and 80 degrees off of said cutting edge, each said beam element separated from adjacent beam elements by a reduced stiffness zone, each reduced stiffness zone having a reduced stiffness zone extent oriented from 20 degrees to 80 degrees off of said cutting edge, wherein each of said beam elements has a beam element width orthogonal to said beam element extent and a beam element length in line with said beam element extent, wherein each of said beam elements has a ratio of beam element length to beam element width from 2 to 40;
- providing an anvil supporting said web as said web passes between said anvil and said press;
- and
- cutting said web with said knife as said web passes between said press and said anvil.
An apparatus for cutting a web comprising:
- a rotary press having a machine direction and a cross direction orthogonal to said machine direction;
- a rotary anvil;
- and
- a knife comprising:
- a cutting edge;
- a fixed edge;
- and
- a plurality of beam elements connecting said cutting edge to said fixed edge, each of said beam elements having a beam element extent oriented from 20 degrees to 80 degrees off of said cutting edge, each said beam element separated from adjacent beam elements by a reduced stiffness zone, each reduced stiffness zone having a reduced stiffness zone extent oriented from 20 degrees to 80 degrees off of said cutting edge,
- wherein each of said beam elements has a beam element width orthogonal to said beam element extent and a beam element length in line with said beam element extent, wherein each of said beam elements has a ratio of beam element length to beam element width from 2 to 40, and
- wherein said knife is mounted to said rotary press with said cutting edge oriented in said cross direction.
Dependencies are inferred from the claim text.