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US 7,452,200 B2Granted
Briquetting die for dispersible fiber briquettes
AssigneeWeyerhaeuser Company
InventorsMike W. McCaw, Roman T. Dec
Life of this patent
Estimating the term…
Abstract
A briquetting die set comprises first and second mating cylindrical dies. The first die has a plurality of adjacent recesses surrounded by a wall having an upper rim. At least a portion of the upper rim of each recess is common to an adjacent recess and has a relatively small radius of curvature. The second mating die has mirror image recesses thereon. When the first and second dies are brought into mating relationship, the upper rims of the first and second plurality of recesses mate with each other in substantially line contact to form a briquetting cavity.
Claims7
A briquetting die set comprising:
- a first die having a first plurality of adjacent recesses therein, each of said recesses being surrounded by a wall having an upper rim, at least a portion of each upper rim being common to an adjacent recess and having a radius of curvature, and
- a second mating die having a second plurality of recesses therein being a mirror image of the recesses in said first die, each of said second plurality of recesses having an upper rim, at least a portion of each upper rim of said second plurality of recesses being common to an adjacent recess and having a radius of curvature, said upper rims of said first and second plurality of recesses mating with each other in substantially line contact as said first and second dies are brought into mating relationship.
Dependencies are inferred from the claim text.