Roll-pelletizer and rolls therefor for making uniform particle size pellets
US3947938A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1975 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Mar 20, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A roll pelletizer as disclosed and claimed in U.S. Patent Number 3,561,051 with rolls consisting of a helically wound strip of resilient material having a reduced depth portion along its length providing grooves in adjacent wraps of the strip, the remaining non-reduced depth portion of the strip defining lands. Opposed compressive rolls of this invention are helically wound with opposite hands so that lands of one roll intermesh or mate with grooves of an opposed roll. In preferred forms of this invention, a thin, non-yieldable (generally metal) strip is helically wound on a cylindrical base member with the helically wound resilient strip interposed between adjacent wraps thereof. The non-yieldable strip may include right angle tabs spaced at intervals along the length thereof which mate with spaces provided therefor in the grooved portions of the resilient strip. Uniform particle size or predetermined length pellets, of material such as synthetic aggregate made from a formable cementitious material, are manufactured by passing such material through mating helically wound rolls with such right angle tabs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.