US3878993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing aluminum pellets
Assignee: Individual
•
Filing: 1973-10-29
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Granted: 1975-04-22
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Expires: 1993-10-29
Abstract
Abstract An improved method for producing aluminum pellets from aluminum chips including the steps of beating the aluminum chips together in a conventional sieve type hammer mill having a perforated drum and removing the resulting finely divided aluminum powder from the hammer mill continuously by means of passing an air current through the drum perforations.
Inventors
- 👤 Matthias Welsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:27
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/04; B02; B02C; B02C13/00; B02C13/13; B02C19/00; B02C19/0056; B22F2009/045; B22F2009/046
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
AN IMPROVED BATCH PROCESS FOR TRANSFORMING ALUMINUM CHIPS INTO ALUMINUM PELLETS OF A DESIRED MINIMUM AND MAXIMUM SIZE COMPRISING THE STEPS OF: INTRODUCING ALUMINUM CHIPS OF A PRESELECTED SIZE INTO A PERFORATED DRUM OF A HAMMER MILL; ACTUATING THE HAMMER MILL AND THEREBY BEATING THE ALUMINUM CHIPS TOGETHER AND COMPACTING SAID CHIPS IN THE HAMMER MILL FOR A DWELL TIME SUFFICIENT TO TRANSFORM SUCH CHIPS INTO IRREGULAR-SHAPED, ROUGH-SURFACED PELLETS AS A MAIN PRODUCT, SAID PELLETS HAVING A DIAMETER IN THE RANGE FROM 1-1O MILLIMETERS, THE MAXIMUM DIAMETER BEING DETERMINED BY THE SIZE OF THE ALUMINUM CHIP AND THE DWELL TIME AND THE MINIMUM DIAMETER BEING DETERMINED BY THE SIZE OF THE PERFORATIONS IN SAID DRUM; CONTINUOUSLY DISCHARGING ANY RESULTING FINELY DIVIDED ALUMI16 NUM POWDER AND PELLETS HAVING A DIAMETER LESS THAN THAT DESIRED FROM THE DRUM AS A BY-PRODUCT; AND REMOVING THE FORMED PELLETS FROM SAID DRUM AT THE END OF SUCH DWELL TIME.
Claim 2
Dependent Claim
154 words
AN IMPROVED BATCH PROCESS FOR TRANSFORMING ALUMINUM CHIPS INTO ALUMINUM PELLETS OF A DESIRED MINIMUM AND MAXIMUM SIZE COMPRISING THE STEPS OF: INTRODUCING ALUMINUM CHIPS OF A PRESELECTED SIZE INTO A PERFORATED DRUM OF A HAMMER MILL; ACTUATING THE HAMMER MILL AND THEREBY BEATING THE ALUMINUM CHIPS TOGETHER AND COMPACTING SAID CHIPS IN THE HAMMER MILL FOR A DWELL TIME SUFFICIENT TO TRANSFORM SUCH CHIPS INTO IRREGULAR-SHAPED, ROUGH-SURFACED PELLETS AS A MAIN PRODUCT, SAID PELLETS HAVING A DIAMETER IN THE RANGE FROM 1-1O MILLIMETERS, THE MAXIMUM DIAMETER BEING DETERMINED BY THE SIZE OF THE ALUMINUM CHIP AND THE DWELL TIME AND THE MINIMUM DIAMETER BEING DETERMINED BY THE SIZE OF THE PERFORATIONS IN SAID DRUM; CONTINUOUSLY DISCHARGING ANY RESULTING FINELY DIVIDED ALUMI16 NUM POWDER AND PELLETS HAVING A DIAMETER LESS THAN THAT DESIRED FROM THE DRUM AS A BY-PRODUCT; AND REMOVING THE FORMED PELLETS FROM SAID DRUM AT THE END OF SUCH DWELL TIME.
Claim 3
Dependent Claim
153 words
An improved batch process for transforming aluminum chips into aluminum pellets of a desired minimum and maximum size comprising the steps of: introducing aluminum chips of a preselected size into a perforated drum of a hammer mill; actuating the hammer mill and thereby beating the aluminum chips together and compacting said chips in the hammer mill for a dwell time sufficient to transform such chips into irregular-shaped, rough-surfaced pellets as a main product, said pellets having a diameter in the range from 1-10 millimeters, the maximum diameter being determined by the size of the aluminum chip and the dwell time and the minimum diameter being determined by the size of the perforations in said drum; continuously discharging any resulting finely divided aluminum powder and pellets having a diameter less than that desired from the drum as a by-product; and removing the formed pellets from said drum at the end of such dwell tIme.
Claim 4
Dependent Claim
153 words
An improved batch process for transforming aluminum chips into aluminum pellets of a desired minimum and maximum size comprising the steps of: introducing aluminum chips of a preselected size into a perforated drum of a hammer mill; actuating the hammer mill and thereby beating the aluminum chips together and compacting said chips in the hammer mill for a dwell time sufficient to transform such chips into irregular-shaped, rough-surfaced pellets as a main product, said pellets having a diameter in the range from 1-10 millimeters, the maximum diameter being determined by the size of the aluminum chip and the dwell time and the minimum diameter being determined by the size of the perforations in said drum; continuously discharging any resulting finely divided aluminum powder and pellets having a diameter less than that desired from the drum as a by-product; and removing the formed pellets from said drum at the end of such dwell tIme.
Claim 5
Dependent Claim
27 words
The improved method of claim 1 including beating the aluminum chips together in the hammer mill for at least 3 minutes but not longer than 5 minutes.
Claim 6
Dependent Claim
22 words
The improved method of claim 1 including continuously discharging the resulting finely divided aluminum powder through the perforations in the perforated drum.
Claim 7
Dependent Claim
25 words
The improved method of claim 3 including continuously discharging the resulting finely divided aluminum powder through the drum perforations by means of an air current.
Claim 8
Dependent Claim
27 words
The improved method of claim 4 including beating the aluminum chips together in the hammer mill for at least 3 minutes but not longer than 5 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |