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US3593378A Expired / Lapsed US ⏱️ 0.0 years remaining

Briquetting press

Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1968-09-03
•
Granted: 1971-07-20
•
Expires: 1988-09-03
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Abstract

Abstract A roll-type press for compressing particulate metal powders, especially ferrous metal powders such as produced in direct iron ore reduction processes, to provide series, or strings, of readily separable briquettes as articles of manufacture. The mold pockets in the faces of the two cooperating rolls are so arranged that they partially overlap as the pockets of one roll come into contact with the pockets of the other. The overlapping section, or junctures, of the compacted briquettes are less densely compacted than those conventionally produced so that the individual briquettes of the issuing series can be readily broken apart. Moreover, forces are generated which aid in the release of the briquettes from the mold pockets.

Inventors

  • 👤 William J Metrailer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 21:53
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/16; B22; B22F; B22F3/00; B22F3/02; B22F3/03; B22F3/18

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 16 words
The apparatus of claim 1 wherein the overlap ranges from about 5 to about 15 percent.
Claim 2
Dependent Claim 35 words
The apparatus of claim 1 wherein the edges of the rolls, between the separated mold pockets, are provided with projecting surfaces which extend into the pockets of the opposite roll as the rolls are rotated.
Claim 3
Dependent Claim 51 words
The apparatus of claim 3 wherein the projections range in height from about one-fourth to about one-half as high as the pockets of the opposite roll are deep, as wide as from about one-fourth to about one-half as wide as said pockets, and from about three-fourths to about seven-eights as long.

References Cited (Backward Citations)

US874167A Cited
DE1036738B Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-07-19 1975-01-18 1975-07-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-07-19 1979-01-18 1979-07-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-07-19 1983-01-18 1983-07-20 $7700.00 Window Closed / Lapsed

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