US3791802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Briquetting apparatus
Assignee: Inland Steel Co
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Filing: 1972-03-27
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Granted: 1974-02-12
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Expires: 1992-03-27
Abstract
Abstract Material to be briquetted is first fed through precompacting rolls to form a precompacted strip of material guided by a pair of endless belts to the nip of briquetting rolls mating to form a line of briquetting pockets. Resulting briquettes have uniform density regardless of the pocket in which they were formed.
Inventors
- 👤 M Holowaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/16; B30B15/00; B30B15/30; B30B15/302; B30B15/308; B29; B29B; B29B9/00; B29B9/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
42 words
A briquetting apparatus as recited in claim 1 and comprising: guide means, located between said precompacting rolls and said briquetting rolls, for preventing said strip of material from folding on itself as it moves between the precompacting rolls and the briquetting rolls.
Claim 2
Dependent Claim
34 words
A briquetting apparatus as recited in claim 2 wherein said guide means comprises: a pair of moving, endless belt means, with one belt means on each side of said strip and in contact therewith.
Claim 3
Dependent Claim
34 words
A briquetting apparatus as recited in claim 3 wherein: said pair of belt means converge toward each other from said precompacting rolls toward said briquetting rolls to impart an additional compaction to said strip.
Claim 4
Dependent Claim
81 words
A briquetting apparatus as recited in claim 3 and comprising: means for rotating said briquetting rolls at a predetermined speed; means for rotating said precompacting rolls so that a point on the circumference of a precompacting roll moves at the same speed as a point on the cirfumference of a briquetting roll; and means for moving each of said belt means so that a point on a belt means moves at the same speed as said point on said precompacting roll.
Claim 5
Dependent Claim
52 words
A briquetting apparatus as recited in claim 3 and comprising: means for controlling the speed of said belt means, relative to the speed of rotation of both of said pairs of rolls, to prevent said strip of material from tearing or backing up as it moves between the two pairs of rolls.
Claim 6
Dependent Claim
72 words
A briquetting apparatus as recited in claim 3 wherein: said precompacting rolls comprise means for preforming said strip of material to provide a horizontal cross-section on said strip corresponding substantially to the shape of said line of pockets; and said belt means comprises means on each belt cooperating to define a space therebetween having a shape, in horizontal cross-section, corresponding to the horizontal cross-section of said strip provided by said precompacting rolls.
Claim 7
Dependent Claim
24 words
A briquetting apparatus as recited in claim 7 wherein: said briquetting rolls include means for imparting additional compaction to said material from said strip.
Claim 8
Dependent Claim
63 words
A briquetting apparatus as recited in claim 3 and comprising: means for applying to opposite surfaces of said strip of material, at said belt means, a substance for facilitating separation of said strip from said belt means, as the strip leaves the belt means, and for facilitating separation of said material from said briquetting rolls after the material has been compacted into briquettes.
Claim 9
Dependent Claim
24 words
A briquetting apparatus as recited in claim 1 wherein: said briquetting rolls include means for imparting additional compaction to said material from said strip.
Claim 10
Dependent Claim
41 words
A briquetting apparatus as recited in claim 10 wherein: said precompacting rolls comprise means for providing said strip of material with a thickness at least 10 percent wider than the largest transverse dimension of any pocket in said line of pockets.
Claim 11
Dependent Claim
38 words
A briquetting apparatus as recited in claim 10 wherein: said precompacting rolls comprise means for preforming said strip of material to provide a horizontal cross-section on said strip corresponding substantially to the shape of said line of pockets.
Claim 12
Dependent Claim
46 words
A briquetting apparatus as recited in claim 12 wherein: said precompacting rolls comprise means for providing said strip of material with a thickness, along any part thereof, at least 10 percent wider than the transverse dimension of a corresponding pocket part on said line of pockets.
Claim 13
Dependent Claim
53 words
A briquetting apparatus as recited in claim 1 and comprising: means for rotating said briquetting rolls at a predetermined speed; and meAns for rotating said precompacting rolls so that a point on the circumference of a precompacting roll moves at the same speed as a point on the circumference of a briquetting roll.
Claim 14
Dependent Claim
36 words
A briquetting apparatus as recited in claim 1 wherein: said precompacting rolls have a diameter substantially larger than the diameter of said briquetting rolls and a width no greater than the width of the briquetting rolls.
Claim 15
Dependent Claim
23 words
A briquetting apparatus as recited in claim 15 wherein: The ratio of diameters of said precompacting rolls to said briquetting rolls is (3.6-6)/(2-3).
Claim 16
Dependent Claim
53 words
A briquetting apparatus as recited in claim 15 and comprising: means for rotating said briquetting rolls at a predetermined speed; and means for rotating said precompacting rolls so that a point on the circumference of a precompacting roll moves at the same speed as a point on the circumference of a briquetting roll.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |