US3859407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing particles of uniform size and shape
Assignee: Corning Glass Works
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Filing: 1972-05-15
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Granted: 1975-01-07
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Expires: 1992-05-15
Abstract
Abstract Plastically formable material, which may be formed under pressure into desired shapes, is fed while in a fluid or plastically formable condition to a pair of cooperating surfaces which are relatively movable into compressive relationship with material disposed therebetween. The face of at least one of such surfaces is patterned with a plurality of juxtapositioned geometrical impressions of desired size and shape so as to form a ribbon or sheet of uniformly sized and shaped particles from the plastically formable material supplied to the cooperating surfaces. The uniform particles are initially joined together by thin web or edge portions which maintain the continuity of the newly formed particles within a sheet form. However, after the ribbon of newly formed particles has become sufficiently rigid, such as through the cooling of a molten thermoplastic material or the drying or firing of a green ceramic material from which such ribbon may be formed, the ribbon may then be flexed in various directions to separate the particles along the edge or web portions, thus providing a plurality of individual particles having substantially uniform size and shape.
Inventors
- 👤 Wendell S Blanding
- 👤 Jack A Brothers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:37
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/085; B; B01; B01J; B01J2/00; B01J2/22; B28; B28B; B28B1/00; B28B1/004; B28B3/00; B28B3/12; B28B3/14; B29; B29B; B29B9/00; B29B9/02; B29B9/04; C; C03; C03B; C03B11/00; C03B11/06; C03B11/08; C03B11/082; C03B13/00; C03B13/08; C03B19/00; C03B19/10; C03B19/1005; C03B19/1035; C03B19/104; C03B2215/00; C03B2215/40; C03B2215/41; C03B2215/412; C03B2215/414
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A METHOD OF CONTINUOUSLY FORMING PARTICLES OF UNIFORM SIZE AND SHAPE FROM FLOWABLE BATCH MATERIAL WHICH COMPRISES: A. PROVIDING A PAIR OF COOPERATING FORMING ROLLERS, B. PROVIDING A PATTERNED SURFACE HAVING PLURALITY OF INDIVIDUAL UNIFORM RECESSES OF DESIRED SIZE AND SHAPE ACROSS AND ABOUT AN OPERATING SURFACE OF AT LEAST ONE OF SAID COOPERATIONG ROLLERS, C. SUPPLYING A FLOW OF SAID FLOWABLE BATCH MATERIAL TO THE BITE OF SAID COOPERATING ROLLERS, D. ROLL-FORMING BETWEEN SAID PAIR OF COOPERATING ROLLERS A LONGITUDINALLY CONTINUOUS RIBBON OF PARTICLES OF UNIFORM SIZE AND SHAPE CONNECTED TOGETHER ALONG ADJACENT EDGE PORTIONS BY A WEB PORTION EXTENDING THE WIDTH OF SAID PATTERNED SURFACE, AND
Claim 2
Independent Claim
108 words
A METHOD OF CONTINUOUSLY FORMING PARTICLES OF UNIFORM SIZE AND SHAPE FROM FLOWABLE BATCH MATERIAL WHICH COMPRISES: A. PROVIDING A PAIR OF COOPERATING FORMING ROLLERS, B. PROVIDING A PATTERNED SURFACE HAVING PLURALITY OF INDIVIDUAL UNIFORM RECESSES OF DESIRED SIZE AND SHAPE ACROSS AND ABOUT AN OPERATING SURFACE OF AT LEAST ONE OF SAID COOPERATIONG ROLLERS, C. SUPPLYING A FLOW OF SAID FLOWABLE BATCH MATERIAL TO THE BITE OF SAID COOPERATING ROLLERS, D. ROLL-FORMING BETWEEN SAID PAIR OF COOPERATING ROLLERS A LONGITUDINALLY CONTINUOUS RIBBON OF PARTICLES OF UNIFORM SIZE AND SHAPE CONNECTED TOGETHER ALONG ADJACENT EDGE PORTIONS BY A WEB PORTION EXTENDING THE WIDTH OF SAID PATTERNED SURFACE, AND
Claim 3
Independent Claim
194 words
A method of continuously forming uniform abrasive grains of desired size and shape from flowable thermoplastic vitreous or thermosetting ceramic material comprising: a. providing a pair of cooperating forming rollers rotatable about parallel longitudinal axes, b. providing patterned particle-forming surface portions on opposed surfaces of said forming rollers, c. supplying a flow of said material to the bite of said cooperating rollers, d. synchronizing said pair of cooperating rollers so that opposed patterned surface portions cooperate with one another, e. roll-forming between said cooperating rollers a longitudinally continuous ribbon of a plurality of adjacent particles connected together by means of a continuous connecting thin web portion extending across the width of the patterned surface portions and having opposed apexes which extend outwardly from opposite sides of the ribbon such that the plane of said web portion perpendicularly bisects an axis extending between a pair of opposed apexes, and f. flexing said ribbon between a pair of off-set rolls in various directions out of the plane of the ribbon to separate the newly formed abrasive particles therefrom along adjacent edge portions into individual particles of desired uniform size and shape for use as abrasive grains.
Claim 4
Independent Claim
194 words
A method of continuously forming uniform abrasive grains of desired size and shape from flowable thermoplastic vitreous or thermosetting ceramic material comprising: a. providing a pair of cooperating forming rollers rotatable about parallel longitudinal axes, b. providing patterned particle-forming surface portions on opposed surfaces of said forming rollers, c. supplying a flow of said material to the bite of said cooperating rollers, d. synchronizing said pair of cooperating rollers so that opposed patterned surface portions cooperate with one another, e. roll-forming between said cooperating rollers a longitudinally continuous ribbon of a plurality of adjacent particles connected together by means of a continuous connecting thin web portion extending across the width of the patterned surface portions and having opposed apexes which extend outwardly from opposite sides of the ribbon such that the plane of said web portion perpendicularly bisects an axis extending between a pair of opposed apexes, and f. flexing said ribbon between a pair of off-set rolls in various directions out of the plane of the ribbon to separate the newly formed abrasive particles therefrom along adjacent edge portions into individual particles of desired uniform size and shape for use as abrasive grains.
Claim 5
Independent Claim
148 words
A method of continuously forming uniform abrasive grains of desired size and shape from flowable siliceous material comprising: a. providing a pair of cooperating forming rollers rotatable about parallel longitudinal axes, b. providing patterned particle-forming surface portions on opposed surfaces of said forming rollers, c. supplying a flow of siliceous material to the bite of said cooperating rollers, d. roll-forming between said cooperating rollers a longitudinally continuous ribbon of particles of uniform size and shape connected together along adjacent edge portions by interconnected web portions, e. metallizing said particles of siliceous material while in said ribbon form to form cermet abrasive grains, and f. flexing said ribbon of abrasive grains between a pair of off-set rolls in various directions out of the plane of the ribbon to separate the newly formed abrasive grains therefrom along adjacent edge portions into indivIdual abrasive particles of desired uniform size and shape.
Claim 6
Independent Claim
148 words
A method of continuously forming uniform abrasive grains of desired size and shape from flowable siliceous material comprising: a. providing a pair of cooperating forming rollers rotatable about parallel longitudinal axes, b. providing patterned particle-forming surface portions on opposed surfaces of said forming rollers, c. supplying a flow of siliceous material to the bite of said cooperating rollers, d. roll-forming between said cooperating rollers a longitudinally continuous ribbon of particles of uniform size and shape connected together along adjacent edge portions by interconnected web portions, e. metallizing said particles of siliceous material while in said ribbon form to form cermet abrasive grains, and f. flexing said ribbon of abrasive grains between a pair of off-set rolls in various directions out of the plane of the ribbon to separate the newly formed abrasive grains therefrom along adjacent edge portions into indivIdual abrasive particles of desired uniform size and shape.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |