US3645200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stock cutter for elastomer drying press
Assignee: EIDP Inc
•
Filing: 1970-02-09
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Granted: 1972-02-29
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Expires: 1990-02-09
Abstract
Abstract In a screw-type drying press for drying elastomeric polymers wherein the elastomer is discharged from the press into a discharge chamber, the elastomer is subdivided into pieces as it leaves the screw press by a stock cutter consisting essentially of (a) a hub rotatably mounted on the axis of the screw press in the discharge chamber immediately adjacent to the exit of the screw press; and (b) at least one blade attached to the outer periphery of the hub positioned at an angle of 1-60* to the rotational axis of the hub with the dependent portion of the blade generally shaped to conform to the shape of the discharge chamber. During rotation the blade subdivides the elastomeric stock, wipes the inside surface of the discharge chamber, and propels the subdivided stock away from the press discharge area. Alternatively, this stock cutter is used in combination with a stationary knife positioned at the exit of the stock cutter particularly when processing elastomeric stocks which have a Mooney viscosity (ML 1+4 (121* C.)) of 10 to 45 when dry.
Inventors
- 👤 Wayne Edward Craddock
- 👤 Stanley George Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:04
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B29B13/00; B29B13/06; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/03; B29C48/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
In a screw-type drying press for drying elastomeric polymers wherein the elastomer is discharged from the press into a discharge chamber, the elastomer is subdivided when it leaves the screw press and enters the discharge chamber by a stock cutter consisting essentially of (a) a hub in the discharge chamber rotatably mounted on the axis of the screw press immediately adjacent to the exit of the screw press; and (b) at least one planar blade attached to the outer periphery of the hub having a leading edge, a trailing edge and a dependent edge wherein the plane of the blade is pitched at an angle of 1* to 60* to the rotational axis of the hub, the leading edge of the blade is perpendicular to the rotational axis of the hub and in the plane defined by the end of the hub nearest the press exit, and the dependent edge of the blade generally conforms to the shape of the discharge chamber so that during rotation of the stock cutter the leading edge of the blade subdivides the elastomeric stock as it is discharged from the press, the dependent edge of the blade wipes the inside surface of the discharge chamber and the pitched blade propels the subdivided stock away from the press discharge area.
Claim 2
Dependent Claim
215 words
In a screw-type drying press for drying elastomeric polymers wherein the elastomer is discharged from the press into a discharge chamber, the elastomer is subdivided when it leaves the screw press and enters the discharge chamber by a stock cutter consisting essentially of (a) a hub in the discharge chamber rotatably mounted on the axis of the screw press immediately adjacent to the exit of the screw press; and (b) at least one planar blade attached to the outer periphery of the hub having a leading edge, a trailing edge and a dependent edge wherein the plane of the blade is pitched at an angle of 1* to 60* to the rotational axis of the hub, the leading edge of the blade is perpendicular to the rotational axis of the hub and in the plane defined by the end of the hub nearest the press exit, and the dependent edge of the blade generally conforms to the shape of the discharge chamber so that during rotation of the stock cutter the leading edge of the blade subdivides the elastomeric stock as it is discharged from the press, the dependent edge of the blade wipes the inside surface of the discharge chamber and the pitched blade propels the subdivided stock away from the press discharge area.
Claim 3
Dependent Claim
37 words
The stock cutter of claim 1 in which the blade is attached to the outer periphery of the hub and is pitched at an angle of about 25* to 40* to the rotational axis of the hub.
Claim 4
Dependent Claim
96 words
The stock cutter of claim 1 in combination with a stationary knife positioned immediately adjacent to the stock cutter exit and projecting into the stock cutter discharge chamber with the side of the knife parallel to the plane defined by the trailing edge of the blade as the blade rotates and the cutting edge of the knife facing in the direction of the oncoming blade during rotation of the blade to address and further subdivide the elastomeric stock which is propelled by the blades out of the stock cutter into the cutting edge of the knife.
Claim 5
Dependent Claim
22 words
The stock cutter of claim 1 in which four major blades are equally spaced circumferentially around the outer periphery of the hub.
Claim 6
Dependent Claim
18 words
The stock cutter of claim 4 in which four minor blades are equally spaced between the major blades.
References Cited (Backward Citations)
US3285163A
Cited
US3225453A
Cited
US3276353A
Cited
US3276354A
Cited
US3382538A
Cited
US3518936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |