Patent US3945576A successfully refreshed from Google Patents.
US3945576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stock pulper
Assignee: Sulzer Escher Wyss GmbH
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Filing: 1974-09-05
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Granted: 1976-03-23
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Expires: 1994-09-05
Abstract
Abstract The stock pulper has a container in which the screen has a dimensional component disposed axially of the container to receive an inwardly directed radial flow of the stock suspension. The screen can be cylindrical or conical. Breaker dogs are also fixedly mounted in the container to extend to the ends of the rotor arms.
Inventors
- 👤 Albrecht Kahmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:23
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A stock pulper comprising a container for receiving a stock suspension, said container being in the form of a body of revolution about a horizontal longitudinal axis with an increasing diameter from one end towards an opposite end; a rotor rotatably mounted within said container on said axis at said one end and having a plurality of arms for imparting a rotational and circulatory motion to a stock suspension in said container; a discharge pipe in said container at said opposite end for discharging heavy impurities from the stock suspension during rotation of said rotor; a screen within said container at said one end, said screen having a dimensional component disposed axially of said container to receive an inwardly directed radial flow of the stock suspension and to pass good stock therethrough; and a discharge pipe connected to said container downstream of said screen relative to a flow of the good stock.
Claim 2
Dependent Claim
152 words
A stock pulper comprising a container for receiving a stock suspension, said container being in the form of a body of revolution about a horizontal longitudinal axis with an increasing diameter from one end towards an opposite end; a rotor rotatably mounted within said container on said axis at said one end and having a plurality of arms for imparting a rotational and circulatory motion to a stock suspension in said container; a discharge pipe in said container at said opposite end for discharging heavy impurities from the stock suspension during rotation of said rotor; a screen within said container at said one end, said screen having a dimensional component disposed axially of said container to receive an inwardly directed radial flow of the stock suspension and to pass good stock therethrough; and a discharge pipe connected to said container downstream of said screen relative to a flow of the good stock.
Claim 3
Dependent Claim
14 words
A stock pulper as set forth in claim 1 wherein said screen is cylindrical.
Claim 4
Dependent Claim
14 words
A stock pulper as set forth in claim 1 wherein said screen is conical.
Claim 5
Dependent Claim
23 words
A stock pulper as set forth in claim 3 wherein said conical screen has an apex directed into the interior of said container.
Claim 6
Dependent Claim
32 words
A stock pulper as set forth in claim 1 which further comprises a plurality of breaker dogs fixedly mounted within said container and said arms extend to the vicinity of said dogs.
Claim 7
Dependent Claim
24 words
A stock pulper as set forth in claim 1 wherein said arms are spaced slightly from said screen to define a shearing zone therebetween.
Claim 8
Dependent Claim
124 words
A stock pulper comprising a container for receiving a stock suspension, said container being in the form of a body of revolution about a longitudinal axis; a plurality of breaker dogs fixedly mounted within said container; a rotor rotatably mounted within said container on said axis and having a plurality of arms extending to the vicinity of said dogs for imparting a rotational and circulatory motion to a stock suspension in said container; a screen within said container with a dimensional component disposed axially of said container to receive an inwardly directed radial flow of the stock suspension and to pass good stock therethrough; and a discharge pipe connected to said container downstream of said screen relative to a flow of the good stock.
Claim 9
Dependent Claim
124 words
A stock pulper comprising a container for receiving a stock suspension, said container being in the form of a body of revolution about a longitudinal axis; a plurality of breaker dogs fixedly mounted within said container; a rotor rotatably mounted within said container on said axis and having a plurality of arms extending to the vicinity of said dogs for imparting a rotational and circulatory motion to a stock suspension in said container; a screen within said container with a dimensional component disposed axially of said container to receive an inwardly directed radial flow of the stock suspension and to pass good stock therethrough; and a discharge pipe connected to said container downstream of said screen relative to a flow of the good stock.
Claim 10
Dependent Claim
122 words
A stock pulper comprising a container for receiving a stock suspension, said container being in the form of a body of revolution about a longitudinal axis; a rotor rotatably mounted within said container on said axis and having a plurality of arms for imparting a rotational and circulatory motion to a stock suspension in said container; a screen within said container with a dimensional component disposed axially of said container to receive an inwardly directed radial flow of the stock suspension and to pass good stock therethrough, said screen being spaced slightly from said rotor arms to define a shearing zone therebetween; and a discharging pipe connected to said container downstream of said screen relative to a flow of the good stock.
Claim 11
Dependent Claim
122 words
A stock pulper comprising a container for receiving a stock suspension, said container being in the form of a body of revolution about a longitudinal axis; a rotor rotatably mounted within said container on said axis and having a plurality of arms for imparting a rotational and circulatory motion to a stock suspension in said container; a screen within said container with a dimensional component disposed axially of said container to receive an inwardly directed radial flow of the stock suspension and to pass good stock therethrough, said screen being spaced slightly from said rotor arms to define a shearing zone therebetween; and a discharging pipe connected to said container downstream of said screen relative to a flow of the good stock.
References Cited (Backward Citations)
US2384326A
Cited
GB674373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |