US3986676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for disintegrating material such as paper
Assignee: Individual
•
Filing: 1975-07-07
•
Granted: 1976-10-19
•
Expires: 1995-07-07
Abstract
Abstract A device for disintegrating material such as paper comprising a motor-driven disintegrating assembly disposed in the lower part of a feed chute, the disintegrating assembly having a plurality of knives fixed in mutually overlying relationship on a working shaft. The lower end of the feed chute is formed as a screening drum disposed coaxial to the working shaft and is surrounded by a paper discharge air duct, that portion of the working shaft located in the screening drum being provided with blower vanes and at least one additional knife.
Inventors
- 👤 Gerhard Husmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/08; D21B1/10; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A device for disintegrating material such as paper, comprising: a feed chute; a motor-driven disintegrating assembly disposed in a lower part of said feed chute, said disintegrating assembly including a working shaft and a plurality of knives fixed in mutually overlying relationship on said working shaft, said lower end of said feed chute being in the form of a screening drum disposed coaxial to said working shaft; and a paper discharge air duct surrounding said screening drum, said working shaft having a portion located in said screening drum, and blower vanes and at least one additional knife disposed on said portion of said working shaft.
Claim 2
Independent Claim
105 words
A device for disintegrating material such as paper, comprising: a feed chute; a motor-driven disintegrating assembly disposed in a lower part of said feed chute, said disintegrating assembly including a working shaft and a plurality of knives fixed in mutually overlying relationship on said working shaft, said lower end of said feed chute being in the form of a screening drum disposed coaxial to said working shaft; and a paper discharge air duct surrounding said screening drum, said working shaft having a portion located in said screening drum, and blower vanes and at least one additional knife disposed on said portion of said working shaft.
Claim 3
Dependent Claim
64 words
The device as recited in claim 1, wherein said plurality of overlying knives includes an uppermost knife in the form of agitating arms, an intermediate knife being of disc form with substantially radial slits and axially protruding cutting edges, and a lowermost knife of similar form to said intermediate knife and having a diameter which corresponds to an inner diameter of said screening drum.
Claim 4
Dependent Claim
25 words
The device as recited in claim 1, wherein the height of said blower vanes is approximately equal to an interior height of said screening drum.
Claim 5
Dependent Claim
44 words
The device as recited in claim 1, wherein said screening drum has a floor and said at least one of said additional knife rotating in said screening drum and in a cutting plane which is substantially parallel to said floor of said screening drum.
Claim 6
Dependent Claim
49 words
The device as recited in claim 1 further comprising a holding ring operatively connected to said air duct, the latter discharging into said holding ring, a shredded paper collection bag being attached to a lower part of said holding ring, and an air filter bag attached to said ring.
Claim 7
Dependent Claim
76 words
The device as recited in claim 1, wherein said screening drum has a floor in the form of a disc projecting radially from said rotating with said working shaft, and extending through a zone enclosed by said screening drum and into said paper discharge air duct, at least one knife vane means on said disc for sweeping the outer surface of said screening drum and at least partly filling the free space in said air duct.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |