US3643797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trash-separating apparatus and method
Assignee: Dickson Paper Fibre Inc
•
Filing: 1969-07-31
•
Granted: 1972-02-22
•
Expires: 1989-07-31
Abstract
Abstract A system is provided for reclaiming usable paper other selected materials from a heterogeneous trash mixture that has previously been shredded to a predetermined size. The trash is deposited on a sloped vibrating screen which permits the passage therethrough of smaller sized trash particles. These particles then pass onto another sloped vibrating screen whereby minutely sized particles may pass therethrough, to be discarded. The smaller sized particles that pass through the first screen, but not the second then enter a chute which has a cross current in the form of an air stream, whereby paper, light sheet plastic and the like are forced from the smaller sized mixture and are delivered onto a conveyor. The larger sized particles that do not pass through the first vibrating screen are delivered onto a trash wheel, which is rotating, and which throws the larger sized particles in a given direction whereby the particles travel a given distance depending upon their weight, or upon their ability to be thrown, with at least the heavier of these larger particles passing through an air screen directed toward a series of bins. The lighter of these larger particles are collected in a bin which is located most closely to the trash wheel, which bin deposits these lighter particles onto the conveyor. Trash which is thrown into an intermediate bin is deposited onto another sloped vibrating screen, whereby larger paper materials are separated from smaller but heavier trash components such as heavier plastics, with the thus separated paper materials also passing onto the conveyor. The conveyor then passes beneath an extractor which removes sheet plastic films and the like therefrom, preferably by means of electrostatic attraction of the plastic films from the paper materials, resulting in paper reclamation having an acceptable minimum percentage (if any) of nonpaper materials therein.
Inventors
- 👤 Lawrence Berkowitz
- 👤 Georgs Novickis
- 👤 Prafulchandra N Sheth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:27
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B4/025; B03; B03B; B03B7/00; B03B9/00; B03B9/06; B03B9/061; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/52; Y02W30/62; Y10; Y10S; Y10S209/00; Y10S209/93
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
65 words
Apparatus for reclaiming selected materials from mixed shredded trash comprising first means for receiving mixed shredded trash and classifying the trash by size into differently sized components, second means for concurrently and separately classifying by weight trash of each selected size received from said first means, and third means for extracting sheet plastics and the like from lighter trash components delivered from said second means.
Claim 2
Dependent Claim
31 words
The apparatus of claim 1, wherein said first means includes at least a first grid of preselected size with means for vibrating said grid for passage of selectively sized materials therethrough.
Claim 3
Dependent Claim
30 words
The apparatus of claim 2, wherein a secondary grid of smaller size than said first grid is provided, with vibrating means therefor, for passage of minute undesirably sized components therethrough.
Claim 4
Dependent Claim
18 words
The apparatus of claim 2, including ramp means for delivering size-classified trash components to said second classifying means.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1, wherein said second classifying means includes means for directing a stream of air, and means for delivering size-classified trash components past the air stream.
Claim 6
Dependent Claim
67 words
The apparatus of claim 5, wherein a substantially vertical chute is provided as said delivering means, including ramp means for directing the size-classified trash components to said chute, with said means for directing a stream of air being mounted for passing air substantially horizontally across the chute, including secondary chute means for receiving from the vertical chute lighter trash components directed thereto by the stream of air.
Claim 7
Dependent Claim
56 words
The apparatus of claim 1, wherein said second classifying means includes a plurality of bins and means for throwing size-classified trash components into said bins, said bins being disposed at various distances from said throwing means, whereby size-classified trash is substantially classified by weight depending upon the distance such trash is thrown by said throwing means.
Claim 8
Dependent Claim
31 words
The apparatus of claim 7, wherein said throwing means comprises a wheellike member having radial portions extending outwardly therefrom, and including means for rotating said wheellike member at a predetermined speed.
Claim 9
Dependent Claim
27 words
The apparatus of claim 7, including means for directing a stream of air substantially transversely to the path of travel of trash thrown from said throwing means.
Claim 10
Dependent Claim
124 words
Apparatus for reclaiming selected materials from mixed shredded trash comprising first means for receiving mixed shredded trash and classifying the trash by size into differently sized components, second means for classifying by weight trash of a selected size received from said first means and third means for extracting sheet plastics and the like from lighter trash components delivered from said second means, wherein said second classifying means includes a plurality of bins and means for throwing size-classified trash components into said bins, said bins being disposed at Various distances from said throwing means, whereby size-classified trash is substantially classified by weight depending upon the distance such trash is thrown by said throwing means, including means for size-classifying weight-classified trash from one of said bins.
Claim 11
Dependent Claim
19 words
The apparatus of claim 10, including single conveyor means for delivering all lighter weight-classified trash to said extracting means.
Claim 12
Dependent Claim
182 words
Apparatus for reclaiming selected materials from mixed shredded trash comprising a first stage for receiving the mixed shredded trash and including a ramp having a grid surface thereon, with means for vibrating the ramp with larger particles being delivered down the ramp to a second stage and with smaller particles passing through the grid and being delivered to a substantially vertical duct, a duct for receiving smaller particles thus delivered, means for directing a stream of air across said duct and directing lighter particles in the duct into a separate zone for delivery onto a conveyor, a second stage comprising at least three serially disposed bins and rotatable throwing device for receiving the larger particles from said first stage and throwing the particles into one of the bins, and means for directing a stream of air across the path of travel of at least some of the particles thrown by said throwing device, means delivering particles from the bin located nearest said throwing device to said conveyor, and means for extracting sheet plastics and the like from particles carried on said conveyor.
Claim 13
Dependent Claim
17 words
The apparatus of claim 12, wherein means are provided for adjusting the particle inlets to said bins.
Claim 14
Dependent Claim
38 words
The apparatus of claim 12, including vibrating ramp means having a selected grid surface thereon for receiving particles from one said bin, classifying these particles by size and delivering selectively sized ones of these particles onto said conveyor.
Claim 15
Dependent Claim
38 words
The apparatus of claim 12, including in said first stage a second ramp having a second grid thereon, and means for vibrating said second grid and separating minute particles from smaller particles which pass through said other grid.
Claim 16
Dependent Claim
55 words
The apparatus of claim 12, wherein said extracting means includes means for brushing through a combination of paper and soft plastic materials carried on said conveyor, comb means disposed for removing from said brushing means plastic materials extracted from the conveyor by said brushing means, and exhaust means for carrying away plastic materials thus removed.
Claim 17
Dependent Claim
73 words
The apparatus of claim 12, wherein at least two said extracting means are serially disposed on said conveyor, and including means disposed between said extracting means for receiving paper materials that a first one of said brushing means has brushed through, and directing these paper materials to a downstream location on said conveyor relative to the second or downstreammost one of said extracting means, in bypass relation relative to said second extracting means.
Claim 18
Independent Claim
84 words
A method of reclaiming paper materials from mixed shredded trash comprising the steps of classifying the trash by size into larger and smaller sized particles, classifying the smaller sized particles by weight to remove lighter paperlike and plastic film particles therefrom, classifying the larger sized particles by weight to remove the lighter paperlike and plastic film particles therefrom, directing both groups of lighter particles through an extraction device, and extracting plastic film and the like from the lighter particles to yield lighter paper materials.
Claim 19
Dependent Claim
21 words
The process of claim 18, wherein the size classification step includes the step of screening the trash while vibrating the same.
Claim 20
Dependent Claim
38 words
The process of claim 18, wherein the step of weight classifying the smaller size-classified particles includes the step of directing the smaller size-classified particles past an airstream which directs the lighter of the particles into a predetermined zone.
Claim 21
Dependent Claim
69 words
The process of claim 18, wherein the step of weight classifying the larger sized size-classified particles includes the step of throwing these particles in a predetermined direction across inlets to variously located bins, while directing pressurized air across paths of at least some of the thrown particles to separate the particles into bins according to the ability of the particles to be thrown predetermined distances defined by bin locations.
Claim 22
Dependent Claim
21 words
The process of claim 18, wherein the extracting step includes the step of electrostatically attracting plastic film from the lighter particles.
References Cited (Backward Citations)
US14917A
Cited
US455802A
Cited
US974395A
Cited
US1142706A
Cited
US1290895A
Cited
US2275770A
Cited
US2317210A
Cited
US2786636A
Cited
US3143492A
Cited
US3341008A
Cited
US3384233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |