Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7328808 | Apparatus for sorting wood chips in separate fractions The invention relates to an apparatus for sorting wood chips, said apparatus having a feeder for supplying the wood chips onto a sloping support surface so that the chips slide along the support surface and over a slit extending across the support surface. A flow of... | 02/12/2008 |
| 7267233 | In-line classifier for powdered products A classifier for classifying particulates entrained in a flowing stream of gas is configured such that a change of direction of gas flow causes particles to impinge upon a target, heavier particles being trapped in a downwardly extending fluidized trap. The classifi... | 09/11/2007 |
| 7237680 | Air separator and splitter plate system and method of separating garbage An air separator system for separating shredded trash into relatively light material and relatively heavy material. An air stream is provided at an end of a conveyor. A splitter plate system comprises a rotating cylinder supported by a frame, and a splitter curtain ... | 07/03/2007 |
| 7090082 | Method and device for separating materials A method for separating materials, in which a mixture of materials is guided through a channel in a direction of flow that extends at least approximately parallel to the gravitational field. Utilizing a wash fluid conveyed through the channel in a direction transver... | 08/15/2006 |
| 6957740 | Cyclone separator with central built-in element A cyclone separator (1) has a vertically extending housing (2) with an upper housing segment (3). A separator (6) with a separator wheel is located in the upper housing segment along with a carrier gas/product inlet (7), and a carr... | 10/25/2005 |
| 6910585 | Dynamic centrifugal gas classifier and method of classifying performed therewith An apparatus and process for classifying fine particles from a particulate material, such as toner and pigment powders. The apparatus is generally a dynamic centrifugal gas (air) classifier that combines the operational advantages of centrifugal air classifiers with... | 06/28/2005 |
| 6405405 | Product cleaner with air flow control The present invention provides a vertical drop, multi-pass product cleaner with air flow control on the outlet side of the cleaner, wherein the air flow control includes dampers movable between open and constricted positions disposed within at least one o... | 06/18/2002 |
| 6089378 | Device and process for separating impurities from textile fibers in pneumatic transport lines A device and process for separating impurities from textile fibers during horizontal pneumatic transport is provided. The device includes a hollow parallelepiped separator of rectangular cross-section for the passage of transport fluids, such as air, ther... | 07/18/2000 |
| 5941768 | Corn cob collecting apparatus for use with a combine A corn cob collection apparatus is described which may be pulled behind a combine so that the corn plant residue being discharged from the combine will be collected by the apparatus with the apparatus separating the stalks, husks, etc., from the heavier c... | 08/24/1999 |
| 5409118 | Open air density separator and method A chamber has an aperture which opens downwardly to the atmosphere and an upwardly opening air return passage. A nozzle-forming duct is inclined upwardly at approximately sixty degrees to the horizontal, and a fan mounted therein directs moving air into t... | 04/25/1995 |
| 5325875 | Apparatus for separating threshed leaf tobacco Apparatus for separating lighter particles such as lamina containing little or no stem from tobacco particles contained in threshed leaf tobacco which comprises a plurality of tobacco particle separating units, each including a separation chamber each a f... | 07/05/1994 |
| 5251763 | Conveying apparatus and separation apparatus An elutriator for separating different grades of leaf material and having a distribution means, an elutriation zone (100) disposed above the distribution means, and a fluid supply fan (113) for supplying a fluid to me zone through the distribution means. ... | 10/12/1993 |
| 5106487 | Parts separator device for separating heavy materials from chips and lubricants A separator device for separating out heavy materials from metal chips and lubricant, in which the separaton may be viewed by an operator while the separation process is in operation at a drop-out opening in the separator. The invention further permits he... | 04/21/1992 |
| 5099863 | Apparatus for separating threshed leaf tobacco A separation device for separating threshed leaf tobacco into (1) lighter particles such as lamina containing little or no stem and (2) heavier particles such as lamina with attached stems or naked stems. The device includes a housing defining a separatio... | 03/31/1992 |
| 4844235 | Vibratory separation apparatus A resilient liner is provided on the particle supporting surface(s) of a vibratory conveyor system. The liner accounts for a live surface that counters the tendency of the particles, particularly those that are moist and sticky, from adhering to each othe... | 07/04/1989 |
| 4784755 | Dust control Product, such as grain, is cleansed of particulate, such as dust, as it is being conveyed in the normal receiving, storage, and shipping processes. The particulate is sucked from the product by large volumes of low velocity air. The particulate is sucked ... | 11/15/1988 |
| 4715950 | Vibratory separation apparatus A vibratory particle separation apparatus of the type having at least two plateau conveying surface interrupted by a drop-out opening. A composite mixture is conveyed by a vibrating action beyond the upper plateau and over a foraminous section in the uppe... | 12/29/1987 |
| 4624370 | Vibratory separation apparatus A vibratory particle separation apparatus of the type having a two plateau conveying surface interrupted by a drop-out opening. A composite mixture is conveyed by a vibrating action beyond the upper plateau and over the drop-out opening. An air supply is ... | 11/25/1986 |
| 4554067 | Seed treating machine A seed treating machine for the separation of seeds from lighter-weight particulant plant matter intermixed with the seeds. The seed separating machine includes a horizontally mounted table having a center opening under which a plurality of fans are mount... | 11/19/1985 |
| 4475562 | Method and apparatus for separating tobacco mixture into lighter and heavier fractions A tobacco leaf mixture containing lighter and heavier fractions is fed into one side of a housing while an airstream flow is introduced at the other side of the housing and in an upwardly directed flow course so as to cause it to entrain the lighter fract... | 10/09/1984 |
| 4461700 | Rotary feeder A rotary feeder for simultaneous screening and discharging of material from the bottom part of a fluidized bed reactor. The rotary feeder is provided with a rotor having blades, between which pockets are formed. In the rotary feeder there is disposed an a... | 07/24/1984 |
| 4453703 | Sintering machine The invention comprises a sinter belt and a collector, vacuum chambers, a gas cleaning device, an air purifying device, and an exhauster mounted adjacent the belt. Above the sinter belt are mounted assemblies for loading a bed and a charge, and an ignitio... | 06/12/1984 |
| 4405451 | Air separation apparatus and system Apparatus and system for carrying out the air separation of waste wherein the waste is transported by conveyor to the input location of the housing of the apparatus, whereupon it is dropped. A fan having a selectively directed dual airstream is positioned... | 09/20/1983 |
| 4382858 | Pivoted and balanced gate for a material separator In a device for separating a liquid, as a cutting oil, from a mixture of metal chips and larger pieces of metal, such as bar ends and scrap, there is provided structure for preliminarily separating larger pieces of metal from the entire mass prior to the ... | 05/10/1983 |
| 4297322 | Equipment for treating and resource recovery from solid waste Equipment and method for treating solid waste in which a non-oxidizing atmosphere is provided through which the shredded solid waste falls freely, unsupported and non-contacted, to prevent fusion of the plastics with each other, with other materials in th... | 10/27/1981 |
| 4219410 | Bar end separator Separation of heavy tramp metal pieces from lighter weight machine tool turnings and chips is accomplished by apparatus and method in which turnings or chips containing tramp objects are moved along a conveying path and across an elongate free-fall area o... | 08/26/1980 |
| 4213852 | Method and apparatus for particle classification Particles are classified according to their terminal velocities, which in turn are determined by their size, shape and composition, by dropping a mass of such particles into an air stream flowing in a direction making a substantial angle with the vertical... | 07/22/1980 |
| 4155837 | Method and apparatus for cleaning and dusting textile fiber tufts A method and apparatus for cleaning textile fiber tufts by depositing such textile fiber tufts onto the upper surface of a supporting member provided with openings, directing streams of compressed air upwardly through the openings in the member and agains... | 05/22/1979 |
| 4152254 | Disk centrifuge for granular material A centrifuge for sifting granular material, ranging in particle size from a few microns to several hundred microns, for example, comprises an upwardly concave frustoconical disk rotatable about a horizontal axis and provided with a similarly shaped cover ... | 05/01/1979 |
| 4152258 | Vibratory feeder A vibratory feeder for conveying particulate material from one level to a higher level comprising an inclined, article-supporting surface, means for vibrating said surface, a plurality of baffles disposed in spaced apart relationship and spaced from the i... | 05/01/1979 |
| 4132634 | Method of an apparatus for sifting particulate material in a cross-current In a method and apparatus for sifting particulate material in a cross current, the method and apparatus being of the type wherein all particles of the same size are propelled transversely at the same velocity of at least approximately 5 m/sec and with the... | 01/02/1979 |
| 4115256 | Apparatus and method for particle separation and grading Apparatus and method for separating fly ash into its major constituents; namely, metal, carbon black, cenospheres and dust. The metal is separated by passing the fly ash through a magnetic field at least a part of which has an alternating polarity. The no... | 09/19/1978 |
| 4083499 | Cigarette package ripper with recycling air leg The invention relates to a method and apparatus for opening packaged articles, particularly packs and cartons of cigarettes, in which such items are ripped open and broken apart sufficiently to allow the contents, e.g. tobacco, to be separated and recover... | 04/11/1978 |
| 3984306 | Pinched sluice separators Granular materials are separated on a dry pinched sluice separator having at its discharge end a conical concave surface. The material to be separated is allowed to flow downwardly over the separator chute under gravity and fluidization and the so separat... | 10/05/1976 |
| 3970547 | Air classification apparatus A rotary drum air classifier system which includes a side feed hopper by which mixed materials to be separated are fed to a screw feed which deposits the materials inside the drum for major separation into light and heavy materials, the screw feed being l... | 07/20/1976 |
| 3957629 | Adjustable air classifier drum and conveyor An air classifier drum for receiving mixed materials and separating them into light and heavy materials, the heavy materials being dropped from one end of the drum during operation onto a conveyor, the drum being rotatable about an axis disposed at a sele... | 05/18/1976 |
| 3957630 | Adjustable materials feeding apparatus A materials separating apparatus which comprises a conveyor on which materials to be separated are deposited and conveyed to a hopper mounted on an adjustable platform, a rotary drum air classifier mounted on said platform, and transport mechanism connect... | 05/18/1976 |
| 3941687 | Solids separation A solids separation system is provided, designed for pneumatic separation of pieces of scrap particularly metallic scrap, into light and heavy fractions. The mixture of pieces of scrap is fed into an enclosed separation vessel wherein they fall by gravity... | 03/02/1976 |
