William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7380673 | Flow diverter and exhaust blower for vibrating screen separator assembly A flow diverter and a vacuum blower for vibrating screen separator assembly. The flow diverter decelerates and increases the exposed surface of materials. The exhaust blower removes vapors from the materials. ... | 06/03/2008 |
| 7380672 | Flow diverter and exhaust blower for vibrating screen separator assembly A flow diverter and a vacuum blower for vibrating screen separator assembly. The flow diverter decelerates and increases the exposed surface of materials. The exhaust blower removes vapors from the materials. ... | 06/03/2008 |
| 7322882 | Grain cleaning system for a combine harvester A drive linkage is described for reciprocating a sieve that is suspended within a frame of a combine harvester for movement in mutually orthogonal directions. The drive linkage comprises a cranking mechanism for imparting a reciprocating motion to the sieve in the d... | 01/29/2008 |
| 7243801 | System for removing plastic from recycled material A system for separating pieces of plastic bag from ground yard debris and the like, e.g., asphalt shingles. A conveyor conveys the debris material along a conveyor path and an agitator bounces the conveyor to cause the lighter plastic to reposition to the top of the... | 07/17/2007 |
| 7093718 | Inline sifter A booster 8 extending in an internal area 53 of a sieve 7 is attached to the outer circumferential face of a rotating shaft 6. The booster 8 has four blades 82, which are radially extended from the outer circumferential face... | 08/22/2006 |
| 6726029 | Separator screen with solids conveying end area A screen assembly for a vibratory separator having, in one aspect, a frame with a plurality of openings therethrough, screening material on the frame over the openings, the frame having an end area at a material exit end of the frame, and end apparatus at the end ar... | 04/27/2004 |
| 6375011 | Vibrating conveyor and method for conveying silicon fragments A method for conveying silicon fragments has the silicon fragments being conveyed over a conveyor surface, which is made from hyperpure silicon. There is a vibrating conveyor, and during the conveying, the sharp edges of the silicon fragments are rounded ... | 04/23/2002 |
| 6223905 | Particle separator including continuous train of separating pans A separator 10 is disclosed and claimed. The separator includes a continuous separating assembly 20 following a trajectory having a top run A and a return run B. The assembly includes a train of articulated pan assemblies 22.1 to 22.n. Each pan assembly i... | 05/01/2001 |
| 5799801 | Method and apparatus for separating paper from cardboard A disc screen classifies material by size. The disc screen includes a frame, a plurality of shafts mounted on the frame parallel with one another and a first stage including discs mounted on the shafts in a substantially coplanar row. Each of the discs ha... | 09/01/1998 |
| 5667080 | Jewelers vacuum A hand-held jeweler's vacuum comprises an elongated vacuum member with an opening at one end, motor drive means located at the other end and an aperture in the bottom of the elongated member. A detachable box member is mounted beneath the aperture to rece... | 09/16/1997 |
| 5593042 | Quality-control sieve and method of using it The novel invention proposes a final screen which is very reliable in operation and which is suitable more particularly also for building into a pneumatic conveying line. In a first section the material is distributed uniformly over the entire peripheral ... | 01/14/1997 |
| 5078865 | Appliance for the removal of rakings and/or screenings out of liquid flowing in a launder The invention relates to a device for the removal of particles and/or screenings from a liquid running in a laundry. A screen with openings in the shape of a cylinder jacket reaches into the laundry and is tilted upwards. The screen is partly immersed in ... | 01/07/1992 |
| 5072991 | Floating grab dredge and unloading method therefor A floating grab dredge has first and second pontoons spaced apart sufficiently to define a work space therebetween. The work space is large enough to define a barge slip therein as well as a digging well adjacent to the barge slip. A gantry mounted on the... | 12/17/1991 |
| 5033932 | Harvest trailer with stick remover and load leveling structure A nut harvest trailer having a hopper with a rotatable loop of flexible screen affixed over the top of the hopper extending from the front to the rear thereof. A solid panel is affixed between an upper and lower layer of the loop of screen. The solid pane... | 07/23/1991 |
| 4986422 | Method of screening solid materials and apparatus for performing same The method of screening solid materials resides in feeding a solid material onto a sifting surface and imparting oscillations to surface under the action of an effort directed at an angle to the longitudinal axis of the sifting surface, providing for movi... | 01/22/1991 |
| 4952309 | Auger-type flour sifter A flour sifter for separating doughballs from fine particulate matter in a breading mixture, comprises a hopper for receiving the breading mixture. The lower portion of the hopper includes a sifting screen along most of the longitudinal length that is siz... | 08/28/1990 |
| 4906356 | Material classifying apparatus A material classifying apparatus for separating material into at least overs and fines. The apparatus includes a material receiving housing supporting one or more vertically spaced separator screens. When more than one separator screen is used, the lowerm... | 03/06/1990 |
| 4797204 | Automatic particle-size analyzer with divided drum An apparatus for automatic screen analysis of a granular material in which the material is screened from a polygonal drum which is divided crosswise into at least two chambers by a transverse partition. A first chamber has progressively coarser screens on... | 01/10/1989 |
| 4645590 | Vertical type screening machine for granular material A vertical type screening machine for granular material comprises a housing. A rotary drum assembly is rotatably mounted within the housing and comprises a drum having a substantially vertical rotary axis and a helical blade helically wound around a circu... | 02/24/1987 |
| 4522344 | Wood chip screening and processing methods and apparatus A system for separating and classifying whole tree wood chip material comprising essentially wood and bark overs, chips and bark fines which is supplied to a bin or receptacle. The chip material is augered in a forward direction in a monitored flow longit... | 06/11/1985 |
| 4472272 | Apparatus for washing inert material In order to wash inert materials, even of a large size, with a limited amount of washing liquid and with a lesser consumption of energy and without moving metal parts, apparatus having a plurality of tubular rotors (1) which are in side-by-side relation b... | 09/18/1984 |
| 4466230 | Automatic fan speed adjuster for combine harvester A combine harvester having threshing and separating mechanism, sieve through which crop material separated by the threshing and separating mechanism passes, cleaning mechanism having a fan operable to blow air through the sieve and hence clean the crop ma... | 08/21/1984 |
| 4447382 | Apparatus for making foam carpet pad An apparatus for making a foam pad for carpets has features to improve the quality of the pad. The apparatus has a hopper section for receiving foam particles coated with heat activated bonding agent. An extruder section compresses the particles as they a... | 05/08/1984 |
| 4353796 | Apparatus for digging and transporting soil and sand, stones and rocks, minerals and the like In digging and hauling soil, rocks, minerals and the like by the use of a dragline the invention provides a novel combination of said dragline, a conveyor means for hauling the materials dug, and a hopper means disposed over and movable along said conveyo... | 10/12/1982 |
| 4240902 | Apparatus for removing foreign matter from cotton An apparatus for removing foreign matter from cotton includes an elongated frame having a plurality of rollers rotatably supported in closely spaced side-by-side relation therealong for conveying cotton over the rollers from one end of the frame to the ot... | 12/23/1980 |
| 4238324 | Apparatus for separating impurities from fiber suspensions The disclosure concerns an apparatus for separating impurities from a fibrous suspension. The apparatus includes a tiltable housing having a screen basket supported coaxially therein. A rotor is supported inside the screen basket. The rotor has three zone... | 12/09/1980 |
| 4234992 | Cleaning apparatus Apparatus for cleaning objects, especially root crops such as sugar beet, comprises first and second members defining first and second surfaces respectively arranged for cleaning objects by relative movement between the surfaces and the objects to be clea... | 11/25/1980 |
| 4177900 | Grain scalping and cleaning apparatus and method A grain scalping and cleaning apparatus for removing impurities in grain according to size is disclosed. The apparatus includes multiple grain movement paddles moving relative to appropriate screens. An endless chain drives the grain movement paddles. Bot... | 12/11/1979 |
| 4165280 | Method and means for cleaning feed hoppers The invention provides for the automatic and continuous cleaning of feed hoppers. A plurality of brushes extend transversely across the path of the upper flight of the horizontal conveyor in the bottom of a feed hopper. The brushes are spaced from each ot... | 08/21/1979 |
| 4126541 | Apparatus and method for refining asbestos dispersions Apparatus for the refinement of colloidal asbestos dispersions comprises a horizontally disposed cylindrical tube having a plurality of closely spaced holes around the periphery thereof, a helical screw disposed within the tube, and a flanged jacket conce... | 11/21/1978 |
| 3998396 | Scalping apparatus for a low profile two-roll crusher In a low profile crusher which has first and second cylindrical rolls journaled so that the rotational axis of the rolls are parallel and an input conveyor and an output conveyor is improved by journaling the first roll so that the distance from the axis ... | 12/21/1976 |