Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7322424 | Crop separating harvester A crop separating harvester includes a primary crop path having an apex, a forced air supply tangentially positioned to the crop path from a bottom side of the apex, and a crop retrieval member, wherein said crop retrieval member is separated from said apex a predet... | 01/29/2008 |
| 7094146 | Combine chaff discharger A chaff discharger with at least one radial fan wheel, rotatably mounted in a fan housing. The housing includes an end wall turned away from a sieving unit and a peripheral wall formed with at least one chaff discharge opening. A direction of rotation of the radial ... | 08/22/2006 |
| 6446813 | Sorting waste materials From one aspect the invention is a method of classifying waste materials comprising arranging two sieve screens, each having an inlet end and an outlet end, one above the other to define a space there between, arranging the upper screen, to be of coarser ... | 09/10/2002 |
| 6329436 | Process to recycle shredder residue A system and process for recycling shredder residue, in which separating any polyurethane foam materials are first separated. Then separate a fines fraction of less than about 1/4 inch leaving a plastics-rich fraction. Thereafter, the plastics rich fracti... | 12/11/2001 |
| 5586660 | Process and apparatus for screening a stream of bulk material The screening of a stream of bulk material is accelerated so that this takes place in the state of the fluidized bed. The screening apparatus can be made correspondingly smaller. So that the fluidized-bed state persists over the screen surface, the latter... | 12/24/1996 |
| 5348161 | Process for guiding air for cleaning semolina, as well as semolina cleaning apparatus A semolina cleaning apparatus allows basic operations as in the prior art with complete visual surveillance of operation, but with an outwardly closed product guidance. In this way, entry and exit of dust is completely prevented during normal operation as... | 09/20/1994 |
| 4913804 | Device and process for separating granular material The device consists of two fluidized bed tables (2, 3) which can vibrate on their support, an can be inclined as desired, allowing a common airflow to pass through. Located over the top end of the upper fluidized bed (2) is an inlet (1) for the granular m... | 04/03/1990 |
| 4652362 | Apparatus and method for separating heavy material, more particularly stones or the like, from cereals and other bulk materials In an apparatus for separating heavy material, more particularly stones, from cereals and other bulk goods, two superposed inclined vibrating tables (1, 2) are provided which have the same air flowing through them and a common drive (30), a product inlet ... | 03/24/1987 |
| 4636305 | Apparatus for cleaning grits In the case of an apparatus for cleaning grits, which has a plurality of superimposed screen layers, which can be vibrated by means of at least one unbalance exciter and with an inlet or outlet for the product inlet or screen discharge arranged at one end... | 01/13/1987 |
| 4561972 | Combine sieve plate A grain harvesting combine is provided with an improved sieve plate for more efficient cleaning of the grain. The sieve plate is mounted on the combine adjacent the rearward end thereof and is substantially rectangular in shape. The sieve plate has forwar... | 12/31/1985 |
| 4466542 | Separating contrivance for cereals A separating contrivance for separating cereals and similar grain product into at least three grain fractions and heavier impurities comprises two air-penetrable fluidized bed tables (2, 3) arranged one over the other and supported in fashion capable of b... | 08/21/1984 |
| 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 |
| 4360423 | Method and apparatus for separating materials of lighter and heavier specific gravities and cleaning the material of lighter specific gravity Raw coal, which contains coal and waste, is introduced into a sizing box having vertically spaced screens inclined rearwardly with the screens being vibrated to separate particles below a selected size from the raw coal. Raw coal is introduced into a wash... | 11/23/1982 |
| 4307732 | Combine harvester A combine harvester with a threshing and a separating mechanism for threshing and separating crop material and a cleaning device for cleaning threshed and separated grain. The cleaning device comprises a cleaning fan structure with a fan housing and a fan... | 12/29/1981 |
| 4227997 | Mobile non-polluting cleaning and processing apparatus and method A mobile vehicle having self-contained apparatus for classifying, cleaning and reconstituting granular or pelletized materials, such as catalysts used in chemical plants, without polluting the surroundings, is adapted to travel from plant to plant over co... | 10/14/1980 |
| 4167478 | Universal modular screening, classifying, cleaning and sizing machine A universal modular screening, classifying, cleaning and sizing machine for dusty material, comprising a frame which supports a screen box by means of cables permitting the free oscillation of the box; the screen box containing spaced parallel screens and... | 09/11/1979 |
| 4133749 | Process of separating solid granular metallurgical products and their precursors and apparatus A process and apparatus for separating solid granular metallurgical products. A plurality of linearly vibrating screens are housed, one over the other, each inclining more than the one above and each having a smaller mesh opening than the one above and 1.... | 01/09/1979 |
