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 |
| 7384263 | Process for burning lumps of material with lean gas A method for burning lumps of material, in particular limestone, is carried out in a regeneration shaft kiln (3) with at least two kiln shafts (1, 2) interconnected by an overflow line (19) and in which the material to be burned passes through a... | 06/10/2008 |
| 6447288 | Heat treating apparatus Apparatus for heat treating a heat treatable material including a housing having an upper opening for receiving a heat treatable material at a first temperature, a lower opening, and a chamber therebetween for heating the heat treatable material to a seco... | 09/10/2002 |
| 6149425 | Static furnace for the thermal decomposition of solids at high temperatures by thermal radiation A furnace for the thermal decomposition of solids by thermal radiation having an inlet for admitting the solids at an upper part with the solids dropping by gravity in the furnace. There is at least one heated radiator body within the furnace below the in... | 11/21/2000 |
| 6139313 | Furnace having toroidal fluid flow heating zone There is described a furnace of the kind in which a toroidal fluid flow heating zone may be established. The furnace includes a chamber (7a) in which there is provided an inner block and a ring of angled blades (21) between the inner block and an inner wa... | 10/31/2000 |
| 6099301 | Feed apparatus for batch preparation feed mixture for feeding into smelting furnace Feed apparatus for treating and feeding lumpy or granular material to a smelting furnace, which apparatus contains a plurality of silos or sub-silos in which said material is contacted with a gas. The silo or sub-silo contains a cone-shaped gas distributo... | 08/08/2000 |
| 5984671 | Sealing device useful for providing air-seal self-controlled discharge of product from a process equipment such as a vertical shaft kiln This invention relates to a sealing device useful for attachment to a process equipment such as vertical shaft kiln (VSK) for providing air-seal self-controlled discharge of product from the said equipment, which comprises a chamber (1) having at its top ... | 11/16/1999 |
| 5769627 | Vertical type calcination kiln A storage device 23 for storing a raw material to be calcined is provided at a position above a kiln cover 1, and the storage device 23 is connected to a preheating space 22 in such a manner as to be capable of dropwise supplying the raw material into the... | 06/23/1998 |
| 5738511 | Vertical shaft kiln This invention relates to a a vertical shaft kiln (VSK) useful for manufacturing cement and other allied products, which comprises a rotary nodule feeder for feeding the raw materials, fitted above the kiln bed for uniform distribution of nodules of the r... | 04/14/1998 |
| 5118288 | Cement advanced furnace and process A suspension shaft furnace and process for producing clinkers from discrete pellets of cement-forming batch materials, the furnace having a top vertical shaft section comprising a pellet-feeding and preheating zone, an intermediate fluidized bed section c... | 06/02/1992 |
| 5044942 | Cement shaft suspension furnace and process Process and furnace for producing clinkered cement pellets from pellets of cement-forming batch materials without melting, fusion and agglomeration of said pellets. The furnace comprises an elongate vertical suspension shaft having top, intermediate and b... | 09/03/1991 |
| 4975046 | Cement shaft suspension furnace and process Process and furnace for producing clinkered cement pellets from pellets of cement-forming batch materials without melting, fusion and agglomeration of said pellets. The furnace comprises an elongate vertical suspension shaft having top, intermediate and b... | 12/04/1990 |
| 4948364 | Lime kilns An annular, vertical shaft kiln comprising a cascading process path with varying cross sectional area, in which the coarse charge particulants tend to follow the longer path near the walls as does the gas being injected into the mid-region of the kiln, wh... | 08/14/1990 |
| 4886448 | Shaft installation for processing of fuel-containing solid materials A shaft kiln installation is used to burn pellets of solid materials containing volatile and/or solid fuels and at the same time to calcinate minerals. For this purpose, the installation uses in the heating, degassing (1,04) and combustion zones (1,06) a ... | 12/12/1989 |
| 4854861 | Process for calcining limestone The present invention relates to a novel process and to an installation for performing the process for calcining limestone for producing lime of different qualities, while being able to entirely or at least substantially do without conventional energy car... | 08/08/1989 |
| 4764107 | Shaft arrangement for thermal and/or material transfer processes between a gas and bulk material An apparatus for gas/solids exchange has a column having a plurality of vertically spaced grates on which the granular solids can form beds to be traversed by the gas. Each grate is provided in a grate plane by a plurality of fixed grate bars interdigitat... | 08/16/1988 |
| 4747773 | Shaft kiln utilized for lime production A vertical shaft kiln utilized in calcining limestone defines a series of processing zones including an upper preheating zone, a first calcining zone, a second calcining zone having a length twice that of the first calcining zone and a material cooling zo... | 05/31/1988 |
| 4708640 | Apparatus for batch preparation and feeding into the smelting process The present invention relates to a method and apparatus for preparing a feed mixture, made of several batch components, at one stage in order to feed it into a smelting furnace. The preparation of the batch may include the preheating and drying of the mat... | 11/24/1987 |
| 4626200 | Shaft kilns having fluid-bed air heater The invention utilizes fluid bed air heaters for burning coarse solid fuels which supply heated gases to annular shaft kilns or double inclined shaft kilns. The solid fuels are introduced into a fluidized bed of inert material, such as sand, alumina or as... | 12/02/1986 |
| 4563958 | Furnace charge preheater In a furnace charge preheater, especially one for scrap metal, in the form of a bucket whose bottom contains at least two outswinging half-shells, the bucket bottom when in the closed state is formed of a central part and at least one ring while the inner... | 01/14/1986 |
| 4473352 | Double-incline shaft kiln In a double-incline shaft kiln in which ore materials are charged into the furnace from the top of a vertical external portion of the shaft and are calcined by burners installed in the lower portion of the shaft, the calcining zone is effectively extended... | 09/25/1984 |
| 4452584 | Ring shaft kiln for calcining materials and a method of operation A method and improved kiln for calcining and sintering of lumpy materials which includes an arrangement for creating a cavity in the material being processed adjacent each burner units so that a solid fuel can be applied on a cavity surface of the materia... | 06/05/1984 |
| 4403951 | Shaft furnace for burning or firing and sintering material in lump form or pellet form and with an internal burner A shaft furnace for burning or firing and sintering material, such as limestone, dolomite, etc in lump or pellet form, in which the cooling air is introduced into the external cooling air duct in the vicinity of the furnace bottom, flows upwardly through ... | 09/13/1983 |
| 4252521 | Furnace for the heat treatment of lumpy to fine grained material A furnace is disclosed for the heat treatment of mainly lumpy to fine grained material. The furnace is either a shaft furnace or a rotary furnace for the calcination or sintering of limestone, dolomite or magnesite. The calcination material passes through... | 02/24/1981 |
| 4212114 | Apparatus for preheating solid particulate material Apparatus for preheating solid particulate material which material is to be subjected to thermal processing in a furnace. The preheater includes a vessel having an inlet for solid particulate material to be heated, an outlet for preheated material, an inl... | 07/15/1980 |
| 4149844 | Optimum continuous flow grain drying and conditioning method and apparatus A continuous grain drying and conditioning apparatus of a type including a burner and blower, or a multiplicity of burners and blowers, surrounded by a plenum chamber, air pervious grain holding walls positioned outwardly with respect to the plenum chambe... | 04/17/1979 |
| 4147504 | Apparatus for regenerating activated carbon The regenerating apparatus or furnace has gas burners mounted thereon to deliver combustion gas tangentially to a header and thence to distributing ports arranged circumferentially around and internally of a columnar bed of carbon being regenerated to pro... | 04/03/1979 |
| 4144654 | Drying apparatus Granular solid material is dried in a vertically extending annular chamber formed between inner and outer cylindrical walls by a current of high temperature inert drying gas of high humidity passed downward through the material. Material enters the chambe... | 03/20/1979 |
| 4140480 | Hot cupola gas burner A pilot flame to be positioned close to the charge opening of a cupola which uses carbon monoxide as a fuel in the presence of a fresh supply of combustion air, such carbon monoxide being drawn off from a position on the cupola where the temperature is ab... | 02/20/1979 |
| 4025293 | Process and apparatus for firing and sintering of granular material A process for the firing and sintering of granular material in a gas or oil heated shaft furnace is disclosed in which the material, fed from the top of the furnace passes downwards successively through an entry zone, a preheating zone, a firing zone in w... | 05/24/1977 |
| 3932119 | Baffles for grain dryer A grain dryer is disclosed in which a blower forces air past a burner and then through a duct into a bin made of oppositely curved columns of grain defining between them and an end wall a plenum chamber for drying the grain in the bin. The invention resid... | 01/13/1976 |
