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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 |
| 8048364 | Method and apparatus for manufacturing aluminum alloy strip for lithographic printing plates An apparatus for manufacturing aluminum alloy strip for a lithographic printing plate supports includes a filter, a launder connected to the filter, a liquid level controller connected to the launder, and a melt feed nozzle connected to the liquid level controller. ... | 11/01/2011 |
| 7727461 | Furnace filtration system for molten metal A furnace filtration system for improving the speed and efficiency of a molten metal centrifugal impeller pump contained within a non-ferrous molten metal furnace. The system includes a filtration well located upstream of the pump well. The filtration well includes ... | 06/01/2010 |
| 7393497 | System and filter for filtering hard alpha inclusions from reactive metal alloys A system for filtering hard alpha inclusions from a reactive metal alloy, such as titanium, is provided. The system includes a vessel, a receptacle and a filter. The vessel is capable of holding the reactive metal alloy in a molten form, and can pour the molten reac... | 07/01/2008 |
| 7275652 | Cup lid apparatus A cup lid for use with a drinking cup containing a liquid, the drinking cup having a base and a sidewall extending upwardly from the base, the sidewall including an inner surface, a top end, and a rim extending along the circumference of the top end. The cup lid com... | 10/02/2007 |
| 7169349 | Method and apparatus for delivering metallurgically improved molten metal A method and an apparatus for enhanced metallurgical processing of molten metal includes an enclosable ladle chamber (23) for reducing the escape of heat during transport of the ladle from a manufacturing vessel such as a furnace (13) to an intermediat... | 01/30/2007 |
| 7157043 | Bonded particle filters An apparatus for filtering molten metal held in a vessel before the metal enters the dosing tube. The filtering apparatus includes an attachment portion that mounts to the dosing tube, a filter body connected to the attachment portion and a planar surface attached t... | 01/02/2007 |
| 7131482 | Distributor device for use in metal casting A distributor device for use in aluminium casting includes a rigid, substantially bowl-shaped receptacle (2) of a refractory material having a base member (4) and a peripheral wall (6) that extends upwards from the base. The receptacle has an in... | 11/07/2006 |
| 7112300 | Ladle bottom The present invention relates to a metallurgical ladle and more particularly to the bottom of the ladle having an outlet through which the molten metal can drain. An object of the present invention is to increase the efficiency of a ladle draining operation, includi... | 09/26/2006 |
| 7036555 | Distributor device for use in metal casting A distributor device for use in aluminium casting includes a rigid, substantially bowl-shaped receptacle (2) of a refractory material having a base member (4) and a peripheral wall (6) that extends upwards from the base. The receptacle has an in... | 05/02/2006 |
| 7025936 | Method and apparatus for preparing a sample for analysis of precious metal content This invention relates to a method for assaying an ore sample to determine the concentration of gold and PGMs therein. The method comprises the steps of separating an ore sample, combining the prepared ore sample with a lead-containing flux, inductively heating the ... | 04/11/2006 |
| 7000676 | Controlled fluid flow mold and molten metal casting method for improved surface A DC casting mold for casting molten metal alloy comprising a cooled tubular body that has a thermally insulated insert attached to its top surface. The thermally insulated insert has a bottom portion with a beveled sidewall, which forms an angle with the horizontal... | 02/21/2006 |
| 6951296 | Method and device for preventing slag from flowing along when tapping a molten metal The invention relates to a device for preventing slag from flowing along when tapping a molten metal out of a metallurgical vessel, whereby the tap opening of the vessel is formed out of interchangeable pipes, which are located one above the other, made of wear-resi... | 10/04/2005 |
| 6500382 | Method and apparatus for slag-free teeming of metal melt from a metallurgical melt vessel A method of slag-free teeming of metal melt includes arranging outside of the metal vessel and closely adjacent to the discharge edge of the vessel discharge opening, of a jetting lance an inclination of which relative to a bath surface in the vessel and ... | 12/31/2002 |
| 6346212 | Converter A converter includes a side wall, and a tapping hole placed at the side wall to allow passage of molten steel. A refractory plug is axially spaced apart from the tapping hole with a predetermined distance. The distance between the refractory plug and the ... | 02/12/2002 |
| 6270717 | Molten metal filtration and distribution device and method for manufacturing the same There is provided a filtration and distribution device for a molten metal, which is in the form of a bag having parts made of a solid heat-resistant fabric and open areas made of an open weave heat-resistant fabric. At least some of the parts made of the ... | 08/07/2001 |
| 6264883 | Plant for the production of metal melts To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic... | 07/24/2001 |
| 6224818 | System and method for purifying molten metal A process and system for purifying molten metal utilize a filter holder which has a spring-loaded clasp for releasably engaging a filter component. The filter holder is particularly well-suited to engaging and releasing a fabric filter having a frame surr... | 05/01/2001 |
| 6193503 | Ash melting furnace and ash melting method thereof The object of this invention is to provide an ash-melting furnace which can respond to fluctuations in the load and which will be capable of highly efficient and stable operation. In an ash-melting furnace which heats and melts the primary ash and the fly... | 02/27/2001 |
| 6153146 | Molten metal receptacle and slag control body transfer apparatus therefor A slag control body transfer and automatic release apparatus for carrying and releasing a slag control body and a molten metal receptacle adapted for subsequently guiding the slag control body are disclosed. The molten metal receptacle includes top and bo... | 11/28/2000 |
| 6074598 | Method and apparatus for slag separation sensing A method and apparatus for improving the yield of molten metal discharged from a metal production vessel limits the slag carryover by reducing turbulence of metal pouring through a discharge opening by inhibiting a vortex over the discharge opening, autom... | 06/13/2000 |
| 5921311 | Installation for eliminating impurities during casting of metals An installation for eliminating impurities during casting of metals, comprising at least one casting ladle (2) which forms an outlet siphon (3) and can tilt around a transverse axis (14). Starting from the siphon (3), the casting ladle (2) is prolonged by... | 07/13/1999 |
| 5804136 | Radial-flow distributor for wide uniform nonturbulent non-dribbling pouring of molten metal into a continuous metal-casting machine-methods and apparatus A radial-flow, wide-pouring molten-metal distributor comprising a curved or arcuate overflow weir which is normally horizontal on its top and which is concave on its upstream side as viewed from above. Over this arc-shaped overflow weir flows molten metal... | 09/08/1998 |
| 5800775 | Refractory block slag dam A dam surrounding a slag tap on a refractory covered, boiler-tube floor for holding back a protective slag layer. The dam is comprised of a plurality of adjacent refractory blocks mechanically secured to the refractory covered, boiler-tube floor near the ... | 09/01/1998 |
| 5766543 | Flow control device A flow control device for the outlet of a molten metal handling vessel is provided for use towards the end of the pouring of molten metal through the outlet. The flow control device has a head portion and a tail portion with flow channels defined between ... | 06/16/1998 |
| 5718415 | Flow control device for the outlet nozzle of a metallurgical vessel A flow control device for the outlet nozzle for a molten metal handling vessel, such as a ladle, includes a plug that fits in the outlet nozzle to define a gap between the plug and a closure for the nozzle. The plug has a plurality of apertures which are ... | 02/17/1998 |
| 5645792 | Slag control shape release apparatus for molten metal vessels A slag control shape is releasably mounted on a mounting member carried on a cover of a molten metal vessel. A movable member is carried on the cover and moved by an actuator into engagement with and moving the mounting member to move the mounting member ... | 07/08/1997 |
| 5505435 | Slag control method and apparatus A method and apparatus are provided for controlling slag in a trough of a tilting furnace or in a free-standing tilting vessel. On a tilting furnace, the apparatus is mounted on a trough extending from the furnace tap hole and has a reservoir for receivin... | 04/09/1996 |
| 5458671 | Suppression of fume in metal pouring Molten (M) is poured into a receiver (8,28) designed to reduce fume and then out into an open area (P) via an outlet (9,29) designed to cause the metal (M) to flow in a laminar flow. A hood (11) may be present above the receiver (8,28).... | 10/17/1995 |
| 5423522 | Slag control shape release apparatus for molten metal vessels A slag control shape is releasably mounted on a cover for a molten metal vessel. An actuator is connected to a slag control shape release member to retract the release member from a first position engaged with the slag control shape to a second position s... | 06/13/1995 |
| 5421560 | Slag control apparatus for molten metal vessels A slag control shape is releasably mounted on a cover for a molten metal vessel. An actuator is connected to a slag control shape release member to move the release member from a first position engaged with the slag control shape to a second position dise... | 06/06/1995 |
| 5382003 | Flow control device for the suppression of vortices A flow control device comprising a baffle plate and a plurality of dividers radially disposed about a nozzle through which liquid is to be discharged and adapted to space the plate from the nozzle. The device finds particular application in substantially ... | 01/17/1995 |
| 5382004 | Tundish slag stopper with sealing rim A slag stopper assembly for use in a tundish vessel includes a chamber for reducing the flow of slag to the tundish drain and a stopper plunger for regulating the flow of liquid metal through the drain. The chamber includes a central opening for receiving... | 01/17/1995 |
| 5375818 | Slag control method and apparatus A method and apparatus are provided for controlling slag in a trough of a tilting furnace or in a free-standing tilting vessel. On a tilting furnace, the apparatus is mounted on a trough extending from the furnace tap hole and has a reservoir for receivin... | 12/27/1994 |
| 5303902 | Slag control shape release apparatus for molten metal vessels A slag control shape is releasably mounted on a cover for a molten metal vessel. An actuator is connected to a slag control shape release member to retract the release member from a first position engaged with the slag control shape to a second position s... | 04/19/1994 |
| 5295667 | Tundish baffle with fluted openings A tundish baffle having a plurality of fluted openings is provided. The fluted openings interrupt and remove inclusions from molten metal passing through the baffle, using a plurality of obstructive peaks and valleys located at the perimeters of the openi... | 03/22/1994 |
| 5249780 | Slag control shape release apparatus for molten metal vessels A slag control shape is releasably mounted on a cover for a molten metal vessel. An actuator is connected to a slag control shape release member to retract the release member from a first position engaged with the slag control shape to a second position s... | 10/05/1993 |
| 5244032 | One piece spout sock and channel bag assembly for aluminum ingot casting A channel bag and a one piece spout sock and channel bag assembly for casting metal ingots. The channel bag includes diverter strips along upper portions of the sides and a diverter panel in the bottom of the channel bag positioned to be beneath a downspo... | 09/14/1993 |
| 5221511 | Strip casting A method and apparatus for casting metal strip in which molten metal is introduced between a pair of parallel casting rollers via a metal delivery nozzle disposed above the nip between the rollers, wherein the delivery nozzle comprises an elongate trough ... | 06/22/1993 |
| 5207974 | Partitioned receptacle for distributing molten metal from a spout to form an ingot Controlling the linear velocity of melt discharge from the discharge outlets of a melt distribution device so as to essentially negate reverse flow from the walls of the mold has been found to produce less oxides and less surface detects in an ingot, part... | 05/04/1993 |
| 5171513 | Refractory article for preventing vortexing in a metallurgical vessel A refractory article is provided for the prevention of vortexing in molten metal as it is drained through a nozzle in a metallurgical vessel. The article has at least one rib extending substantially radially outwardly from an opening therein for draining ... | 12/15/1992 |
