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 |
| 7252798 | Hood-type annealing furnace, especially for steel strip and wire bunches The invention describes a hood-type annealing furnace, especially for steel strip or wire bunches, with an annealing base (1) for receiving the material (7) to be annealed, a protective hood (8) which is placed on the furnace in a gas-tight mann... | 08/07/2007 |
| 7204894 | Annealing of hot rolled steel coils with clam shell furnace Disclosed is a high temperature annealing furnace for hot rolled steel coils. The furnace of the present invention pivotably rotates about a pivot member between an opened and closed position. Prior to the annealing step, the hot rolled steel coils are placed within... | 04/17/2007 |
| 6655956 | Metal frame for metal coils to be heat-treated A support frame for metal coils, which are stacked on top of each other for a heat treatment by means of a hot, gaseous medium, especially in bell-type annealing furnaces, has devices on the support frame for guiding the flow of the medium through the coi... | 12/02/2003 |
| 6177044 | Bell-shaped furnace A top hat furnace especially adapted for annealing steel sheet metal using a protective gas includes a protective top surrounding the batches of sheet steel metal. A cooling top is arranged above the protective top forming an intermediate space. The cooli... | 01/23/2001 |
| 5961322 | Water cooled inner cover for annealing furnace An annealing furnace inner cover cooperates with a furnace base to define a treatment chamber within which a charge of metal such as steel is housed for annealing, wherein the inner cover carries at least one interior cooling conduit through which cooling... | 10/05/1999 |
| 5871688 | Multi-stack annealer An annealing furnace is disclosed including at least one inner cover for retaining a stack of metal coils to be annealed in an inert atmosphere. A furnace shell is provided for receiving said at least one inner cover and providing an internal furnace envi... | 02/16/1999 |
| 5756043 | Cast refractory base segments and modular fiber seal system for plural-stack annealing furnace A rigid ceramic refractory base for a plural-stack annealing furnace--such as an eight-stack furnace that has two "four-stack rows" or "halves" arranged side by side--is assembled atop a base support structure utilizing a novel set of cast refractory segm... | 05/26/1998 |
| 5681525 | Cast refractory base segments and modular fiber seal system for single-stack annealing furnace A rigid ceramic refractory base for a single-stack annealing furnace is assembled atop a base support structure utilizing a novel set of cast refractory segments, including a pair of C-shaped inner segments and four arcuate outer segments. Defined between... | 10/28/1997 |
| 5616297 | Annealing base for hood-type annealing furnaces An annealing base for hood-type annealing furnaces comprises a support (6) receiving the annealing goods, in particular stacked sheet metal coils. The support (6) rests on the distributor (4) of a central fan (5). The vertical fan axis is surrounded by a ... | 04/01/1997 |
| 5578264 | Cast refractory base segments and modular fiber seal system for plural-stack annealing furnace A rigid ceramic refractory base for a plural-stack annealing furnace is assembled atop a base support structure utilizing a novel set of cast refractory segments, including spaced pairs of C-shaped inner segments that each are surrounded by a sub-set of o... | 11/26/1996 |
| 5575970 | Cast refractory base segments and modular fiber seal system for plural-stack annealing furnace A rigid ceramic refractory base for a plural-stack annealing furnace is assembled atop a base support structure utilizing a novel set of cast refractory segments, including spaced pairs of C-shaped inner segments that each are surrounded by a sub-set of o... | 11/19/1996 |
| 5483548 | Insulated furnace door and wall panel system An energy efficient wall panel for use together with other such panels to extend about selected peripheral portions of a thermal treatment chamber of a high temperature industrial furnace or the like includes a frame that supports an array of elongate cas... | 01/09/1996 |
| 5308046 | Insulated furnace door system An energy efficient closure system is provided for minimizing heat loss through an elongate, horizontally extending furnace opening that is utilized to admit elongate charges of material, to the interior of a furnace. The system utilizes a plurality of de... | 05/03/1994 |
| 5290017 | Cooling cover for batch coil annealing furnace An improved cooling cover is disclosed for use in bell shaped annealing furnaces. The cooling cover includes a jet nozzle orifice arrangement which develops jet streams from a low pressurized supply of air at ambient temperature in the plenum chamber of t... | 03/01/1994 |
| 5048802 | Diffuser system for annealing furnace with chain reinforced, nodular iron convector plates A convection diffuser and charge support system for an annealing furnace utilizes a diffuser base assembly to support a stack of coiled rolls of steel that are to be annealed inside a furnace enclosure. The coils are arranged in a vertical stack atop the ... | 09/17/1991 |
| 4933078 | Sorption vessel with internal interstage screening vessel A sorption vessel including a tank for retaining a pulp of an aqueous slurry and a sorbent at a predetermined liquid pulp level therein; and an interstage screening system disposed within the tank and at least partially submerged beneath the predetermined... | 06/12/1990 |
| 4861000 | Installation having several elements for heat treatments An upper line comprises three furnaces 1, 2, 3 and a washing machine 4, in straight side-by-side arrangement. A lower line comprises movable treatment elements 7, 8, 9 movable on conveyor track 5, and fixed vat 17. Car 6 permits feeding all the elements o... | 08/29/1989 |
| 4755236 | Method of annealing using diffuser system for annealing furnace with water cooled base A convection diffuser and charge support system for an annealing furnace utilizes a diffuser base assembly that includes a vane-carrying center casting which underlies a charge support plate, and which is perimetrically surrounded by a pair of outer and i... | 07/05/1988 |
| 4611791 | Diffuser system for annealing furnace with water cooled base A convection diffuser and charge support system for an annealing furnace utilizes a diffuser base assembly that includes a vane-carrying center casting which underlies a charge support plate, and which is perimetrically surrounded by a pair of outer and i... | 09/16/1986 |
| 4544142 | Rotary hearth finish annealing furnace A rotary hearth finish annealing furnace includes coil tables carrying thereon steel plate coils to be annealed with their axes being vertical, a hearth traveling along a circle having a predetermined radius and supporting thereabove the coil tables, inne... | 10/01/1985 |
| 4516758 | Diffuser system for annealing furnace A convection diffuser and charge support system for an annealing furnace utilizes a diffuser base, a base-encircling ring, and convector plates which are preferably formed as castings of nodular iron. The diffuser base defines an array of horizontally-ext... | 05/14/1985 |
| 4504957 | High temperature box annealing furnace A high temperature box annealing furnace for metallic coil annealing practices. The furnace comprises a fixed base and a removable bell capable of achieving a sealed relationship with the base. The interior of the bell side walls, end walls and roof are l... | 03/12/1985 |
| 4502671 | Batch annealing apparatus A batch annealing apparatus comprises a bell-shaped furnace, a base plate, an inner cover, plus a bottom chamber that opens upward, has an inside diameter slightly larger than the outside diameter of a metal coil to be treated therein, is capable of accom... | 03/05/1985 |
| 4310302 | Batch coil annealing furnace baseplate The present invention is a method and apparatus for heat treating at least one work item, such as a coil, having an axial passage and being axially stacked on a base support means disposed within a cover means which is located on the base support means. T... | 01/12/1982 |
| 4278242 | Bell-type coil annealing furnace inner cover An inner cover for a bell-type annealing or thermal processing furnace having a thin walled cylindrical body formed from textured heat resistant stainless steel and/or nickle chrome alloy closed at its upper end and having one or more outwardly flared con... | 07/14/1981 |
| 4147506 | Method and apparatus for heating coils of strip Coils of strip to be annealed are placed in a furnace with their eye vertical and are heated to the annealing temperature by heating elements on the furnace side wall at the same elevation as the coils. An insulation shield is provided between the heating... | 04/03/1979 |
