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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 |
| 7432479 | Method and apparatus for inductive heating of a food container Heating devices and methods which are particularly useful in vending machines for hot Foods. Foods such as beverages contained in individual containers such as cans are rapidly heated to serving temperature by induction heating for delivery to a customer. Various ty... | 10/07/2008 |
| 7411164 | Device for inductive injection of thermal energy into a printing form for fixing an image An image fixing device inductively injects thermal energy into a rotating printing form of a press for fixing an image formed on the rotating printing form by means of a digital imaging system. The fixing device has at least one inductor with at least one induction ... | 08/12/2008 |
| 7402782 | Baking device and baking method of baking a chemically amplified resist film containing an acid (H) generator before exposure but after development A heat treatment device for baking a chemically amplified resist film formed on a substrate after exposure but before development includes a table that supports the substrate, a heater that heats the substrate, a magnetic field generating unit that generates a magne... | 07/22/2008 |
| 7323667 | Curie temperature thermostat for a eddy current heating device and method The device and method are used for controlling eddy currents generated by an electro-magnetic heater having at least one magnetic field producing element. To control the heater, a source of heat is used to heat a Curie temperature material, located adjacent to the m... | 01/29/2008 |
| 7317177 | Electric induction heat treatment of an end of tubular material A magnetic flux concentrator is used to control the end heating of a tubular material in an electric induction heat treatment process. The magnetic flux concentrator may consist of fixed elements, or a combination of fixed and moveable elements to accommodate end he... | 01/08/2008 |
| 7276704 | Photomultiplier tube, photomultiplier tube unit, and radiation detector A photomultiplier tube, a photomultiplier tube unit, and a performance-improved radiation detector for increasing a fixing area of a side tube in a faceplate while increasing an effective sensitive area of the faceplate. In the photomultiplier tube, a side face (... | 10/02/2007 |
| 7268327 | Induction heating apparatus with magnetic flux adjusting means A heating apparatus has an induction heat generation member for electromagnetic induction heat generation by the magnetic flux at a heating portion, wherein a material to be heated is introduced to the heating portion and is fed in direct contact with the induction ... | 09/11/2007 |
| 7268326 | Magnetic flux driven heat generation member with magnetic flux adjusting means An electromagnetic induction heating apparatus capable of uniformize a temperature distribution in a longitudinal direction of an induction heating member includes: an exciting coil (magnetic flux generation means); a fixation roller (induction heating member) for g... | 09/11/2007 |
| 7262392 | Uniform thermal processing by internal impedance heating of elongated substrates An elongated substrate may be heated in a roll processing system. At least a portion of the elongated substrate is loaded into the roll processing system. A sufficient electrical current is caused to flow in the portion of the elongated substrate to heat the portion... | 08/28/2007 |
| 7205512 | Fixing device using induction heating An electrophotography fixing device has a heating roller and an induction heating device. In order to improve heat resistance, heat radiating performance and insulation performance and in order to appropriately uniformly heat the heating roller, in the induction hea... | 04/17/2007 |
| 7205515 | Image forming apparatus In an image forming apparatus according to the present invention, a shield plate 202 which is made of a specific material and has a specific thickness is provided between an exciting coil and at least one of a first and a second magnetic field intensity measu... | 04/17/2007 |
| 7132631 | Induction heating for image flexing with means for adjusting magnetic flux A heating apparatus of an electromagnetic induction heating type includes a coil and a roller which generates heat by the action of magnetic flux generated from the coil. A recording material is heated by the roller. The heating apparatus further includes a movable ... | 11/07/2006 |
| 7129448 | Heating apparatus fusing apparatus and image forming apparatus A heat apparatus for an electromagnetic induction heating system comprises a heat roller that comprises magnetic and conductive material. The heating apparatus also comprises a magnetic excitation coil that is positioned around a portion of the periphery of the heat... | 10/31/2006 |
| 7126095 | Frying hob arrangement with induction heating A frying arrangement includes a planar heating element (5) including a ferromagnetic material and constituting a frying surface. The arrangement includes at least two magnetic field generators (1, 2) each having two free ends, wherein the heating eleme... | 10/24/2006 |
| 7122769 | Induction heating apparatus for image fixing In an electromagnetic induction heating-type heating apparatus for moving a temperature decreasing member toward or apart from an effective position where a temperature in a predetermined area is decreased in order to take countermeasure against temperature rise at ... | 10/17/2006 |
| 7102108 | Induction-heating apparatus operating with power supplied in a select frequency range An excitation coil and/or a core member, which has a characteristic frequency other than frequencies used, is employed. Thereby, resonance is prevented between adjacent coils or between a coil and an adjacent component such as a core member. ... | 09/05/2006 |
| 7098430 | Heating apparatus with target temperature control and means for changing target temperature Information on a temperature of a heat generation member at a position which is in the neighborhood of an end portion of a conveyance area of a material, to be heated, having a maximum size and in the neighborhood of a non-conveyance area of a material, to be heated... | 08/29/2006 |
| 7087869 | Transverse induction heating apparatus In a transverse induction heating apparatus in which a material to be rolled is heated by inductors to which electric power is supplied from an AC power source, iron core widths of the inductors in a plate width direction of the material to be rolled are smaller tha... | 08/08/2006 |
| 7022951 | Induction heating work coil An induction heating device or work coil for heating electroconductive material to a desired temperature that can be used on a roll or cylinder of any diameter. The work coil has an open core of ferrite material shaped in a U. Wire is wound around the opposing legs ... | 04/04/2006 |
| 7005619 | Induction heating device, induction heating fixing device and image forming apparatus An induction heating device for inductively heating an object to be heated which is formed of conductive material has a holder. The holder is positioned outside the object. The device has an exciting coil for inductively heating the object. The exciting coil is supp... | 02/28/2006 |
| 7002119 | Device for liquid heating by electromagnetic induction and short-circuit using three-phase industrial frequency power The present invention relates to the field of electromagnetic induction and short circuit heating. The iron core in the heating device of present invention, which is in the form of EI, is completely made of multi-layered silicon steel sheets to form a closed three-p... | 02/21/2006 |
| 6992406 | Induction heating or melting power supply utilizing a tuning capacitor A rectifier/inverter power supply for use with induction heating or melting apparatus includes a tuning capacitor connected across the output of the rectifier and input of the inverter. The tuning capacitor forms a resonant circuit with an inductive load coil at the... | 01/31/2006 |
| 6969833 | Heating apparatus and image heating apparatus A heating apparatus includes a magnetic field generator for generating an AC magnetic field; a heat generation member for generating heat by the magnetic field generated by the magnetic field generator, the heat generation member being effective to heat a material t... | 11/29/2005 |
| 6900420 | Cooled induction heating coil The present invention relates to an induction heating coil comprising a litz cable which is wound into a spiral to form a bobbin, and means for cooling said cable indirectly. The litz cable is arranged to be cooled by means of an indirect cooling system that compris... | 05/31/2005 |
| 6894256 | Apparatus in the production of a package or a packaging material An apparatus in the production of a package or a packaging material comprising at least one metal layer and one polymer layer, the apparatus including an inductor connectable to a high frequency current source. According to the invention, said inductor includes a co... | 05/17/2005 |
| 6884976 | Induction heating for localized joining of structural members An apparatus and a method for forming a localized joint in at least one structural member are provided. The apparatus includes a tool that corresponds to a joint portion of the structural member. An induction coil is disposed in the tool, and a power source is confi... | 04/26/2005 |
| 6884975 | Localized stress relief by induction heating A system and method inductively heats and stress relieves a weld joint area having a stress induced zone. A susceptor assembly is positioned over the stress induced zone. The susceptor assembly includes susceptor sheets manufactured to operate at different, preselec... | 04/26/2005 |
| 6872925 | Image heating device using induction heating and image forming apparatus An image heating device includes a heat generating member that heats a body to be heated that is allowed to travel while carrying an image, an excitation unit that is provided close to the heat generating member and generates magnetic flux so as to cause the heat ge... | 03/29/2005 |
| 6858823 | Infrared heater using electromagnetic induction The invention concerns a heater made of a material (5) responsive to induction and capable of sustaining high temperatures. It further comprises at least an insulating thickness with low thermal conductivity, in particular a low temperature insulation (3 | 02/22/2005 |
| 6847019 | Induction heating roller device, heating roller for induction heating roller device, fixing apparatus and image forming apparatus An induction heating roller, a fixing apparatus and an image forming apparatus are disclosed as including a heating roller (TR) comprised of a hollow roller base body (BB), composed of electrically insulating material, and a plurality of secondary coil components (w... | 01/25/2005 |
| 6818871 | Induction heating roller unit, fixing device and image forming apparatus To provide an induction heating roller unit that can efficiently supply power to a heating roller, and fixing device and image forming apparatus incorporating the same. The induction heating roller unit includes: a heating roller; and an induction coil having an out... | 11/16/2004 |
| 6794976 | HF transformer assembly having a higher leakage inductance boost winding A high frequency transformer for a welding-type device is provided. The transformer includes a pair of ferrite cores and a bobbin configured to receive and support the pair of ferrite cores. A primary winding assembly, as well as, a secondary winding assembly is pro... | 09/21/2004 |
| 6770858 | Device for inductively heating metallic strips For optimum induction heating of metallic strips (1) of differing widths—particularly in the edge region—one multicoil transverse field inductor is positioned both above and below the strip (1) to be heated, whose coil axes are positioned verticall... | 08/03/2004 |
| 6765181 | Inductor assembly An apparatus and process are provided for induction heat treatment of electrically conductive workpieces. The inductor assembly is formed from a single piece inductor that utilizes an electrically non-conductive top, side and bottom frames to hold flux concentrators... | 07/20/2004 |
| 6737618 | Magnetic coil apparatus for heating magnetic substances in biological tissue A magnetic coil arrangement for a magnetic field applicator (1) which heats magnetic or magnetizable substances or solids in biological tissue is disclosed which includes a coolable magnetic yoke (2) with two spaced, opposing pole shoes (7, 8) s... | 05/18/2004 |
| 6713734 | Image heating apparatus for heating image formed on recording material An image heating apparatus has an excitation coil for generating a magnetic field and a heating member for dissipating heat by an eddy current induced in the heating member by that magnetic field. A core is provided for guiding the magnetic field and the core includ... | 03/30/2004 |
| 6642488 | Fixing device using induction heating and method for producing same A fixing device for an electrophotography system, which is capable of efficiently and uniformly heating an object to be heated, which has a coil capable of being easily produced and which is capable of being stably fixing a fixed material, is provided by ... | 11/04/2003 |
| 6635009 | Magnetic field applicator for heating magnetic substances in biological tissue A magnetic field applicator to heat magnetic substances in biological tissue, having a magnetic yoke with two pole shoes across from each other and separated from each other by a distance that defines the magnetic field exposure volume produced by the app... | 10/21/2003 |
| 6635492 | Heating specimen carriers A method and apparatus for heating specimens in wells of a metallic specimen carrier. The specimen carrier is heated by applying resistive heating directly to the carrier. An AC source and transformer may be used where the specimen carrier is in series wi... | 10/21/2003 |
| 6590190 | Induction system and safe armature The invention concerns an induction system for heating, re-heating and keeping warm a food container combining an armature beneath the container, an induction device supporting the container optimised for the safety of the user, the electromagnetic compat... | 07/08/2003 |
