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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 |
| 8181791 | Rotor element and a rotor for a screening apparatus The present invention relates to a rotor element for use with a rotor and a rotor featuring said elements. The rotor is used in a screening apparatus of the pulp and paper industry. The rotor element (10) has two longitudinal edges, a first, so-called leading... | 05/22/2012 |
| 7328805 | Method and system for beneficiating gasification slag The present invention provides a method of beneficiating slag, including mixing the slag with water to form a slurry. The slurry is screened through a first screen to remove a first portion of material and then screened through a second screen to remove a second por... | 02/12/2008 |
| 7296684 | Screen for cleaning a fiber suspension A screen, for cleaning a fiber suspension, includes at least one separating unit containing a housing, a parabolic rotor, a screen basket, an accept chamber, and a reject outlet. The reject outlet is located in the vicinity of the maximum rotor diameter. The screen ... | 11/20/2007 |
| 7188622 | Filtering face mask that has a resilient seal surface in its exhalation valve A filtering face mask 10 that has a mask body and a new exhalation valve 14. The mask body is adapted to fit at least over the nose and mouth of a person to help define an interior gas space when the mask is worn. The exhalation valve 14 permits... | 03/13/2007 |
| 7168570 | Screen cylinder with performance boosting configuration A screen cylinder (125) used for screening cellulosic fibrous material pulp in the pulp and paper industry incorporates first (66) and second (67) downstream surfaces (16) having contoured slopes that form a funnel entrance of the grooves... | 01/30/2007 |
| 7163106 | Strainer for cleaning fibrous suspensions A strainer for fibrous suspensions, having a container, a filtering basket inside the container and a rotor inside the filtering basket coupled to motorization means suited to set it rotating. In the container there are a drain chamber of the rejected suspension, a ... | 01/16/2007 |
| 7121411 | Screen apparatus It is an object of the present invention to provide a screen apparatus having a function of dilute water which is suitable for a centripetal type screen which rotates inside the screen. A screen apparatus A comprises a tank 1 for receiving paper raw materials... | 10/17/2006 |
| 7122119 | Sieve separator A sieve separator and a method of slurry separation that uses two or more levels of filtration screens. In some embodiments, the filtration screens on different levels may be used to separate solids of various sizes at each level. ... | 10/17/2006 |
| 7093718 | Inline sifter A booster 8 extending in an internal area 53 of a sieve 7 is attached to the outer circumferential face of a rotating shaft 6. The booster 8 has four blades 82, which are radially extended from the outer circumferential face... | 08/22/2006 |
| 7063214 | Interlocking screens for vibratory separators Interconnectible screen assemblies for vibratory separators or shale shakers and methods for manipulating such screen assemblies which, in certain aspects, include a first screen assembly and a second screen assembly positioning at least a portion of the first scree... | 06/20/2006 |
| 7055697 | System for separating fluid-borne material from a fluid that carries particulate matter along with the material A system for screening fluid-borne material from a fluid that carries particulate matter along with the material, e.g. for screening usable fibers in papermaking or tissue making white water that also contains waste material such as fines and ash. The system employs... | 06/06/2006 |
| 6942104 | Rotor with multiple foils for screening apparatus for papermaking pulp A rotor adapted for use in a hydrodynamic device comprising a cylindrical screen having a circumferentially continuous apertured zone. The rotor has an axis of rotation and includes a substantially cylindrical outer surface adjacent the cylindrical screen surface. T... | 09/13/2005 |
| 6938846 | Screening apparatus with slot ring moveable in axial direction Apparatus for screening pulp suspensions is provided, including a housing, a rotary screen within the housing, a screen chamber between the rotary screen and the housing, a reject outlet, an accept outlet, an outer screen surface defining the outer surface of the sc... | 09/06/2005 |
| 6932883 | Screens for vibratory separators A method for making a screen assembly for a vibratory separator, the method including, in at least certain aspects, gluing together with glue at least two layers of fine screening material, allowing the glue to set, preheating the glued together at least two layers ... | 08/23/2005 |
| 6926839 | Method and apparatus for removing particulate contaminants from commercial laundry waste water A filtration apparatus includes a filter element disposed at a 45 degree angle defining an upper chamber for solids and a lower chamber for liquid. A trough is disposed at the lower end of the filter element. The floor of the trough funnels toward a central drain an... | 08/09/2005 |
| 6923329 | Screen apparatus A screen apparatus includes a tank, a first cylidrical screen disposed inside the tank to form a first chamber, and a second cylidrical screen disposed outside the first cylindrical screen. The second cylindrical screen defines a second′ chamber facing the first c... | 08/02/2005 |
| 6905032 | Screens for fibrous paper suspensions and process for making same Process for manufacturing screens and screens suitable for use in wet screening fibrous paper suspensions, in which the screens include at least one screen plate having a number of sorting apertures. The process includes providing a number of fastening openings in t... | 06/14/2005 |
| RE38738 | Cylindrical screen, particularly for paper pulp Cylindrical screen, particularly for paper pulp, of the type comprising at least one filtering element (10) positioned between two flanges (1, 2) by means of a number of bars (3). The filtering element is composed by wires (10) placed sid... | 05/31/2005 |
| 6883669 | Multi-element airfoil for pulp screens A the operation of pulp screening apparatus may be improved by employing a multi element foil having a leading foil section and a trailing foil section spaced from and trailing leading section so that adjacent surfaces of the sections one formed by a portion of a pr... | 04/26/2005 |
| 6868971 | Solids/liquids separator A separator for separating solids and other objects (debris) from a liquid, and having a separator body (2) through which the liquid, having debris entrained therein (16, 19, 20), flows from an inlet (6) to an outlet (13), and a port (... | 03/22/2005 |
| 6726022 | Screening device and rotor for use in a screening device Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject p... | 04/27/2004 |
| 6679384 | Method and means for paper pulp filtering Process for the filtration of paper pulp with a device that comprises a rotor and a stator; one of the two, filter (1), has perforations of slot or hole types, and the other, the backwashing element, includes means that are intended to generate pressure p... | 01/20/2004 |
| 6669025 | Screen A screen for cleaning a pulp suspension including an additional screen basket in the infeed area for pre-screening.... | 12/30/2003 |
| 6631809 | Screen for cleaning a pulp suspension A screen for cleaning a pulp suspension includes a stationary installation in the infeed area between the infeed branch and the free end of the rotor.... | 10/14/2003 |
| 6588599 | Screen for pulp processing A screen, for screening material used in the production of paper, board and the like, having a screen basket and a rotor supporting several blades which can be moved along the wall of the screen basket when the rotor rotates. The blades having a convex cu... | 07/08/2003 |
| 6571957 | Screening apparatus for fiber suspension A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension includes a housing and a rotor within the housing. The rotor has a top end. A screen basket is positioned generally concentrically around the rotor.... | 06/03/2003 |
| 6530481 | Pressure screen with scrap separation A pressure screen for separating a liquid mixture is disclosed, comprising a screen housing forming a cylindrical screen chamber, and an inlet housing directly connected to the screen housing and forming a cylindrical inlet chamber, the diameter of which ... | 03/11/2003 |
| 6530482 | Tandem shale shaker A tandem shale shaker having at least a base, at least one upper shaker screen, at least one lower shaker screen, a basket, an apparatus for vibrating the basket, at least one distribution conduit, a flowback pan, a flow director, and a distribution appar... | 03/11/2003 |
| 6499603 | Screen for cleaning pulp suspensions A screen for cleaning a pulp suspension including a cylindrical screen basket and a double-conical accept chamber which widens in the flow direction of the pulp suspension.... | 12/31/2002 |
| 6491168 | Pulp screen basket A pulp screening assembly where each support ring is weldlessly bonded to a perforate screen section by a bonding material that preferably is a brazing material. There is a joint between each ring and a screen section in which brazing material is disposed... | 12/10/2002 |
| 6409023 | Process and device for fractioning a suspension containing paper fibers Process and device for fractioning a suspension containing paper fibers, in which the suspension is separated into at least two fractions by a wire with a scraper. The process includes moving the scraper in a substantially parallel relation to the wire so... | 06/25/2002 |
| 6360897 | Screen device comprising two screen chambers for separating fiber suspensions A screen device for separating fiber suspensions comprises a screen (40) defining a central chamber (36), and a rotor (15) in the central chamber having a first (21) and a second (27) rotor portion, respectively, provided with first (43) and second (41) p... | 03/26/2002 |
| 6348130 | Variable pressure screening Pressure type screening apparatus for screening papermakers' stock and method of use is disclosed. Screen (20) has an inlet screening surface (23) and an outlet surface (unlabled). Pressure transducers (not shown) vary the fluid pressure on the inlet surf... | 02/19/2002 |
| 6338412 | Cylindrical screen, particularly for paper pulp Cylindrical screen, particularly for paper pulp, of the type comprising at least one filtering element (10) positioned between two flanges (1, 2) by means of a number of bars (3). The filtering element is composed by wires (10) placed side by side and hel... | 01/15/2002 |
| 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 |
| 6311850 | Pressure screening apparatus for screening a paper stock suspension and screen clearer for such a screening apparatus A pressure screening apparatus for screening a stock suspension and screen clearer for a pressure screening apparatus. The pressure screening apparatus includes an inflow chamber, a suspension inflow connected to one end of the inflow chamber, a reject ou... | 11/06/2001 |
| 6290067 | Screening apparatus with dilution liquid supply means Screening apparatus is disclosed for separating fiber suspensions comprising a housing having an inlet for the fiber suspension, a stationary tubular screen dividing the interior of the housing into a central chamber for receiving the fiber suspension fro... | 09/18/2001 |
| 6273266 | Process for the wet screening of stock suspensions in pressure graders and pressure graders screen Process and pressure grader screen for wet screening stock suspensions. The process includes conducting the stock suspension along the screen, so that break-away eddies are formed on an inflow side of the screen, separating portions of the stock suspensio... | 08/14/2001 |
| 6260709 | Membrane filter element for chemical-mechanical polishing slurries A filter media for physically separating particles of an abrasive media having a given mean average particle size from a chemical-mechanical polishing (CMP) slurry. The abrasive media has a particle size distribution including particles larger than the me... | 07/17/2001 |
| 6241102 | Screening device Apparatus is disclosed for screening fiber suspensions including a housing, an annular screen disposed within the housing, a rotor disposed within the annular screen for rotating relative to the annular screen, pulsation wings disposed between the outer s... | 06/05/2001 |
