Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7387708 | Process for feeding pulp into a blow tank or storage tank A method and apparatus for treating pulp in connection with a blow tank or a storage tank. The pulp is discharged from a batch digester and fed either to the upper or the lower part of a blow tank, depending on the consistency of the pulp being discharged from the d... | 06/17/2008 |
| 7381303 | System and method for controlling a thermo-mechanical wood pulp refiner Thermomechanical pulp is an important process for producing fibrous mass used in papermaking. A two-level control strategy that stabilizes and optimizes the refining process has been developed. The Stabilization layer consists of a multivariable model predicative ra... | 06/03/2008 |
| 7381302 | Method and arrangement for impregnating chips The method and an arrangement are for improved impregnation of chips in association with the manufacture of chemical cellulose pulp. Un-steamed chips are fed into an impregnation vessel (30) in which a fluid level (LIQ_LEV) is established under the highest le... | 06/03/2008 |
| 7294227 | Method and system for the treatment of pulp prior to ozone bleaching A system for treating pulp comprises a dewatering device (2) for dewatering the pulp to a fiber concentration of at least 20%, a closed pulp-shredding vessel (16) for shredding the dewatered pulp, and an outlet pipe (22) from the pulp-shredding ... | 11/13/2007 |
| 7204914 | System and method for controlling a processor including a digester utilizing time-based assessments A system for controlling a processor having at least one sampling port connected to a stage of the processor in order to sample a reactant product from the processor. The system includes a controller configured to control a processing parameter of the processor base... | 04/17/2007 |
| 7145465 | Liquid level sensor having a virtual ring A liquid level sensor for conductive liquids having a virtual bias ring to prevent false “full” indications. The sensor is an inexpensive conductive probe that can be installed in any tank or container used to contain a conductive liquid. The build up of residue... | 12/05/2006 |
| 7082348 | Computer based method and system for controlling an industrial process A computer based method for controlling an industrial process that includes at least two unit processes, including the steps of directly controlling the process by a control model including one or more algorithms, and automatic diagnosis of the validity of the proce... | 07/25/2006 |
| 6778936 | Consistency determining method and system A system (30) and method for determining stock consistency and for using consistency as a process variable to control some aspect of operation of a refiner (32) used to refine stock. The system includes at least one sensor (70 or 180) fro... | 08/17/2004 |
| 6772036 | Control system using process model A control system is provided for controlling a process for making paper or paper pulp. The process has a process product output at an end of the process. The controls include a process variable sensor input configured to receive a process variable related to the pro... | 08/03/2004 |
| 6447639 | Process for controlling a digester using real time measurement of moisture content and species of wood An on-line pulp digester control system. More particularly, this invention pertains to a control system which employs real time measurements from ion mobility spectrometry to automatically rapidly and continuously determine the physical and chemical chara... | 09/10/2002 |
| 6368453 | Chip feeding to a comminuted cellulosic fibrous material treatment vessel In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated with... | 04/09/2002 |
| 6273994 | Method and device for measuring bleach requirement, bleachability, and effectivenss of hemicellulase enzyme treatment of pulp The present invention relates to a device and method for measuring the bleach requirement and bleachability of pulp in a pulp mill. The invention enables pulp mill operators to better control bleach plants. In one aspect, the invention comprises a system ... | 08/14/2001 |
| 6238517 | Method for controlling oxygen delignification of pulp Methods of controlling oxygen delignification processes are disclosed including providing chemicals for a first oxygen delignification step, conducting the first oxygen delignification step with the chemicals, conducting a second oxygen delignification st... | 05/29/2001 |
| 6210532 | Means for conveying pulp having differential pressure control A walled passageway, having openings therein only at opposite, inlet and outlet ends thereof, has a shaft journalled therein. The shaft carries a screw thereon for moving shredded pulp through the passageway. The screw is foreshortened, having a length le... | 04/03/2001 |
| 6153050 | Method and system for controlling the addition of bleaching reagents to obtain a substantially constant percentage of pulp delignification across the first bleaching/delignifying stage A method for controlling the addition of bleaching/delignifying reagents to obtain a substantially constant percentage of pulp delignification across the first bleaching stage. The present method allows substantial improvements in bleached pulp quality th... | 11/28/2000 |
| 6143134 | Chip spreader for air-lock feeder By establishing a relatively flat, for example, non-sharply conical, top profile of wood chips in a treatment vessel (such as a chip bin), the chips will be more uniformly steamed or otherwise treated (or have the treatment time of the chips extended) com... | 11/07/2000 |
| 6132556 | Method of controlling pulp digester pressure via liquor extraction A method of controlling the pressure of a vertical continuous comminuted cellulosic fibrous material (wood chip) digester is provided using a pressure-control extraction in a zone relatively insensitive to changes in the flow rate of liquid introduction o... | 10/17/2000 |
| 6017420 | Apparatus for automated monitoring of pulp retention time using an iodine salt tracer An automated tracer system and method for measuring the residence time of wood pulp as it moves through various stages of processing in a pulp mill. A tracer compound comprising a neutral salt of a halogen is introduced into a first location in the path o... | 01/25/2000 |
| 5995701 | Optical-fiber environment variable apparatus, optical-fiber extracting apparatus, and optical-fiber extracting system To enable extraction of one specific optical fiber from a plurality of optical fibers at remote sites. An environment variable apparatus is mounted to provide a temperature difference at a predetermined position of an optical fiber. An environment variabl... | 11/30/1999 |
| 5824188 | Method of controlling the pressure of a continuous digester using an extraction-dilution The sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of cellulose pulp is selectively increased. After treatment in a first treatment zone in which impregnation or kraft cooking takes place using a kraft cooking liquor ... | 10/20/1998 |
| 5755928 | Method for automated monitoring of pulp retention time using an iodide salt as a tracer An automated system and method for measuring the residence time of wood pulp as it moves through various stages of processing in a pulp mill. A tracer compound comprising a neutral salt of a halogen is introduced into a first location in the path of the p... | 05/26/1998 |
| 5736004 | Control scheme for rapid pulp delignification and bleaching A process control method for adjusting chemical application in response to the pulp brightness and/or lignin content is realized by utilizing a coupled control feedforward, feedback or combination feedforward/feedback control system, wherein brightness me... | 04/07/1998 |
| 5674360 | Method and apparatus for steam packing/presteaming a batch digester A batch digester loading method is described wherein a flow stream of steam enters the digester near the bottom thereof as a flow stream of wood chips enters through the top filler neck. Steam flow begins in the bottom portion of the digester at an initia... | 10/07/1997 |
| 5672247 | Control scheme for rapid pulp delignification and bleaching A process control for adjusting bleaching agent application in response to the pulp brightness and/or K number is realized by utilizing a coupled control feedforward and/or feedback control system or combination thereof wherein brightness measurements are... | 09/30/1997 |
| 5635025 | Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chute In a continuous digester system the chip feed equipment is greatly simplified by substituting a single vertical vessel for the conventional chip bin, steaming vessel and chip chute. An outlet at the bottom of the single vessel is connected, through a low ... | 06/03/1997 |
| 5632859 | Intergral pulp mill and method of constructing an integral mill A mill for the processing and production of wood pulp is contained substantially entirely within a single, integral structure that defines a unitarily-covered space substantially bounding and enclosing the mill. The mill includes a main control room or st... | 05/27/1997 |
| 5622598 | Chip pumping to a digester A system for feeding wood chips entrained in cooking liquor to a high pressure feeder connected to a continuous digester includes a vertical treatment (e.g. steaming) vessel, a metering device connected to the discharge from the steaming vessel, a general... | 04/22/1997 |
| 5616214 | Determination of sodium sulfide and sulfidity in green liquors and smelt solutions A rapid method is provided for the on-line determination of sodium sulfide concentration and/or percent sulfidity in green liquors or smelt solutions used for the production of either kraft or sulfite pulp. The method eliminates manual sampling, and the n... | 04/01/1997 |
| 5582684 | Method of determining degree of reduction in a sulfate liquor using IR and UV spectroscopy The invention relates to a method of determining the concentration of sulfide and optionally also of polysulfide in liquors and solutions of smelt deriving from the sulfate process. According to the method, the concentrations are determined by measuring t... | 12/10/1996 |
| 5547546 | Chip bin with steaming control and a gas vent containing a vacuum and pressure relief device A chip bin for wood chips in a continuous digester system includes internal steaming that is controlled in response to both the interior temperature across the level of chips in the bin, and the level of chips in the bin, so as to substantially prevent co... | 08/20/1996 |
| 5547545 | Digester temperature distribution control system A digester temperature distribution control system comprises an optical fiber type temperature measuring unit utilizing the Raman scattering effect, reference temperature measuring unit, reference point temperature setting unit, measured temperature distr... | 08/20/1996 |
| 5476572 | Chip feeding for a continuous digester A chip feeding system for a continuous digester provides for a greater rate of delivery of chip slurry to the digester, and is much less expensive than conventional chip feeding systems, typically being only 40-50% of the height of the conventional system... | 12/19/1995 |
| 5401361 | Completely coutercurrent cook continuous digester A conventional continuous digester is modified so as to provide a countercurrent cook throughout the entire height of the digester. Instead of connecting an upper mid-point extraction screen to a flash tank, that screen is closed off and extraction is pro... | 03/28/1995 |
| 5382326 | Ozone mixing test apparatus Laboratory equipment for practicing experiments and mixing ozone with medium consistency cellulosic pulp allows precise control of the timing and amount of ozone injected into the mixer, providing a method of testing that is more accurate than prior metho... | 01/17/1995 |
| 5364505 | Pressurized ozone pulp delignification reactor and a compressor for supplying ozone to the reactor A method and apparatus supply ozone containing gas under superatmospheric pressure to an ozone delignification device. The speed of a water ring compressor is controlled so that it compresses as much ozone gas per unit time at desired superatmospheric pre... | 11/15/1994 |
| 5308504 | Viscosity based tank level and flow control systems Tank level and flow control systems wherein the presence of materials or solutions of known viscosity ranges in a tank or flow stream is detected by using viscosity detection devices. Automatic control devices are also incorporated into these systems to r... | 05/03/1994 |
| 5282931 | Determination and control of effective alkali in kraft liquors by IR spectroscopy A direct monitoring and control method is provided for on-line measurement of effective alkali, carbonate, sulfate and thiosulfate concentrations in process liquors for the production of kraft pulp. The control method eliminates frequent sampling, and the... | 02/01/1994 |
| 5167769 | Particle level sensor A sensor for the detection of wood chip level in a digester, for example, a Kamyr digester, which consists of: (a) a probe, several meters long, vertically mounted inside the top part of the digester; (b) a series of bare metal electrodes in the side of t... | 12/01/1992 |
| 5093773 | Processing system with heat recovery A processing system utilizing heat recovery has a plurality of digesters in which products such as wood chips may be reacted at high temperature and pressure to form pulp suitable for use in the manufacture of paper. The digesters are fluidly connected to... | 03/03/1992 |
| 5032977 | System for modeling and control for delignification of pulping A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and... | 07/16/1991 |
