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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
A. Ahlstrom Osakeyhtio Patents
Assignee:
A. Ahlstrom Osakeyhtio
Address:
Noormarkku, FI
No. of patents:
64
Patents:


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Patent Number Title Of Patent Date Issued
D281432 Chipping blade November 19, 1985
D277079 Bottle or similar article January 8, 1985
D266725 Goblet or similar article November 2, 1982
D266650 Bottle October 26, 1982
D266595 Combination candlestick and bowl October 19, 1982
D266594 Candlestick October 19, 1982
D266535 Combination candlestick and bowl October 12, 1982
D266046 Tumbler or similar article September 7, 1982
D264384 Candlestick May 11, 1982
D264035 Goblet April 27, 1982
D263544 Combined beverage cup and holder March 30, 1982
D262253 Combined beverage cup and holder December 15, 1981
D259984 Goblet or similar article July 28, 1981
D259845 Goblet or similar article July 14, 1981
D258337 Tumbler or similar article February 24, 1981
D257936 Ice cube tongs or similar article January 20, 1981
D244064 Plate April 19, 1977
5141720 Catalyst bed for exothermal reactions between gases and/or other fluids August 25, 1992
A catalyst bed for conducting exothermal reactions between gases and/or other fluids is disclosed. The catalyst bed includes at least two cooling elements arranged in parallel relationship with each other. A space is thereby defined between the two cooling elements, and one opening at ea
4874584 Fluidized bed reactor October 17, 1989
A fluidized bed reactor in which the gases flowing tangentially through a pipe from the upper part of the reactor chamber to a cyclone separator are discharged through a discharge pipe of the separator. The discharge pipe is arranged to go through the bottom of the cylindrical vortex cha
4867948 Fluidized bed reactor September 19, 1989
A fluidized bed reactor in which the gases flowing tangentially through a pipe from the upper part of the reactor chamber to a cyclone separator are discharged through a discharge pipe of the separator. The bottom of the cylindrical vortex chamber of the separator is substantially planar
4687146 Apparatus for fiberizing and screening of fibrous materials August 18, 1987
An apparatus for fiberizing and screening of fibrous material, which comprises of a rotating drum (1) the drum wall (2) of which consists of a non-perforated (7) and a perforated (8) part. The non-perforated part in the inlet end of the drum is separated from the perforated part in the
4619736 Apparatus for defiberizing, screening and pumping cellulose pulp or recycled paper October 28, 1986
Cellulose pulp or recycled paper is defiberized, screened and pumped. Initial defiberizing, separation of non-disintegrated material, final defiberizing and pumping of the defiberized pulp are performed at a consistency of 6 to 18%, preferably 8 to 12%. Preferably all operations are
4607212 Method and apparatus for detection of knots or the like in sawn lumber August 19, 1986
A method and an apparatus for detection of knots in lumber by means of microwave radiation. Radiation from a transmitter is directed toward a piece of lumber and the radiation reflected from and/or passed through the piece of lumber is detected by means of a receiver. A radiation field
4594052 Centrifugal pump for liquids containing solid material June 10, 1986
A centrifugal pump for liquids containing solid material, the impeller of which has two or several vanes. In a bottom projection the leading edge (3) of the impeller (1) vane (2) is curved backwards in relation to the rotating direction of the impeller. The angle between the leading edge
4558477 Process for washing fibre stock December 17, 1985
A process for washing fibre stock. The fibre stock is described is passed along a passage 14 from a stock inlet 15 to a stock outlet 16. The passage is defined by a portion of the inner surface of a substantially horizontal cylindrical screen 4, preferably a wire gauze. Washing liquid su
4557802 Apparatus for affecting a web drained on a wire December 10, 1985
An apparatus for affecting a web drained on a wire, comprising a lower wire which runs as an endless loop; disposed transverse members which supporting the lower wire, disposed at a distance from each other; an upper wire which runs as an endless loop and presses the web formed on the
4557120 Apparatus for washing fibre stock December 10, 1985
A process and apparatus for washing fibre stock. The fibre stock is passed along a passage 14 from a stock inlet 15 to a stock outlet 16. The passage is defined by a portion of the inner surface of a substantially horizontal cylindrical screen 4, preferably a wire gauze. Washing liquid s
4554052 Method and apparatus for web forming November 19, 1985
A method and apparatus for forming a web wherein a fiber suspension from a head box is fed on a section of a forming wire formed by a first, substantially horizontal dewatering zone, and where the web being formed is thereafter led to a second dewatering zone where an upper wire is c
4552619 Thermal stabilizing system for a headbox of a papermachine November 12, 1985
The outer walls of the beams of a papermachine headbox are heated by means of heat transferred from the stock to a temperature equal to that of the inner walls in contact with the stock. This is preferably carried out so that the liquid which is circulated in a closed liquid circulation
4534151 Method and apparatus for packaging paper rolls August 13, 1985
A method and an apparatus for packaging paper rolls (2), wherein a wrapper sheet (1) of such a size as to exceed the axial length of the roll is wrapped around the roll and the width of the wrapper sheet is reduced to a size corresponding to the length of the roll by removing the part (5
4533433 Method of covering the chemical losses in pulp production August 6, 1985
A method for keeping the heating surfaces in the final thickener (VI), which is divided into several sections (A,B,C), clean in evaporating waste liquors in pulping processes for recovering the cooking chemicals. Chemical solutions e.g. residual products from other processes as tall oil
4529520 Screen plate July 16, 1985
A screen plate with grooves is described. The grooves are provided at the bottom with perforations. The direction of the grooves substantially deviates from the flow direction of the pulp to be screened. By different inclination of the side planes of the grooves the turbulance force on t
4524901 Sliding two-piece box with tear strip June 25, 1985
A two-piece box consisting of a mantle-like outer part and, disposed inside the outer part, an inner part intended to be entirely or partly pulled out from the outer part and wherein the inner part and the outer part are attached to each other by means of a tear strip. The box is formed
4524900 Two-piece sliding box with tear strip separation June 25, 1985
A two-piece box consisting of a mantle-like outer part and, disposed inside the outer part, an inner part intended to be entirely or partly pulled out from the outer part and wherein the inner part and the outer part are attached to each other by means of a tear strip. The box is formed
4518500 Apparatus for treating a fibrous material May 21, 1985
An apparatus for treating a fibrous material, e.g. for fiberizing and screening of waste paper, comprises a rotating drum which is provided with at least one partially perforated mantle and is divided into consecutive treating zones by means of a partition wall or walls. In connection wi
4514680 Flaw detection system using microwaves April 30, 1985
A method and an apparatus for detection of flaws in lumber is provided, in which the lumber is subjected to microwave radiation of equal intensity in turns simultaneously from two microwave radiation means in phase opposition and from an intermediate microwave radiation means and between
4505211 Method for drying aqueous, solid fuels March 19, 1985
Method for drying aqueous solid fuels, in which method the fuel is heated indirectly in a dryer by means of a heating medium heated in a boiler plant or the like and in which the steam formed in the dryer serves as a heating and transport medium. Oil or some other liquid having a boiling
4500835 Method and apparatus for detecting grain direction in wood, particularly in lumber February 19, 1985
A method and apparatus for detecting grain direction in wood particularly in lumber by means of high frequency radio energy like microwave radiation. The grain direction in lumber can be detected so that knots will cause no significant error to the measuring result. The knots are det
4485646 Apparatus for washing fiber stock December 4, 1984
Apparatus for washing fiber stock, comprising a substantially horizontally disposed rotating screen drum, means for supplying fiber stock to one end of said screen drum for passage along the screen surface through said screen drum, means for removing fiber stock from the other end of sai
4461700 Rotary feeder July 24, 1984
A rotary feeder for simultaneous screening and discharging of material from the bottom part of a fluidized bed reactor. The rotary feeder is provided with a rotor having blades, between which pockets are formed. In the rotary feeder there is disposed an air inlet and an air outlet for
4459907 Press for removing water July 17, 1984
Press for removing water, wherein the material to be treated is led together with a wire which is pervious to water through a press nip zone formed by opposite surfaces. The press comprises compressible means for transporting the material to be treated. This means runs through the press
4458567 Method for orienting a log July 10, 1984
A method for orienting a log, supported by rotating means, which is to be fed into a saw or a similar device. The upper edge line of the log profile is surveyed by two cameras placed in such a symmetrical position above the log that a line from the camera to the log in the feed plane for
4456750 Method for controlling the alkalinity of feed circulation when prehydrolyzing wood chips June 26, 1984
A method for controlling the pH of the liquid circulation in a continuous prehydrolysis apparatus where a mineral acid or some other acid stronger than sulfurous acid is used as a hydrolysis agent and the material to be hydrolyzed is transferred, entrained in the liquids of a first and a
4449557 Method and apparatus for sawing a piece of timber May 22, 1984
A method and an apparatus for sawing a piece of timber and particularly for edging a board. The piece of timber is brought to pass in its longitudinal direction through a measuring station and further, maintaining its position, to a sawing machine. The optimum width and sawing direction
4435122 Method and apparatus for pumping fiber suspensions March 6, 1984
The disclosure describes a method and a device for pumping fiber suspensions of high consistency. Shear forces disrupting fiber flocs are induced near the front edge of the vanes of the impeller in a centrifugal pump which fluidize the fiber suspension hereby converting it into an ea
4432835 Method and an apparatus for the feeding of a fibre suspension onto the wire of a web former February 21, 1984
A method and apparatus for feeding a fibre suspension onto the wire of a web former through a guiding device consisting of a plurality of guiding channels through which the fibre suspension flows parallelly and which are connected to a slice chamber leading to a slice and extending acros
4430694 Arrangement for mounting lighting fixtures February 7, 1984
An arrangement for mounting lighting fixtures is provided. The lighting fixture or a plurality of lighting fixtures in a row are mounted on carriages movably disposed on a horizontal rail. The lighting fixtures can be moved from an operating position to a maintenance position by means of
4426257 Damping system for a paper machine headbox January 17, 1984
A system for damping the pressure fluctuations in a paper machine headbox. The headbox applying the damping system comprises an equalizing chamber communicating with an air space, this equalizing chamber having an outlet/outlets for a channel/channels leading to the equalizing chamber as
4416422 Steplessly adjustable device for injecting black liquor into a soda digester November 22, 1983
In a device for adjusting the flow quantity and drop size of black liquor to be injected into a soda digester, an outflow opening with an adjustable cross-sectional area, relatively rotatable coaxial outer and inner pipes, the outer pipe being provided with an end piece covering a part o
4410337 Method and an apparatus for separating a gas from a fibre suspension October 18, 1983
Gas is removed from a fibre suspension of high consistency by means of an apparatus having a rotor chamber and a rotor disposed for rotation in the rotor chamber. The rotor has blades adapted to fluidize the fibre suspension and to cause a centrally located core of gas surrounded by a
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