Abstract: A crusher having (a) a crusher frame, (b) a crusher rotor with teeth supported on the crusher frame, (c) counter-blade structures within the crusher frame; and (c) upper and lower hatches. The crusher rotor and the counter-blade structures are configured within the crusher so that material fed into the crusher frame can be crushed between the crusher teeth and the counter-blade structures. The upper and lower hatches are hinged to the crusher so that the hatches can be separated to provide an opening through which foreign material may be removed from the crusher while preventing material feeding into the crusher rotor from flowing out of the crusher.

Abstract: A crusher comprising a box-like crusher frame with two end walls and two side walls connecting the end walls; at least one crusher rotor that is supported for a rotating movement inside the crusher frame against its end walls; the circumference of the crusher rotor having a plurality of crusher teeth and the crusher having counter-blade structures arranged to cooperate with the crusher teeth of the crusher rotor, and the material fed into the crusher for crushing being intended to be fed essentially above the centre line of the rotor(s) and to be crushed between the crusher teeth of the crusher rotor and the counter-blade structures; wherein two hatches are arranged on at least one side wall side of the crusher, the first hatch being above the centre line of the crusher rotor and pivoted at its top part to the crusher to be turnable toward the centre line of the crusher, and the second hatch being mainly below the centre line of the crusher rotor and movable away from the front of the crusher rotor.

Abstract: The narrow-scale moisture profile of a paper web is controlled by profiling nozzles (11) of a profiling device (10) which cover part of the width of the web and desired variations of the moisture profile are corrected by the profiling nozzles (11). Coating quantity profile of a paper web may also be controlled. The narrow-scale coating quantity profile is controlled by profiling nozzles (11) of a profiling device (10) which cover part of the width of the web and desired variations of the coating quantity profile are corrected by the profiling nozzles (11). The device (10) for controlling the moisture profile or the coating quantity profile of a paper web has profiling nozzles (11) for controlling narrow-scale moisture profile variation, which cover a desired part of the width of the web, to correct desired variations occurring in the profile in the width direction of the web.

Abstract: The narrow-scale moisture profile of a paper web is controlled by profiling nozzles (11) of a profiling device (10) which cover part of the width of the web and desired variations of the moisture profile are corrected by the profiling nozzles (11). Coating quantity profile of a paper web may also be controlled. The narrow-scale coating quantity profile is controlled by profiling nozzles (11) of a profiling device (10) which cover part of the width of the web and desired variations of the coating quantity profile are corrected by the profiling nozzles (11). The device (10) for controlling the moisture profile or the coating quantity profile of a paper web has profiling nozzles (11) for controlling narrow-scale moisture profile variation, which cover a desired part of the width of the web, to correct desired variations occurring in the profile in the width direction of the web.

Abstract: The invention relates to an air impingement system arranged outside the jacket of an air impingement roll in the drying section of a paper machine or the like for heating and drying a web travelling around the said air impingement roll. The air impingement system comprises a mainly closed hood, which has control means for directing air onto the paper web. From the hood, air is directed by blowing with at least one fan to the blower nozzles and back again into the said hood as a circulation air process, and the system incorporates at least one heating device for heating the air. The air impingement system's hood and its said equipment are used in conjunction with an air impingement roll, which is of the size of approximately 1.5–2 m in diameter. The hood of the air impingement roll is at maximum 5 m high, preferably only 1.5–2.5 m high.

Abstract: A method of blowing drying gas against a paper web, and an impingement dryer of a paper machine. Drying gas is blown with an impingement dryer comprising several profiling chambers in the cross-direction of a paper machine, the cross-profile of the paper web being controlled with the drying gas blown from the profiling chambers. Each profiling chamber blows drying gas to its own effect range. The impingement dryer further comprises a return air chamber and return air ducts such that drying gas blown against the paper web from the profiling chambers is returned into the return air chamber through the return air ducts in such a way that some of the effect of the drying gas blown from the profiling chamber is at least partly prevented from reaching the effective area of the adjacent profiling chamber.

Abstract: A method of blowing drying gas against a paper web, and an impingement dryer of a paper machine. Drying gas is blown with an impingement dryer comprising several profiling chambers in the cross-direction of a paper machine, the cross-profile of the paper web being controlled with the drying gas blown from the profiling chambers. Each profiling chamber blows drying gas to its own effect range. The impingement dryer further comprises a return air chamber and return air ducts such that drying gas blown against the paper web from the profiling chambers is returned into the return air chamber through the return air ducts in such a way that some of the effect of the drying gas blown from the profiling chamber is at least partly prevented from reaching the effective area of the adjacent profiling chamber.

Abstract: The invention relates to an air impingement system arranged outside the jacket of an air impingement roll in the drying section of a paper machine or the like for heating and drying a web travelling around the said air impingement roll. The air impingement system comprises a mainly closed hood, which has control means for directing air onto the paper web. From the hood, air is directed by blowing with at least one fan to the blower nozzles and back again into the said hood as a circulation air process, and the system incorporates at least one heating device for heating the air. The air impingement system's hood and its said equipment are used in conjunction with an air impingement roll, which is of the size of approximately 1.5-2 m in diameter. The hood of the air impingement roll is at maximum 5 m high, preferably only 1.5-2.5 m high.

Abstract: A method and apparatus effect drying of a paper web using a plurality of heated drying cylinders and at least one air impingement module having a hood. The paper web is brought into operative contact with the heated drying cylinders, and at least one of the final moisture content, quality, and cross-direction profile of the paper web is regulated. The regulation is effected by adjusting the efficiency of air impingement drying of the paper web, by adjusting at least one of the blowing velocity of the medium (typically air) blown against the paper web, the humidity of the blowing medium, and the distance of the hood of the impingement module from the paper web. At least one of the final moisture content of the paper web and its quality may also be regulated by adjusting the steam pressure of one or more drying cylinder groups.

Abstract: A method and device effect controlled uniform temperature drying of a wet web, such as a paper web substantially immediately after formation in a paper machine, without damaging the supporting fabric carrying the web. The web has a central region and first and second border regions. The wet web to be dried is conveyed on a conventional supporting fabric/wire in a first direction generally parallel to the web border regions, and in a hood drying air is blown against the web from the opposite side thereof as the supporting fabric so that the drying air picks up moisture and becomes moistened air. The moistened air is discharged from the volume adjacent the hood, for example is discharged from at least one hood positioned at and encompassing an impingement surface over which the web and supporting fabric pass. Air supplied for blowing against the web is heated to raise its ability to retain moisture.

Abstract: An apparatus for straightening suspension bars removed from cathode plates includes a horizontal press, a vertical press, a vertically movable stop plate, and an ejector in the horizontal press. The horizontal press pushes the suspension bar against the stop plate when the stop plate is in its upper position, and ejects the straightened suspension bar laterally when the stop late is in its lower position.