Abstract: A nonwoven laminate having at least two nonwoven layers is made by first spinning, cooling, and stretching, first crimped multicomponent filaments to form a first nonwoven web that is deposited on a deposition device. Then second continuous continuous filaments including an elastomer based on polypropylene are spun, cooled, and stretched to form a second nonwoven web that is deposited on the first nonwoven web and thereby forming the nonwoven laminate that it then consolidated.

Abstract: A method for controlling the temperature of a heated roll in a calender is provided. The calender comprises at least one heated roll or thermoroll and at least one backing roll, between which is formed a nip through which the material web is conveyed. To the heated roll is supplied internal thermal power by internal heating means of the roll, and external thermal power by external heating means of the roll. Before changing the heated roll, internal thermal power is minimized within a specific period by control means provided in conjunction with the internal heating means; external thermal power is maximized within a specific period by control means provided in conjunction with the external heating means; and the surface temperature of and/or the thermal power released by the heated roll, which corresponds to the surface temperature and/or thermal power desired for the grade of the material web, is maintained within a specific period.

Abstract: A device for heating a roll in a paper or paperboard machine or in a finishing machine for paper or paperboard the device including a profiling induction heater (5) which is arranged to heat the roll (3) with a power dependent on the location of the point to be heated in the axial direction of the roll, and a non-profiling induction heater (4) which, to provide basic heating, is arranged to heat the same roll (3) with a heating power which is substantially even over the width of the roll (3). The profiling induction heater (5) and the non-profiling induction heater (4) are placed in the same support structure (1) outside the roll (3). The roll (3) is a calender roll.

Abstract: Device for producing a paper having a three dimensional pattern which has been given the paper web in connection with drying the paper web. The device comprises at least one press nip (12) comprising a rotatable heated roll (13) and a counter means (11,14), at which either the heated roll (13) along its periphery alternatively a member surrounding the roll or a patterned wire, band or belt is provided with said three dimensional pattern, and wherein the wet paper web (10) is intended to pass through said press nip (12) and is given said pattern A detaching roll (16) is arranged at a certain distance from the press nip (12) for taking off the paper web from the heated roll (13), and creping means (17) are arranged for creping the paper from said detaching roll (16).

Abstract: A method and apparatus for rapid heating of calender rolls 350, 352 for a calendering apparatus 200 is disclosed. At a heating area 800, the rolls 350, 352 are preheated, reheated, or maintained at any temperature prior to the rolls 350, 352 being placed into the calendering apparatus 300. The preferred method of heating is by induction heating. The rolls 350, 352 may be delivered to the heating apparatus 802 from an initial storage area 420 or the calendering apparatus 300. The rolls 350, 352 are transported by an overhead transfer mechanism 400. The disclosed method and apparatus greatly facilitate formation of multi-layered laminates and is particularly useful in the tire building art.

Abstract: The invention relates to an assembly for positioning a heater in relation to a roll, wherein the roll (101) has a substantially cylindrical shape with a shall surface (103), rotatable around a shell axis (102), at a first distance (104) from the shell axis (102). The heater (105) comprises at least one heater section (106, 106′, 106″) intended for heating the shell surface (103), and is supported via a suspension attachment (107) by means of a supporting means (108) on a variable, second distance (109) from the shell axis (102). Thereby, the heater section (106, 106′, 106″) is furnished with at least one distance control means (110, 110′) arranged for being in contact with the shell surface (103) during the heating and for automatically regulating the second distance (109) by means of a self-regulating mechanism.

Abstract: Method for influencing relevant quality parameters of a rolling strip, particularly the profile or flatness of the rolling strip, in a roll stand with rolls, by adjusting the crownings of the rolls, i.e., the surface geometry of the rolls in the longitudinal direction of the rolls, wherein the crowning of the rolls is adjusted by an adjustable cooling of the rolls or of their surfaces in longitudinal direction of the rolls. The cooling of the rolls is adjusted by a controller (1) as a function of the actual value (pactual) of the crowning and a predetermined setpoint value (psetpoint) of the crowning.

Abstract: A calender press for use in a paper-making machine includes a top roll positioned adjacent to a nip and rotatable about a longitudinal axis thereof. The top roll has a length and circumferential perimeter. The length extends in the direction of and is longer than the width of the fiber web. The top roll is thermally compensated in a plurality of thermal zones which are adjacent to each other across the length of the top roll, whereby the perimeter of the top roll may be adjusted in a locally adjustable manner toward and away from the nip. A bottom roll is positioned adjacent to the top roll and defines the nip with the top roll. The bottom roll is rotatable about a longitudinal axis thereof and has a length and circumferential perimeter. The length extends in the direction of and is longer than the width of the fiber web. The perimeter is smaller at each longitudinal end of the bottom roll and larger at approximately a midpoint between the longitudinal ends, thereby defining a crowned bottom roll.

Abstract: Method in calendering of a paper web in which the paper web is conveyed through a calendering nip formed by two calender rolls, at least one of which is a soft-faced roll having a coating of a resilient or polymeric material, or over which a belt of resilient or polymeric material is directed and passed through the nip. The profile of the calendering nip is controlled to compensate for defects in the web entering the calender. The profile control is accomplished by changing the diameter of the soft-faced roll zonewise by a profile control device arranged inside the body and performing temperature profiling. The profile control device include temperature control elements such as heating elements located in zones for heating a heat transfer medium such as air supplied into the body.

Abstract: A method and apparatus for producing calendered paper by an on-line manufacturing system comprising at least a paper machine and a multi-nip calender. The method comprises following steps: removing water from a formed paper web by pressing, drying the pressed paper web by at least one dryer, calendering the dried web by the multi-nip calender, measuring a cross-machine moisture profile or a variable relative thereto, and altering the moisture of the web so that the moisture profile of the web in the cross-direction is even when the web enters the first nip of the calender.

Abstract: A gloss control system especially for use on a super calender roll system uses controllable jets of heated air arranged along the segment of a calender roll not in contact with a paper web to both control the overall gloss level and equalize the expansion and contraction of the roll which would otherwise be affected by the heat sink effect of the paper on the contacted portion of the roll causing an hour-glass effect. The air jet units utilize electrical heating elements and are actually arranged along, for example, 11/2 inch zones of the paper to provide for a differential profile control with relatively cold air on the uncovered ends of the calender roll to compensate for contraction of the center portion of the roll.

Abstract: A method for calendering a paper web, including the steps of passing the paper web through a calendering nip having a profile formed from a pair of calendering rolls, wherein at least one of the pair of calendering rolls includes a soft exterior face at least in the region of the nip, regulating the profile of the calendering nip to compensate for flaws in the paper web passing through the calendering nip including varying the properties of the soft exterior face locally in a direction transverse to the direction of the passing paper web concurrently with the passing step.

Abstract: A method and apparatus for controlling a deflection roll for compressing a web of material includes a shaft and a hollow roll disposed around the shaft. The hollow roll includes a working surface where the hollow roll is engageable with a hard roll along an entire length of the working surface. At least two bearing devices are disposed within the roll and are substantially aligned with the working surface of said roll. Each bearing device has a predetermined positive bearing clearance facilitating displacement of each outer contact surface relative to a respective inner contact surface of each bearing. The deflection roll further includes a mechanism for displacing the working surface of the roll with a fluid where the displacing mechanism is disposed external to the bearing devices.

Abstract: A paper machine roll, in particular for a soft calender or supercalender, which includes a metal frame, roll ends, and shafts. The frame is coated with a polymer coating over at least a middle area or central region thereof while lateral regions may optionally remain uncoated. In order to equalize a difference in temperature between the roll ends and the optionally non-coated lateral regions of the metal frame, on one hand, and the coated central region area of the roll, on the other hand, an arrangement for equalizing the difference in temperature is provided by heating the roll ends and the optionally non-coated lateral regions of the metal frame.

Abstract: A calender has at least four rollers that are located one above the other. The rollers rotate about roller bearings. The calender is located within a paper-making machine. Each of the rollers is rotatably driven by an independent driving mechanism. At least two of the rollers are heatable. At least 40% of the rollers are soft rollers. The outer coverings of the soft rollers are made of a synthetic material that is not sensitive to marking so that a doctor blade can be applied to the soft rollers. The calender includes a device that inserts a paper guide strip into the calender.

Abstract: A roller has a rotary hollow cylinder through which extends a non-rotary crosshead. The hollow cylinder is supported on the crosshead by two opposite rows of hydrostatic supporting elements. When the roller is operated at particularly low linear pressures in the roll gap, a uniform linear force over the whole width of the paper web is exerted in the row of supporting elements opposite to the roll gap, causing an increase in the hydraulic pressures required in the row of supporting elements that faces the roll gap, until said pressures reach a range in which perfect operation of the supporting elements is ensured.

Abstract: A cross directional caliper control system for a calender. A coarse caliper control mechanism adjusts the pressure over a first range of values. A fine caliper control mechanism adjusts the pressure over a second range of values, where the second range of values is smaller than the first range of values. Sensors sense the dimension of the paper web passing through the calender. A control mechanism coupled to the coarse calender control mechanism, the fine calender mechanism and the sensors controls the caliper across the width of the paper by varying the nip pressure with both the coarse caliper control mechanism and the fine caliper control mechanism to shift the variability of the caliper so that it corresponds to nip pressure adjustments within the second range of values. Bumpless adjustments of the coarse control mechanism are made by making counteracting adjustments to the fine control mechanism.

Abstract: A throttle valve is provided in each actuator of a calender roll controller with the throttle valve controlling an internal air orifice within each actuator to provide a substantially uniform air mass flow of either hot or cold air. Each throttle valve is controlled in response to the temperature of the air being delivered by the actuator such that a smaller orifice is provided for hot air than for cold air to provide substantially uniform air mass flow from each of the actuators and therefore substantially uniform air velocity to better control the temperatures of the longitudinal zones of a calender roll and better maintain boundaries between the zones. In addition to throttle valve control of the actuators, an air scoop concentric with a calender roll being controlled and spaced from the calender roll is provided to channel air from the actuators over the calender roll. The scoop comprises heat insulating material to prevent heat loss out the back of the scoop.