Abstract: A method of a fingerprint sensing system arranged in a smartcard configured to acquire fingerprint data of a user with a fingerprint sensor for biometric authentication, and a fingerprint sensing system performing the method. The method comprises detecting a finger of the user contacting a sensing area of the fingerprint sensor, initializing the fingerprint sensor with a predetermined sensor setting, acquiring a calibration sub-image which is confined in size to a subarea of the sensing area, determining whether or not a quality criterion is met for the acquired calibration sub-image, and if so acquiring one or more further sub-images confined in size to a subarea of the sensing area during a time period when the smartcard is not engaged in waiting time extension request signalling with a card reader, and combining a plurality of the acquired further sub-images into a representation of a fingerprint of the user.

Abstract: The invention relates to a continuous, scalable and parallelizable method for preparing strong and stiff fibres (filaments) or films. The fibre or film is prepared by utilizing hydrodynamically induced alignment of the constituents of a dispersion in combination with surface-charge controlled gel transition to produce fibres with a high degree of alignment of the constituents (polymer(s), fibrils etc.). The invention also relates to the fibres or films so formed.

Abstract: The invention relates to a continuous, scalable and parallelizable method for preparing strong and stiff fibers (filaments) or films. The fiber or film is prepared by utilizing hydrodynamically induced alignment of the constituents of a dispersion in combination with surface-charge controlled gel transition to produce fibers with a high degree of alignment of the constituents (polymer(s), fibrils etc). The invention also relates to the fibers or films so formed.

Abstract: The invention relates to methods of manufacturing nano pulp, wherein cellulose containing raw material is accelerated in a continuous gas and/or liquid flow, whereby the material is disintegrated and nano pulp is produced. The gas and/or liquid flow may be created by reduction of an elevated pressure in a reactor holding the cellulose containing raw material. The invention also relates to the nano pulp produced.

Abstract: The invention relates to a continuous, scalable and parallelizable method for preparing strong and stiff fibres (filaments) or films. The fibre or film is prepared by utilizing hydrodynamically induced alignment of the constituents of a dispersion in combination with surface-charge controlled gel transition to produce fibres with a high degree of alignment of the constituents (polymer(s), fibrils etc). The invention also relates to the fibres or films so formed.

Abstract: The invention relates to methods of manufacturing nano pulp, wherein cellulose containing raw material is accelerated in a continuous gas and/or liquid flow, whereby the material is disintegrated and nano pulp is produced. The gas and/or liquid flow may be created by reduction of an elevated pressure in a reactor holding the cellulose containing raw material. The invention also relates to the nano pulp produced.

Abstract: Device for measuring the two-dimensional velocity of a moving paper web having opposed first and second surfaces, wherein comprising: at least one light source directed at said first surface and arranged to transmit light through said paper web; at least one image capturing device directed at said second surface, and arranged to receive said transmitted light and produce a two-dimensional image of a section of said paper web; a control unit, arranged to control said at least one light source and at least one image capturing device, and to receive two-dimensional images from said at least one image capturing device, and comprising computation means arranged to compute the velocity component of said paper web in the machine direction and/or the cross direction by calculating the cross correlation of two two-dimensional images.

Abstract: Device for measuring the two-dimensional velocity of a moving paper web having opposed first and second surfaces, wherein comprising: at least one light source directed at said first surface and arranged to transmit light through said paper web; at least one image capturing device directed at said second surface, and arranged to receive said transmitted light and produce a two-dimensional image of a section of said paper web; a control unit, arranged to control said at least one light source and at least one image capturing device, and to receive two-dimensional images from said at least one image capturing device, and comprising computation means arranged to compute the velocity component of said paper web in the machine direction and/or the cross direction by calculating the cross correlation of two two-dimensional images.

Abstract: In a machine for forming a layered fibrous web, at least two different fiber suspensions are led through a head box (10), the fiber suspensions are separated from each other by a blade device (18, 180), the fiber suspensions are supplied to a web forming device (24) and a water layer is formed having a transversely uniform flow at an outlet at the end of the blade device (18, 180), such that the water layer constitutes an extension of the blade device and thereby prevents mixing of the fiber suspensions. The blade device (18, 180) can be freely movable in a substantially vertical direction in order to permit an equalization of pressure between the fiber suspension layers separated by the blade device and thereby reducing wake effects downstream the edge of the blade device.

Abstract: In a method of forming a layered fibrous web, the method includes the steps of leading at least two different fiber suspensions through a head box (10), separating the fiber suspensions from each other by a blade device (18, 180), supplying the fiber suspensions to a web forming device (24) and forming a water layer having a transversely uniform flow at an outlet at the end of the blade device (18, 180), such that the water layer constitutes an extension of the blade device and thereby prevents mixing of the fiber suspensions. The blade device (18, 180) can be freely movable in a substantially vertical direction in order to permit an equalization of pressure between the fiber suspension layers separated by the blade device and thereby reducing wake effects downstream the edge of the blade device. A paper machine for carrying out the method is also disclosed.

Abstract: In a method of forming a layered fibrous web, the method includes the steps of leading at least two different fiber suspensions through a head box (10), separating the fiber suspensions from each other by a blade device (18, 180), supplying the fiber suspensions to a web forming device (24) and forming a water layer having a transversely uniform flow at an outlet at the end of the blade device (18, 180), such that the water layer constitutes an extension of the blade device and thereby prevents mixing of the fiber suspensions. The blade device (18, 180) can be freely movable in a substantially vertical direction in order to permit an equalization of pressure between the fiber suspension layers separated by the blade device and thereby reducing wake effects downstream the edge of the blade device. A paper machine for carrying out the method is also disclosed.