This disclosure describes techniques for automatically controlling the operation of a slitter (40) to convert a web (20) of material into smaller slit rolls (64, 66, 68). A slitter director (60) may automatically control the operation of a slitter (40) for defect removal, web splicing, and/or slit roll rejection based on continually registering previously-generated anomaly data (62) with physical locations of the web (20).

The invention relates to an inspection station for crimped sheet material. The station comprises a light source to illuminate crimped sheet material in an inspection location, a vibrating device to vibrate crimped sheet material in the inspection location. The vibrating device comprises a vibrating element, wherein crimped sheet material is guidable along or over the vibrating element for the crimped sheet material to be vibrated by the vibrating element. The inspection station further comprises a detector for detecting light received from the vibrated crimped sheet material, thereby providing images of the crimped sheet material, and a controller to determine loose material on the crimped surface of the sheet material. The invention also relates to an inspection method and an apparatus comprising an inspection station.

The invention relates to a method for checking the quality of a product (1) comprising at least two cardboard portions (2) connected to each other such that a slot (10) extends between the cardboard portions from one side of the product (1) to the opposite side, with the slot (10) being expected to extend perpendicularly with respect to an outer edge of the product (1), comprising the steps of: capturing a 2D image of the slot (10) at one side of the product (1) and of the slot at the opposite side of the product, analyzing the images so as to recognize the slot (10), comparing the positions of the slot of one product at the opposite sides, making a determination whether or not a difference between the positions is within a predefined range of tolerance. The invention further relates to a machine for checking the quality of a product (1) made from at least two cardboard portions (2) connected to each other such that a slot (10) extends from one side of the product to the opposite side, with the slot being expected to extend perpendicularly with respect to an outer edge of the product, the machine comprising two cameras (304) adapted for capturing a 2D image in a stacking area for stacking the products, an image processing module (306) adapted for recognizing in the captured images the position of the slot on the two sides of the product, and an offset determination module (310) adapted for determining the amount of offset between the position of the slots at the opposite sides of the product.

In a device and a method for detecting a defect in a corrugated cardboard sheet, a device for eliminating a defect in a corrugated cardboard sheet, and a device for manufacturing a corrugated cardboard sheet, the device for detecting a defect in a corrugated cardboard sheet which detects a defect in a wavy core affixed to a liner is provided with: a lighting device that lights the core; an imaging device that captures an image of a lit part in the core; an image processing device that defines a change degree of a light amount value along a conveyance direction of the corrugated cardboard sheet on the basis of the image captured by the imaging device; and a first determination device that compares the change degree of the light amount value with a previously-set first determination value to determine quality.

An object is to provide a monitoring system capable of preventing the occurrence of a defect in paper by monitoring the device. The present invention is directed to a monitoring system A having a papermaking machine 1 for manufacturing paper X, an applying device 2 for applying a chemical solution to a site of the papermaking machine directly or indirectly in contact with the paper while the papermaking machine 1 is operated, a control panel 3 for setting an application condition of the applying device 2, a monitoring camera 4 for monitoring a monitoring target site, and a control device 5 connected to the monitoring camera 4 via a network. The monitoring target site is the site of the papermaking machine 1 directly or indirectly in contact with the paper X and/or the applying device 2, and the control device 5 has a computing unit S1 which converts a state of the monitoring target site into a numerical form by using video taken by the monitoring camera 4, a display unit S2 which displays detection data obtained by conversion into the numerical form at the computing unit S1, and a storage unit S3 which stores the detection data.

In an embodiment an apparatus includes an image acquisition device with at least one camera, the image acquisition device configured to acquire a multi-line section of a recording region and an evaluation device configured to process at least two sub-areas of the multi-line section as one strip image each and compare at least two strip images of a test pattern to each other in a validation mode to check whether deviations of the strip images are detected.

An inspection device of the present invention includes: THz wave irradiation unit for irradiating a specimen with THz waves; a THz wave sensing unit for detecting transmitted waves or reflected waves of the THz waves emitted to the specimen; and an information processing unit for acquiring intensity distribution of the transmitted waves of the reflected waves of the specimen from the intensity data of the transmitted waves or the reflected waves of the specimen irradiated with the THz waves, wherein the information processing unit acquires 2-dimensional intensity distribution of the transmitted waves or reflected waves, and detects whether a foreign matter is adhering to the specimen by comparing the intensity distribution obtained when the specimen without attachment of the foreign matter is detected and the intensity distribution obtained when the specimen is detected at the time of inspection. The specimen is a sheet of paper, for example.

In an example, a surface inspection apparatus includes a light source to illuminate a portion of a surface in a print apparatus, a light detection apparatus and processing circuitry. The light detection apparatus may receive diffusely reflected light and specularly reflected light from the portion of the surface, and may comprise a detection element for detecting the specularly reflected light. The processing circuitry may comprise a comparison module to determine a relationship between an intensity of the detected diffusely reflected light and the detected specularly reflected light and a quality module to evaluate if the surface meets a quality criterion based on the relationship.

A system for wear and aging evaluation of a paper-based resource described herein is structured for determining a fitness state of a physical body structure of a paper resource item and for adaptive processing of the paper resource item in accordance with the fitness state. Specifically, the system comprises an item transfer unit configured to receive one or more paper resource items and a scanning device structured to retrieve a fitness state of a paper resource item from a physical state sensing component of the paper resource item. The system is structured to adaptively process the paper resource item based on determining whether (i) a wear level and (ii) an item age level of the paper resource item are associated with either a fit item type or an unfit item type.

A quality control station (2) for a sheet element processing machine, the station having at least one camera (6) arranged for capturing images of sheet elements (4) transported through the quality control station (2), and further having a camera calibration system (10). The camera calibration system (10) having a target holder (12) for holding an optical target (14), and a drive (15) for the target holder (12). The drive (15) is adapted for displacing the target holder (12) between a rest position, in which it is outside of the viewing area (7) of the camera (6), and a calibration position in which it is arranged in the viewing area (7) of the camera (6).