The invention relates to an apparatus for inspecting printed images for a printing or finishing machine with continuously moving printed products with an image detection device (3) with at least one camera (7), which is set up to detect a multi-line section of a recording region (5). In accordance with the invention, the device is characterized by an evaluation device (8) which is set up to process at least two partial areas of the multi-line section as one strip image each, and has a validation mode in which at least two strip images of a test image are compared with each other to check whether deviations of the strip images are detected. In a method according to the invention for validating the inspection algorithms, a stencil (20; 40) is placed in a recording region (5) of the device (1) for print image inspection, at least two multi-line strip images are acquired and compared with each other to determine whether deviations between a first and a second pattern are detected.

The invention relates to a method for illuminating a wood fibre web for deviation detection. The method comprises turning on LEDs of an overhead sidelight that are side-directed towards a first edge of the web for illuminating a first half of width of the web, capturing an image of the first half, turning off the LEDs, turning on LEDs of the overhead sidelight that are side-directed towards a second edge of the web for illuminating a second half of width of the web, capturing an image of the second half, and turning off the LEDs. The invention also relates to an overhead sidelight, a machine vision system, and a lighting system.

A corrugated board sheet defect detecting device detects a defect in a single-faced cardboard sheet guided by a guide member with corrugated core paper facing outwards. The device includes a radiating device, an image capturing device, an image processing device, and an assessing device. The radiating device is configured to radiate light toward the core paper at a radiation angle relative to the single-faced cardboard sheet. The image capturing device is configured to capture an image of a portion of the core paper irradiated with the light. The image processing device is configured to a light portion and a dark portion in a direction in which the single-faced cardboard sheet is transported based on the captured image. The assessing device is configured to assess a quality by comparing a length of the light portion and a length of the dark portion.

The invention relates to a method, comprising illuminating an area of a wood fibre web by directing ultraviolet light to an area of the web by an ultraviolet light source, capturing an image of at least part of the illuminated area by an imaging device comprising a colour filter, transmitting image data of the captured image to an image data processing device, and analysing if the captured image comprises a fluorescent liquid stain emitting fluorescent light passed through the colour filter. The invention further relates to a machine vision system and a computer program product for detecting fluorescent liquid stains from a wood fibre web.

Card-handling devices may include an input area sized and shaped to receive cards and an output area for outputting at least some of the cards. A defect detection system may be located along a card path downstream from the input area. The defect detection system may be configured to scan at least one card to determine whether at least one characteristic of the at least one card has been modified beyond a predetermined limit or whether the at least one characteristic of the at least one card is within the predetermined limit. A diverter may be configured to divert the at least one card from the card path when the at least one characteristic of the at least one card has been modified beyond the predetermined limit and enable the at least one card to continue on the card path when the at least one characteristic of the at least one card is within the predetermined limit.

The present invention has disclosed a multifunctional automatic quality inspection machine and a control method thereof. The machine comprises a frame, an unrolling device provided at the frame, an inspection mechanism, a button operating platform, a slitting mechanism, a main controller, a display device, and a rolling device; a paper movement route is provided between the unrolling device and the rolling device; the inspection mechanism and the display device are respectively electrically connected to the main controller; the rolling device includes a first rolling airshaft, a second rolling airshaft, and a rolling drive device; the first rolling airshaft and the second rolling airshaft are provided on the rolling drive device; the first rolling airshaft and the second rolling airshaft swap their positions via the rolling drive device. The machine has a number of functions including automatic unrolling, high inspection precision, discharging waste materials, splitting and quick rolling.

A full width measurement system includes a frame having a first and second rails. The first and second rails are positioned transverse to a moving sheet of material such that the first and second rails are positioned on opposite sides of the moving sheet. Sources may be positioned along the first rail in a predetermined arrangement across a width of the moving sheet. Each of the sources are configured to emit energy toward the moving sheet in a predetermined pattern. Detectors may be positioned along the second rail in a predetermined alignment with respect to the sources such that each of the detectors detect an energy level from multiple respective sources after the energy from the respective sources has passed through the moving sheet. Controller circuitry is configured to receive signals from the detectors and provide real time measured parameters spanning the width of the moving sheet of material.

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.

The disclosed embodiments illustrate a thermal printer apparatus that includes a media sensor. The sensor generates an input signal indicative of a measure of a media transmissivity/reflectivity. Further, the thermal printer includes a processor that is configured to receive the input signal from the sensor, while the media is stationary with respect to a print head. The processor further determines one or more characteristics of the input signal. Thereafter, a first transmissivity/reflectivity threshold is determined based on the one or more characteristics in the input signal. Further, the processor receives the input signal from the sensor, while the media traverses with respect to the print head. Subsequently, the processor determines one or more current characteristics of the input signal while the media traverses with respect to the print head. A media jam condition is detected based on the one or more current characteristics and the first transmissivity/reflectivity threshold.

The invention relates to a pinhole camera comprising a cleaning chamber for maintaining the quality of images taken by the pinhole camera, the pinhole camera comprising a lens having a rectangular cross-section, a cover glass in front of the lens, for preventing the access of washing liquid, air and impurities into the camera. Furthermore, the camera comprises a cleaning chamber formed between the cover glass and the wall comprising the pinhole of the pinhole camera by means of a flange, the flange being provided with an opening from which compressed air and washing liquid can be supplied by a tube into the cleaning chamber, for cleaning the cleaning chamber. The compressed air and the washing liquid are configured to exit the cleaning chamber via the pinhole of the pinhole camera. Furthermore, the invention relates to a web monitoring beam and a system for cleaning the pinhole camera.