Abstract: This invention can provide a stretched multilayer thermoplastic resin film comprising a layer including a thermoplastic resin (B) on at least one surface of a layer including a thermoplastic resin (A), the stretched multilayer thermoplastic resin film being characterized in that: the intrinsic birefringence of each of the thermoplastic resin (A) and the thermoplastic resin (B) is within a range from ?0.005 to 0.005; the glass transition temperature of the thermoplastic resin (B) is 110° C. or higher; and the saturated water absorption rate of the thermoplastic resin (B) is less than 1.1 wt %.

Abstract: Formable films are provided that include one or more biaxially-oriented polyethylene terephthalate layers. The formable films include a metaphase with a metaphase transition of about 180° C. to 200° C. as measured by differential scanning calorimetry (DSC). The formable films further include a molded volume of greater than 200%. Laminate structures including the formable films and processes for producing and using the formable films and laminate structures are also provided.

Abstract: The present invention provides an aqueous polyurethane dispersion (PUD) comprising an amorphous polyester having a glass transition temperature (Tg) as determined by differential scanning calorimetry of less than ?30° C.; wherein the aqueous polyurethane dispersion (PUD) has a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) of 0° C. to 20° C. and a hard block content of greater than 50%. Coatings, adhesives, sealants, paints, primers and topcoats, made from the inventive aqueous polyurethane dispersion are particularly suited for use on glass, e.g., borosilicate-based glass, silicon-based glass, silicon-based glass, fused silica/quartz-based glass, soda-lime glass, and aluminosilicate-based glass and fiberglass (glass-reinforced plastic), e.g., continuous glass fiber rovings, woven glass fiber rovings, glass fiber mats, chopped glass fiber strands, and glass fiber yarns.

Abstract: The present invention provides an aqueous polyurethane dispersion (PUD) comprising an amorphous polyester having a glass transition temperature (Tg) as determined by differential scanning calorimetry of less than ?30° C.; wherein the aqueous polyurethane dispersion (PUD) has a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) of 0° C. to 20° C. and a hard block content of greater than 50% and wherein the aqueous polyurethane dispersion (PUD) provides resistance to one or more selected from the group consisting of 10% HCl, water, motor oil, diesel fuel, 10% acetic acid, methyl ethyl ketone and 25% NaOH.

Abstract: The present invention provides an optically clear adhesive sheet with excellent environment resistance using a thermosetting polyurethane composition that has excellent flexibility and is capable of giving a thick film. The optically clear adhesive sheet of the present invention contains: a cured product of a thermosetting polyurethane composition, the thermosetting polyurethane composition containing an olefin-based polyol component and a polyisocyanate component, the optically clear adhesive sheet exhibiting a moisture absorption of 1.0 wt % or lower after being subjected to a test in a high-temperature, high-humidity environment for eight hours and exhibiting a haze of 1.5% or lower after being subjected to the test in a high-temperature, high-humidity environment for 100 hours, wherein the test in a high-temperature, high-humidity environment is performed at a temperature of 85° C. and a humidity of 85%.

Abstract: Provided is an adhesive dispensing device for use in a Layered Object Manufacturing (LOM) system for forming a three-dimensional (3D) object, the device configured to apply adhesive to a plurality of object media layers each comprising a temporary region and a permanent region. A first adhesive is applied to the temporary regions and a second adhesive is applied to the permanent regions. Further provided are first and second adhesive formulations, a bonding module for bonding a plurality of individual object media layers using the first and second adhesives, and a LOM system comprising the bonding module. Also provided is a method for self-weeding of a LOM object.

Abstract: A method for bonding a three-dimensional cover, which includes the following steps: bonding a flexible display panel on a heavy release film through optical adhesive to obtain a bonded body; placing the bonded body on a carrying surface of a conformable tool, making the flexible display panel face the carrying surface of the conformable tool, and fixing two ends of the heavy release film in the bonded body to fixtures of the conformable tool; controlling the fixtures of the conformable tool to adjust the shape of the bonded body, so that the adjusted shape of the bonded body matches the three-dimensional cover; tearing off the heavy release film from the bonded body to obtain the flexible display panel with optical adhesive, and bonding the three-dimensional cover to the flexible display panel using the optical adhesive.

Abstract: A method of making plastic flooring contains steps of: A. providing the substrate and delivering the substrate toward a rolling unit; B. delivering a printing layer, wherein the printing layer is blank and is delivered toward the rolling unit by way of a second delivery roller mechanism; C. rolling, wherein the rolling unit rolls the substrate and the printing layer, and the printing layer has three-dimensional embossing; D. digital printing, wherein color material being printed on three-dimensional embossing by using the digital print unit; E. coating an abrasion resistant layer, wherein a coating unit coats wear-resistant materials of the abrasion resistant layer on the printing layer; and F. shaping, wherein the plastic flooring material is shaped so as to dry and harden the abrasion resistant layer.

Abstract: In an example implementation, a method of extracting three-dimensional (3D) objects includes forming on a vibratory extraction platform, a build cake comprising a fused 3D object encased within build material and vibrating the extraction platform to break apart the build material and sift it through openings in the extraction platform.

Abstract: Examples disclosed herein relate to selecting a 3D printing parameter based on voxel property association and conflict resolution. In one implementation, a processor assigns properties to a voxel of a 3D print object based on a first and second zone including the voxel and a condition of a first property associated with the first zone and a condition of a second property associated with the second zone. The processor may update the assigned properties to resolve conflicts between the properties and select a 3D printing parameter based on the assigned properties.

Abstract: There is disclosed a printing machine (10), including a plurality of rollers (20) defining a web path for transitioning a web of media through the printing machine. Each of the plurality of rollers (20) is provided with a guide collar (60) for locating a belt (40) on the respective roller. The belt follows the web path and releasably connects to the web of media such that when the belt (40) is connected to the web (30) and when the guide collar (60) is rotated around an axis of rotation of the roller, the belt threads the web (30) along the web path.

Abstract: The present invention discloses a digital ink duct for a printing press, comprising an ink tank for storing ink, a main ink pipe that communicates with the ink tank, at least one metering-type ink delivery device, ink delivery pipes, a controller and a signal acquisition device. In the present invention, high-accuracy, metering-type ink delivery devices are arranged in a queue to form a digital ink duct which replaces the traditional ink duct and supplies ink for the ink zones. The present invention can perform accurate adjustment in real time, is high in automation and digitalization degree, and can realize one-way ink delivery and avoid ink return.

Abstract: A method for producing a light-accumulating transfer sheet, which comprises: an adhesive layer forming step for forming an adhesive layer on a supporting layer; a resin layer forming step for forming a resin layer on the adhesive layer; a heat generation layer forming step for forming a heat generation layer, which comprises a dye layer containing a near-infrared absorbing dye on the resin layer; and a pigment dispersion layer forming step for forming a pigment dispersion layer, which contains a light-accumulating pigment on the heat generation layer.

Abstract: To cure, with light irradiation, photocurable resin or electron beam-curable resin not containing a photopolymerization initiator. Under an atmosphere equal to or lower than predetermined oxygen concentration for not causing oxygen inhibition to polymerization of photocurable resin or electron beam-curable resin, an ultraviolet ray in wavelength region corresponding to a light absorption characteristic of the photocurable resin or the electron beam-curable resin is irradiated on the photocurable resin or the electron beam-curable resin to polymerize the photocurable resin or the electron beam-curable resin. After an ultraviolet ray is irradiated on the photocurable resin or the electron beam-curable resin to polymerize at least a surface layer, an electron beam is irradiated on the photocurable resin or the electron beam-curable resin to polymerize a deep part, and the entire photocurable resin or the entire electron beam-curable resin is cured.

Abstract: The present invention relates to an ink-jet printing apparatus that is capable of obtaining printed materials that are free of occurrence of color migration and have good appearance even when printed on a resin printing medium using a water-based ink, and an ink-jet printing method. The present invention provides an ink-jet printing apparatus including an ink-jet printing head that ejects a water-based ink onto a resin printing medium that is transported in a feeding direction thereof, and an under heater that heats the printing medium from a rear side surface of the printing medium opposed to a front side surface thereof which faces to the ink-jet printing head, in which the under heater is disposed at a position spaced at a distance of from 0.05 to 3.0 mm apart from the rear side surface of the printing medium upon printing, and an ink-jet printing method using the ink-jet printing apparatus.

Abstract: A nozzle member includes a base, a metal oxide film, and a water-repellent film. The base includes a first surface having a plurality of through-holes as ejection orifices. The metal oxide film is located on the first surface. The water-repellent film is located on the metal oxide film. The metal oxide film has a greater thickness in a first area than in a second area. The first area is an area surrounding each ejection orifice. The second area is an area between adjacent first areas.

Abstract: There is provided a transfer method for transferring a member formed on a film held on a frame jig to an object including: attaching the member formed on the film to the object in a first direction; and delaminating the film from the object in a second direction intersecting with the first direction, wherein a rigidity of the frame jig in the first direction is higher than that of the frame jig in the second direction.

Abstract: A liquid ejection head includes an ejection opening member having an ejection opening through which a liquid is ejected. The ejection opening member is provided with a cured layer of a composition over the surface thereof. The composition contains (a) a condensate of a hydrolyzable silane compound having a fluorine-containing group and a hydrolyzable silane compound having a cationically polymerizable group, and (b) a compound having a cationically polymerizable group and an ethylene oxide chain.

Abstract: A printer includes ink heads, an ink head conveyor, a movable table, cap valves, lifters, a guide device, and a controller. The conveyor moves the ink heads in a main scanning direction. The movable table includes caps and is movable in the main scanning direction by the conveyor. The guide device defines a path along which the movable table is movable between a cap attaching position, a valve opening position, and a retracted position. Movement of the movable table to the valve opening position causes the lifters to abut against the cap valves to bring the cap valves to an open state and expose opening/closing passages to the atmosphere. Movement of the movable table to the cap attaching position from the valve opening position causes the lifters to move away from the cap valves to bring the cap valves to a closed state.

Abstract: A printer includes ink heads, an ink head conveyor, caps, a conveyor, suction pumps, opening passages, suction passages, and cap valves. The suction pumps are each provided for an associated one of the caps. The suction passages each connect an associated one of the caps to an associated one of the suction pumps. The conveyor 50 includes a base, a movable table, a guide wall, and a spring. The movable table supports the caps and includes a table wall extending upward from an end of the movable table facing in a first direction extending to a cap attaching position in a main scanning direction. The cap valves are disposed on a surface of the table wall facing in the first direction.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head which performs a printing by ejecting liquid onto a medium from a nozzle, a wiping portion which wipes the liquid ejecting head by moving relative to the liquid ejecting head, a maintenance unit which performs a maintenance to forcibly discharge the liquid from the nozzle, and a preprocessing device which performs a preprocessing on the medium before the printing is performed, in which when the wiping portion and the liquid ejecting head are separated from each other in the wiping not accompanying the maintenance, the wiping portion is displaced in a direction away from the preprocessing device.

Abstract: An object is to suppress reduction of the stability of electrical connection between a liquid ejection apparatus and a liquid supply unit. A liquid supply unit (20) configured to be mountable to a liquid ejection apparatus (50) that has a first electrode (930a) and a second electrode (930b) comprises a first contact portion (cpb) configured to be in contact with the first electrode (930a) in a state that the liquid supply unit (20) is mounted to the liquid ejection apparatus (50); a second contact portion (cpb) configured to be in contact with the second electrode (930b) in the state that the liquid supply unit is mounted to the liquid ejection apparatus (50); and a wall portion (40) configured such that the first contact portion (cpb) and the second contact portion (cpb) are placed therein.

Abstract: Provided is a highly-convenient ink replenishment container. The ink replenishment container includes: a container main body portion capable of containing the ink; and an ink outlet forming portion that is to be attached to an end portion of the container main body portion and at which an ink outlet through which the ink flows out is formed. In a region located outside of the ink outlet, the ink replenishment container includes an erroneous insertion prevention portion that protrudes relative to the ink outlet in a direction opposite to the container main body portion in an axial direction as an axial center, and is configured to be inserted into a recessed portion and to prevent erroneous insertion into the ink tank. The erroneous insertion prevention portion includes protrusions that can be attached and detached, the protrusions are attached and detached in accordance with the shape of the recessed portion.

Abstract: In some examples, a valve assembly for a fluid ejection device includes a plurality of valves to control fluid supply from a plurality of fluid sources to the fluid ejection device, each respective valve of the plurality of valves actuatable between a first valve position to provide fluid communication through a first fluid path between a first fluid source of the plurality of fluid sources and the fluid ejection device, and a second valve position to provide fluid communication through a second fluid path between a second fluid source of the plurality of fluid sources and the fluid ejection device. A common actuator, when energized, controls movement of the plurality of valves. Each respective biasing mechanism of a plurality of biasing mechanisms is to maintain the respective valve at each of the first valve position and the second valve position without energizing the common actuator.

Abstract: There is provided an ink jet recording apparatus capable of preventing a user from erroneously performing an opening and closing operation of a valve in the supply of ink to a recording head from an ink tank.

Abstract: The present invention relates to an ink-jet printing method that is capable of obtaining good printed materials that are free of occurrence of color migration and deformation of a printing medium even when printed on a transparent resin printing medium using a water-based ink containing a white ink, and a black or chromatic ink.

Abstract: A scanning path of light includes a synchronization detection area A where a synchronization detection sensor 47 detects scanning light and an image writing area B where writing of the image data to a photosensitive drum 11 is performed by the scanning light, and a light amount change unit 100 is configured to reduce a change amount of a light amount in the synchronization detection area A as compared with the image writing area B.

Abstract: A method and a device as provided for printing a large surface which is situated, in particular, on a substrate which cannot be fed to a printing device. The method is distinguished by the fact that the perpendicular spacing Azo of a reference point of the device at a plurality of points which are distributed over the printing web from the surface to be printed is determined in each case at the points which are distributed over the printing web, and the perpendicular spacing Az of the print head from the surface to be printed is set in accordance with a previously recorded measured value. Here, the plurality of points can be distributed uniformly over the length of the printing web. The device for carrying out the method has a measuring device for contactless measurement of the spacing between a reference point of the device and the surface to be printed.

Abstract: A printer includes: a print head that performs printing on a print medium of a conveyance object having the print medium and a member other than a print medium having mutually different colors or color brightness levels on regions on one side; a detector to detect a color or color brightness of the conveyance object at a detection position; and a processor. When there is a change in the color or color brightness as a first detection result as compared with the color or color brightness as a second detection, the processor updates a held value, and does not update the held value when there is no change. The processor determines whether there is a change in a detection value as compared with the updated held value or a previous held value not updated. When determining that there is no change, the processor stops printing.

Abstract: A printer capable of separating a print medium from a mount and ejecting the print medium includes: a platen roller configured to feed, along a feeding path, a mount to which a print medium temporarily adheres; a print head configured to print on the print medium, the print head being opposed to the platen roller; a driven roller that is movable between a first position and a second position different from the first position; a separation member configured to separate a feeding path of the mount and a feeding path of the print medium; and a looseness prevention mechanism configured to prevent the mount from being loose while the driven roller moves from the second feed position to the first feed position. The first position is a position where the driven roller is opposed to the platen roller. The driven roller is configured to be driven by the platen roller while coming in contact with the mount.

Abstract: A wider variety of printing is performed more appropriately using ink that generates heat by energy radiation. A printing method of performing a printing on a medium using a color ink includes a water-soluble ink layer forming step of forming a water-soluble ink layer that is a layer of ink that becomes water-soluble after fixing, a color ink layer forming step of ejecting the color ink to the medium to form a color ink layer that is a layer of the color ink, and a water-soluble ink layer removing step of removing the water-soluble ink layer. The color ink includes a colorant and a solvent and generates heat by radiation of an energy ray. In the color ink layer forming step, the energy ray is emitted to the color ink after ink droplets landing to remove by evaporation at least a part of the solvent included in the color ink.

Abstract: Disclosed is a printing apparatus including a recording head configured to perform printing on a medium that is transported in a transport direction, a guide portion disposed on a downstream side of the recording head in the transport direction and configured to guide the medium, and a first heating unit disposed between the recording head and the guide portion in the transport direction and configured to heat the medium. The guide portion includes a contact member configured to guide the medium by contacting the medium, a coupling portion coupled with the contact member, and a holding unit configured to hold the contact member via the coupling portion. Thermal conductivity of the coupling portion is lower than thermal conductivity of the holding unit.

Abstract: A method of detecting feeding status and width of paper is disclosed in this present invention, steps of the method include: step a, using at least one infrared light transmitter to transmit infrared light signals; step b, using a light-gathering element to gather together the infrared light signals transmitted by the infrared light transmitter; step c, using a light receiver to receive the infrared light signals gathered together by the light-gathering element, when paper is fed forward, the paper will be located between the infrared light transmitter and the light-gathering element, and will cover a part of the light-gathering element so as to cut off a part of the infrared light signals, how many infrared light signals the light receiver received will be changed, a feeding status and a width of the paper is determined according to how many infrared light signals the light receiver received.

Abstract: An image forming apparatus includes a pair of support frames, an opening and closing door and a positioning structure. The pair of support frames are arranged oppositely at both sides of an opening. The opening and closing door is supported by one of the pair of support frames via a turning shaft and turns around the turning shaft between a closing position where the opening and closing door closes the opening and an opening position where the opening and closing door opens the opening. The positioning structure positions the opening and closing door to the pair of support frames by engaging a convex part or a concave part provided in the pair of support frames with a concave part or a convex part provided in the opening and closing door in a state where the opening and closing door is turned to the closing position.

Abstract: A printer includes a thermal head, a connecting part capable of being connected to and disconnected from the thermal head, and a head cover of the thermal head. The head cover moves between a first position and a second position different from the first position to connect and disconnect the thermal head and the connecting part.

Abstract: The present invention relates to a method for forming a bezel pattern using inkjet printing, and according to the present invention, there is an advantage in that it is possible to form a bezel pattern which is smooth without a curing shrinkage when the bezel pattern is formed and has excellent adhesion strength to a base material, and accordingly it is possible to provide a bezel pattern which has excellent performance, durability, and chemical resistance and a display substrate including the same.

Abstract: A transfer material is provided that can be more firmly attached to an image substrate without deteriorating printing characteristics concerning image bleeding, printing resolution, and the like. An ink receiving layer is of a gap-absorbing type. An adhesive layer includes discretely disposed adhesive pieces provided on a surface of the ink receiving layer so as to leave exposed portions on the surface of the ink receiving layer.

Abstract: A magnetic paper product capable of being printed directly and the preparation method thereof are provided. The product has the unique feature, consisting of a friction-holding covering thin layer, on which sequentially set with a magnetic layer and a printable layer. The friction-holding covering thin layer is a nonwoven fabric called cotton paper (mianzhi) in Chinese. It can achieve the effect of printing magnetic paper after being magnetized, eliminating the trouble that the terminal user has to magnetize the paper after printing, improving the grade of inflexibility of the magnetic paper, reflection of the light and the flatness of the printing surface, solving the problem which has been a plague of the magnetic paper industry and the printing industry for long time.

Abstract: A photosensitive resin printing plate precursor includes at least a substrate and a photosensitive resin layer, the photosensitive resin layer containing: (A) a partially saponified polyvinyl acetate, (B) a polyamide having basic nitrogen, (C) a compound having an ethylenic double bond, and (D) a photopolymerization initiator; the photosensitive resin layer including at least an underlayer and a printing surface layer; the substrate, the underlayer, and the printing surface layer being included in this order; and the photosensitive resin layer containing, as the partially saponified polyvinyl acetate (A), those (A1) having an average polymerization degree of 1,200 to 2,600 in the printing surface layer and those (A2) having an average polymerization degree of 400 to 800 in the underlayer.

Abstract: Various themed gift card and gift card holder combinations are disclosed. Some embodiments are contained inside a box along with novelty gift items that are themed or otherwise related to the type of gift card contained therein. Other embodiments contain various three-dimensional pop-up structures and other paper engineered constructs that are shaped, decorated and otherwise themed to match an accompanying gift card. And in yet other embodiments, the gift card holders are directed to specific holidays or special occasions with appropriate gift cards included. Each embodiment may include electronic features, such as audio and light. The packaging of gift card and gift card holder combinations is also disclosed.

Abstract: Various themed gift card and gift card holder combinations are disclosed. Some embodiments are contained inside a box along with novelty gift items that are themed or otherwise related to the type of gift card contained therein. Other embodiments contain various three-dimensional pop-up structures and other paper engineered constructs that are shaped, decorated and otherwise themed to match an accompanying gift card. And in yet other embodiments, the gift card holders are directed to specific holidays or special occasions with appropriate gift cards included. Each embodiment may include electronic features, such as audio and light. The packaging of gift card and gift card holder combinations is also disclosed.

Abstract: A security device is disclosed having public recognition features for use with security substrates to make security documents. The security device has a partial opaque layer having light transmissive regions surrounded by one or more opaque regions. The transmissive regions define negative indicia which are visible when viewed in transmission but not in reflection. Security features are provided on opposing sides of the partial opaque layer forming sides of the security device. At least one of the security features has indicia which are visible when viewed in reflection from one of the sides and at least partially overlap with the negative indicia. The security device has a low optical density layer which is semitransparent in the visual spectral region and is provided within the transmissive regions. The low optical density layer has a substantially continuous layer of a semitransparent material or a screen of opaque screen elements.

Abstract: A laminate includes a diffraction layer that is optically transmissive and includes a diffraction part with a plurality of diffraction units being repetition of a diffraction unit in a direction extending the diffraction layer, each diffraction unit including at least one diffraction element with a reflective diffraction grating; and an absorption layer that is optically transmissive with a plurality of absorption parts for at least part of visible light, the absorption layer facing the diffraction layer with light passing between the diffraction layer and the absorption layer. The laminate has an observation side opposite where the diffraction layer faces the absorption layer; the diffraction layer has a surface serving as a front surface opposite to the surface facing the absorption layer; and in plan view perpendicular to the front surface of the diffraction layer, each of the absorption parts aligns with one of the diffraction elements.

Abstract: A secure item including a revealing screen and a combined image, or an assembly comprising a secure item and another object. The secure item including one of the revealing screen and the combined image, and the object including or forming the other one of the revealing screen and the combined image. The combined image being made up of a plurality of interlaced images each interlaced image and/or the revealing screen being made up of a plurality of elements. The revealing screen making it possible, when placed on top of the combined image, to observe various revealed images by moving the revealing screen relative to the combined image and/or by changing the observation angle, the revealed images each including a certain proportion of each interlaced image, and the elements being made up of one or more micro-patterns.

Abstract: A method of manufacturing a hybrid security structure for a security document, the method comprising the steps of: providing a document substrate; applying to the document substrate, by a first process, a first element comprising a first electrically conductive region of the hybrid security structure; applying to the document substrate, by a second process, a second element comprising a second electrically conductive region of the hybrid security structure, wherein the first process is different from the second process; and electrically coupling the first and second electrically conductive regions of the hybrid security structure for detection by a capacitance sensor.

Abstract: Provided herewith is a marker that has multiple colors and retracts and seals the ink reservoirs. Also provided is a method of selecting a color.

Abstract: A pen for writing and/or drawing purposes, and having a shaft and a core which is arranged within the shaft and is axially adjustable in the longitudinal direction of the shaft between an active position and an inoperative position. The core is completely arranged within the shaft in the inoperative position and projects with an overhang from a front end of the shaft in the active position. An actuating element is provided which is movable perpendicularly to the longitudinal direction of the shaft between an active position and an inoperative position and which is operatively connected to the core via a connecting element in such a way that, during a movement of the actuating element perpendicularly to the longitudinal direction of the shaft between the inoperative position and the active position, the core is axially adjustable in the longitudinal direction of the shaft.

Abstract: A mail creation method includes forming an address, forming an image, folding, inserting, sealing, and fixing a voucher. In the forming of the address, an image forming section forms the address on an envelope. In the forming of the image, the image forming section forms the image on paper. In the folding, a folding section folds the paper having the image formed thereon. In the inserting, an enclosing section inserts the folded paper into the envelope having the address formed thereon. In the sealing, the enclosing section seals the envelope having the folded paper inserted therein. In the fixing of the voucher, a voucher fixing section fixes the voucher to the sealed envelope. The voucher indicates that postage has been paid.

Abstract: A multi-fit wheel includes a central portion, a plurality of spokes extending from the central portion, and a lip extending around an outer periphery of the plurality of spokes. The multi-fit wheel defines a plurality of bolt patterns positioned concentrically with the central portion. Each of the plurality of bolt patterns is radially spaced a different distance from a center point of the multi-fit wheel. Each of the plurality of bolt patterns is rotationally offset relative to the other of the plurality of bolt patterns.

Abstract: The invention relates to a track widening system for motor vehicles, having at least one track widening disc and at least one centering ring which is inserted into a central opening of the track widening disc, wherein the centering ring has at least one first catch device which is arranged at the free end of a resilient arm and wherein the track widening disc has a corresponding second catch device. The centering ring may comprise plastic, and may be fiber-reinforced. One or more centering rings may have different colors. One or more protrusions may extend from a hub centering portion of a centering ring.