Abstract: A multi-pass UV inkjet printer for outputting high glossy varnish and a printing method using the same includes providing a side UV light irradiation device at a side of an inkjet module and a front UV light irradiation device in front of the inkjet module not overlapped by a varnish print head. During output of the varnish, varnish outputted on a substrate in the nth pass is passed under the side UV light irradiation device with a lower UV irradiation power during or after the n+1th pass performed by the UV inkjet printer for setting or temporarily no curing, and then during or after the next pass, the varnish is passed under the front UV light irradiation device with a higher UV irradiation power for complete curing, thereby increasing production yield.

Abstract: A digital inkjet printing method capable of imparting a transparent color to a UV-curable transparent ink includes: on multiple color ink inkjet heads and a transparent ink inkjet head, setting a first output area and a second output area, respectively; controlling at least one color ink inkjet head to output from the first output area a color ink corresponding to the first output area in a first printing stroke, and at the same time of the output, so as to form a pattern area; and at a partial position, where a transparent effect is to be formed, on the pattern area, simultaneously controlling at least one color ink inkjet head and the transparent ink inkjet head to simultaneously output from the second output area a color ink and a transparent ink corresponding to the second output area in a second printing stroke.

Abstract: A laser cutting machine capable of producing focal points with the same size comprises a working platform, a pen housing, and a beam expander. The pen housing is movably provided on the working platform for receiving laser beams from a laser tube to cut an article provided on the working platform. The beam expander is provided in a laser beam output path between the laser tube and the pen housing, so that the laser beams are output after passing sequentially through the beam expander and the pen housing, wherein the beam expander is provided movably on the working platform, and the displacement of the beam expander is changed with the displacement of the pen housing, so as to produce focal points with the same size after the laser beams are output.

Abstract: A detecting method for printing material boundary of a large UV inkjet printer includes steps of performing a full-field scanning process at a first scanning speed by a photosensitive element disposed on an inkjet module to cause a sensing device to produce induced voltage signals corresponding to different positions below sequentially in order to determine rough coordinate positions of two opposite sides of the printing material based on the changes of the induced voltage signals, and to define detailed scanning areas including the rough coordinate positions of the two opposite sides; and performing a detailed scanning process for the detailed scanning areas along an opposite direction at a second scanning speed slower than the first scanning speed by the photosensitive element in order to obtain boundary coordinate positions of the two opposite sides of the printing material based on the changes of the induced voltage signals.

Abstract: A method for an ultraviolet (UV) inkjet printer to generate an irregular transparent matte particle surface and a completed printing object thereof are provided. After a pattern is printed on a substrate, an inkjet module is enabled to perform first transparent ink spraying on an entire pattern region with UV lights on, so as to form a first transparent color layer on the pattern, and then perform second transparent ink spraying on an entire region of the first transparent color layer with the UV lights off. After the spraying, the inkjet module is enabled to move back and forth above all printing regions of the substrate with the UV lights on, so as to form a second transparent color layer having irregular transparent matte particles on the first transparent color layer.

Abstract: A switchable compound laser working machine comprises a machine body, a first output module, a second output module, a switch module, and a control module. The first and second output modules are respectively provided with a laser tube. The switch module has at least one lens. It is able to change the output direction of laser beams by moving the lens. The control module is used for controlling the laser tubes of the first and second output modules to perform output operation respectively and used for moving the lens of the switch module into output pathway of the laser beams from the first or the second output module to alter the output direction of the laser beams.

Abstract: A method for printing on a shiny surface by a UV inkjet printer with transparency and high color density is described. Steps of the method include: (a) according to a conveying direction of a workpiece, dividing the workpiece with a reflective film into a plurality of continuous printing areas; (b) performing a printing operation on each printing area of the reflective film of the workpiece for at least three times; and (c) turning on a UV lamp at one side of an inkjet module when a final printing operation is performed on each printing area, to cure ink jetted from the inkjet module, thereby enabling the reflective film of the workpiece to still retain high shininess and high transparency after printing of the workpiece with a transparent reflective film surface is completed, and enabling a pattern printed thereon to have high color density.

Abstract: Laser engravers with a masking mechanism comprise a machine body, a laser-engraving mechanism inside the machine body, a working platform, and an exhauster. The laser-engraving mechanism includes a lens-cart rail that moves back and forth along a working track. The exhauster includes air outlets behind the working platform. The masking mechanism, which includes a reelable curtain-sheet, is installed above the air outlets so that while processing, the curtain-sheet is reeled out above the working platform and an air induction channel is formed to increase the working efficiency of the exhauster.

Abstract: In an engraving method for a laser engraver, an engraving apparatus of the laser engraver performs an engraving for data of a transversal engraving line and then engraves for data of a transversal engraving line in a jumping mode to improve a banding phenomenon and enhance the engraving quality, further the engraving data points of each transversal engraving line can also be engraved in the jumping mode, so as to enhance the overall quality of the engraved object and effectively lower the visual effect of an uneven brightness of traditional laser engravers.

Abstract: A spacing-sensing apparatus for use in a printing module of printer is disclosed. The spacing-sensing apparatus includes an oscillating device pivotally disposed on the frame of printing module, wherein the oscillating device has a swing body designed to be rotatably disposed on the lateral plate of the frame, and one end of the swing body is capable of making contact with the surface of a print media when the printing module descends to a predetermined distance from the printing module to the print media, allowing rotation of the other end thereof to trigger switch means for stopping the descending of printing module.

Abstract: A method for adjusting the relative position of devices of a laser engraver. The method includes an outputting device of the laser engraver to forms a marked point on a non-working piece. Let the outputting device position the center of the marked point and record it. Then an image sensing device of the laser engraver is moved to the marked point and seeks the center of the marked point. Then, the position point that the outputting device is located is recorded after the outputting device moved according to the movement of the image sensing device. Finally, calculating the distance between the center recorded by the outputting device and the position point recorded after the outputting device moved to obtain the precise distance between the image sensing device and the outputting device.

Abstract: A printhead cleaning device for a large printer provided at a lateral side of a printing rail of the printer, it comprises a base and a swinging platform, wherein the base has four peripheral sides forming a receiving space, the swinging platform is movably and pivotally connected to the base; the swinging platform has thereon a plurality of elongate holes, so that the residual ink on the printhead set can be collected in the receiving space of the base through the elongate holes, every two elongate holes have therebetween a scraper in the shape of a taper sectionally and made of soft material, so that when the base is pushed upwards by a pushing device to its predetermined position, the scrapers on the swinging platform can have scraping actions against the moving printhead of the printhead set.

Abstract: A laser cutting machine includes a cover which is pivotably connected to a side of the base of the machine. Two supports are connected between the cover and the base so as to maintain the open status of the cover. Two hand access recesses are defined in the rear end of the cover which can be pivoted upward by only one person such that maintenance can be proceeded easily and large objects conveniently access the work top surface.