Screen Printing for Thick Ink Application

Reducing Moire effects and improving image quality in rotary screen printing of textiles by using a printing screen with a parallelogram pattern of screen openings and an imaged lacquer layer with pixel-based open areas arranged in an orthogonal raster. The parallelogram screen pattern and orthogonal lacquer pattern reduce interference between the screen openings and imaged areas, avoiding Moire defects. The screen has crossing points thicker than bridges to prevent distortion.

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Printing screen with oblique warp and weft threads for precise graphics printing without mesh blockage. The screen has a mesh with thinned warp and weft threads at the knots. This allows rotating the threads to create an oblique screen angle. Openings in the screen are formed by removing just warp or weft threads in certain areas. This prevents blocking while printing thin lines. The oblique threads reduce ink resistance and line fluctuation compared to perpendicular screens. The thinned threads enable rotating to match graphic shapes and avoid blockage.

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Reducing Moiré defects in rotary screen printing of textiles by optimizing the alignment of the screen opening pattern and the scanning direction of the image lacquer layer. The method involves using a screen with a parallelogram-shaped pattern of openings oriented in a specific direction. The image lacquer layer is scanned in a direction that matches the orientation of the screen openings. This improves image quality by reducing interference and Moiré effects compared to traditional orthogonal screen patterns.

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A double-layer screen printing method to create complex dot shapes without needing multiple screens. The method involves using a stretched 50-mesh diamond screen as the bottom layer, followed by a second stretched screen with a different shape as the top layer. When printing, the bottom layer forms the base shape and the top layer adds the secondary shape on top. This allows creating custom dot shapes by combining the two stretched screens.

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A method and screen for screen printing valuable documents like banknotes to reduce downtime and waste by covering the screen with a film that has larger openings than the stencil. This prevents ink from seeping through damaged areas of the stencil, which can cause misprints. The film is placed over the entire screen surface and has openings at the locations matching the motif areas where the stencil is cut away. This ensures ink only passes through those areas for printing. The film protects the rest of the screen from ink leakage if the stencil gets damaged, preventing contamination and misprints.

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Automated custom screen printing process for garments with variable designs like player numbers and names. The process involves selecting a design from a computer database, applying parameters like scaling, and transmitting it to a plotter/cutter to create the stencil with a perimeter. The stencil is then aligned and secured to the screen. The screen and stencil are applied to the garment for printing, allowing customization without needing pre-made stencils for each variation.

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High-quality and high-precision screen printing ink for thermoplastic resin substrates that can produce printed products with compatibility for molding processes. The ink allows screen printing fine dots, lines, and large monochromatic areas in one step. The ink has solvent with a boiling point of 170°C or higher, a thermoplastic polymer with Tg 20-95°C, and viscosity 5-180 Pa·s. This provides flexibility and durability for molding while preventing film cracking and leaking. The ink also contains dispersed pigments with particle size 35 µm or less. The ink composition enables high-resolution screen printing with low defects, like pinholes, for thermoplastic substrates like automotive interiors, displays, electronics, and molded products.

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A screen printing technique using a new type of screen that allows printing with larger amounts of ink and high resolution. The screen has a 3D structure with peaks and valleys on the printing side. The peaks are formed by thicker bridge portions between the mesh openings compared to the valleys at the intersections. This 3D structure improves ink transfer and sharpness compared to traditional flat screens. The 3D screen can be made by electroforming metal mesh.

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Integrally formed screen structure for printing with high toughness and strength. The screen has a mesh fabric made from a metal plate instead of interlaced threads. The mesh has pattern grooves on the printing side and ink penetration holes on the scraping side. The grooves match the patterns being printed. The holes have inconsistent shapes and sizes. This allows customized ink penetration to match the pattern shapes. The groove depth is less than the mesh height and pattern height. This prevents ink leakage. The holes are larger than the grooves. This allows ink to pass through while preventing clogging. The pattern grooves and ink holes are formed directly in the metal mesh, eliminating the need for interlaced threads. This provides a more durable, high-strength screen plate for printing.

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Screen printing system and method to prevent distortion and improve quality of printed images, especially on thick or multiple layered articles like jackets. The system uses a circular base with a resilient annular member to securely hold the article without wrinkles. The article is then printed by passing ink through a parallel screen above it. This prevents distortion by avoiding wrinkles on the printed area. The annular member ensures the article is evenly held flat against the base.

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