Offset Printing Plate Deposition Control via Digital Material Placement
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Solution Overview
Problem
Offset printing systems face significant costs and inefficiencies due to the need for frequent replacement of engraved offset plates and changes in printed images, which limits operational flexibility and increases production costs.
Innovation Solution
A device for controlling the deposition of materials onto an offset printing plate, featuring a mesh of hydrophilic and lipophilic surfaces with controlled deposition heads for precise placement of wetting and colored materials, allowing for image creation without etching the plate, and an incremental movement system for efficient image transfer and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If engraved offset plates are used for offset printing, then printing quality and operational flexibility are maintained, but the cost and time for replacing plates and changing images increase significantly
Solution Approach 1:
The patent replaces the need for physical engraved plates with a digital copying system. A digital file containing the image to be printed is used to control deposition heads that deposit material directly onto the substrate through a blanket roller, eliminating the need for physical plate creation and replacement while maintaining printing quality and flexibility
Solution Approach 2:
The patent substitutes the mechanical engraving system with a digital deposition system. Instead of mechanically engraving images onto plates, the system uses computer-controlled deposition heads that receive digital files and directly deposit material in the desired pattern, replacing mechanical plate-making processes with digital control
2Manufacturing precision
If engraved offset plates are used, then printing quality is maintained, but manufacturing costs increase due to frequent plate replacement
Solution Approach 1:
The system uses digital copying to maintain printing quality without the costs of physical plate manufacturing. The digital file is copied and interpreted by the deposition system to reproduce images with high precision directly on the substrate, eliminating plate manufacturing costs while maintaining quality
Solution Approach 2:
The system changes the fundamental parameter of image storage from physical (engraved plates) to digital (digital files). This parameter change enables high-resolution printing quality through digital control while dramatically reducing manufacturing costs by eliminating the need for physical plate production and replacement
3Productivity
If material deposition is controlled by digital files with computer control, then image changing speed increases, but system complexity increases
Solution Approach 1:
The deposition heads are designed with multi-functionality, capable of depositing different materials (inks, varnishes, coatings) through the same digital control system. This universal system handles multiple printing functions through a single integrated platform, managing complexity through consolidation rather than proliferation of separate systems
Solution Approach 2:
The patent introduces a computer system as an intermediary between the digital file and the physical deposition process. The computer interprets the digital file and controls the deposition heads, acting as a mediator that translates digital information into precise material deposition, enabling fast image changes while managing system complexity through software control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the cost and time required for changing images and maintaining machinery, while maintaining the quality and flexibility of offset printing by enabling precise and efficient material deposition and transfer, thereby minimizing wear and replacement needs.
Implementation Method 1
The engraved plate then includes the image to be printed by the offset process. The aqueous solution during the wetting step is deposited to adhere to the aluminum parts of the plate surface
Implementation Method 2
the coating of the offset plate comprises a mesh defined by a plurality of hydrophilic and lipophilic unit surfaces capable of receiving a controlled deposition of material(s)
Implementation Method 3
each of these hydrophilic and lipophilic unit surfaces being separated from its direct neighbors by at least one hydrophobic and lipophobic peripheral surface
Implementation Method 4
The principle of offset printing is based on the principle of water-grease repulsion by creating an emulsion between an aqueous dampening solution and a greasy ink successively deposited on an engraved copper and aluminum plate
Data Source
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AI summary
The present invention relates to a substance(s) deposition control device for an offset printing system comprising at least one offset plate (2) intended to receive at least one substance so as to transfer the substance or substances onto a substrate (4), at least one means for the controlled deposition of at least one substance, the deposition means comprising at least one head unit spraying at least one wetting solution and at least one head unit spraying at least one coloured substance, at least one means (6) for cleaning the offset plate (2). The covering of the offset plate (2) comprises a mesh structure defined by a plurality of hydrophilic and lipophilic individual surfaces capable of receiving a controlled deposition of substance(s), each of these hydrophilic and lipophilic individual surfaces being separated from its direct neighbours by at least one hydrophobic and lipophobic peripheral surface. The invention also relates to a printing system incorporating the device and to a printing process implementing the device.