Printing Plate Elevations with Concave Ink Reservoirs
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Solution Overview
Problem
The existing high-pressure printing process for containers, such as beverage cans, faces challenges in maintaining color intensity and preventing point growth, which leads to a deterioration of the print image.
Innovation Solution
A pressure plate with a majority of surveys that extend from its base area, featuring a combination of flat and concave printing surfaces. The concave surfaces act as reservoirs for the printing ink, allowing for better distribution and increased color intensity without promoting point growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a larger amount of printing ink is applied to the printing plate to maximize color intensity, then color intensity is improved, but dot growth occurs leading to visible deterioration of the printed image
Solution Approach 1:
The printing plate features elevations with different surface characteristics - specifically, at least one elevation has a printing surface comprising a first region with a flat surface and a second region with a concave surface. This local differentiation allows the concave region to hold and distribute ink more effectively, achieving better color intensity while controlling dot growth through the structured surface geometry rather than simply increasing overall ink amount.
Solution Approach 2:
The invention transitions from a two-dimensional flat printing surface to a three-dimensional structured surface with elevations featuring concave regions. This dimensional change creates micro-reservoirs that control ink distribution at the elevation level, enabling precise ink transfer that prevents dot growth while maintaining color intensity through the vertical depth of the concave surfaces.
2Productivity
If printing pressure is increased to improve ink transfer efficiency, then productivity is improved, but point growth occurs deteriorating the print image quality
Solution Approach 1:
The structured elevations with concave surfaces create localized ink reservoirs that control ink release during the printing process. This local ink management allows for efficient ink transfer at the contact point while preventing excessive ink spread, thereby maintaining print image quality even under increased printing pressure conditions.
Solution Approach 2:
The concave surfaces on the elevations pre-position and pre-dose the ink in controlled quantities before the actual printing contact. This preliminary ink positioning ensures that when pressure is applied during printing, the ink is already optimally distributed, preventing dot growth while maintaining transfer efficiency.
Data Source
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AI summary
The invention relates to a printing plate (1) for dispensing a printing ink (2) onto a rubber blanket (3) in order to print an object surface (4). The printing plate (1) has a plurality of elevations (5) which extend from a base surface (6) of the printing plate (1) in a direction (7) which is orthogonal to the base surface (6), wherein each elevation (5) has a printing surface (8) which can be supplied with the printing ink (2) and by means of which the printing plate (1) contacts the rubber blanket (3) in order to transfer the printing ink (2). At least one of the printing surfaces (8) comprises a first region (9) with a flat surface (10) and at least one second region (11) with a concavely formed surface (10), said first region (9) surrounding the entire circumference of the at least one second region (11). The invention also relates to a printing system (19) and to a method for printing an object (20).