Self-inking stamp absorber manages ink leakage
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Solution Overview
Problem
Self-inking stamps with porous marking blocks face issues with ink leakage due to varying ink permeation times and difficulties in accurately replenishing ink, leading to excessive ink application and leakage when internal pressure increases, such as with temperature changes.
Innovation Solution
A self-inking stamp design featuring a porous marking block with an ink storage body and an absorber generating a capillary force less than the ink storage body, along with an ink supply tube and a wall member to manage ink distribution and prevent leakage, including an air passage for excess ink absorption and a replaceable ink cartridge for efficient ink replenishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If ink is supplied to the porous marking block via natural permeation, then the marking surface can be replenished without manual intervention, but the user cannot accurately control the amount of ink replenished, leading to excessive ink application
Solution Approach 1:
An absorber is introduced as an intermediary component between the ink storage body and the porous marking block. This absorber selectively absorbs excess ink from the ink storage body, preventing over-saturation of the marking block while maintaining automatic supply functionality. The absorber acts as a regulatory mediator that controls the net ink flow to the marking surface.
Solution Approach 2:
The system incorporates a feedback mechanism where the absorber responds to the ink level and saturation state of the porous marking block. When the marking block becomes saturated, the absorber prevents further ink transfer, effectively creating a self-regulating feedback loop that maintains optimal ink levels without user intervention.
2Device complexity
If the ink storage body is directly connected to the porous marking block, then ink supply is simple, but ink leakage occurs when internal pressure increases due to temperature changes
Solution Approach 1:
The absorber serves as a buffer intermediary between the ink storage body and the porous marking block. It absorbs and retains excess ink, preventing pressure spikes from causing leakage. The absorber acts as a shock-absorbing layer that decouples the ink supply system from pressure-induced leakage issues.
Solution Approach 2:
The absorber is pre-positioned in the ink supply path to cushion against pressure increases before they can cause leakage. By continuously absorbing excess ink, the system is prepared in advance to handle pressure variations from temperature changes, preventing leakage before it occurs.
3Manufacturing precision
If manual ink replenishment is performed by dropping liquid ink, then the user can control the replenishment process, but it is time-consuming and imprecise due to varying ink permeation times
Solution Approach 1:
The system performs self-service by automatically regulating its own ink supply through the absorber mechanism. The absorber continuously monitors and adjusts ink flow to the porous marking block based on its saturation state, eliminating the need for manual replenishment operations and saving user time while maintaining precision.
4Extent of automation
If an ink cartridge is used to supply ink, then ink can be stored and supplied automatically, but the system becomes complex and prone to ink leakage when internal pressure increases
Solution Approach 1:
The absorber is introduced as a simple intermediary component that adds minimal complexity while providing crucial pressure buffering. It sits between the ink cartridge and porous marking block, absorbing excess ink and preventing leakage without requiring complex pressure control mechanisms or additional active components.
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
The design ensures stable ink supply without leakage, even with temperature-induced pressure changes, by directing excess ink to the absorber or wall member, and allows for easy ink replenishment without disrupting the ink supply system.
Implementation Method 1
an absorber disposed on an upper surface of the ink storage body and configured to generate a capillary force less than that of the ink storage body, and absorb excess ink from the ink storage body
Implementation Method 2
ink stored in the ink storage body naturally flows down (permeates) into a porous marking block to permeatingly supply ink to a marking surface of the marking block
Data Source
AI summary
Self-inking stamp comprises: a porous marking block; an ink storage body disposed on an upper surface of the porous marking block; an absorber disposed on an upper surface of the ink storage body and configured to generate a capillary force less than that of the ink storage body, and absorb excess ink from the ink storage body; an ink tank comprising an ink supply tube having an open distal end connected to the ink storage body; a wall member covering an outer lateral peripheral surface of the ink storage body in such a manner as to prevent ink leakage; an ink outlet opening provided in a part or an entirety of a lower surface of the ink storage body; and an air passage opening provided in at least a part of an outer lateral peripheral surface of the absorber in communicating relation with atmospheric air.