Porous Stamp Assembly with Minimal Compression for Furrow Prevention
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Solution Overview
Problem
Existing porous stamp assembly manufacturing methods face issues such as furrowing of the impression die, deviation of the impression die from the predetermined position, and time-consuming ink impregnation due to inadequate compression and adhesion techniques, as well as insufficient ink reservoir design.
Innovation Solution
A method involving hermetic adherence of a porous impression die member to a frame, using a thermal head with a resin film interposed to compress the die member with a compressibility rate of 0-1%, and incorporating a mount with a friction auxiliary element to prevent furrowing and ensure precise positioning, along with direct ink impregnation from the reverse side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the thermal head compresses the porous impression die member to 95 to 30% of its original thickness, then the impression die can be seal-carved into the porous impression die member, but the porous impression die member is deformed by a greater amount which results in the impression die being furrowed
Solution Approach 1:
The patent applies partial compression (0-1% compressibility rate) instead of excessive compression (95-30% thickness reduction). This partial action is sufficient to enable seal-carving while avoiding the deformation and furrowing that results from excessive compression, thus resolving the contradiction between achieving seal-carving precision and maintaining surface smoothness
Solution Approach 2:
The patent changes the compression parameter from high compression (95-30% thickness reduction) to minimal compression (0-1% compressibility rate). This parameter change allows the seal-carving process to proceed effectively while preventing the porous impression die member from deforming and furrowing, thereby simultaneously achieving both seal-carving precision and surface smoothness
2Manufacturing precision
If the thermal head sweeps all over the surface of the impression die member, then the impression die can be created, but the thermal head is likely to fail to regularly receive repulsive force which results in the impression die being furrowed
Solution Approach 1:
The patent uses minimal compression (0-1% compressibility rate) instead of strong compression, which allows the thermal head to sweep across the surface without excessive deformation of the porous impression die member. This partial action maintains the member's dimensional stability, ensuring the thermal head receives regular repulsive force throughout the sweeping process, thus achieving both impression die creation and contact stability
Solution Approach 2:
The patent inherently cushions the thermal head's sweeping action by limiting compression to 0-1%, preventing excessive force that would cause irregular repulsive force. This beforehand cushioning through controlled minimal compression ensures stable thermal head contact throughout the impression die creation process, resolving the contradiction between manufacturing precision and contact reliability
3Device complexity
If the ink reservoir is placed on the reverse side to a stamping face, then the stamp assembly structure is simplified, but the thermal head is likely to fail to regularly receive repulsive force which results in the impression die being furrowed
Solution Approach 1:
The patent applies minimal compression (0-1% compressibility rate) which maintains the dimensional stability of the porous impression die member even with the simplified reverse-side ink reservoir structure. This partial action prevents the member from deforming during thermal head sweeping, ensuring good surface quality while allowing the structurally simplified design to be implemented
4Adaptability or versatility
If the porous impression die member is seal-carved into the impression die, then the stamping function is achieved, but the porous impression die member is likely to furrow which fails to reproduce a desired character or drawing
Solution Approach 1:
The patent uses minimal compression (0-1% compressibility rate) which is sufficient to enable seal-carving and achieve the stamping function, while avoiding excessive compression that would cause furrowing. This partial action preserves the surface quality needed for accurate character and drawing reproduction, thus resolving the contradiction between achieving stamping functionality and maintaining reproduction accuracy
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 method prevents furrowing, maintains precise positioning of the impression die, and significantly reduces ink impregnation time by allowing direct and efficient ink absorption.
Implementation Method 1
the heating elements emit heat selectively as in a given print dot pattern including a character(s) and/or a drawing
Implementation Method 2
ink from the tank member is penetrated into the porous impression die member
Data Source
AI summary
The present invention relates to a porous stamp assembly. The manufacturing method of the assembly comprises a first step of hermetically adhering a porous impression die member of thermoplastic resin to a front end face of a frame; a second step of fixing the die member embedded frame onto a mount that is to be in face-to-face relation with a thermal head attached to a seal carving device; a third step of putting the thermal head in contact with an impression surface of the porous impression die member, with a resin film interposed therebetween, and moving the thermal head and the porous impression die member relative to each other; and a fourth step of removing the die member embedded frame from the mount.