Ink Pack Welded Tap Reinforcement
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Solution Overview
Problem
Conventional ink packs for inkjet recording devices are prone to breakage and damage due to the formation of poly pools at the welding junctions between the flexible sheet member and the tap, which are weak and susceptible to deformation under stress, especially in low temperature environments.
Innovation Solution
The ink pack design includes a film bag with a sealed chamber and a tap welded to one edge, featuring a film welding part with a wider welding width adjacent to the tap welding part, forming a cylindrical ink flow channel to protect poly pools and enhance mechanical strength, and optionally incorporating a laminated structure with a water and air barrier layer to prevent ink deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible sheet member is welded to the tap using conventional welding methods, then the ink pack can be sealed and formed, but poly pools form at the welding junction which are weak and prone to breakage under stress
Solution Approach 1:
The patent applies local quality by creating a reinforced welding structure with different welding widths at different locations. The film welding part has a wider welding width than the tap welding part, creating a stepped configuration that distributes stress and protects the weak poly pool areas while maintaining sealing integrity at critical locations.
Solution Approach 2:
The patent incorporates a preliminary action by forming the reinforced welding structure during the welding process itself, before the ink pack is filled or subjected to use conditions. The stepped welding configuration is created in advance to prevent poly pool formation and protect against stress-induced breakage from the outset.
2Strength
If the welding width is increased to protect poly pools, then mechanical strength is improved, but the complexity of the welding process increases
Solution Approach 1:
The patent applies local quality by creating a reinforced welding structure with different welding widths at different locations. The film welding part has a wider welding width than the tap welding part, creating a stepped configuration that distributes stress and protects the weak poly pool areas while maintaining sealing integrity at critical locations.
Solution Approach 2:
The patent segments the welding process into two distinct parts: the film welding part with wider welding width for structural strength, and the tap welding part with narrower welding width for precision sealing. This segmentation allows each welding zone to be optimized for its specific function while being implemented through a single integrated welding operation.
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 configuration effectively prevents the ink pack from being ripped or damaged at poly pool locations, increasing the mechanical strength and ensuring smooth ink flow while maintaining the integrity of the ink within the sealed chamber.
Implementation Method 1
welding (by a heat seal) peripheral parts of the folded sheet 102
Implementation Method 2
welding (by a heat seal) peripheral parts of the folded sheet 102
Implementation Method 3
a resin dissolves from the flexible sheet member 102 and the tap 101 when they are welded to each other
Implementation Method 4
the dissolved resin solidifies at the outside of an appropriate welding range
Data Source
AI summary
There is provided an ink pack, which is provided with a film bag that has a sealed chamber therein and is formed of a flexible film member having a form of a bag, and a tap that has an ink flow channel therein and is welded to one edge of the flexible film member. In this structure, a film welding part, in which opposed inner surfaces of the flexible film member are welded to each other, is formed at least along the one edge of the flexible film member. A tap welding part, in which a side of the tap is welded to opposed inner surfaces of the flexible film member, is formed in the one edge of the flexible film member. Further, a welding width of a side of the film welding part adjacent to the tap welding part is larger than a welding width of a side of the tap welding part adjacent to the film welding part.