Friction Buckler With Uniform Rib And Spring Backing
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Solution Overview
Problem
Conventional friction buckler assemblies in media feed mechanisms face challenges in tuning spring forces due to inconsistencies in pellethane molding, leading to issues with single-sheet feeding and noise, as well as difficulties with heavier media due to varying spring forces and buckler height dependencies.
Innovation Solution
A friction buckler design with a body of uniform rigidity and a centrally extending rib, backed by a spring force material, eliminates the need for legs and reduces molding tolerances, allowing for independent adjustment of buckler height and spring force, thereby simplifying tuning and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pellethane buckler with legs is used, then spring force is applied to buckle media, but varying spring forces occur due to molding inconsistencies and multi-sheet feeding issues arise
Solution Approach 1:
The patent removes the legs from the buckler assembly, extracting the source of molding inconsistency. By eliminating the legs, the design relies solely on the friction buckler body and its integration with the housing, thereby eliminating the variable spring forces that caused multi-sheet feeding issues and improving single-sheet feeding reliability.
Solution Approach 2:
The patent merges the buckler body directly with the housing structure. The friction buckler is integrated into the housing such that the housing itself provides the spring force mechanism, eliminating the need for separate legs and reducing the number of components that could introduce manufacturing variations.
2Adaptability or versatility
If higher spring force is applied to buckle heavier media, then feeding of heavy media improves, but multi-sheet feeding increases due to excessive force
Solution Approach 1:
The patent creates a dynamic spring force mechanism where the housing and buckler body work together to provide adjustable force. The design allows the spring force to be tuned independently of the buckler height, enabling adaptation to different media weights while maintaining single-sheet feeding reliability through controlled force application.
Solution Approach 2:
The patent enables independent adjustment of spring force and buckler height as separate parameters. By decoupling these parameters, the system can be optimized for different media weights by adjusting the spring force independently, preventing both insufficient force for heavy media and excessive force that would cause multi-sheet feeding.
3Force
If legs are included in buckler assembly, then spring force is generated, but manufacturing complexity and cost increase
Solution Approach 1:
The patent removes the legs from the buckler assembly, extracting unnecessary components that added complexity. The spring force is generated solely through the friction buckler body and housing integration, reducing the number of parts and simplifying manufacturing while maintaining the required force for media buckling.
Solution Approach 2:
The patent combines the spring force generation function directly into the housing and buckler body integration. This merging eliminates the need for separate legs and reduces assembly steps, lowering manufacturing complexity and cost while still providing the necessary spring force for media feeding.
4Manufacturing precision
If tight molding tolerances are used for pellethane, then buckler height precision is achieved, but manufacturing cost and difficulty increase
Solution Approach 1:
The patent removes the legs that required precise molding tolerances. By eliminating these components, the design reduces the cumulative tolerance requirements and simplifies the molding process, making it easier to manufacture while still achieving sufficient buckler height precision through the integrated housing and buckler body.
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 design enhances the ability to control buckler force and height independently, reducing multi-sheet feeding issues and noise, while accommodating a range of media weights, and lowers manufacturing costs by simplifying the buckler structure.
Implementation Method 1
backed by a spring force material, eliminates the need for legs and reduces molding tolerances, allowing for independent adjustment of buckler height and spring force
Implementation Method 2
The ridged top surface of the friction buckler ridged rib must come in contact with the leading media edge and cause a buckling motion on the front of the media stack
Data Source
AI summary
A tuned media buckler comprises a body made of a plastic material, a rib extending from the upper surface of the body with an overall flat configuration and uniform rigidity with the rib running along the upper surface and centrally lengthwise along the body, a spring force material backing the lower surface of the body opposite to the rib that compresses against the lower surface of the body in response to the generally normal force applied to the top edge surface of the rib by a media stack, and a housing having a central aperture running lengthwise of the housing such that the rib of the media buckler extends through the aperture for engagement by a media stack.