Wiping Assembly Guide Elements for Nozzle Alignment
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Solution Overview
Problem
Traditional printing systems face challenges in achieving precise alignment between wiping assemblies and fluid ejection assemblies during maintenance, often resulting in inconsistent and ineffective wiping of nozzles due to independent steering and alignment elements that fail to establish contact before wiping.
Innovation Solution
A guide system with guide elements and non-wiping components that establish a docking arrangement, allowing the wiping assembly and fluid ejection assembly to make releasable contact for precise registration and alignment, ensuring a parallel wiping relation and closer tolerance loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional independent steering and alignment elements are used for wiping assembly and fluid ejection assembly, then each assembly can operate independently, but precise alignment between wiping assembly and fluid ejection assembly cannot be achieved
Solution Approach 1:
The patent combines the steering and alignment functions into a single integrated guide system. The guide elements on the fluid ejection assembly work with corresponding guide components on the wiping assembly to provide both steering and alignment in one unified mechanism, eliminating the need for separate independent steering and alignment elements while achieving precise alignment between the wiping assembly and fluid ejection assembly.
Solution Approach 2:
The guide elements and guide components act as intermediary elements that mediate between the wiping assembly and fluid ejection assembly. These intermediary guide structures establish contact before wiping to ensure precise alignment, serving as a bridging mechanism that enables accurate positioning without requiring complex independent steering systems on both assemblies.
2Reliability
If traditional alignment methods without prior contact are used, then the structure is simpler, but consistent and effective wiping of nozzles cannot be achieved
Solution Approach 1:
The guide elements and guide components are designed to make contact and establish alignment before the wiping action begins. This preliminary contact and alignment phase ensures that the wiping assembly is precisely positioned relative to the fluid ejection assembly prior to wiping, guaranteeing consistent and effective nozzle cleaning while maintaining a relatively simple overall structure.
3Manufacturing precision
If independent alignment elements are used for each assembly, then manufacturing is easier, but tolerance loops are larger and alignment is less precise
Solution Approach 1:
By merging the alignment function into the guide elements that are integral to the fluid ejection assembly structure, the patent reduces the number of separate manufactured components. The guide elements are manufactured as part of the fluid ejection assembly housing, and the wiping assembly includes corresponding guide components, creating a coordinated pair that achieves tight tolerance loops without requiring complex independent alignment elements on both assemblies.
Data Source
AI summary
A wiping assembly includes a pair of guide elements located at opposite ends of a headland region of a fluid ejection assembly to extend in a second orientation generally perpendicular to a first orientation through which the opposite ends extend. Each guide element includes at least one first portion and a second portion. The at least one first portion selectively receives biased releasable engagement from a non-wiping portion of a wiping element extending along the first orientation to cause a wiping portion of the wiping element to be in generally parallel relation to, and spaced apart from, the headland region. The second portion causes the non-wiping portion to no longer be in biased releasable engagement against the guide element and causes the wiping portion to be biased in wiping relation against the headland region.