Inkjet Printer Upstream Guide with Grit Roller Position Indicators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In large-sized inkjet printers, it is difficult for operators to accurately position the recording medium on the platen due to limited visibility of the grit roller, leading to potential misalignment and hindered movement of the medium.
Innovation Solution
Incorporating an obliquely tilted guide with a concave recess on the upstream side of the platen that indicates the position of the grit roller, allowing operators to easily recognize and align the medium without obstructing its movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the clearance between the platen and carriage is reduced to secure stability and safety, then the carriage stability is improved, but the visibility of the grit roller position from the back side deteriorates
Solution Approach 1:
The guide serves as an intermediary element between the platen and the operator. It provides visual markers (concave recesses and inclined surfaces) that indicate the grit roller position without requiring the operator to see the grit roller directly. This mediator transmits position information from the hidden grit roller to the visible guide surface, resolving the contradiction between reduced clearance for stability and need for visibility for positioning.
Solution Approach 2:
The guide creates a visual copy or representation of the grit roller position through concave recesses and inclined surfaces. Instead of requiring direct observation of the actual grit roller, the operator can see the copied position indicators on the guide surface, which accurately represent where the grit roller is located. This copying mechanism allows position detection without compromising carriage stability.
2Ease of operation
If the recording medium is placed on the platen without proper positioning marks, then the operation is simpler, but the positioning accuracy of the recording medium on the grit roller deteriorates
Solution Approach 1:
The guide uses visual contrast through its structure (concave recesses vs. inclined surfaces) to indicate position. The different geometries create visible distinctions that guide the operator in positioning the recording medium correctly. This visual differentiation system provides clear positional information without complicating the placement operation.
Solution Approach 2:
The guide is segmented into distinct functional zones: concave recesses for indicating grit roller positions and inclined surfaces for guiding medium placement. This segmentation creates clear visual and tactile cues that help operators position different parts of the recording medium accurately without requiring complex positioning procedures.
3Difficulty of detecting and measuring
If the concave recess is filled or protruding from the guide surface, then the grit roller position indication is more visible, but the recording medium movement may be hindered or stuck
Solution Approach 1:
The guide features localized concave recesses that are precisely positioned to indicate grit roller locations. These recesses are designed with specific dimensions and depths that provide clear visual indication while maintaining sufficient clearance for the recording medium to pass over them smoothly. The local quality of the recess geometry is optimized to balance visibility with non-interference to medium movement.
Data Source
AI summary
A printer includes a platen on which a recording medium is placed, an ink head including a nozzle that discharges ink onto the recording medium placed on the platen and that moves in a main scanning direction, an upstream guide located on an upstream side of the platen in a secondary scanning direction and that guides the recording medium, the upstream guide including an upper surface tilted obliquely downward from a downstream side to the upstream side in the secondary scanning direction, and grit rollers provided in the platen and that move the recording medium in the secondary scanning direction. The upstream guide is recessed from the upper surface of the upstream guide, and includes a concave recess that indicates a position of each of the grit rollers in the main scanning direction so that a position of the grit roller is easily acknowledged when the recording medium is placed on the platen.