Duplex Image Alignment via Segmented Adjustment Patterns
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Solution Overview
Problem
Conventional image forming apparatuses struggle to precisely detect slight misalignments between adjustment pattern images on the front and back sides of a recording sheet, as unbroken straight lines make it difficult for operators or detection devices to accurately assess alignment.
Innovation Solution
The introduction of a set of adjustment pattern images formed as broken linear patterns on both sides of the recording sheet, with alternating and spaced patterns that allow for precise alignment adjustments, enabling operators or detection devices to accurately detect misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If unbroken straight lines are used as adjustment pattern images, then the pattern is simple to form, but it becomes difficult to precisely detect slight misalignments between front and back sides
Solution Approach 1:
The adjustment pattern images are divided into multiple segments arranged in alternating order (first adjustment pattern image, second adjustment pattern image, first adjustment pattern image, etc.). This segmentation allows operators to precisely detect misalignments by observing the relative positions of adjacent segments, resolving the contradiction between simplicity and detection precision.
2Adaptability or versatility
If adjustment pattern images are formed on both sides of recording sheet, then duplex printing alignment can be adjusted, but it increases complexity of the adjustment process
Solution Approach 1:
The adjustment patterns from both the front side and back side are merged into a single alternating sequence when viewed through the recording sheet. This merging simplifies the adjustment process by providing a unified reference framework, allowing operators to adjust duplex printing alignment without managing separate complex adjustment procedures for each side.
Solution Approach 2:
The recording sheet itself acts as an intermediary medium that allows the adjustment patterns from both sides to be viewed simultaneously through light transmission. This intermediary function enables the operator to compare and align front and back patterns without requiring separate viewing or adjustment mechanisms, reducing overall system complexity.
Data Source
AI summary
A set of adjustment pattern images includes first adjustment pattern images and second adjustment pattern images to be formed on a first side and a second side of a recording sheet, respectively, by an image forming apparatus. The set of adjustment pattern images is employed to adjust an image forming position by the image forming apparatus such that an image forming position of the first adjustment pattern images is aligned with an image forming position of the second adjustment pattern images. The set of adjustment pattern images includes at least two first adjustment pattern images that are spaced from each other and at least two second adjustment pattern images that are spaced from each other, and the first adjustment pattern images on the first side and the second adjustment pattern images on the second side are arranged alternately with each other.