Image Reading Apparatus Speed and Sheet Distance Control
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Solution Overview
Problem
Conventional image reading apparatuses experience reduced productivity during double-sided reading due to the need to adjust scanning speeds and document conveying speeds, leading to unnecessary time intervals between sheets, which results in wasted time and decreased productivity.
Innovation Solution
The apparatus adjusts the conveying speed and image reading speed differently for single-sided and double-sided modes, with a shorter distance between sheets during double-sided reading to maintain productivity without increasing size or cost, using a control unit to manage the image reading units and conveying unit accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the scanning speed of the frontside image reading unit is reduced to conform to the performance of the backside image reading unit during double-sided reading, then the backside reading performance is improved, but the reading productivity is reduced
Solution Approach 1:
The patent applies dynamics by making the conveying speed adjustable based on reading mode. The conveying unit can operate at a first conveying speed during single-sided reading and a second conveying speed during double-sided reading, allowing the system to adapt to different operational requirements and resolve the contradiction between backside reading performance and reading productivity
Solution Approach 2:
The patent changes the conveying speed parameter based on the reading mode. By setting different conveying speeds for single-sided and double-sided reading modes, the system optimizes the balance between reading performance and productivity, preventing the conveying speed from being unnecessarily limited by the slower backside reading capability
2Ease of operation
If the distance between original document sheets is controlled to be constant in both single-sided and double-sided reading modes, then the document handling is simplified, but the time interval between sheets increases during double-sided reading, resulting in wasted time
Solution Approach 1:
The patent applies dynamics by making the distance between original document sheets adjustable based on reading mode. The control unit sets a first distance between sheets during single-sided reading and a second distance during double-sided reading, allowing the system to optimize the interval to match the actual reading time requirements and eliminate wasted time
Solution Approach 2:
The patent changes the distance between original document sheets parameter based on the reading mode. By setting different distances for single-sided and double-sided reading modes, the system synchronizes the sheet interval with the reading operation duration, preventing time waste while maintaining simple document handling
Data Source
AI summary
An image reading apparatus that improves reading productivity during simultaneous double-sided reading without leading to increases in the size and cost of the apparatus and a method for controlling the image reading apparatus are provided. To accomplish this, the image reading apparatus, in the case of a single-sided reading mode, controls the scanning speed of a first image reading unit to a first scanning speed and controls the distance between original document sheets to a first distance between original document sheets. On the other hand, in the case of a double-sided reading mode, the image reading apparatus controls the scanning speed of the first image reading unit to a second scanning speed that is the scanning speed of a second image reading unit and that is slower than the first scanning speed, and controls the distance to a second distance that is shorter than the first distance.