Air Blowing Unit Timing for Double Feeding Prevention
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Solution Overview
Problem
Existing image forming apparatuses consume unnecessary power due to air separation being performed on subsequent sheets before they are ready to be fed, especially when the detected paper type of the first sheet has a high possibility of double feeding.
Innovation Solution
The image forming apparatus includes a paper type detection unit on the paper conveying path, which detects the paper type of the first sheet. If the first sheet requires air blowing, air blowing is performed on the second sheet only after the first sheet has been printed by the image forming unit, and air blowing is not performed during the period from paper type detection to when the first sheet is fed to the image forming unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air blowing is performed on the second sheet before the first sheet is fed to the image forming unit, then double feeding is prevented, but power consumption increases due to unnecessary air blowing
Solution Approach 1:
The system performs air blowing on the second sheet in advance (before the first sheet is fed) when the detected paper type indicates high double-feeding risk. This preliminary action prevents potential double feeding issues while allowing the system to later cancel unnecessary air blowing operations, thereby resolving the contradiction between reliability and energy consumption.
Solution Approach 2:
The air blowing operation is made dynamic and adjustable based on real-time detection results. The control unit determines whether to continue or cancel air blowing for the second sheet based on the paper type detection outcome, enabling the system to adapt its behavior to actual conditions rather than following a fixed operation pattern.
2Reliability
If air blowing is always performed on subsequent sheets, then double feeding is prevented, but unnecessary power consumption occurs when air blowing is not needed
Solution Approach 1:
The system uses paper type detection feedback to control air blowing operations. When the detected paper type does not require air blowing (low double-feeding risk), the control unit cancels the air blowing operation for subsequent sheets, thereby eliminating energy waste while maintaining reliability when needed.
Solution Approach 2:
The air blowing operation parameters are changed based on detected paper type characteristics. The system adjusts whether to perform air blowing by changing the operational state from active to inactive based on the detected paper type, thereby optimizing energy consumption while maintaining double-feeding prevention capability.
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 approach effectively suppresses power consumption due to unnecessary air blowing by ensuring that air separation is only performed when the second sheet is ready to be fed, thereby optimizing energy usage.
Implementation Method 1
an air blowing unit configured to perform air blowing on the sheet stacked on the paper feeding tray
Data Source
AI summary
An image forming apparatus includes an air blowing unit that does not perform, in a case where a type of a first sheet detected by the paper type detection unit is a type that requires the air blowing, air blowing on a second sheet to be fed subsequent to a first sheet at least during a period from when a paper type detection unit detects a type of the first sheet to when the first sheet is fed to an image forming unit, and performs the air blowing on the second sheet after the image forming unit performs printing on the first sheet.