Sheet Feed Air Blowing Control for Paper Type Separation
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Solution Overview
Problem
Conventional image forming apparatuses perform air blowing separation before detecting paper type, wasting time and reducing sheet printing efficiency for paper types with low double-feeding risk.
Innovation Solution
An image forming apparatus that selectively blows air onto sheets using a blower based on the detected paper type, allowing for efficient air blowing separation only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air blowing separation is always performed before detecting paper type, then double-feeding is prevented for coated paper, but sheet printing efficiency is reduced due to wasted time for paper types without high double-feeding risk
Solution Approach 1:
The air blowing separation is performed in advance before sheet feeding for coated paper types that have high double-feeding risk, ensuring reliable separation before the printing process begins. This preliminary action prevents double-feeding issues from occurring in the first place.
Solution Approach 2:
The system dynamically adjusts the air blowing separation operation based on the detected paper type. For coated paper with high double-feeding risk, air blowing is performed before feeding. For other paper types without high double-feeding risk, air blowing is skipped. This dynamic adaptation optimizes both reliability and productivity.
2Reliability
If air blowing separation is performed for all paper types, then double-feeding is prevented, but processing time increases unnecessarily for paper types with low double-feeding risk
Solution Approach 1:
The air blowing separation is applied selectively based on local characteristics of different paper types. Coated paper, which has specific surface properties leading to high double-feeding risk, receives air blowing treatment. Other paper types with different characteristics do not require this treatment. This localized approach ensures reliability where needed while avoiding unnecessary time loss.
Solution Approach 2:
The system performs paper type detection first, then applies air blowing separation only when needed based on the detection result. This preliminary detection action allows the system to avoid unnecessary air blowing operations for paper types with low double-feeding risk, reducing wasted time while maintaining reliability for coated paper.
3Reliability
If air blowing is performed before paper type detection, then coated paper double-feeding is prevented, but energy is wasted on unnecessary air blowing operations
Solution Approach 1:
The air blowing energy is applied locally and selectively only to coated paper types that have high double-feeding risk. The system detects paper type first, then applies air blowing only when the detected type requires it. This localized energy application prevents waste while ensuring reliability for problematic paper types.
Solution Approach 2:
The system uses feedback from the paper type detection sensor to control the air blowing operation. The detection result feeds back to the control unit, which then decides whether to activate the air blowing mechanism. This feedback loop ensures energy is only consumed when necessary, preventing waste while maintaining double-feeding prevention for coated paper.
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
Enhances sheet printing efficiency by reducing unnecessary air blowing operations, thereby optimizing resource utilization and improving processing time.
Implementation Method 1
a blower configured to blow air onto the one or more sheets stacked on the sheet feed tray
Implementation Method 2
a sensor provided along the sheet conveyance path and configured to detect a sheet type of the one or more sheets
Data Source
AI summary
Provided are an image forming apparatus and methods for controlling the apparatus, which includes a central processing unit (CPU) configured to set whether to operate an air blowing fan before a paper type detection sensor detects a type of sheet. In a case where a setting to blow the air is made by the CPU, the air blowing fan blows the air when a sheet feed unit feeds the sheet before the paper type detection sensor detects the type of the sheet. In a case where a setting not to blow the air is made by the CPU, the air blowing fan does not blow the air when the sheet feed unit feeds the sheet before the paper type detection sensor detects the sheet type.