Two-Ply Sheet Separation Using Adaptive Nipping Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet separation devices struggle with separating two-ply sheets when they are strongly adhered due to static electricity, leading to insufficient gap formation for peeling and potential failure in subsequent sheet separation.
Innovation Solution
A sheet processing device with a rotator, first and second nippers, a detector, memory, and circuitry that adjusts the nipping force to create a winding circumferential difference between the sheets, ensuring a gap is formed for separation, and increases the nipping force when an abnormal condition is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the two-ply sheet is wound around the rotary member to generate a difference in winding circumferential length, then the device configuration remains simple, but a sufficient gap cannot be formed when sheets are strongly adhered by static electricity
Solution Approach 1:
The patent applies dynamics by making the nipping force adjustable rather than constant. The nipping force of the rotary member is dynamically changed between a first value (during normal operation) and a second value (greater than the first, used when separation fails). This dynamic adjustment allows the system to adapt to different adhesion conditions, enabling reliable separation even when sheets are strongly adhered by static electricity, while maintaining a simple device configuration.
2Ease of operation
If another sheet is subsequently peeled off with constant nipping force, then the device operation is simple, but the sheet cannot be separated again due to small difference in winding circumferential length
Solution Approach 1:
The patent implements dynamics by enabling dynamic adjustment of the nipping force based on separation success. When a sheet cannot be separated (detected by the detector), the nipping force is increased to a second value for subsequent separation attempts. This dynamic control ensures that subsequent sheets can be separated reliably even when the difference in winding circumferential length is small, while keeping the operation simple through automated detection and adjustment.
Solution Approach 2:
The patent applies feedback by using a detector to monitor whether sheets are successfully separated. Based on this feedback, the system automatically adjusts the nipping force - maintaining a first value when separation succeeds and increasing to a second value when separation fails. This feedback mechanism ensures reliable subsequent sheet separation without complicating the operation, as the adjustment is automated based on real-time separation status.
3Reliability
If the nipping force is increased to separate strongly adhered sheets, then sheet separation reliability improves, but the device configuration becomes more complex
Solution Approach 1:
The patent resolves this contradiction by implementing dynamics - the nipping force is made adjustable between two values rather than being fixed. A detector monitors separation success and triggers an increase in nipping force only when needed. This dynamic approach achieves reliable sheet separation under high adhesion conditions while maintaining a simple device configuration, as the complexity of force adjustment is managed through automated detection and control rather than mechanical complexity.
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
Effectively separates two-ply sheets by creating a winding circumferential difference and adjusting nipping force, allowing for reliable insertion of an inner sheet between the separated sheets, maintaining a simpler device configuration.
Implementation Method 1
winds a two-ply sheet, in which two sheets are overlapped and bonded at one end of the two-ply sheet, around the rotator to generate a winding circumferential difference between the two sheets of the two-ply sheet
Implementation Method 2
The first nipper nips the two-ply sheet with the rotator to convey the two-ply sheet in a conveyance direction
Implementation Method 3
when the two sheets are strongly adhered to each other by static electricity
Data Source
AI summary
A sheet processing device includes a rotator, a first nipper, a conveyor, a second nipper, a detector, a memory, and circuitry. The rotator winds a two-ply sheet around the rotator to generate a winding circumferential difference between two sheets of the two-ply sheet to separate the two sheets. The detector detects an abnormal condition, in which a gap greater than a given interval is not formed between the two sheets around the rotator. The memory stores a detection result as the abnormal condition. The circuitry is to increase a nipping force of the second nipper with the rotator, and increase the nipping force in a present sheet processing to be greater than a previous nipping force of the second nipper in a previous sheet processing, when the memory stores the detection of the abnormal condition in the previous sheet processing, to wind the two sheets around the rotator.