Angled Alignment Unit for Sheet Singulation Gas Flow
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Solution Overview
Problem
Existing sheet separation devices often require significant effort and can lead to unintended transport of multiple sheets, causing disruptions in processing machines, as they struggle to prevent sticking and simultaneous lifting of adjacent sheets.
Innovation Solution
A separating device with an angled alignment unit featuring multiple openings for a controlled gas flow, which creates an air cushion between sheets, preventing sticking and ensuring efficient separation by aligning the stack and directing the gas flow to separate sheets with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gas stream is used to separate sheets from a stack, then separation effort is reduced, but multiple sheets may be simultaneously lifted and transported causing disruptions
Solution Approach 1:
The gas stream is directed locally to specific regions of the stack through angled alignment units and multiple openings, creating localized air cushions between individual sheets rather than uniformly across the entire stack. This localized approach enables precise control over which sheets are separated, preventing simultaneous lifting of multiple sheets while maintaining ease of operation.
Solution Approach 2:
The separation process is segmented into multiple controlled zones using angled alignment units with multiple openings. Each opening creates a separate air cushion zone between adjacent sheets, allowing individualized control of sheet separation. This segmentation prevents the gas stream from lifting multiple sheets simultaneously while maintaining low separation effort.
2Productivity
If sheets are moved vertically apart to separate them, then separation is achieved, but negative pressure creates sticking between sheets
Solution Approach 1:
An air cushion is introduced beforehand between adjacent sheets through the angled alignment units before the sheets are moved vertically apart. This pre-established air cushion prevents negative pressure from forming between the sheets during separation, eliminating the sticking force that would otherwise occur when sheets are pulled apart. The cushioning gas acts as a barrier that maintains sheet separation throughout the separation process.
3Reliability
If the stack is aligned to prevent undesired sheet movement, then separation reliability is improved, but device complexity increases
Solution Approach 1:
The angled alignment units are designed to automatically align the stack through the natural interaction between the gas stream and sheet edges. The alignment function is integrated into the existing separation mechanism, utilizing the same gas flow that performs separation. This self-aligning approach improves separation reliability without requiring additional complex alignment devices or mechanisms.
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
The device effectively prevents the simultaneous transport of multiple sheets, ensuring reliable separation and minimizing disruptions in processing machines by creating a uniform air cushion and aligning the stack for efficient gas flow.
Implementation Method 1
an air cushion or air gap is introduced at least in regions, i.e. between some of the sheets, by means of which it is prevented that when the stack is separated
Implementation Method 2
a negative pressure created between them when the sheets are moved vertically apart can lead to the sheets sticking to one another
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 2c
AI summary
The invention relates to a singulation device (10) for singulating a stack (12) of paper or cardboard sheets (14), comprising at least one separating device (24) by means of which the stack (12) can be supplied with a gas stream (36), in particular an air stream, for singulating the paper or cardboard sheets (14), wherein the separating device (24) for aligning the stack (12) has at least one angled alignment unit (26) and a first opening (32) designed as a through-opening through the angled alignment unit (26), by means of which the stack (12) can be supplied with the gas stream (36) for singulating the paper or cardboard sheets (14). The invention further relates to a separating device (24) for a singulation device (10) and to a method for operating a singulation device (10).