Sheet Holding Device with Blower for Converting Machine Insertion
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Solution Overview
Problem
Existing sheet holding devices in converting machines, particularly in cardboard package manufacturing, face challenges with light and large sheets that deform and cause inaccuracies in ejection due to insufficient suction effectiveness, leading to broken attachment points and reduced production rates.
Innovation Solution
A holding device combining a suction member with a blower to flatten the rear portion of sheets against the suction member during insertion, ensuring effective holding and precision in sheet positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Bernoulli tablet is used to hold the sheet by suction, then the sheet can be held during insertion, but light sheets float away and positioning accuracy deteriorates
Solution Approach 1:
The patent combines a Bernoulli tablet (suction device) with a blower device to create a hybrid holding system. The blower generates a jet of air that presses the sheet against the Bernoulli tablet, ensuring reliable contact and suction adhesion even for light sheets that would otherwise float away, thereby maintaining both holding reliability and positioning precision
Solution Approach 2:
The blower acts as an intermediary device between the sheet and the Bernoulli tablet. It generates a controlled air jet that mediates the interaction by pressing the sheet against the suction surface, enabling the Bernoulli tablet to effectively hold light sheets without compromising positioning accuracy
2Reliability
If the sheet rear portion is held by suction alone, then holding is attempted, but light sheets cause attachment points to break and productivity decreases
Solution Approach 1:
The patent merges suction-based holding with blower-based pressing to create a robust holding system that prevents attachment point breakage. This reliable holding enables consistent ejection operations without forcing operators to reduce production rates, thereby maintaining high productivity
3Device complexity
If sheets are inserted without rear portion holding, then the system is simpler, but sheet flatness deforms and ejection precision worsens
Solution Approach 1:
The patent combines two relatively simple devices (Bernoulli tablet and blower) to achieve precise sheet positioning for ejection. This merged system maintains sheet flatness and positioning accuracy without requiring complex multi-component holding 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 solution effectively holds sheets of any weight and size, improving production accuracy and rate by maintaining sheet flatness and preventing attachment point breakage during ejection.
Implementation Method 1
a suction member able to partially hold each sheet by its rear portion during the phase of insertion of said sheet into the work station
Implementation Method 2
a blower aimed and operable to flatten the rear portion of each sheet against the suction member during the phase of insertion... the airstream generated by the blower presses on one face of the sheet, which makes it possible to flatten the other face against the suction member
Data Source
AI summary
A holding device for holding an element in sheet form 10 during its phase of insertion into a work station 300 of a converting machine 1. The holding device 310 includes a suction member 320 able to partially hold each sheet 10 by its rear portion during insertion of the sheet 10 into the work station 300. The holding device also includes a blower 330 able to flatten the rear portion of each sheet 10 against the suction member 320 during the phase of insertion.