Friction Drum Mail Separator for Reliable Singulation
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Solution Overview
Problem
Existing devices for separating and transporting flat mail items of varying thicknesses are not reliable, as they often fail to ensure precise separation and stable conveyance, leading to inefficiencies in franking processes.
Innovation Solution
A device featuring a conveyor drum system with friction-promoting rollers and an adjustable painting element that gently separates the lowest package from the stack, ensuring reliable separation and conveyance, while maintaining dimensional stability through a scanning and retaining element and a flexible painting element acting at an acute angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conveyor systems are used to transport stacked mail items, then the system structure is simple, but the separation reliability of the lowest package deteriorates due to insufficient friction and unstable contact
Solution Approach 1:
The patent applies local quality by equipping only the necessary conveyor rollers (front and rear conveyor rollers) with friction-promoting coatings rather than coating all rollers. This localized application of friction-enhancing material ensures reliable separation and transport of the lowest mail package without unnecessarily complicating the entire conveyor system.
Solution Approach 2:
The patent uses composite materials by combining conventional roller structures with friction-promoting coatings (such as rubber-like materials) on specific rollers. This creates a hybrid system that maintains the simplicity of basic conveyor mechanics while adding the functional property of enhanced friction where needed for reliable package separation.
2Adaptability or versatility
If rigid painting elements are used to mark mail items, then the marking precision is high, but the adaptability to varying package thicknesses and formats deteriorates
Solution Approach 1:
The patent applies dynamics by using elastically flexible painting elements that can dynamically adapt their position and contact pressure based on the thickness and format of each mail package. This flexibility allows the same painting device to reliably mark packages of varying dimensions while maintaining adequate marking precision.
Solution Approach 2:
The patent uses parameter changes by employing painting elements with varying elastic properties that can change their physical state (flexibility) in response to different package parameters (thickness, format). This allows the system to adapt to diverse mail items without sacrificing marking effectiveness.
3Reliability
If high friction is applied to grasp the lowest package, then the separation effectiveness improves, but the dimensional stability of the package deteriorates due to excessive friction forces
Solution Approach 1:
The patent applies local quality by applying friction-promoting coatings only to specific areas of the conveyor rollers that contact the lowest package during separation and transport. This localized friction application ensures effective grasping and separation while minimizing overall friction forces that could deform the package, thereby maintaining dimensional stability.
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 solution enables efficient and reliable separation and transport of mail items of different thicknesses, ensuring smooth processing and adaptation to varying package formats, enhancing the stability and rigidity of the system.
Implementation Method 1
As driven conveyor drums, these have a friction-enhancing coating on the circumference, for example made of a rubber-like material, for a better frictional connection with the shipping items.
Data Source
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AI summary
A device for singulating for franking/printing flat mail items (3, 17), such as envelopes, mailing bags, cards, printed products, sleeves, labels or the like., which are individually placed in a feeder (2) or guided as a stack (10) on top of each other at a front edge and are each captured at the bottom of the stack by a singulation device (1), singulated and transported further in a conveying direction (F), wherein the singulation device (1) is formed by a receiving conveying drums (7, 8) which receive the lowest package (17) at the front end in the conveying direction (F) for further transport, and which are mounted transversely to the conveying direction (F) and arranged one behind the other below the stack, forming a conveying plane (9), and a passage opening (15) forming a passage opening (15) with the lower end of a support wall (4) of the feeder (2) and the conveying plane (9), as well as a coating device (16) which acts after the passage opening (15) to coat at least the lowest package (17).