Segmented Water Feed Device for Uniform Envelope Flap Moistening
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Solution Overview
Problem
Conventional water feed devices for mail handling machines lack the ability to adjust water quantity based on envelope type and size, leading to non-uniform moistening of envelope flaps, especially when the conveyor table is inclined, resulting in poor sticking quality and potential bleeding of postage imprints.
Innovation Solution
A water feed device with at least two distinct water feed circuits and compartments in the reservoir, allowing for varying water levels and quantities across the flap width, utilizing independent shut-off valves to control water flow and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single water-quantity setting is used in the water feed device, then the device structure is simple, but the quality of sticking down is degraded for certain types of envelope and the flap is not moistened uniformly
Solution Approach 1:
The patent divides the single water feed circuit into multiple separate water feed circuits (at least two), each feeding water to different compartments of the reservoir. This segmentation allows independent control of water levels in different regions, enabling uniform moistening across the entire flap width while maintaining reasonable device complexity through modular design.
Solution Approach 2:
The patent implements different water levels in different compartments of the reservoir, creating local variations in water quantity. The first compartment has a first water level and the second compartment has a second water level, allowing each region to provide the appropriate amount of water for its specific location on the flap, thereby achieving uniform moistening across the entire flap width.
2Manufacturing precision
If the water level is defined to moisten properly the portion of the flap close to where it meets the body of the envelope, then the tip of the flap is not moistened correctly
Solution Approach 1:
The patent segments the water feed system into multiple independent circuits with separate compartments, allowing each compartment to have its own water level setting. This enables the system to simultaneously satisfy different moistening requirements at different locations on the flap without compromising overall adaptability.
Solution Approach 2:
The patent changes the water level parameter across different compartments - the first compartment has a first water level and the second compartment has a second water level. This parameter variation allows the system to adapt to different envelope types and sizes by adjusting water levels in specific compartments, thereby improving both moistening uniformity and adaptability.
3Manufacturing precision
If the water level is defined to moisten properly the tip of the flap, then the portion of the flap close to where it meets the body of the envelope is moistened abundantly, resulting in postage imprint bleeding
Solution Approach 1:
The patent divides the water feed system into separate compartments with independent water levels, preventing over-moistening in any single region. By controlling water distribution locally in each compartment, the system avoids excessive water application that would cause postage imprint bleeding while ensuring adequate moistening where needed.
Solution Approach 2:
The patent applies different water levels in different compartments to match the specific moistening requirements of different flap regions. This local quality control ensures that water is applied appropriately at each location - enough to moisten the tip correctly without over-moistening the portion near the envelope body, thereby preventing postage imprint bleeding.
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
Ensures uniform moistening of envelope flaps regardless of size, preventing postage imprint bleeding and maintaining print quality.
Implementation Method 1
a piece of foam dips in part into the reservoir of water... the envelopes are moistened as the flaps of the envelopes pass between the top surface of the moistened piece of foam
Data Source
AI summary
A water feed device for feeding water to a moistener for moistening envelope flaps that is incorporated into a mail handling machine, the water feed device comprising a reserve stock of water from which a quantity of water flows to a reservoir of water, said quantity of water being suitable for imbibing a piece of foam dipping in said reservoir of water, said device having at least two distinct water feed circuits for feeding water separately to two separate compartments of the reservoir of water from two isolated compartments of the reserve stock of water in a manner such as to define two distinct levels of water for the two isolated compartments of the reserve of water, and thus to define two different heights of water in the two corresponding separate compartments of the reservoir of water.