Envelope Transport System With Angled Intersecting Feed Paths
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Solution Overview
Problem
Flap-up and flap-down inserter designs face reliability issues due to complex envelope feed paths, with flap-up designs requiring additional steps and flap-down designs necessitating complex right-angle turns, affecting the efficiency and reliability of envelope insertion processes.
Innovation Solution
An envelope transport system with intersecting feed paths, where the first path transports the envelope from the supply to the insertion location with a closed end as the leading edge, and the second path transports the envelope with an insert from the insertion location to the output, allowing for a flap-down insertion position and eliminating the need for complex right-angle turns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flap-down insertion is used to simplify the collation building process, then the address-bearing document remains on the bottom and collation can be built more simply, but a complex feed path including a right angle turn is necessary to locate the envelope hopper on the operator side
Solution Approach 1:
The patent applies dimensionality change by transitioning from a horizontal feed path to a vertical feed path. The envelope hopper is positioned above the insertion deck, and envelopes are fed vertically downward through a guide tube onto the insertion deck. This vertical dimension eliminates the need for complex right-angle turns in the feed path while maintaining flap-down insertion geometry.
2Device complexity
If flap-up insertion is used to allow linear envelope path from hopper to insertion location, then the envelope path is substantially linear and hopper can be located on operator side, but additional steps are required to place address-bearing document on top of collation
Solution Approach 1:
The patent inverts the traditional flap-up insertion geometry by using flap-down insertion. Instead of having the envelope flap above the collation, the flap is positioned below the collation. This inversion allows the address-bearing document to remain on the bottom during collation building, eliminating the need for additional steps to place it on top, while still achieving a simple linear envelope path through vertical feeding.
3Ease of operation
If complex feed paths with right angle turns are used in flap-down inserter designs, then the envelope hopper can be located on the operator side, but the reliability of the envelope insertion process is reduced
Solution Approach 1:
The patent resolves the reliability issue by changing the feed path from horizontal with right-angle turns to vertical. The envelope hopper is positioned above the insertion deck, and envelopes are fed vertically downward through a guide tube. This vertical dimension provides a more reliable feed path with fewer directional changes, reducing the likelihood of envelope misalignment or feeding errors while still allowing operator-side access to the hopper.
Data Source
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AI summary
An apparatus includes a first feed path (230) configured to transport an envelope (112) from an input at an envelope supply (200) to an insertion location (216), and a second feed path (232) configured to transport the envelope (112) with a mail piece insert therein from the insertion location (216) to an output. The first and second feed paths (230, 232) intersect at an intersection (208) spaced from the insertion location (216). The paths are angled relative to each other at the intersection (208)