Resilient Sheet Guide for Warped Envelope Handling
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Solution Overview
Problem
Existing enveloping devices are limited by high manufacturing costs due to numerous fast-moving parts, generate unwanted vibrations, and require different envelope sizes for varying contents, making them inefficient and prone to damaging warped or irregularly shaped envelopes.
Innovation Solution
A packing pocket with a resilient sheet guide and lamellae arrangement that maintains consistent feed speed for different envelope thicknesses, preventing premature contact and allowing for the processing of warped envelopes, combined with a modular design that eliminates the need for moving parts and supports flexible envelope handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotatably mounted packing bag with cam-controlled levers is used, then packaging speed can be doubled, but manufacturing cost increases and vibrations occur that limit further performance improvement
Solution Approach 1:
The invention extracts and eliminates the cam-controlled lever mechanism and rotatable mounting, replacing them with a fixed packing pocket. This removal of complex moving parts directly reduces manufacturing cost and eliminates vibrations while maintaining high packaging speed through the streamlined fixed structure.
Solution Approach 2:
Instead of using a movable rotatable packing bag as in prior art, the invention inverts the approach by employing a fixed packing pocket. This inversion eliminates the need for complex motion control mechanisms while achieving the desired packaging speed through a simpler, vibration-free design.
2Object-affected harmful factors
If the packing pocket uses a fixed structure without movement, then vibrations are eliminated, but packaging speed cannot be increased further
Solution Approach 1:
The invention replaces the cam-controlled mechanical lever system with a fixed structural design. The packing speed is maintained through optimized feed device mechanics and envelope transport synchronization rather than through rapid mechanical motion of the packing pocket itself, eliminating vibrations while preserving productivity.
3Manufacturing precision
If different envelope sizes are mounted for each envelope width, then optimum guidance is achieved, but device complexity and changeover time increase
Solution Approach 1:
The invention introduces adjustable guide blades that can be dynamically repositioned to accommodate different envelope widths. This dynamic adjustment capability allows the fixed packing pocket to optimally guide various envelope sizes without requiring complete component changes, maintaining precision while reducing complexity.
Solution Approach 2:
The guide blades are designed with multi-functionality, serving both as positioning elements and as adjustable width adaptors. This universal design allows a single guide blade assembly to handle multiple envelope sizes, eliminating the need for separate mounted components for each envelope width.
4Productivity
If the envelope and contents are pushed together during filling, then filling speed increases, but warped or irregular envelopes may be damaged
Solution Approach 1:
The feed device is designed to preliminarily separate the envelope from its contents during the feeding process, maintaining a gap until the envelope is properly positioned in the fixed packing pocket. This preliminary separation action prevents damage to warped envelopes while still enabling high-speed filling through synchronized transport and controlled insertion.
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
Significantly increases packaging speed, reduces mechanical stress, and enables reliable processing of envelopes of varying quality and shape without vibration, achieving up to 30,000 to 40,000 packs per hour with improved envelope handling capabilities.
Implementation Method 1
the sheet guide is designed to be resilient, at least in a front area of the pannier with respect to the envelope feed
Implementation Method 2
The spring action of the sheet guide is advantageously set in such a way that a feed speed of the envelope contents is essentially maintained for envelope contents of different thicknesses
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a packing pocket for a device (1) for inserting material into envelopes for sliding the envelope contents (5) into an envelope (2), wherein the device (1) for inserting material into envelopes comprises: a holder (6) for empty envelopes; a flap opener (7) for opening an envelope flap (3) of the envelope (2); transport members (8), for transporting the envelope (2) from the holder (6) to the packing pocket (9), on which the envelopes (2) are filled; a supply device (10) for supplying the envelope contents (5) to the packing pocket and into the packing pocket (9); and dispatch members (11) for passing on the filled envelope (2). In addition, the packing pocket (9) also comprises a mid-line (M) in relation to a transport direction of the envelope, as well as a number of slats (28) which are parallel to the mid-line (M), and which are arranged on a plane (K) together with a flap guide (13) The slats (28) are mounted on the device (1) for inserting material into envelopes, on a mounting rail (15) or on an adjustment rail (35), wherein at least one or more slats (28) are associated with a sheet guide (30) arranged at a distance from the flap guide (13). In addition, the sheet guide (30) is arranged in a spring-like manner substantially in relation to the flap guide (13), at least in a region of the packing pocket (9) that is upstream of the envelope supply.