Automated Zipper Slider Clamping Device for Postal Bag Closure
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Solution Overview
Problem
The manual closure of postal bags with zippers remains unreliable and costly due to zipper wear, difficulty in operating worn-out zippers, and the risk of packages blocking the slider during closure.
Innovation Solution
A clamping device with a base, upper and lower jaws, and hydraulic or motor-driven mechanisms to securely clamp the zipper slider from both sides, allowing for automatic closure of the zipper, even when the pull tab is detached, and incorporating a tapered upper jaw to separate sheeting and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual closure of postal bags with zippers is used, then operation flexibility is maintained, but reliability deteriorates due to zipper wear and difficulty in operating worn-out zippers
Solution Approach 1:
The patent replaces the manual mechanical operation of zippers with an automated clamping device that uses a slider to engage and close the zipper. The device includes a clamping unit with movable jaws that grip the slider, eliminating the need for manual manipulation of worn-out zippers and pull tabs. This substitution of manual mechanical operation with an automated mechanical system resolves the contradiction by maintaining reliability while improving ease of operation.
Solution Approach 2:
The clamping device is designed to automatically position and clamp the slider onto the zipper chain without requiring human intervention. The movable jaws self-adjust to grip the slider, and the system autonomously completes the closure operation. This self-service capability eliminates the dependency on manual operation and pull tabs, resolving the reliability issue caused by worn-out zippers.
2Productivity
If manual closure operation is used, then cost is reduced, but productivity deteriorates due to varying rate of success and need to remove packages
Solution Approach 1:
The patent replaces manual closure operations with an automated clamping device that systematically positions and secures the slider. This automation eliminates the need for employees to manually handle heavy bags, shift packages, and attempt repeated closure operations. The device performs the closure task consistently and efficiently, resolving the productivity contradiction by maintaining ease of manufacture while dramatically improving closure efficiency.
Solution Approach 2:
The invention extracts the closure function from manual human operation and isolates it into a dedicated automated clamping device. This separation allows the closure operation to be performed independently without requiring employees to manually manipulate packages or struggle with worn-out zippers. The extraction of this function resolves the productivity issue by eliminating operational complexity while maintaining manufacturing simplicity.
3Productivity
If automatic packaging lines are implemented, then productivity is improved, but device complexity increases due to need for specialized clamping mechanism
Solution Approach 1:
The clamping device is segmented into distinct functional components: a fixed jaw, a movable jaw actuated by a piston, and a slider engagement mechanism. This segmentation allows each component to perform its specific function independently, simplifying the overall design while enabling automated operation. The modular structure resolves the contradiction by maintaining high productivity through automation while managing device complexity through functional decomposition.
Solution Approach 2:
The patent employs a piston-based mechanism to actuate the movable jaw, utilizing pneumatic or hydraulic principles to generate the necessary clamping force. This approach simplifies the actuation system compared to complex mechanical linkages, as the piston can be directly controlled by automated systems. The use of pneumatic/hydraulic actuation resolves the contradiction by enabling automation while keeping the device structure relatively simple and maintainable.
Data Source
AI summary
The present invention relates to a clamping device for clamping at least part of a zipper. The clamping device includes a base, a head including an upper jaw movably connected to a lower jaw, an arm at one end pivotably connected to the base and at another opposite end pivotably connected to the head; and at least one driving means suitable for pivoting the head with respect to the arm. The upper jaw includes a recession for accommodating at least part of a slider of the zipper. The head is movable from an open position, wherein the upper jaw and the lower jaw are spaced apart, to a closed position, wherein a cavity is formed by the recession and the lower jaw; and the slider is securable within the cavity.