Bag Web Peripheral Guide Holes for Conveyor Alignment
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Solution Overview
Problem
Existing bag web technologies face challenges in achieving a high filling rate and cost-effective production of bags with side and bottom folds, as they often require complex guide systems and may experience axial slipping and deviation issues during conveyor processes.
Innovation Solution
A continuous bag web design featuring superposed film webs with additional film pieces forming sides or bottom, equipped with guide holes or star perforations for secure retention and guidance through a filling station, allowing for simultaneous opening, filling, and closing of bags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If simple rolled flat film web without local thicknesses is used, then manufacturing cost is reduced, but guidance of opposite edges and engagement with chains becomes problematic
Solution Approach 1:
The patent applies local quality by creating peripheral strip areas with holes or star perforations at specific locations (the edges) of the film web. These localized features provide guidance and engagement functions only where needed, while the rest of the web remains simple and cost-effective. This resolves the contradiction by adding functionality only at critical locations without compromising overall manufacturing simplicity.
Solution Approach 2:
The patent implements preliminary action by pre-forming the peripheral strip areas with holes or star perforations during the web formation process, before the web reaches the filling station. This preliminary preparation ensures that the edges are ready for immediate engagement with guide means and chains, eliminating the need for complex real-time adjustments and improving reliability without increasing manufacturing complexity.
2Device complexity
If flat tubular web with continuous cutting and unfolding is used, then device complexity is reduced, but axial slipping and level deviation occur during conveyance
Solution Approach 1:
The patent applies local quality by providing peripheral strip areas with holes or star perforations at the edges of the web. These localized features engage with guide means to prevent axial slipping and maintain level alignment during conveyance, while the rest of the web structure remains simple and continuous. This resolves the contradiction by providing precision only where needed at the edges without complicating the overall device.
Solution Approach 2:
The patent uses guide means as an intermediary element that interacts with the peripheral strip areas (holes or star perforations) to control and stabilize the web during conveyance. This intermediary system prevents axial slipping and level deviation without requiring complex integrated structures, thereby maintaining manufacturing precision while keeping device complexity manageable.
3Productivity
If high filling rate is achieved with continuous web conveyance, then productivity increases, but secure engagement and alignment of bag edges becomes more difficult
Solution Approach 1:
The patent implements preliminary action by pre-forming peripheral strip areas with holes or star perforations at the edges of the web before conveyance. This preparation ensures that secure engagement with guide means is established immediately upon entry into the filling station, maintaining high productivity while guaranteeing reliable edge alignment and engagement throughout the continuous filling process.
Solution Approach 2:
The patent applies local quality by concentrating engagement features (holes or star perforations) in peripheral strip areas at the edges of the web. This localized feature distribution provides secure engagement points for guide means without interfering with the continuous conveyance and filling operations, thereby maintaining high filling rates while ensuring reliable edge control.
Data Source
AI summary
There is disclosed a bag web for packing articles in film bags provided as a contiguous web. At an opening edge, the bag web is provided with peripheral strip areas having holes intended for guide connection with guide means that can retain and guide the bags along a conveyor path through a filling station. The bag items will thus be contiguous along an upper edge, which is used for guiding. The bag webs include the film webs forming opposing front and back sides of the bag and additional film pieces disposed between the flat sides of the bag in order thereby to form side or bottom, or both side and bottom, of the bag. By such a bag web is achieved a particularly simple and rapid filling of the type with stand bottom and with folded side edges.