Web Superposing Layout for Synchronized Double Bag Feeding
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Solution Overview
Problem
Existing bag making apparatuses require four rolls for producing double bags, leading to potential deviations in feed speeds and increased labor for roll replacements due to slight differences in roll run-out times.
Innovation Solution
A web superposing device that slits and guides webs from two rolls into four panels, using guide mechanisms and dancer rollers to ensure synchronized feeding and superposition, reducing the number of rolls needed to two, and incorporating a feeder, sealer, and cross-cutter for efficient double bag production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If four rolls are used to feed webs for outer and inner panels, then double bag production is enabled, but feed speed deviations and roll replacement frequency increase
Solution Approach 1:
The patent merges the feeding function from four separate rolls into two rolls. Each roll feeds a composite web containing both outer panel and inner panel layers. This consolidation reduces the number of rolling mechanisms while maintaining the capability to produce double bags with consistent feed speed, as fewer independent rolls mean fewer variables causing speed deviations.
Solution Approach 2:
The patent segments the composite web into distinct outer panel and inner panel components through a slitting mechanism. The single composite web from each roll is divided into multiple narrower webs that are then superposed in the correct sequence. This segmentation approach allows one roll to effectively serve the function of multiple rolls while maintaining synchronization.
2Productivity
If four rolls are used for outer and inner panels, then complete double bag components are provided, but labor for roll replacement increases
Solution Approach 1:
By combining multiple web streams into fewer rolls, the patent reduces the number of rolls that need to be monitored and replaced. Two rolls feeding composite webs replace the need for four separate rolls, directly reducing operational labor and maintenance frequency.
3Productivity
If four rolls are used to feed webs, then all panel webs are available, but space requirements increase
Solution Approach 1:
The patent consolidates the web feeding system from four rolls into two rolls that supply composite webs. This spatial consolidation reduces the footprint of the web handling section while still providing all necessary panel webs for double bag production through the composite web structure and slitting mechanism.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A web superposing device slits a first main web with a first slitter into a first outer panel web and a second outer panel web. The superposing device slits a second main web with the second slitter into a first inner panel web and a second inner panel web. The superposing device guides the first and second outer panel webs to a superposing roller pair. The superposing device separates the first and second outer panel webs from each other until the first and second outer panel webs reach the superposing roller pair to form a space between the first and second outer panel webs. The superposing device guides the first and second inner panel webs via the space to the superposing roller pair to superpose these four webs on each other at the superposing roller pair.