Plastic Bag Making Apparatus with Simplified Panel Guide
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Solution Overview
Problem
Existing apparatus for making plastic bags with panel, side gusset, and bottom gusset portions requires complex panel material guide structures due to the need to fold and unfold webs of panel material, making the process inefficient.
Innovation Solution
The apparatus simplifies the process by folding one web of panel material, forming open surfaces, and superposing the bottom gusset material without folding it back or unfolding the panel material, using cross and longitudinal seal means to heat seal the gusset and panel materials with open surfaces maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the web of bottom gusset material is folded back and one web of panel material is unfolded to interpose the bottom gusset material, then the bottom gusset portion can be formed, but the panel material guide means becomes complicated in structure
Solution Approach 1:
The patent extracts the bottom gusset material formation process from the panel material guide system. Instead of using the panel material guide means to fold back and unfold the bottom gusset material, the invention uses a separate bottom gusset material supply means that directly supplies the bottom gusset material to be interposed between the panel materials, thereby simplifying the panel material guide means structure while maintaining the ability to form the bottom gusset portion
Solution Approach 2:
The patent segments the material supply functions into separate means: panel material guide means for guiding panel materials, and a separate bottom gusset material supply means for supplying bottom gusset material. This segmentation allows each means to be optimized for its specific function without the complexity of handling multiple material manipulation operations, resolving the contradiction between manufacturing precision and device complexity
2Manufacturing precision
If the web of bottom gusset material is folded back and panel material is unfolded, then the bottom gusset portion can be formed, but the process requires more steps reducing productivity
Solution Approach 1:
The bottom gusset material is prepared and supplied in advance by the bottom gusset material supply means before the heat sealing process. This preliminary action eliminates the need for folding back and unfolding operations during the main production process, reducing the number of steps required and improving successive production efficiency while maintaining manufacturing precision
Solution Approach 2:
The patent enables continuous supply of bottom gusset material through the bottom gusset material supply means, eliminating interruptions caused by folding back and unfolding operations. This continuous action maintains the flow of production without stopping for additional manipulation steps, thereby improving productivity while ensuring proper formation of the bottom gusset portion
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
This approach allows for the successive production of plastic bags with reduced complexity in the panel material guide structure, enabling efficient formation of side and bottom gusset portions without the need for folding or unfolding, thus enhancing production efficiency.
Implementation Method 1
the web of bottom gusset material and the auxiliary gusset portion are heat sealed with each other while the webs of panel material and the sheet of side gusset material are heat sealed with each other
Data Source
AI summary
A sheet of side gusset material 3 is folded into halves, superposed into two layers and interposed between webs of panel material 1 and 2. One of the webs of panel material 1 is folded along a longitudinal folded line 8 to make the webs of panel material 1 and 2 open and make an open surface formed on the webs of panel material 1 and 2. One of the layers of side gusset material 3 is folded along the longitudinal folded line 8 to make the layers of side gusset material 3 open along with an auxiliary gusset portion 7 and make an open surface formed on the layers of auxiliary gusset portion 7. A web of bottom gusset material 4 is superposed on the open surfaces of panel material 1 and 2 and auxiliary gusset portion 7. The web of bottom gusset material 4 and the auxiliary gusset portion 7 are heat sealed with each other while the webs of panel material 1 and 2 and the sheet of side gusset material 3 are heat sealed with each other widthwise of the webs of panel material 1 and 2 with the open surfaces kept being formed. The web of bottom gusset material 4 and at least one of the webs of panel material 1 are heat sealed with each other longitudinally of the webs of panel material 1 and 2 with the open surfaces kept being formed.