Self-Mating Zipper on Carton Flat Unfolded Attachment
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Solution Overview
Problem
The manufacturing process for semi-rigid or rigid cartons with polymeric reclosable headers is complex due to the requirement of multiple folds and specific construction methods, which complicates the attachment of zipper-type reclosable elements.
Innovation Solution
A self-mating zipper profile is attached directly to the top edge of the carton in its flat unfolded state, either as segments or a continuous strip, simplifying the manufacturing process and allowing for reduced folds, with the option to incorporate a flexible film strip with an integral zipper profile above the box blank.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional zipper attachment methods are used with multiple folds and specific construction methods, then the zipper can be attached to the carton, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The zipper profile is attached to the carton in its flat unfolded state before folding, performing the attachment action in advance when the structure is simplest. This preliminary attachment avoids the need for complex folding operations during assembly, directly resolving the contradiction between manufacturing simplicity and structural complexity
Solution Approach 2:
The zipper is divided into discrete segments that can be independently attached to the carton edges. This segmentation allows for simpler manufacturing processes compared to attaching a continuous zipper structure, as each segment can be processed and attached separately, reducing overall construction complexity
2Manufacturing precision
If multiple folds are required in the carton construction, then the zipper can be properly positioned, but the number of manufacturing steps increases
Solution Approach 1:
The zipper profile is pre-positioned and attached to the flat unfolded carton before folding operations. This preliminary positioning ensures accurate zipper placement without requiring complex folding steps, thereby maintaining manufacturing precision while increasing productivity by reducing the number of manufacturing steps
Solution Approach 2:
Instead of folding the carton first and then positioning the zipper, the invention inverts the sequence by attaching the zipper to the flat unfolded carton first. This reversal of the traditional sequence eliminates the need for multiple folds during assembly, maintaining positioning accuracy while significantly improving manufacturing speed
3Stability of the object's composition
If the zipper is attached after folding and gluing, then the carton structure is formed, but the attachment process becomes more difficult
Solution Approach 1:
The zipper profile is attached to the flat unfolded carton before folding and gluing operations. This preliminary attachment is performed when the carton structure is most accessible and stable in its flat state, making the attachment process easier compared to attempting to attach the zipper after the carton is folded and glued, while still ensuring the zipper is properly positioned in the final structure
Data Source
AI summary
The present disclosure relates to rigid or semi-rigid cartons with zipper-type reclosable elements, particularly self-mating zippers. The cartons can be formed from blanks which have a self-mating zipper on the inside of the carton. Additionally, the zipper can be attached to a flexible film which is, in turn, attached to the package.