Paper Bag Carrying Handle Integrated Into Top Fold
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Solution Overview
Problem
Existing paper bags for hygiene products lack an integrated handle solution, which is challenging to implement without significant efficiency losses and material disruptions in the manufacturing process, and require a design that minimizes material usage and avoids tearing, while ensuring reliable adhesion and force distribution.
Innovation Solution
A paper bag with a carrying handle integrated into the top fold, attached via flat seams, using a supercalendered paper strip with a heat-sealable coating, ensuring minimal material usage and seamless integration with the bag design, and distributing tensile forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a paper handle is integrated into the bag manufacturing process, then the handle is seamlessly integrated without additional material disruptions, but this would require massive investments across many production lines and result in efficiency losses
Solution Approach 1:
The patent extracts the handle attachment process from the main bag manufacturing line and performs it separately during bag conversion. The handle is attached to the finished or semi-finished bag rather than being integrated into the continuous web production, thus avoiding disruptions to the main manufacturing process while still achieving handle integration.
Solution Approach 2:
The bag is prepared in advance with specific features (flat seams, top fold structure) that facilitate subsequent handle attachment. The continuous web is manufactured with predetermined characteristics that make it ready for handle integration during the conversion phase, before the bag reaches the consumer.
2Ease of manufacture
If additional material is applied to the paper web for the handle, then the handle can be attached to the bag body, but this causes friction or disruption in the manufacturing process
Solution Approach 1:
The handle attachment process utilizes the existing bag structure and materials rather than requiring complex additional components. The flat seams and top fold of the bag serve as the attachment mechanism, eliminating the need for separate fastening elements that would cause friction or disruption during manufacturing.
3Loss of substance
If the handle material is made as thin as possible to minimize material usage, then material consumption is reduced, but the handle tears very quickly especially when mechanically weakened
Solution Approach 1:
The patent changes the physical parameters of the handle material by applying a coating that increases strength and tear resistance. This allows the use of thinner base paper while maintaining durability through the enhanced surface properties provided by the coating.
Solution Approach 2:
The handle consists of a composite structure combining thin paper with a strengthening coating. This multi-layer construction provides both the low material consumption of thin paper and the enhanced durability of the coating layer, resolving the contradiction between thickness and strength.
4Strength
If the handle is attached using adhesive or heat sealing to achieve adhesion, then the handle is securely attached, but the peel tensile forces that occur when the handle is used pose a challenge
Solution Approach 1:
The patent transitions from point or line attachment to surface attachment by utilizing the entire flat seam area as the attachment zone. This distributes the peel tensile forces across a larger area, reducing stress concentration and improving reliability under load.
Solution Approach 2:
The coating is applied in advance to the handle material before attachment, preparing the surface for optimal adhesion. This preliminary surface treatment ensures that when the handle is attached during conversion, the adhesive or heat sealing process achieves maximum bonding strength from the outset.
5Strength
If an adhesive or heat-sealing coating is applied to attach the handle, then adhesion is achieved, but this requires a relatively large contact surface for adhesion to the bag body
Solution Approach 1:
The patent utilizes the natural three-dimensional structure of the bag's top fold and flat seams to create attachment surfaces. By attaching the handle to the folded structure rather than a flat surface, the effective contact area is increased without requiring additional material or space on the bag body.
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
The solution allows for efficient production with minimal material and tool disruptions, providing a durable and discreet handle that prevents tearing and ensures comfortable handling without damaging the bag.
Implementation Method 1
using a supercalendered paper strip with a heat-sealable coating
Data Source
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AI summary
A paper bag (1) for containing hygiene articles, in particular diapers, comprising a bag body formed from a one-piece material web, said bag body having a front wall (2) and a rear wall (3) folded back onto said front wall, the front wall (2) and the rear wall (3) being connected to one another via lateral flat seams (4), a closable bag opening (5) being arranged at one of the longitudinal ends of the paper bag (1), and a head fold being inserted between the front and rear walls (2, 3) being arranged at the opposite longitudinal end, the head fold having at least two mutually facing head fold sections (7, 8), characterized in that the paper bag (1) further comprises a carrying handle (9), for example made of paper, which is attached to the bag body in the region of the head fold. The invention further relates to a corresponding method for producing a paper bag.