Pinch Bottom Sack Side-Mounted Load Element
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Solution Overview
Problem
Conventional sacks with integrated handles face challenges in mechanical strength, ease of handling, and manufacturing complexity, particularly when trying to balance load distribution and maintain a clean, aesthetically pleasing design, especially when filled with heavy bulk materials like cement.
Innovation Solution
A sack design featuring a load element that protrudes externally when loaded, integrated into the fabric's surface element, allowing for efficient load distribution and easy handling, with a pinch-bottom structure and side gusset for improved stability and ease of use, utilizing a woven fabric with a plastic layer for strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If handles are arranged in the filling area of the sack, then ease of handling is improved, but the appearance is impaired and material requirements increase
Solution Approach 1:
The handle is repositioned from the traditional filling area (top) to the side area of the sack. This spatial relocation allows the handle to be integrated into the side gusset structure, maintaining ease of handling while preserving the clean appearance of the filling area and reducing material requirements.
2Ease of operation
If handles are arranged in the filling area, then ease of handling is improved, but the closure element cannot be properly positioned
Solution Approach 1:
By moving the handle arrangement to the side area, the closure element can be properly positioned at the top filling area without interference. The side-mounted handle allows the closure to be integrated into the top surface element, ensuring proper sealing functionality.
3Strength
If high strength is achieved through fabric structure, then load capacity is improved, but functional elements become difficult to attach
Solution Approach 1:
The sack is divided into distinct functional areas: the top surface element for filling and closure, and the side surface element with integrated handle. This segmentation allows the high-strength fabric structure to be maintained in critical load-bearing areas while providing dedicated zones for functional elements, simplifying the attachment process.
4Ease of operation
If large covering material is used for handle arrangement, then ease of handling is improved, but the volume for bulk material is reduced
Solution Approach 1:
relocating the handle to the side area eliminates the need for extensive covering material in the filling area. The handle is integrated into the side gusset structure, maximizing the internal volume available for bulk material while maintaining ease of handling through the side-mounted load element.
Data Source
Figure 1~2b
Figure 3~5a
Figure 5b~6
AI summary
The invention relates to a sack (1), in particular a pinch bottom sack, which can be filled with a bulk material, comprising a cover (2) with at least one surface element (3), wherein the cover (2) comprises a fabric and the surface element (3) comprises a handle (10) which includes a load element (11) on which a load-bearing force (4) can be applied for lifting the sack (1). The invention further relates to a method for manufacturing a sack.