Single Thread Sewn Gunny Sack with Clip Tape and Identification
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Solution Overview
Problem
Conventional sewing-type gunny sacks incur high manufacturing costs due to the use of binding and opening threads, and users often struggle to distinguish between them, leading to difficulties in opening the sack. Additionally, easy-open bags with folded tops require expensive special paper and additional fabrication processes, increasing production costs.
Innovation Solution
An easy-to-open gunny sack design featuring a clip tape covering the ends with single-thread sewing, an extended clip tape portion with anti-loosening means, and an opening identification tape to facilitate easy opening, reducing production costs and preventing loosening of the sewing section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional sewing-type sack with binding thread and opening thread is used, then sewing strength is improved, but manufacturing cost increases and ease of operation deteriorates
Solution Approach 1:
The invention divides the single thread into two functional sections: a binding section that provides strong sewing connection and an opening section that is easy to pull and break. This segmentation allows the thread to serve dual purposes - maintaining strong closure while enabling easy opening by the user.
Solution Approach 2:
The invention uses different colors for the binding section and opening section of the thread. The opening section is made in a color that contrasts with the binding section, making it visually distinct and easy for users to identify which part to pull for opening the sack.
2Strength
If conventional sewing-type sack with binding thread and opening thread is used, then sewing strength is improved, but manufacturing cost increases
Solution Approach 1:
The invention merges the functions of binding thread and opening thread into a single integrated thread structure. This eliminates the need to manufacture and assemble two separate threads, simplifying the manufacturing process and reducing material costs while maintaining the required sewing strength.
Solution Approach 2:
The single thread is designed to perform multiple functions: it serves as both the binding thread for strong sewing and the opening thread for easy opening. This multi-functionality reduces the overall component count and manufacturing complexity, leading to cost savings.
3Ease of operation
If easy open bag with folded portion and sealing paper tape is used, then ease of operation is improved, but manufacturing cost increases
Solution Approach 1:
The invention uses a simple, inexpensive single thread that can be easily broken after one use, replacing the need for expensive special paper and complex sealing tapes. The thread serves its purpose of sealing and opening the sack effectively without requiring durable or specialized materials.
Solution Approach 2:
The invention extracts and eliminates the complex folded portion structure and sealing paper tape from the design, retaining only the essential single thread for sealing and opening functions. This simplification dramatically reduces manufacturing costs while maintaining ease of operation.
Data Source
AI summary
An easy-to-open gunny sack sewn by a single thread is disclosed. The easy-to-open gunny sack minimizes the costs of sewing a gunny sack through single thread sewing, allows a user to easily open the sack, prevents a sewing-finished section formed by single thread sewing from being easily loosened, and allows the user to easily identify an opening identification tape and to open the sack using the opening identification tape. The easy-to-open gunny sack allows a clip tape (20) to cover at least one of upper and lower ends of a sack portion, allows a single-thread sewing portion (10) by single thread sewing to be formed around the covered portion, allows an extended clip tape portion (21) formed by extension of the clip tape to be formed at both sides of the single-thread sewing portion (10), and allows an anti-loosening means to be provided at the extended clip tape portion (21) of the end portion placed in a sewing proceeding direction.