Who patented a machine for making paper bags?2025 New

When you walk through a shopping center, you see many passersby holding paper bags—some filled with coffee, some with clothing and jewelry, and some with newly purchased luxury bags. Perhaps you'd be surprised to learn that these exquisite paper bags are mass-produced by machines utilizing dozens of patented technologies. Behind these machines lies Zhejiang Zenbo Intelligent Machinery Co., Ltd., leveraging its 65 patented technologies to continuously lead the development sheet-fed paper bag manufacturing industry.

1. The Innovation Behind The Patent: From Manual Paper Bag Production to Automated Manufacturing

Traditional handmade paper bags rely heavily on skilled labor. Purely manual production involves more than eight steps, with an average worker producing 300 bags/hour and a skilled worker 1,000 bags/hour. The more complex the bag structure, the lower the yield. Furthermore, due to manual instability, defective products can reach as high as 10%-12%.

Zenbo's patented paper bag machine technology is designed to address the many drawbacks of manual paper bag production, thereby reducing waste and labor costs for paper bag factories, increasing production efficiency, and ultimately boosting profitability.

2. Core Patented Technology (Partial Display)

(1) Automatic paper bag turning around unit:

Traditional paper bag machines fold the bottom at the glue side. This results in the glue easily breaking at the fold, causing the paper bag to rupture. The core design of the automatic turning around unit solves this problem.

(2) Prop up bag bottom and insert bottom card unit:

Zenbo's new design insert bottom card unit adopts servo motors control, which increases the service life of the entire structure compared to the previous cylinder structure.

(3)Servo reinforce top card unit:

The top card uses a servo motor to control the swing arm system. The air pump automatically sucks and places the top cards, ensuring that the top card is attached to the moving paper without inertia.

(4)Top folding unit:

The creasing roller and the impacting device work together to ensure that the folding position of the paper bag is not deviated and will not affect the insert pasting.

3. How Patents Lead the Paper Bag Machine Industry

From the user's perspective, we continuously innovate paper bag machine structures to meet the increasingly diverse needs of paper bag orders. While ensuring precision, we also enhance machine durability, truly saving companies cost. Through continuous machine improvements, Zenbo's paper bag machines have been imitated but never surpassed, leading the paper bag machine industry forward.

4. Patents reflect R&D capabilities.

Zenbo's 65 patents are the result of continuously increasing R&D investment and cultivating its R&D personnel. Therefore, Zenbo possesses strong capabilities in customizing machines for specific customer needs.

Therefore, patents are a testament to Zenbo's strength in the Paper Bag Making industry. The value of a patent is more than just a serial number; it represents a company's value to its users and its voice within the industry. If you're looking for paper bag making solutions, please contact us.