Expandable Paper Sack for Mattress Packaging
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Solution Overview
Problem
Current methods for packaging large, heavy objects like mattresses are not environmentally friendly, as they often require plastic film that cannot be easily replaced by paper sacks due to mechanical tension issues during rolling and filling.
Innovation Solution
A method and paper sack design that allows the sack's length to increase by using a filler device with a filler neck, where the object is inserted until it contacts the closed end, causing the sack's length to expand, and the open end is sealed afterwards, utilizing multiple sliding paper layers or inflating elements to manage the expansion without tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a paper sack is used to package large objects like mattresses, then environmental friendliness is improved, but the sack cannot withstand mechanical tension during rolling and filling
Solution Approach 1:
The paper sack is designed with expandable length through relative movement of paper layers. The sack transitions from a compact initial state to an expanded state during filling, allowing it to accommodate large objects like mattresses while maintaining structural integrity throughout the process.
Solution Approach 2:
The paper sack consists of multiple paper layers that can move relative to each other. This segmentation allows the sack to expand in a controlled manner, with each layer contributing to the overall length increase while maintaining individual layer strength and integrity.
2Volume of moving object
If the paper sack length is increased to accommodate large objects, then packaging capacity is improved, but the sack may open or tear under tension
Solution Approach 1:
The paper sack employs dynamic length adjustment through relative movement of paper layers. The sack expands from an initial compact length to a final extended length as objects are inserted, with the paper layers moving relative to each other in a controlled manner to prevent tearing while achieving the required packaging capacity.
3Productivity
If the object is compressed in the filler device to fit in the sack, then filling efficiency is improved, but the object may be damaged
Solution Approach 1:
The paper sack is prepared in advance with the capability for length expansion. Multiple paper layers are arranged and configured before the filling process, allowing the sack to accommodate compressed objects during filling and then expand to protect them, eliminating the need for additional decompression steps.
Data Source
AI summary
The invention relates to a method for packaging an object in a paper sack which has a first open end and a second closed end opposite the first end, said ends being spaced apart from each other by a length L of the paper sack, the method comprising the following steps: arranging the paper sack on a filler neck of a filler device, inserting the object into the open end of the paper sack until the object is in contact with the closed end, inserting the object further into the paper sack, so that the second, closed end moves away from the first, open end and the length L of the paper sack increases.