Fitted Mattress Cover With Diagonal Elastic Band Corner Attachment
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Solution Overview
Problem
Existing fitted sheets with diagonally extending elastic bands face issues with durability and connection strength, particularly when subjected to abnormal use, leading to potential detachment and manufacturing inefficiencies.
Innovation Solution
The design incorporates a fabric body with diagonally extending elastic bands secured using a stitching method that involves folding the bands between layers of fabric and elastic binding, ensuring they remain connected through secure stitches, reducing material usage, and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic bands are secured using conventional attachment methods, then the bands provide strong retention onto the mattress, but the bands may pull away from the sheet at the point of attachment when subjected to abnormal use such as lifting the mattress
Solution Approach 1:
The patent transitions from a single-layer attachment method to a multi-layer sandwich construction. The elastic band is positioned between the elastic binding and the fabric body, creating a three-dimensional layered structure that distributes stress across multiple layers rather than concentrating it at a single attachment point. This dimensional change prevents the band from pulling away during abnormal use.
Solution Approach 2:
The patent creates a composite structure combining the elastic binding, fabric body, and elastic band into an integrated assembly. These different materials work together to provide both the retention function of the elastic band and the structural support of the fabric and binding, resulting in a connection that is stronger and more reliable than any single component alone.
2Strength
If multiple securing methods such as bar tacks are used to prevent band detachment, then the connection strength is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the attachment function into a single integrated sandwich construction step where the elastic band is positioned between the binding and fabric body and secured with stitching. This combines multiple securing functions into one manufacturing operation, eliminating the need for separate bar tacks or supplementary securing means while maintaining strong connection strength.
Solution Approach 2:
The patent extracts and eliminates unnecessary components such as bar tacks and supplementary securing means from the construction. By relying on the sandwich construction itself to provide the securing function, the design removes extraneous elements that would complicate manufacturing and increase cost.
3Strength
If strong elastic bands are used to ensure durability, then the bands resist tearing at intermediate points, but the bands may still pull away from the sheet at attachment points under abnormal loads
Solution Approach 1:
The patent provides beforehand cushioning by positioning the elastic band between the elastic binding and fabric body, creating a cushioning layer that absorbs and distributes abnormal loads. This sandwich construction acts as a protective barrier that prevents direct transmission of high stresses to the attachment points, thereby preventing band detachment even under abnormal conditions.
4Ease of manufacture
If conventional attachment methods are used, then the manufacturing process is simple, but the connection may fail during abnormal use leading to product recalls and loss of consumer confidence
Solution Approach 1:
The patent maintains manufacturing simplicity while improving reliability by transitioning to a multi-layer sandwich construction. The elastic band is positioned between the binding and fabric body and secured with stitching, creating a three-dimensional structure that enhances reliability without significantly complicating the manufacturing process.
Solution Approach 2:
The patent creates a composite assembly of elastic binding, fabric body, and elastic band that provides superior reliability. This composite structure ensures that the connection withstands abnormal use conditions, preventing product failures and associated costs while remaining economical to manufacture.
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 provides a durable, wrinkle-free fit that prevents elastic bands from detaching during abnormal use, while being more economical and ergonomically superior, ensuring a snug and secure fit on mattresses.
Implementation Method 1
an elastic binding (40) is disposed around a continuous lower edge of the covering and extends along at least a portion of the length of the lower edge of the covering
Implementation Method 2
a supplementary securing means (54) is provided. Specifically, as shown in FIG. 3, the end of each band 50 is secured to the sheet by folding band 50 over the upper edge of binding 40
Data Source
AI summary
A fitted mattress covering for a mattress includes lower edge portions, which may be inverted J-shaped portions, mirror-image inverted J-shaped portions, portions that terminate at an end, or inverted U-shaped portions. The covering side and end portion lower edges may join one another to form a continuous lower edge of the covering. For the J-shaped portion, an elastic binding may be disposed under a downwards folded portion. The elastic binding may extend at least partially along the length of the lower edge of the covering. An elastic band may be disposed at each corner of the covering and extend diagonally across the associated corner and have opposite ends secured adjacent one of the side portions and adjacent one of the adjacent end portions, respectively. The bands may be secured in place by stitching and/or by supplementary securing means to ensure that the bands do not pull away from the covering.