Fitted Sheet Corner Sewing System for Secure Mattress Attachment

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing fitted sheets are not securely attachable to mattresses in harsh environments and cannot be used on one-piece beds, prone to shifting or being accidentally pulled off, and lack strap loop compatibility.

Innovation Solution

A fitted sheet design with four corners featuring a sewing system comprising first and second hems joined by a third seam, reinforced by a fourth seam, ensuring secure attachment to any mattress type and allowing strap loop access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If Velcro fasteners are used to secure the fitted sheet, then the fitted sheet can be easily removed, but it cannot be used on single-piece beds and strap loops cannot be used

Engineering Contradiction:

Improveease of removalVSAvoidcompatibility with bed types

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The corner of the fitted sheet is divided into two separate parts (first part and second part) separated by a notch, allowing the sheet to be secured without Velcro fasteners while maintaining ease of removal and compatibility with different bed types including single-piece beds

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the fitted sheet is easily removable, then it can be conveniently changed, but it can be misused in harsh environments such as prisons or hospitals

Engineering Contradiction:

Improveease of removalVSAvoidsecurity against misuse

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The corner is segmented into two parts separated by a notch, creating a secure structure that prevents easy removal while avoiding the use of Velcro fasteners that could be misused. The segmentation allows the sheet to be firmly attached yet still enable convenient changing when needed

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention removes Velcro fasteners from the design, eliminating the security risk they pose in harsh environments while maintaining the ability to securely attach the fitted sheet to the mattress through the notched corner structure

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If the fitted sheet is securely attached to prevent movement, then it prevents involuntary tearing, but it may be difficult to remove when needed

Engineering Contradiction:

Improveprevention of movement and tearingVSAvoidease of removal

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

By dividing the corner into two parts with a notch, the structure achieves secure attachment that prevents movement and tearing during use, while the segmented design allows for convenient removal when needed, balancing reliability with ease of operation

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4512281B1Cover sheet

Publication Date: 2026.04.22 MOBILISS

Figure 1~2
Figure 3
Figure 4

AI summary

The invention relates to a fitted sheet comprising a cover with a surrounding peripheral border intended to be folded down against a bed, said cover comprising at least one corner equipped with a sewing system adapted to hold said cover on the bed, in that the corner comprises a first part and a second part separated from each other by a notch, and in that the sewing system of each corner comprises a first seam adapted to form a first hem defining a first fold of the first part of the corner at the notch, and a second seam adapted to form a second hem defining a second fold of the second part of the corner at the notch; a third seam adapted to join the first hem and the second hem; a fourth seam adapted to join the first fold and the second fold.