Fitted Bed Sheet with Elastic Frame and Flat Top for Easy Folding
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Solution Overview
Problem
Traditional fitted sheets are difficult to put on a mattress due to their elasticized edges, which cause the sheet to bunch up, and are challenging to fold because of the sewn-in elastic, resulting in a messy, unstructured bundle.
Innovation Solution
A fitted bed sheet design featuring a top section made of inelastic material and a stretchable bottom section made of elastic material, sewn together with a single seam around the edges, allowing the sheet to lie flat and fold easily, eliminating the need for elastic cords and enabling easy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastic cords are sewn all around the fitted sheet edges, then the sheet can stretch to fit the mattress, but the sheet curdles and bunches up when being tucked under the mattress
Solution Approach 1:
The fitted sheet is divided into distinct sections: elasticized portions at the corners and sides for stretching, and a non-elasticized top portion for maintaining flatness. This segmentation allows different parts of the sheet to have different properties, resolving the contradiction between needing stretch and maintaining flatness.
Solution Approach 2:
Different portions of the sheet have different elastic properties. The corners and sides have elastic cords for stretching and fitting, while the top portion is intentionally made non-elastic to maintain its flat shape and prevent curdling when tucked under the mattress.
2Adaptability or versatility
If elastic cords are sewn into the fitted sheet, then the sheet can be stretched over the mattress, but the sheet becomes difficult to fold and creates a messy bundle
Solution Approach 1:
The sheet is segmented into elasticized portions (corners and sides) and a non-elasticized top portion. When folding, the non-elastic top portion maintains its structural integrity and flat shape, while the elastic portions are contained within, preventing the entire sheet from bunching into a messy bundle.
Solution Approach 2:
The non-elastic top portion provides a stable, foldable surface that maintains structure during folding operations, while the elastic portions are localized to areas where stretching is needed, not throughout the entire sheet.
3Adaptability or versatility
If elastic cords are placed at the head and foot of the sheet, then the sheet can fit the mattress, but the sheet still lacks structure when folded
Solution Approach 1:
The fitted sheet is divided into elasticized portions at the corners and sides for stretching and fitting, and a non-elasticized top portion that maintains structural stability. This segmentation ensures that when folded, the non-elastic top portion provides the necessary structure and form, preventing the sheet from becoming a formless bundle.
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 design allows for a smooth, flat installation on a mattress and easy folding, eliminating the bunching and structural issues of traditional fitted sheets, while maintaining a tight fit and ease of use.
Implementation Method 1
a stretchable bottom section made of elastic material
Data Source
AI summary
An easily foldable fitted sheet is disclosed, made of a flat top section with a backside of fabric flat against a backside of the flat bottom section joined together at their outlining edges. The flat top section is an inelastic rectangular sheet of fabric sewn all around at the outlining edges to the flat bottom section which is an elastic rectangular frame of fabric with no middle center and only one seam. The top portion can be made of an elastic material. When the fitted sheet's flat bottom section is stretched over any mattress it forms the side panels giving a tight fit and grips the underside of the mattress with the silicone beading or strip that is adhered to the inside edge of the bottom section. When the sheet is released from the mattress the bottom section's elastic material retains its flat rectangular shape and lies flat for ease of folding and storage.