Fitted Sheet Corner Structure for Variable Mattress Thickness
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Solution Overview
Problem
Conventional fitted sheets often become displaced and fail to fit snugly on mattresses of varying thicknesses and shapes due to the blending of stretchable and non-stretchable fabric portions, leading to issues like differential shrinkage and a mottled appearance after laundering.
Innovation Solution
A fitted sheet design featuring continuous side and end panels made from the same fabric, with special seams and flexible, stretchable strips at corners and along edges to ensure a snug fit and adaptability to different mattress dimensions, using a standard fabric construction process like weaving or knitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stretchable and non-stretchable fabric portions are blended into the side panels, then the fitted sheet can accommodate varying mattress thicknesses, but differential shrinkage and mottled appearance occur after laundering
Solution Approach 1:
The side panels are divided into distinct stretchable strips (separate elements) and non-stretchable fabric portions, rather than blending them together. These segments are assembled together to provide localized elasticity where needed while maintaining overall fabric uniformity, preventing differential shrinkage and mottled appearance.
Solution Approach 2:
Stretchable properties are concentrated in specific localized regions (the stretchable strips at corners and along edges) rather than distributed throughout the entire side panel. This allows the fitted sheet to accommodate mattress thickness variations at critical areas while maintaining uniform fabric composition and appearance in the main body panels.
2Adaptability or versatility
If stretchable and non-stretchable yarns are blended into fabric portions, then the fitted sheet can adapt to mattress contours, but the fabric exhibits mottled appearance and coloration differences
Solution Approach 1:
The fabric is segmented into uniform non-stretchable portions for the main panels and separate stretchable strips for the edges and corners. This segmentation ensures that the majority of the visible fabric surfaces maintain consistent appearance, while the stretchable segments handle the contour adaptation function.
Solution Approach 2:
The stretchable quality is applied locally only to the strips at corners and along the free peripheral edges, where contour adaptation is most needed. The main top panel and central portions of side panels use uniform non-stretchable fabric, preserving a clean, mottled-free appearance in the most visible areas.
3Ease of manufacture
If conventional fitted sheets are used, then they can cover the mattress surface, but they become displaced during use
Solution Approach 1:
The fitted sheet incorporates dynamic stretchable strips that can elastically deform and recover, allowing the sheet to dynamically adapt to mattress contours and maintain continuous contact. This dynamic behavior prevents displacement while the sheet remains simple in overall construction.
Solution Approach 2:
Stretchable strips function as flexible elements within the sheet structure, allowing the fabric to conform flexibly to the three-dimensional contours of the mattress. This flexibility ensures the sheet remains securely in place without complex construction, as the elastic strips provide continuous anchoring force.
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 ensures the fitted sheet remains in place, accommodates varying mattress thicknesses and shapes, and maintains a smooth appearance without the undesirable effects of blending stretchable and non-stretchable fabric portions, providing a cost-effective and durable alternative to prior art solutions.
Implementation Method 1
flexible and stretchable strips or tapes, which stretch when pulled
Data Source
AI summary
An article of bedding for disposition over the top, side and end surfaces of a mattress comprises a substantially inelastic web of textile material which includes a top panel, side and end panels, and corner seams. The article further comprises a stretchable corner member overlying each corner seam, an additional seam aligned axially with each corner seam, and a stretchable border member secured to the peripheral edges of the side panels. This construction allows the article to accommodate the contours of mattresses of varying thicknesses within each given peripheral mattress size classification. Methods of making such articles are also disclosed.