Flat Fitted Sheet Corner Fasteners for Mattress Fit Without Elastic
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Solution Overview
Problem
Conventional fitted sheets face issues with snugness over mattresses of varying thicknesses, requiring elastic strips that lead to wear, bulkiness, and the need to lift the mattress for installation, while existing solutions complicate manufacturing and storage.
Innovation Solution
A flat fitted sheet design with releasable corner fasteners, including male and female elements like buttons, snaps, or VELCRO, that form pockets around mattress corners without elastic strips, allowing easy installation and removal without lifting the mattress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastic strips are sewn around the bottom corners of the sheet to create pockets, then the sheet fits snugly over mattresses of various thicknesses, but the elastic strips wear out, making the sheet bulky and requiring the mattress to be lifted for installation
Solution Approach 1:
The patent removes the elastic strips from the sheet construction entirely. Instead, it uses a flat sheet with corner portions that can be wrapped around mattress corners and secured with ties or tucks, eliminating the component that wears out while maintaining the ability to fit various mattress thicknesses.
Solution Approach 2:
The sheet is designed with separate corner portions that can be independently manipulated and secured. Each corner can be wrapped and fastened separately, allowing the sheet to adapt to different mattress dimensions without requiring elastic materials.
2Adaptability or versatility
If elastic strips are sewn around the bottom corners of the sheet to create pockets, then the sheet fits snugly over mattresses, but the sheet becomes bulky to store, wash, and handle
Solution Approach 1:
By removing the elastic strips and three-dimensional pocket construction, the sheet remains flat and two-dimensional throughout its entire lifecycle - storage, washing, handling, and use. This eliminates the bulkiness caused by pre-formed elastic pockets while maintaining fitted functionality.
Solution Approach 2:
The sheet transitions from a static, pre-formed pocket structure to a dynamic system where the flat corners are actively wrapped and secured around the mattress. This allows the sheet to adapt its shape as needed while maintaining a simple flat form for storage and handling.
3Adaptability or versatility
If conventional fitted sheets are used with relatively thicker or larger mattresses, then the sheet must be stretched over the mattress, but ripping or tearing of the corner construction may occur
Solution Approach 1:
The patent eliminates the stretched corner construction entirely by removing elastic strips. Instead, corners are wrapped around the mattress and secured with ties or tucks, distributing the mechanical stress away from any single point and preventing ripping or tearing.
Solution Approach 2:
The corner portions are pre-positioned and wrapped around the mattress corners before final securing. This preliminary wrapping action distributes the load and prevents concentrated stress that would cause tearing during installation or use.
4Ease of operation
If conventional fitted sheets require the end user to lift at least one corner of the mattress to place the fitted sheet on the mattress, then the sheet can be installed, but the process becomes difficult and time-consuming
Solution Approach 1:
The sheet corners are designed as separate, independently manipulable portions that can be wrapped and secured one at a time. This segmentation allows installation without lifting the mattress, as each corner can be accessed and fastened separately while the mattress remains in place.
Solution Approach 2:
Instead of pulling the sheet corners over the mattress from the top (which requires lifting), the method inverts the approach by wrapping the corners from the side and securing them with ties or tucks, eliminating the need to lift the mattress during installation.
Data Source
AI summary
This invention relates to flat bedding top sheets having releasable corner fasteners adapted to releasably secure sheet to an underlying mattress by having male elements placed on one side panel brought into alignment and contact with female elements located on opposite corresponding side panels to form corners. Specifically, the bed sheet of the present invention is a fitted flat sheet having a cutout portions at both of its bottom corners that permit, with the aid of separable fasteners located at the cutout portions, to convert the sheet from a planar configuration to a configuration comprising two pockets adapted to retain the sheet on the mattress. The top sheets of the present invention do not require elastic strips around the corners of the sheets to secure the sheet to the mattress.