Fitted sheet constructs and methods of making the same
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Solution Overview
Problem
Traditional fitted sheets require complex manufacturing steps, including cutting complex shapes and sewing non-linear seams, which complicates the construction process and can lead to issues like fraying and reduced durability.
Innovation Solution
A method of constructing fitted sheets by creating four separate seams along a folded blank using distinct sewing operations, with optional cutting operations to create arched end edges, allowing for precise control over seam placement and color differentiation to enhance durability and aesthetic indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If complex manufacturing steps including cutting blanks into complex shapes and sewing along non-linear seams are used, then the fitted sheet can be constructed to approximate mattress shape, but the manufacturing process becomes complex and durability is reduced
Solution Approach 1:
The patent divides the fitted sheet construction into distinct segments: a rectangular blank portion and four corner portions that are separately constructed and then joined. This segmentation allows each part to be manufactured using simple, standardized processes rather than complex non-linear operations, resolving the contradiction between achieving the required shape and maintaining manufacturing simplicity.
2Shape
If complex manufacturing steps including cutting blanks into complex shapes and sewing along non-linear seams are used, then the fitted sheet can be constructed to approximate mattress shape, but durability is reduced due to fraying and wear
Solution Approach 1:
The patent applies preliminary action by constructing the corner portions as separate, pre-formed units with completed edges before joining them to the rectangular blank. This preliminary construction allows for proper edge finishing and reinforcement to be applied to each corner portion independently, preventing fraying and improving durability before the final assembly occurs.
Solution Approach 2:
The corner portions serve as intermediary elements that connect the rectangular blank to the elasticized perimeter. By introducing these intermediate corner sections, the patent creates a more durable construction where stress and wear are distributed across multiple joined sections rather than concentrated along continuous non-linear seams.
3Reliability
If four separate seams are created using distinct sewing operations, then seam control and durability are enhanced, but the number of manufacturing steps increases
Solution Approach 1:
The patent segments the seam construction into four distinct sewing operations, each creating a separate seam at a different location on the fitted sheet. This segmentation allows each seam to be optimized for its specific location and function, improving overall seam durability and control while maintaining manufacturing efficiency through standardized repeatable operations.
Data Source
AI summary
A fitted sheet (800) includes a first side margin (106) and the second side margin (107) folded about a first fold line (104) and a second fold line (105), respectively, toward a central panel (108) such that sides of the first side margin and the second side margin are separated by a separation (208). A first edge (209) and a second edge (211) occur where the first side margin and the central panel abut, while a third edge (210) and a fourth edge (212) occur where the second side margin and the central panel abut. The first edge includes a first seam (405), while the second edge includes a second seam (406). The third edge includes a third seam (407), while the fourth edge includes a fourth seam (408). Each seam is applied by a different sewing operation. At least two seams are different in color.