Listing Bead Insertion Tool for Wrinkle-Free Upholstery Fastening
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Solution Overview
Problem
Existing methods for attaching upholstery fabric panels to foam structures, such as in automotive seats, often result in puckering or trim wrinkles due to high force requirements and are inefficient, especially when using point attachment or clip systems.
Innovation Solution
A tool with a guiding recess and guide rib is used to progressively insert a listing bead into a retention channel of a fastener strip, allowing for angled insertion and retention between rows of fastener elements, facilitating easy and secure attachment of the fabric panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If point attachment or clip systems are used to secure fabric panels, then attachment efficiency is improved, but the force required to engage the bead increases causing puckering or trim wrinkles
Solution Approach 1:
The patent introduces a channel-shaped fastener strip with rows of fastener elements as an intermediary component between the listing bead and the fabric panel. This fastener strip distributes the engagement force along its length through multiple fastener elements, rather than concentrating force at discrete attachment points. The channel shape guides the listing bead into proper engagement while the multiple rows of fastener elements provide distributed retention, reducing peak forces that cause puckering while maintaining attachment efficiency.
2Strength
If high force is applied to engage the bead into the clip, then secure attachment is achieved, but puckering or trim wrinkles occur
Solution Approach 1:
The fastener strip is segmented into multiple discrete fastener elements arranged in opposing rows within the channel. Each fastener element independently engages the listing bead, distributing the attachment strength across many small contact points rather than relying on a single high-force engagement. This segmentation maintains overall attachment strength while eliminating the concentrated force that causes puckering and trim wrinkles in the fabric panel.
3Reliability
If traditional fastening methods are used, then secure attachment is achieved, but the process is inefficient and time-consuming
Solution Approach 1:
The fastener strip is pre-formed with a channel shape and pre-positioned rows of fastener elements before the listing bead engagement process. This preliminary configuration allows the listing bead to be simply inserted into the channel and automatically engaged by the pre-positioned fastener elements, eliminating the need for complex multi-step fastening operations. The pre-configured fastener strip maintains reliable attachment while dramatically improving fastening efficiency and reducing installation time.
Data Source
AI summary
A listing bead fastening tool has a body that defines a guiding recess shaped to receive a listing bead, and a guide rib extending from the body. The guide rib has a neck and a head that is connected to the body of the tool by the neck. The head has a width to allow it to pass through a retention channel defined by opposing rows of fastener elements extending from a base of a fastener strip to which the listing bead is to be fastened. The guiding recess of the body of the tool defines a listing bead insertion path that is angled with respect to the retention channel. Moving the tool along the retention channel causes the listing bead, which is retained within the guiding recess, to be progressively inserted into the retention channel and retained between the rows of fastener elements.