Achieving tension in a seating unit by pre-forming a frame

A - Human Necessities – 47 – C

Patent

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Details

A47C 31/02 (2006.01) A47C 4/30 (2006.01) A47C 5/06 (2006.01) A47C 23/24 (2006.01) B68G 7/12 (2006.01)

Patent

CA 2753191

Various methods for installing an article of fabric to a frame to provide an improved seating product, which can be integrated in essentially any type of seating unit, are provided. These methods include a pre-forming operation that deforms the frame prior to securing the fabric article thereto, and a securing operation that leverages post-mold shrinkage properties of the frame to secure the fabric article thereto. The pre-forming operation generates tension in the fabric article, which spans the frame, by initially deforming the frame utilizing compression mechanisms of an assembly fixture and subsequently loading the fabric article to the frame in a loose condition. Upon releasing the compression mechanisms, the fabric article assumes a taut condition that expresses the tension. The securing operation involves inserting a segment of the fabric article into a groove in the frame and allowing the groove to naturally clamp the segment during post-mold shrinkage.

L'invention concerne différents procédés d'installation d'un article de tissu sur un cadre afin de fournir un produit de siège amélioré, qui peut être intégré dans essentiellement n'importe quel type d'unité de siège. Ces procédés comprennent une opération de prémoulage qui déforme le cadre, avant d'y fixer l'article en tissu, et une opération de fixation qui augmente les propriétés de rétrécissement post-moulage du cadre, afin d'y fixer l'article en tissu. L'opération de prémoulage génère une tension dans l'article en tissu, qui étend le cadre, déformant initialement le cadre, en utilisant des mécanismes de compression d'un dispositif d'assemblage et en chargeant ensuite l'article en tissu sur le cadre dans une condition desserrée. Lors de la libération des mécanismes de compression, l'article en tissu prend une condition tendue qui exprime la tension. L'opération de fixation implique l'insertion d'un segment de l'article en tissu dans une cannelure dans le cadre et permet à la cannelure de fixer naturellement le segment pendant le rétrécissement post-moulage.

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