Method of fabricating a tubular cell window covering with...

E - Fixed Constructions – 06 – B

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E06B 9/262 (2006.01) B29C 65/48 (2006.01) B31D 3/02 (2006.01) B32B 3/12 (2006.01)

Patent

CA 2127569

An expandable and contractible tubular cell window covering includes a plurality of contiguous cells which have been bonded together to form a wavy or undulating pattern along the length of the cells. The undulating or wavy patterns can be created by initially stretching the cells before bonding adjacent cells and subsequently releasing the stretch so that the fibers engaged with the bonding medium remain in a stretched or separated condition while the remaining fibers are relaxed. The cells can also be bonded with an adhesive that expands on curing to create the same effect without having to prestretch the fabric before applying the bonding medium. In a third embodiment of the invention, adjacent tubular cells are bonded together with curved lines of adhesive which again create an undulating or wavy configuration along the length of each tubular cell. The methods for forming the window covering is also disclosed.

Couvre-fenêtre à alvéoles tubulaires extensibles et comprimables muni d'un certain nombre d'alvéoles adjacentes reliées entre elles pour créer des ondulations dans le sens de leur longueur. On peut créer ces formes ondulantes en étirant d'abord les alvéoles avant de les relier l'une à l'autre et en relâchant ensuite cet étirement initial pour que les fibres saisies par l'organe de liaison conservent leur extension ou restent séparées les unes des autres, alors que le reste des fibres se desserrent. On peut également relier ces alvéoles entre elles par un adhésif qui se gonfle en séchant pour obtenir le même effet sans qu'il soit nécessaire d'étirer d'abord le tissu avant de lui appliquer un agent de liaison. Dans une troisième configuration, les alvéoles tubulaires adjacentes sont reliées entre elles par des lignes courbes d'adhésif qui, dans ce cas également, créent une forme ondulée suivant le sens de la longueur de chaque alvéole tubulaire. On indique également comment fabriquer le couvre-fenêtre.

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