An extendible member

Details An extendible member An extendible member

B - Operations, Transporting

29

C

B29C 61/06 (2006.01) B65G 15/08 (2006.01) B29C 53/32 (2006.01)

Patent

CA 2283278

An extendible sheet member is configurable between first and second states. The first state is a coiled state (1.1) in which the member is coiled substantially parallel to a first axis and the second state is an extended state (1.2) in which the member extends substantially parallel to a second axis at some angle to the first axis. The member is made wholly or in part from a material or materials which give rise to internal stresses upon extension, these stresses acting at some angle to the second axis such as to bias the member to the second state. In many embodiments these stresses are produced by fibres which form part of the structure of said member. Said member is preferably reversibly configurable between said first and second states.

Un élément étirable en feuille peut être modelé entre deux états. Dans le premier état (1.1), l'élément est enroulé de façon sensiblement parallèle à un premier axe alors que dans le deuxième état (1.2), il s'étire de façon sensiblement parallèle à un deuxième axe, qui forme un certain angle avec le premier axe. L'élément est constitué partiellement ou intégralement d'un ou de plusieurs matériaux qui donnent lieu à des contraintes internes lors de l'élongation. Ces contraintes s'exercent à un certain angle par rapport au deuxième axe de façon à amener l'élément dans un deuxième état. Dans de nombreuses réalisations de l'invention, ces contraintes sont produites par des fibres qui font partie de la structure de l'élément. De préférence, l'élément peut passer du premier au second état et du second au premier.

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