Plastic bobbin and a method of manufacturing such a bobbin

B - Operations – Transporting – 65 – H

Patent

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B65H 75/14 (2006.01) B65H 75/22 (2006.01) B65H 75/50 (2006.01)

Patent

CA 2474241

A bobbin (1) of plastic has a cylinder (2) and, formed integrally therewith, circumferential end flanges (3) and is made of a U-shaped channel. Each end flange (3) consists of a plurality of spaced-apart, essentially radial flange elements (4) which are distributed along the circumference of the cylinder (2). In a method of manufacturing such a bobbin, a U-shaped channel is made by injection moulding. The U shaped channel is given such a shape that its side walls consist of a plurality of spaced-apart wall elements which are distributed along the length of the channel. The channel is bent to form the cylinder (2) and its ends are connected with each other in this bent position.

L'invention concerne une bobine (1) en plastique comprenant un cylindre (2) et des joues terminales circonférentielles (3) qui sont formées d'une seule pièce avec le cylindre, cette bobine étant constituée d'un canal en U. Chaque joue (3) consiste en une pluralité d'éléments flasques radiaux (4) espacés, qui sont répartis sur la circonférence du cylindre (2). Selon le procédé de production d'une telle bobine, un canal en U est réalisé par moulage par injection. Le canal en U a une forme telle que ses parois latérales consistent en une pluralité d'éléments paroi espacés qui sont répartis sur la longueur du canal. Le canal est plié pour former le cylindre (2) et ses extrémités sont raccordées l'une à l'autre dans cette position pliée.

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