Device for winding and/or unwinding a film at a constant speed
AssigneeKis
InventorPatrice Lavergne
Life of this patent
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Abstract
A device for winding and/or unwinding a film at a constant speed includes a reel comprising two coaxial annular support areas, having the same diameter, which are separated by a concavity and which are spaced out from one another by a distance that is slightly smaller than the width of the film. The two support areas pivot freely. Guide means guide the film laterally in order to wind the film on the reel such that the lateral edges thereof rest on the two support areas of the reel respectively. Two parallel drive belts are supported respectively on said edges, along the length of an arc of circle with a predetermined angle at the center. The invention applied to a film in an optoelectronic apparatus, such as a scanning and analysis device.
Claims11
A device for winding and/or unwinding a film at a constant speed, including:
- a reel comprising two coaxial annular support areas, of equal diameter, which are separated from each other by a concavity and which are spaced out from one another by a distance that is slightly smaller than a width of the film, the two support areas pivoting freely,
- guide means which guide the film laterally in order to wind it onto the reel such that lateral edges of the film bear on the two respective support areas of the reel, and
- two parallel drive belts supported on said respective edges along a length of an arc of a circle subtending a predetermined angle at a center.
Dependencies are inferred from the claim text.