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US 11,623,835 B2Granted
Expander roller for fold-free expansion of foils
AssigneeKoti Onroerend Goed B.V.
InventorMichel Jozef Rene Lambert Huybreckx
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Abstract
An expander roller for a fold-free expansion of foils, webs, and sheet materials in a width dimension. The expander roller has a central metal axle mounted in a surrounding synthetic tube with placed on its circumference a grid of implanted brush plugs in an axial direction under an angle alpha and with a mutual distancing and in tangential direction under a center angle beta and with a mutual distance. The roller provides a perfect expanding or stretching of thin widths of different materials.
Claims10
An expander roller for fold-free expansion of foils comprises:
- a roller tube with a length L, a radius r, and an axle having ends placed in a support structure for free rotation;
- a plurality of brush plugs implanted in a grid array in a circumferential surface of the roller tube and having a common free length t, wherein:
- the brush plugs each form an angle alpha (α) with respect to a radial plane oriented transversely to the outer circumferential surface and a longitudinal axis of the roller tube;
- the brush plugs are each inclined in the tangential direction and form an angle partly beta (β=α/p) with a normal axial plane, where angle beta (β) is a centre angle;
- the brush plugs in each of a plurality of axially extending rows have a mutual centre-to-centre distance X;
- the brush plugs have a mutual separation distance in the tangential direction determined by the centre angle beta (β) and the radius r of the expander roller;
- and
- the brush plugs of every other axially extending row are axially shifted by a distance ½X relative to the brush plugs in the other axially extending rows.
5 more elements
Dependencies are inferred from the claim text.