Coreless surface winder and method
AssigneePaper Converting Machine Company
InventorsLawrence J. Oliver, Richard J. Vigneau
Life of this patent
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Abstract
A coreless surface winder and method wherein one of the winding rollers is accompanied by a slightly spaced apart arcuate dead plate which operates to cause a folded leading edge on a transversely severed web to roll upon itself and develop an incipient log which thereafter is completed in a conventional three roll cradle to provide a coreless retail sized roll.
Claims16
Apparatus for convolute winding a web log comprising a frame, a drum rotatably mounted in said frame and constituting a first winding roller, means for advancing a web for travel with the circumferential surface of said drum, a second winding roller rotatably mounted in said frame adjacent said first winding roller, a rider roller pivotally mounted in said frame and forming with said first and second winding rollers a three roller cradle, a knife roller rotatably mounted in said frame adjacent said drum and equipped with knife means for severing said web, said drum being equipped with slot means for receiving said knife means, said knife means and slot means being engageable for severing said web along a transverse line, means operably associated with said drum for immobilizing a free portion of said web against the surface of said drum, said immobilizing means being located a spaced distance rearward in the direction of drum rotation from said slot means to cause a severed web to fold rearwardly, a relatively elongated, arcuate dead plate located downstream from said immobilizing means and extending around a segment of the surface of said drum between said knife roller and said second winding roller, said dead plate being spaced from said drum a distance to cause said rearward fold to rub against said dead plate and roll on itself to develop an incipient log.
In a method of winding a web into a convolutely wound log without providing an axially extending opening in the log, the steps of providing a three roller surface winding cradle including a rotatable drum, a knife roll associated with said drum and an arcuate, relatively elongated dead plate extending around a surface segment of said drum and spaced therefrom to define with said drum an end providing a web inlet and an end providing an outlet,
- introducing a web into said inlet for travel with the circumferential surface said drum,
- transversely severing said web with said knife roll and substantially simultaneously therewith immobilizing on said drum a free portion of said web at a predetermined distance rearward in the direction of drum rotation of said transverse severing to develop a reverse fold in said web, introducing said web fold into said inlet,
- subjecting said web reverse fold to rubbing action between said dead plate and drum to cause said web fold to roll on itself to form an incipient log, and
- after said incipient log reaches said outlet, introducing said incipient log into said three roller winding cradle.
In a method of winding a web into a convolutely wound log without providing an axially extending opening in the log, the steps of providing a three roller surface winding cradle including a rotatable drum, a knife roll associated with said drum and an arcuate, relatively elongated dead plate extending around a surface segment of said drum and spaced therefrom to define with said drum an end providing a web inlet and an end providing an outlet,
- introducing a web into said inlet for travel with the circumferential surface of said drum,
- transversely severing said web with said knife roll and substantially simultaneously therewith immobilizing on said drum a free portion of said web at a predetermined distance rearward in the direction of drum rotation of said transverse severing to develop a reverse fold in said web, introducing said web fold into said inlet,
- subjecting said web reverse fold to rubbing action between said dead plate and drum to cause said web fold to roll on itself to form an incipient log, and
- after said incipient log reaches said outlet, introducing said incipient log into said three roller winding cradle, said steps including moving said reverse fold in a radially convergent portion of the space between said
- drum and dead plate to produce a convolution in said web, and moving said dead plate away from said drum at about the time said convolution is produced.
Dependencies are inferred from the claim text.