Method and apparatus for contact winding
AssigneeE. I. Du Pont de Nemours and Company
InventorW. Mark Kirkpatrick
Life of this patent
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Abstract
A lay-on roll exerts a nip force against a roll of film winding upon a core. The lay-on roll is rotatably supported by a carriage capable of moving away from the center of the core as the wound roll of film increases in diameter. The carriage is connected to a linear bearing attached to a piston/cylinder assembly for continuously moving the carriage along a straight path colinear with a line connecting the center of the lay-on roll and the center of the core while maintaining a substantially constant nip force.
Claims8
In an apparatus for contact winding including a lay-on roll adapted to exert a nip force against a roll of film winding on a core, said lay-on roll being rotatably supported by a carriage capable of moving away from the center of said core as the winding roll of film increases in diameter, the improvement comprising said carriage being connected to means for continuously moving said carriage along a straight path colinear with a line connecting the center of said lay-on roll and the center of said core while maintaining a substantially constant nip force, said moving means including a first linear bearing slideably supported on a first shaft oriented along the same direction as said linear path, said first linear bearing being attached to both said carriage and a first piston of a first cylinder aligned parallel to the first shaft.
In a method for contact winding wherein a lay-on roll exerts a nip force against a roll of film winding on a core and moves away from the center of said core as the winding roll of film increases in diameter, said lay-on roll being rotatably supported by a carriage, the improvement in said method comprising the step of moving said carriage along a straight line colinear with a line connecting the center of said lay-on roll and the center of said core while maintaining a substantially constant nip force, said moving step being performed by sliding a first linear bearing along a supporting first shaft oriented along the same direction as said linear path, said first linear bearing being attached to both said carriage and a first piston of a first cylinder aligned parallel to said first shaft.
Dependencies are inferred from the claim text.