Method for making articles having bristles
AssigneeE. I. Du Pont de Nemours and Company
InventorsMark Stephen Edwards, Jeffrey Allen Chambers
Life of this patent
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Abstract
Methods and apparatus for making elongated articles are disclosed. One method includes feeding at least one base string along an axis, wrapping at least one monofilament around the axis to produce a number of monofilament wraps per length of base string which are transported by the base string, bonding the wraps to the base string with ultrasonic energy, and cutting the wraps at a point downstream of where the wraps are bonded to the base string. The result is an article having two rows of monofilament segments connected to the base string.
Claims1
A method of making an elongated article comprising the steps of feeding at least one base string along an axis, wrapping at least one monofilament around the axis to and over the at least one base string to produce a number of monofilament wraps which are transported by the at least one base string;
- feeding at least one locking string into contact with the at least one base string, whereby the monofilament wraps are disposed between the at least one base string and that the least one locking string;
- pressing the at least one locking string into frictional engagement with the at least one base string in a groove along the axis of the base string to thereby capture the monofilament wraps there between;
- and
- cutting the wraps to thereby form at least one elongated article having two rows of monofilament segments connected between the base strings and the locking strings.
Dependencies are inferred from the claim text.