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.
Abstract:
An apparatus for forming bristle sub-assemblies includes a vertically oriented slot, which is formed by two endless belts. A wheel disposed above the slot pushes a bristle string into the slot. The bristle string has a plurality of bristles connected to a base string in two rows. The bristle rows can be horizontally oriented, so that all of the bristles are co-planar in a horizontal plane, or they can be angularly oriented with the base string at the vertex of the angle. When the bristles are pushed into the slot, they bend to adopt a new, substantially parallel orientation. An ultrasonic heater heats the bent bristles to re-set the thermoplastic material from which the bristles are made so that after cooling, the parallel orientation is maintained.
Abstract:
An apparatus for forming bristle sub-assemblies includes a vertically oriented slot, which is formed by two endless belts. A wheel disposed above the slot pushes a bristle string into the slot. The bristle string has a plurality of bristles connected to a base string in two rows. The bristle rows can be horizontally oriented, so that all of the bristles are co-planar in a horizontal plane, or they can be angularly oriented with the base string at the vertex of the angle. When the bristles are pushed into the slot, they bend to adopt a new, substantially parallel orientation. An ultrasonic heater heats the bent bristles to re-set the thermoplastic material from which the bristles are made so that after cooling, the parallel orientation is maintained.
Abstract:
A method is disclosed for imparting a graphic design to the upper surface of a fabric suitable for use as a wall or floor covering. The graphic design is formed by an elongated pile article having a plurality of filament bundles attached to an elongated support strand. The fabric may be a tufted, woven, nonwoven, flocked fabric or a needled felt. The elongated pile article may be attached to the fabric by various methods, including ultrasonically bonding, applying an adhesive, sewing, stapling or using plastic fasteners. A transfer sheet is disclosed to aid in attaching by ultrasonically bonding, the sheet being made from a fusible material having the elongated pile article is attached thereto. The transfer sheet is positioned on the fabric, the elongated pile article is then ultrasonically bonded, melting a portion of the transfer sheet material, and the unmelted portion is then removed.
Abstract:
Bristle stiffness is varied by allowing a support beam that carries the bristles to undergo torsional movement in response to brushing action. Torsional movement is achieved by allowing the support beam to be disconnected to the brush head along at least portions of the length of the support beam. In particularly preferred embodiments, brushes employing the varying stiffness techniques are made with bristle sub-assemblies that have at least one row of bristles connected to a base string or similar structure that functions as a support beam. The base string can be connected across an opening in the brush, and is thus connected at its opposite ends, or it can be connected at any number of spaced intervals, the number and length of spacing being selected to achieve a desired degree of stiffness.
Abstract:
An apparatus for forming bristle sub-assemblies includes a vertically oriented slot, which is formed by two endless belts. A wheel disposed above the slot pushes a bristle string into the slot. The bristle string has a plurality of bristles connected to a base string in two rows. The bristle rows can be horizontally oriented, so that all of the bristles are co-planar in a horizontal plane, or they can be angularly oriented with the base string at the vertex of the angle. When the bristles are pushed into the slot, they bend to adopt a new, substantially parallel orientation. An ultrasonic heater heats the bent bristles to re-set the thermoplastic material from which the bristles are made so that after cooling, the parallel orientation is maintained.
Abstract:
Methods and apparatuses 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.
Abstract:
Several brush assemblies are disclosed. All employ bristle strings that include a base string connected to a plurality of monofilaments. The preferred monofilaments are nylons and other polymeric thermoplastic materials. The monofilaments may be linear segments or loop segments disposed in two rows. The bristle strings may be connected to brush bodies to form virtually any of the various types of brushes. Bristle strings employing loops may be braided together to form entangled, monofilament articles for brush or other applications.
Abstract:
Several brush assemblies are disclosed. All employ bristle strings that include a base string connected to a plurality of monofilaments. The preferred monofilaments are nylons and other polymeric thermoplastic materials. The monofilaments may be linear segments or loop segments disposed in two rows. The bristle strings may be connected to brush bodies to form virtually any of the various types of brushes. Bristle strings employing loops may be braided together to form entangled, monofilament articles for brush or other applications.
Abstract:
A bristle sub-assembly includes first and second base strings and a plurality of polymeric monofilaments connected to and extending between the first and second base strings. The polymeric monofilaments form a first arched row when the first and second base strings are brought together. Several types and configurations of brushes are made using either arched bristles or combinations of arched and straight bristles.