Abrasive finishing tool

An abrasive grinding tool having a tool face, comprising:

• a layer of stiff yet yielding abrasive loaded extruded plastic filaments secured to a shaft;
• each of the filaments having two side sections projecting radially in opposite directions from a longitudinal axis of said shaft and then being circumferentially curved whereby at the tool face the filaments extend circumferentially in a predetermined bend;
• and
• each of the filaments having an abrasive material embedded substantially uniformly therein throughout.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular said longitudinal axis;
• each monofilament in said bundle having a generally rectangular transverse cross-sectional shape and having an abrasive material embedded substantially homogeneously therein throughout;
• wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick;
• wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis;
• wherein said monofilaments are loaded with at least 30% by weight of abrasive material;
• wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft;
• wherein said end sections bend circumferentially away from the intended direction of rotation of the tool;
• wherein said predetermined bend is an angle, said angle being obtuse relative to a convex surface of the intermediate section.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular said longitudinal axis;
• each monofilament in said bundle having a generally rectangular transverse cross-sectional shape and having an abrasive material embedded substantially homogeneously therein throughout;
• wherein said monofilaments are positioned slightly radially and axially apart from adjacent monofilaments whereby a helical pattern is formed.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular said longitudinal axis;
• each monofilament in said bundle having a generally rectangular transverse cross-sectional shape and having an abrasive material embedded substantially homogeneously therein throughout;
• wherein said shaft comprises a wire having two stem sections and a securing section between said stem sections, said securing section enclosing said bundle and said stem sections being twisted beyond said bundle to form a twisted stem;
• wherein said securing section of said wire is twisted whereby said monofilaments project radially outwardly in a helical pattern along said longitudinal axis of said shaft.

An abrasive grinding tool having a tool face, comprising:

• a layer of stiff yet yielding abrasive loaded plastic filaments secured to a shaft;
• each of the filaments having two side sections projecting radially in opposite directions from a longitudinal axis of said shaft and then being circumferentially curved whereby at the tool face the filaments extend circumferentially in a predetermined bend;
• and
• each of the filaments having an abrasive material embedded substantially homogeneously therein throughout;
• wherein the side sections are bent circumferentially away from the intended direction of rotation of the tool;
• wherein said bend is an angle relative to an intermediate section and said angle is obtuse.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of extruded plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular to said longitudinal axis;
• each monofilament in said bundle having a generally transverse rectangular cross-sectional shape and having an abrasive material embedded substantially uniformly therein throughout, wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick, wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis, wherein said monofilaments are loaded with at least 30% by weight of abrasive material, wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of extruded plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular to said longitudinal axis;
• each monofilament in said bundle having a generally transverse rectangular cross-sectional shape and having an abrasive material embedded substantially uniformly therein throughout, wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick, wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis, wherein said monofilaments are loaded with at least 30% by weight of abrasive material, wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft wherein said end sections bend circumferentially away from the intended direction of rotation of the tool.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of extruded plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular to said longitudinal axis;
• each monofilament in said bundle having a generally transverse rectangular cross-sectional shape and having an abrasive material embedded substantially uniformly therein throughout, wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick, wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis, wherein said monofilaments are loaded with at least 30% by weight of abrasive material, wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft wherein said end sections bend circumferentially away from the intended direction of rotation of the tool wherein said predetermined bend on each side of said shaft is a curve.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of extruded plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular to said longitudinal axis;
• each monofilament in said bundle having a generally transverse rectangular cross-sectional shape and having an abrasive material embedded substantially uniformly therein throughout, wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick, wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis, wherein said monofilaments are loaded with at least 30% by weight of abrasive material, wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft wherein said end sections bend circumferentially away from the intended direction of rotation of the tool wherein said predetermined bend on each side of said shaft is a curve wherein said predetermined bend is an angle, said angle being obtuse relative to a convex surface of the intermediate section.

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of extruded plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular to said longitudinal axis;
• each monofilament in said bundle having a generally transverse rectangular cross-sectional shape and having an abrasive material embedded substantially uniformly therein throughout, wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick, wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis, wherein said monofilaments are loaded with at least 30% by weight of abrasive material, wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft wherein said end sections bend circumferentially away from the intended direction of rotation of the tool wherein said predetermined bend on each side of said shaft is a curve wherein said predetermined bend is an angle, said angle being obtuse relative to a convex surface of the intermediate section wherein said angle is between 100.degree. and 170.degree..

An abrasive grinding tool comprising:

• a shaft having a longitudinal axis;
• and
• a relatively thin flat bundle of extruded plastic monofilaments having a central section, two end sections and two intermediate sections between said central section and said end sections;
• said central section of said bundle being secured to said shaft whereby said intermediate sections project radially outwardly from two sides of said shaft in a direction generally perpendicular to said longitudinal axis;
• each monofilament in said bundle having a generally transverse rectangular cross-sectional shape and having an abrasive material embedded substantially uniformly therein throughout, wherein the rectangular cross-sectional shape has a width dimension and a thickness dimension, said width dimension being at least twice the magnitude of said thickness dimension whereby each monofilament is at least twice as wide as it is thick, wherein said monofilaments are oriented so that the width dimension is generally parallel to said longitudinal axis, wherein said monofilaments are loaded with at least 30% by weight of abrasive material, wherein said end sections bend circumferentially away from said intermediate sections forming a predetermined bend on each side of said shaft wherein said end sections bend circumferentially away from the intended direction of rotation of the tool wherein said predetermined bend on each side of said shaft is a curve wherein said predetermined bend is an angle, said angle being obtuse relative to a convex surface of the intermediate section, said angle being between 100.degree. and 170.degree..